Thermoplastic elastomer with high resistance, elasticity and good paintability and high impact resistant polymer blends prepared therefrom
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10 claims: 6 independent, 4 dependent
- 1Thermoplastische Elastomere hoher Festigkeit, Elastizität und guter Einfärbbarkeit, deren eingelagerte Elastomerpartikel einen mittleren Partikeldurchmesser von 0,05 bis 5 µm, bevorzugt 0,1 bis 1 µm, haben, aus Propylen-Homopolymeren und/oder Propylen-Copolymeren, elastomeren C 2 -C 8 -Olefin-Co- und/oder -Terpolymeren, mehrfunktionell ungesättigten Monomeren, gegebenenfalls thermisch zerfallenden Radikalbildnern und Hilfsstoffen, dadurch gekennzeichnet, daß die thermoplastischen Elastomere nach einem Verfahren hergestellt worden sind, bei dem Mischungen aus 20 bis 80 Masse%, bevorzugt 40 bis 60 Masse%, Propylen-Homopolymeren und/oder Propylen-Copolymeren, 80 bis 20 Masse%, bevorzugt 60 bis 40 Masse%, elastomeren C 2 -C 8 -Olefin-Co- und/oder -Terpolymeren, 0,10 bis 4,0 Masse%, bevorzugt 0,2 bis 1,5 Masse%, bezogen auf die Summe der eingesetzten Polymere, leichtflüchtigen C 4 -C 7 -Dienen und 0 bis 4,0 Masse%, bevorzugt 0,2 bis 1,5 Masse%, bezogen auf die Summe der eingesetzten Polymere, Acylperoxiden, Alkylperoxiden, Hydroperoxiden, Peroxycarbonaten, Perestern, Ketonperoxiden, Peroxiketalen und/oder Azoverbindungen als thermisch zerfallende Radikalbildner in der Schmelze umgesetzt worden sind, wobei vor und/oder nach der Umsetzung 0,01 bis 40 Masse%, bezogen auf die Summe der eingesetzten Polymere, Hilfsstoffe zugesetzt werden können.
- 2Thermoplastische Elastomere nach Anspruch 1, dadurch gekennzeichnet, daß die als Propylen-Homopolymere und/oder Propylen-Copolymere eingesetzten Polypropylene a) weitgehend isotaktische Propylen-Homopolymere, die bevorzugt unter Anwendung von Ziegler-Natta-Katalysatoren oder Metallocenkatalysatoren hergestellt worden sind, oder b) Copolymere aus Propylen und Ethylen bzw. α-Olefinen mit 4 bis 18 C-Atomen, bevorzugt statistische Propylen-Copolymere, Propylen-Blockcopolymere und/oder statistische Propylen-Blockcopolymere oder c) Mischungen aus 50 bis 98 Masse% der Polymeren a) und/oder b) und 2 bis 50 Masse% von c1) nichtisotaktischen Propylen-Homopolymeren mit einem Schmelzpunkt von 145 bis 165°C, einer Schmelzviscosität von 200000 bis 2000000 cps bei 190°C, einer Kristallisationswärme von 4 bis 10 cal/g und einem löslichen Anteil in Diethylether von 35 Masse% bis 55 Masse%;c2) weitgehend amorphen Propylen-Homopolymere oder Propylen-Copolymeren mit einem Anteil an kristallinem Propylen-Homopolymer bzw. kristallinem Propylen-Copolymer unter 10 Masse%, einer Schmelzenthalpie unter 40 J/g und einem Schmelzindex von 0,1 bis 100 g/10 min bei 230°C/2,16 kg, wobei das weitgehend amorphe Polypropylen ein Homopolymer des Propylens und/oder ein Copolymer des Propylens aus mindestens 80 Mol % Propylen und höchstens 20 Mol % eines oder mehrerer α-Olefine der allgemeinen Formel CH 2 =CHR ist, wobei R ein linearer oder verzweigter Alkylrest mit 2 bis 8 Kohlenstoffatomen ist;und/oder c3) nichtlinearen modifizierten Propylen-Homopolymeren und/oder Propylen-Copolymeren mit Schmelzindices von 0,1 bis 30 g/10 min bei 230°C/2,16 kg und einem Quotienten aus der Grenzviscosität des nichtlinearen modifizierten Propylen-Homopolymeren und/oder Propylen-Copolymeren und der Grenzviscosität des linearen Propylen-Homopolymeren und/oder Propylen-Copolymeren mit weitgehend gleichem Molmassen-Gewichtsmittel von 0,20 bis 0,99;oder d) Mischungen der Polymere a) bis c) sind.
- 3Thermoplastische Elastomere nach Anspruch 1, dadurch gekennzeichnet, daß die Propylen-Copolymere aus einem Blend aus a) 60 bis 98 Masse% eines kristallinen Copolymeren aus 85 bis 99,5 Masse% Propylen und 15 bis 0,5 Masse% Ethylen und/oder einem α-Olefin der allgemeinen Formel CH 2 =CHR, wobei R ein linearer oder verzweigter Alkylrest mit 2 bis 8 Kohlenstoffatomen ist, b) 2 bis 40 Masse% eines elastischen Copolymers aus 20 bis 70 Masse% Ethylen und 80 bis 30 Masse% Propylen und/oder einem α-Olefin der allgemeinen Formel CH 2 =CHR, wobei R ein linearer oder verzweigter Alkylrest mit 2 bis 8 Kohlenstoffatomen ist, bestehen.
- 4Thermoplastische Elastomere nach einem oder mehreren der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß die elastomeren C 2 -C 8 -Olefin-Co- und/oder -Terpolymere Ethylen-Propylen-Elastomere, Ethylen-Propylen-Dien-Elastomere, Ethylen-Vinylacetat-Copolyere , chlorsulfoniertes Polyethylen, Ethylen-Styren-Elastomere, elastomere Copolymere aus Ethylen und C 4 -C 8 -Olefinen - bevorzugt elastomere Ethylen-Buten-Copolymere, Ethylen-Hexen-Copolymere und/oder Ethylen-Octen-Copolymere -, elastomere Butadien-Styren-Co- und/oder -Terpolymere - bevorzugt Styren-Ethylen-Butadien-Styren-Blockcopolymere -, und/oder Styren-Isopren-Cound/oder -Terpolymere sind.
- 5Thermoplastische Elastomere nach einem oder mehreren der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß die leichtflüchtigen C 4 -C 7 -Diene Butadien, Chloropren, Cyclohexadien, Cyclopentadien, Dimethylbutadien, Heptadien, Hexadien, Isopren und/oder 1,4-Pentadien sind.
- 6Hochschlagzähe Polymerblends aus a) 5 bis 95 Masse%, bevorzugt 10 bis 50 Masse%, an thermoplastischen Elastomeren nach einem oder mehreren der Ansprüche 1 bis 5 und b) 95 bis 5 Masse%, bevorzugt 90 bis 50 Masse%, an b1) nichtmodifizierten Polyolefinen, bevorzugt an weitgehend isotaktischen Propylen-Homopolymeren, Copolymeren aus Propylen und Ethylen bzw. α-Olefinen mit 4 bis 18 C-Atomen - insbesondere statistischen Propylen-Copolymeren, Propylen-Blockcopolymeren und/oder statistischen Propylen-Blockcopolymeren -, nichtisotaktischen Propylen-Homopolymeren, weitgehend amorphen Polypropylenen, nichtlinearen Propylenpolymeren und/oder b2) Blends aus b2.1) 60 bis 98 Masse% eines kristallinen Copolymeren aus 85 bis 99,5 Masse% Propylen und 15 bis 0,5 Masse% Ethylen und/oder einem α-Olefin der allgemeinen Formel CH 2 =CHR, wobei R ein linearer oder verzweigter Alkylrest mit 2 bis 8 Kohlenstoffatomen ist, b2.2) 2 bis 40 Masse% eines elastischen Copolymers aus 20 bis 70 Masse% Ethylen und 80 bis 30 Masse% Propylen und/oder einem α-Olefin der allgemeinen Formel CH 2 =CHR, wobei R ein linearer oder verzweigter Alkylrest mit 2 bis 8 Kohlenstoffatomen ist.
- 7Verfahren zur Herstellung thermoplastischer Elastomerer hoher Festigkeit, Elastizität und guter Einfärbbarkeit, deren eingelagerte Elastomerpartikel einen mittleren Partikeldurchmesser von 0,05 bis 5 µm, bevorzugt 0,1 bis 1 µm, haben, aus Propylen-Homopolymeren und/oder Propylen-Copolymeren, elastomeren C 2 -C 8 -Olefin-Co- und/oder -Terpolymeren, mehrfunktionell ungesättigten Monomeren, gegebenenfalls thermisch zerfallenden Radikalbildnern und Hilfsstoffen, dadurch gekennzeichnet, daß Mischungen aus 20 bis 80 Masse%, bevorzugt 40 bis 60 Masse%, Propylen-Homopolymeren und/oder Propylen-Copolymeren, 80 bis 20 Masse%, bevorzugt 60 bis 40 Masse%, elastomeren C 2 -C 8 -Olefin-Co- und/oder -Terpolymeren, 0,10 bis 4,0 Masse%, bevorzugt 0,2 bis 1,5 Masse%, bezogen auf die Summe der eingesetzten Polymere, leichtflüchtigen C 4 -C 7 -Dienen und 0 bis 4,0 Masse%, bevorzugt 0,2 bis 1,5 Masse%, bezogen auf die Summe der eingesetzten Polymere, Acylperoxiden, Alkylperoxiden, Hydroperoxiden, Peroxycarbonaten, Perestern, Ketonperoxiden, Peroxiketalen und/oder Azoverbindungen als thermisch zerfallende Radikalbildner in kontinuierlichen Knetern in der Schmelze bei Massetemperaturen von 150 bis 300°C, bevorzugt von 185 bis 245°C, und Verweilzeiten von 1 min bis 35 min, bevorzugt 2,5 bis 6 min, umgesetzt werden, wobei vor und/oder nach der Umsetzung 0,01 bis 40 Masse%, bezogen auf die Summe der eingesetzten Polymere, Hilfsstoffe zugesetzt werden können.
- 8Verfahren zur Herstellung thermoplastischer Elastomerer nach Anspruch 7, dadurch gekennzeichnet, daß die leichtflüchtigen C 4 -C 7 -Diene und/oder Acylperoxide, Alkylperoxide, Hydroperoxide, Peroxycarbonate, Perester, Ketonperoxide, Peroxiketale und/oder Azoverbindungen als thermisch zerfallende Radikalbildner im kontinuierlichen Kneter in die Schmelze der Mischung aus Propylen-Homopolymeren und/oder Propylen-Copolymeren, elastomeren C 2 -C 8 -Olefin - Co- und/oder -Terpolymeren und gegebenenfalls Hilfsstoffen leichtflüchtigen C 4 -C 7 -Dienen und/oder thermisch zerfallenden Radikalbildnern dosiert werden.
- 9Verfahren zur Herstellung thermoplastischer Elastomerer nach Anspruch 7, dadurch gekennzeichnet, daß die Mischung der Propylen-Homopolymeren und/oder Propylen-Copolymeren, elastomeren C 2 -C 8 -Olefin -Co- und/oder -Terpolymeren und gegebenenfalls Hilfsstoffe mit den leichtflüchtigen C 4 -C 7 -Dienen und/oder thermisch zerfallenden Radikalbildnern durch Vormischung und/oder durch Sorption aus Gasphase in kontinuierlichen Durchflußmischern vor Dosierung der Mischungen in den kontinuierlichen Kneter erfolgt.
- 10Verwendung von thermoplastischen Elastomeren nach einem oder mehreren der Ansprüche 1 bis 6 sowie von Mischungen der thermoplastischen Elastomeren mit üblichen Polyolefinen in der Fahrzeugindustrie, bevorzugt für Schlauchverbinder, Luftansaugkanäle, Rohrmuffen und Dichtungsprofile, in der Haushaltsgeräteindustrie, bevorzugt für Verbinder und Dichtungsprofile, auf dem Bausektor, bevorzugt für Fensterabdichtungen, Dichtungsprofile für Zwischenwände, Dehnungsfugen und im Installationsbereich sowie in der Medizintechnik, bevorzugt für Schläuche, Dichtungen, Spritzen und Kolben.
Independent claims10
99 paragraphs, as filed
0001The invention relates to thermoplastic elastomers of high strength, elasticity and good colorability and high impact polymer blends made therefrom, which are suitable for use in the automotive industry, the household appliance industry and in medical technology. The invention also relates to a process for the preparation of these thermoplastic elastomers.
0002Thermoplastic elastomers such as styrene-butadiene block copolymers, thermoplastic polyurethanes, polyesteramides, Polyätheramide, thermoplastic copolyester elastomers and polyolefin alloys with elastomers are known [Rader, C., Kunststoffe 83 (1993) 10, 777-781; Plastics 86 (1996) 12, 1845-1851].
0003The particular advantage of polyolefin alloys with elastomers as thermoplastic elastomers is the easy processability and low recyclability of these products.
0004Decisive for the material properties of thermoplastic elastomers based on polyolefin alloys with elastomers such as strength and elasticity are the composition of the polyolefin and the elastomeric component and the distribution of the elastomeric component in the polyolefin (Moore, P., Polypropylene Handbook, Carl Hanser Verlag Munich 1996, 218- 225).
0005Known Elastkomponenten for thermoplastic elastomers based on polypropylene, ethylene-propylene elastomers (EP 672,712; EP 614,940), ethylene-propylene-diene elastomers (EP 547843; EP 409542), ethylene-vinyl acetate copolymers [BE 899,507; Coran, A. Rubber Chem. Technol. 54 (1981), 892], chlorosulfonated polyethylene (US 41 41 878), elastomeric copolymers of ethylene and C<sub>4</sub>-C<sub>8th</sub>Olefins such as elastomeric ethylene-butene copolymers, ethylene-hexene copolymers or ethylene-octene copolymers [Yamaguchi, M., J. Appl. Polymer Sci. 62 (1996), 87-97; 63 (1997), 467-474; Yu, TJ Plastic Film & Sheeting 10 (1994) 1, 539-564] and elastomeric atactic polypropylenes (EP 334 829) at levels 35 to 70% by weight based on the polyolefin.
0006It is also known, in polyolefin alloys based on polypropylene / ethylene-propylene-diene elastomers, the elastomeric component by additives such as dodecyl (DE 26 20 820), sulfur (EP 336 780) or tetrabutylthiuram (EP 376 213) to cure. However, these formulations have the disadvantage of a strong discoloration, so that semi-finished products and moldings made from these materials can only dyed black are used.
0007It is also known in the preparation of thermoplastic elastomers. by compounding of polypropylene with ethylene-propylene-diene elastomers thermally decomposing radical such as azo compounds (US 50 79 283), or peroxides (US 54 59 201; Kim, Y., Polymer Engn.Sci 35 (1995) 20, 1592-1594. ; BE 841,507) or thermally decomposing radical in combination with divinyl compounds such as divinyl pyridine (J 88067802) or divinylbenzene (US 49 12 148, EP 311 451) to use.
0008In formulations of polypropylenes and elastomeric ethylene-hexene copolymers, the modification of the blends is by electron irradiation (JP 96301927).
0009Thermoplastic elastomers are also known as ternary blends of polyethylenes, polypropylenes and ethylene-propylene-diene elastomers [EP 699,522; Kim, J. Applied Polymer Sci. 60 (1996), 2199-2206].
0010Through these formulations, thermoplastic elastomers of good dyeability and high elasticity can be obtained, requirements for high strength are not met.
0011Impact-resistant polymer blends of polyolefins and elastomers are known. Known impact-resistance of polypropylene are amorphous. Ethylene-propylene-diene elastomers [Michaeli, W., Kunststoffberater (1990) 3, 38-43; Kloos, F., Angewandte Makromolekulare Chemie 185/186 (1991), 97-108], ethylene-propylene elastomers [Kim, B., J. Applied Polymer Sci. 60 (1996), 2207-2218, J. Applied Polymer Sci. 60 (1996), 1391-1403], also in the form of reactor blends of polypropylene and ethylene-propylene rubber [Kresge, E., Macromol.Symp. 53 (1992), 173-189, brother, H., Plastics 82 (1992) 6, 499-501], butadiene-α-methyl styrene rubber [Natov, M., plastic u. Rubber 38 (1991) 3, 85 -88], styrene-butadiene block copolymers [Karger-Kocsis, J., plastics, 74 (1984), 104-107], elastomeric copolymers of ethylene and higher C<sub>4</sub>-C<sub>8th</sub>Olefins [Yu, T., ANTEC 94, 2439-2441; Meiske, L., ANTEC 96, 2001-2005] as well as elastomeric ethylene-vinyl acetate copolymers [Gupta, A., J. Applied Polymer Sci. 45 (1992), 1303-1312] in proportions of 10 to 35 wt%, based on the polyolefin.
0012The disadvantage of this non-modified blends is the limited compatibility of the impact-resistance.
0013The object of the present invention was the development of thermoplastic elastomers which simultaneously have a high strength, elasticity and easy to color, and derived extremely tough polymer blends.
0014Surprisingly, it was found that by compounding of propylene homopolymers and / or propylene copolymers with elastomers with the addition of volatile C<sub>4</sub>-C<sub>7</sub>Dienes, optionally formed in the presence of thermally decomposing radical formers, thermoplastic elastomers with a very finely dispersed distribution of the elastomeric component in the polyolefin which fulfill these requirements.
0015The object of the invention was prepared by thermoplastic elastomers high strength, elasticity and good colorability, whose embedded elastomer particles have an average particle diameter of 0.05 to 5 .mu.m, preferably 0.1 to 1 .mu.m, have, of propylene homopolymers and / or propylene copolymers elastomeric C<sub>2</sub>-C<sub>8th</sub>-Olefin co- and / or terpolymers, polyfunctional unsaturated monomers, where appropriate of thermally decomposing radical-forming agents and auxiliary materials, dissolved, wherein the thermoplastic elastomers are prepared by a process in which mixtures of 20 to 80 mass%, preferably 40 to 60 mass %, propylene homopolymers and / or propylene copolymers, 80 to 20% by mass, preferably 60 to 40 wt%, elastomeric C<sub>2</sub>-C<sub>8th</sub>Olefin copolymers and / or terpolymers, from 0.10 to 4.0 mass%, preferably 0.2 to 1.5 mass%, based on the sum of the polymers used, volatile C<sub>4</sub>-C<sub>7</sub>Dienes and from 0 to 4.0% by mass, preferably 0.2 to 1.5 mass%, based on the sum of the polymers used, acyl peroxides, alkyl peroxides, hydroperoxides, peroxycarbonates, peresters, ketone peroxides, Peroxiketalen and / or azo compounds as thermally decomposing , Free-radical formers have been reacted in the melt, and wherein before and / or after the reaction, from 0.01 to 40 mass%, based on the sum can be added to the polymers used, auxiliary agents.
0016The fine dispersion of the elastomeric component in the polyolefin component, which lies in the inventive thermoplastic elastomers in the micron range, can be determined from transmission electron micrographs.
0017The propylene homopolymers are preferred in the invention largely isotactic propylene homopolymers, in particular isotactic propylene homopolymers which have been prepared using Ziegler-Natta catalysts or metallocene catalysts. Particularly suitable are propylene homopolymers with bimodal molecular weight distribution, molecular weight average M<sub>w</sub> 500000-1500000 g / mol, number average molar weights M<sub>n</sub> 25000-100000 g / mol and M<sub>w</sub> / M<sub>n</sub> Values of 5 to 60, which were prepared in a reactor cascade.
0018are preferred for the thermoplastic elastomers of the invention also copolymers of propylene and α-olefins having 2 or 4 to 18 carbon atoms, in particular statistical propylene copolymers, propylene block copolymers and / or random propylene block copolymers.
0019A preferred variant as propylene homopolymers and / or propylene copolymers for the inventive thermoplastic elastomers also form mixtures of 50 to 98% by mass of largely isotactic propylene homopolymers and / or copolymers of propylene and α-olefins having 2 or 4 to 18 carbon atoms and 2 to 50 mass% of non-isotactic propylene homopolymers, substantially amorphous propylene homopolymers and / or propylene copolymers and / or non-linear modified propylene homopolymers and / or propylene copolymers.
0020The non-isotactic propylene homopolymers, which can optionally be included in the thermoplastic elastomers of the invention are elastomeric high molecular weight propylene homopolymer with a melting point of 145 to 165 ° C, a melt viscosity of 200000-2000000 cps at 190 ° C, a heat of crystallization 4-10 cal / g and a soluble portion in diethyl ether of 35 mass% to 55 mass%. Examples of these non-isotactic propylene homopolymers are the products described in EP 475 307 or EP 475 308.
0021The largely amorphous propylene homopolymers and / or propylene copolymers, which may optionally be included in the thermoplastic elastomers according to the invention, having a proportion of crystalline polypropylene or crystalline propylene copolymer with 10 mass%, a heat of fusion less than 40 J / g and a melt index of 0.1 to 100 g / 10 min at 230 ° C / 2.16 kg, the largely amorphous polypropylene is a homopolymer of propylene and / or a copolymer of propylene of at least 80 mol% propylene and at most 20 mole% of one or a plurality of α-olefins of the formula CH<sub>2</sub>= CHR, since R is a linear or branched alkyl radical having 2 to 8 carbon atoms. These amorphous propylene homopolymers and / or propylene copolymers to particular stereo block - propylene homopolymers and / or propylene copolymers, for example, using highly active, metal-Supported Ziegler-Natta catalysts [Collette, J., Macromolecules 22 (1989) , 3851-3858; DE 2830160] or soluble Ziegler-Natta catalysts [de Candia, F., Makromol. Chem. 189 (1988), 815-821], optionally with subsequent reactive modification (EP 636863) and / or degradation (EP 640 850), can be produced.
0022The non-linear modified propylene homopolymers and / or propylene copolymers, which can optionally be included in the thermoplastic elastomers of the present invention have melt indices of 0.1 to 30 g / 10 min at 230 ° C / 2, 16 kg and a quotient of the intrinsic viscosity of the non-linear modified propylene homopolymers and / or propylene copolymer and the intrinsic viscosity of the linear propylene homopolymer and / or propylene copolymers with largely the same weight average molecular weight from 0.20 to 0.99. These non-linear modified propylene homopolymers and / or propylene copolymers are produced by radical coupling reactions (modification of propylene homopolymer and / or propylene copolymers with ionizing radiation or thermally decomposing radical formers, optionally with the addition of multifunctional, ethylenically unsaturated monomers) or by polymer-analogous reactions functionalized propylene homopolymers and / or propylene copolymers produced.
0023Examples of these produced by radical coupling reactions nonlinear modified propylene homopolymers and / or propylene copolymers are in particular: <ul><li>modified propylene homopolymers and / or propylene copolymers by reaction of propylene homopolymers and / or propylene copolymers with Bismaleimidoverbindungen in the melt (EP 574 801; EP 574 804),</li><li>modified Propyien-Homopoiymere and / or propylene copolymers by treating propylene homopolymers and / or propylene copolymer. ionizing radiation in the solid phase (EP 190889; EP 634 454),</li><li>modified propylene homopolymers and / or propylene copolymers by treating propylene homopolymers and / or propylene copolymers with peroxides in the solid phase (EP 384431; DE 4,340,194) or in the melt (EP 142 724),</li><li>modified propylene homopolymers and / or propylene copolymers by treating propylene homopolymers and / or propylene copolymers with multifunctional, ethylenically unsaturated monomers under the action of ionizing radiation (EP 678 527);</li><li>modified propylene homopolymers and / or propylene copolymers by treating propylene homopolymers and / or propylene copolymers with multifunctional, ethylenically unsaturated monomers in the presence of peroxides in the melt (EP 688 817; EP 450 342).</li></ul>
0024Furthermore, as non-linear modified propylene homopolymers and / or propylene copolymers, which may optionally be included in the thermoplastic elastomers according to the invention, containing by polymer-analogous reaction of functionalized propylene homopolymers and / or propylene copolymers, preferably of acid and / or acid anhydride propylene homopolymers and / or propylene copolymers, opposite with polyfunctional compounds reactivity, preferably with C<sub>2-</sub> -C<sub>16</sub> - Diamines and / or C<sub>2-</sub> -C<sub>16</sub> - Diols, nonlinear modified propylene homopolymers produced and / or propylene copolymers are preferred.
0025Examples of the non-linear modified propylene homopolymers and / or propylene copolymers produced by polymer-analogous reactions are in particular:<ul><li>modified propylene homopolymers and / or propylene copolymers by reacting maleic anhydride-grafted propylene homopolymer and / or propylene copolymers with diamines or polyglycols (EP 177401; JP 08176365)</li><li>modified propylene homopolymers and / or propylene copolymers by reaction of acid or acid anhydride containing propylene homopolymer and / or propylene copolymers with epoxy, hydroxyl or amino-containing polymers (EP 307684; EP 299 486).</li></ul>
0026A further preferred variant for non-linear modified propylene homopolymers and / or propylene copolymers, which may optionally be included in the thermoplastic elastomers of the invention are non-linear modified propylene homopolymers and / or propylene copolymers and by hydrolytic condensation of propylene homopolymer / or propylene copolymers which contain hydrolysable silane groups can be manufactured. Examples are the products described in DE 4107635 or US 47 14 716th
0027Particularly advantageously provide the propylene homopolymers and / or propylene copolymers of the inventive thermoplastic elastomers a multicomponent mixture of largely isotactic propylene homopolymers and / or copolymers of propylene and ethylene or α-olefins having 4 to 18 carbon atoms, non-isotactic propylene homopolymers, substantially amorphous propylene homopolymers and / or propylene copolymers and nonlinear modified propylene homopolymers and / or propylene copolymers are.
0028By using special multi-component mixtures of the polypropylenes described and propylene copolymers specific combinations of properties of the thermoplastic elastomers of the invention are achievable.
0029are preferred as propylene copolymers in the thermoplastic elastomers of the invention are also blends of<sl><li>a) 60 to 98% by weight of a crystalline copolymer of 85 to 99.5% of propylene and 15 to 0.5 wt% of ethylene and / or an α-olefin of the formula CH<sub>2</sub>= CHR, wherein R is a linear or branched alkyl radical having 2 to 8 carbon atoms, and</li><li>b) 2 to 40% by weight of an elastic copolymer of 20 to 70 mass% of ethylene and 80 to 30% propylene and / or an α-olefin of the formula CH<sub>2</sub>= CHR, wherein R is a linear or branched alkyl radical having 2 to 8 carbon atoms.</li></sl>
0030These polyolefin blends of crystalline copolymers and elastic copolymers are, for example, the polymer mixtures described in EP 400 333 or EP 472 946.
0031The elastomeric C contained in the thermoplastic elastomers of the invention<sub>2</sub>-C<sub>8th</sub>-Olefin co- and / or terpolymers are preferably ethylene-propylene elastomers, ethylene-propylene-diene elastomers, ethylene-vinyl acetate Copolyere, chlorosulfonated polyethylene, ethylene-styrene elastomers, elastomeric copolymers of ethylene and C<sub>4</sub>-C<sub>8th</sub>Olefins - in particular, elastomeric ethylene-butene copolymers, ethylene-hexene copolymers and / or ethylene-octene copolymers -, elastomeric butadiene-styrene co- and / or terpolymers - in particular styrene-ethylene-butadiene-styrene block copolymers - , and / or styrene-isoprene co- and / or terpolymers.
0032The and the mixtures of propylene homopolymers and / or propylene copolymer elastomeric C<sub>2</sub>-C<sub>8th</sub>Olefin copolymers and / or terpolymers unreacted volatile C<sub>4</sub>-C<sub>7</sub>Dienes are preferably butadiene, chloroprene, cyclohexadiene, cyclopentadiene, dimethylbutadiene, heptadiene, hexadiene, isoprene and / or 1,4-pentadiene.
0033The excipients contained in the thermoplastic elastomers according to the invention are preferably 0.01 to 2.5 wt% stabilizers, 0.05 to 2.0 mass% nucleating agent, 0.1 to 1% by weight of antistats, 0.2 to 3% pigments, 3 to 40% by weight fillers, 1 to 20 mass% flame retardant, 3 to 40 mass% reinforcing materials and / or from 0.01 to 5 mass%, in each case based on the sum of the polymers used, processing aids.
0034The stabilizers contained in the thermoplastic elastomer of the invention preferably are mixtures of 0.01 to 0.6% of phenolic antioxidants, 0.01 to 0.6% 3-arylbenzofuranones, 0.01 to 0.6% processing stabilizers based on phosphites, 0.01 to 0.6% high temperature stabilizers based on disulfides and thioethers and / or 0.01 to 0.8 wt% sterically hindered amines (HALS).
0035Suitable phenolic antioxidants are 2-tert-butyl-4,6-dimethylphenol, 2,6-ditert-butyl-4-methylphenol, 2,6-di-tert-butyl-4-isoamylphenol, 2,6-di-tert .butyl-4-ethylphenol, 2-tert-butyl-4,6-diisopropylphenol, 2,6-dicyclopentyl-4-methylphenol, 2,6-di-tert-butyl-4-methoxymethylphenol, 2-t-butyl 4,6-dioctadecylphenol, 2,5-di-tert-butylhydroquinone, 2,6-di-tert-butyl-4,4-hexadecyloxyphenol, 2,2'-methylenebis (6-tert-butyl-4-methylphenol), 4,4'-thio-bis- (6-tert-butyl-2-methylphenol), 3 (3,5-ditert-butyl - 4 - hydroxyphenyl) propionate, 1,3,5 - trimethyl - 2,4,6 tris (3 '5'DI-tert-butyl-4-hydroxybenzyl,) benzene and / or pentaerythritol tetrakis [3- (3,5-di-tert-butyl-4-hydroxyphenyl)] propionate.
0036As benzofuranone derivative is in particular 5,7-di-tert-butyl-3- (3,4-di-methylphenyl) -3H-benzofuran-2-one suitable.
0037As HALS compounds, bis-2,2,6,6-tetramethyl-4-piperidyl sebacate and / or poly - ([1,1,3,3, -tetramethylbutyl) imino] - 1,3,5-triazine - particularly suitable.
0038The nucleating agents optionally contained in the thermoplastic elastomers of the invention are preferably α-nucleating agents such as talc, sodium benzoate or the sodium salt of methylene-bis (2,4-di-Bu-butylphenol) phosphoric acid or β-nucleating agent such as adipic acid, adipic dianilide, Chinacridinonchinon and / or N, N'-dicyclododecyl-4,4-biphenyldicarboxamide.
0039The fillers may be present in the thermoplastic elastomers of the invention are preferably Al<sub>2</sub>O<sub>3,</sub> Al (OH)<sub>3,</sub> Barium sulfate, calcium carbonate, glass beads, wood flour, siliceous earth, hollow microbeads, carbon black, talc and / or wollastonite.
0040The reinforcing materials may be present in the thermoplastic elastomers of the invention are preferably aramid fibers, cellulose fibers, flax, jute, kenaf, glass fibers, glass mats, micro fibers of liquid crystalline polymers and / or polytetrafluoroethylene fibers.
0041As a processing aid, calcium stearate, magnesium stearate and / or waxes can be included in the thermoplastic elastomers of the invention.
0042According to the invention further high-impact polymer blends consisting of<sl><li>a) 5 to 95 mass%, preferably 10 to 50 mass%, and of thermoplastic elastomers according to one or more of claims 1 to 5 </li><li>b) 95 to 5% by weight, preferably 90 to 50 mass%, to<sl><li>b1) unmodified polyolefins, preferably of mostly isotactic propylene homopolymers, copolymers of propylene and ethylene or α-olefins with 4 to 18 C-atoms, in particular statistical propylene copolymers, propylene block copolymers and / or statistical propylene block copolymers; non-isotactic propylene homopolymers, substantially amorphous propylene homopolymers and / or propylene copolymers, non-linear propylene homopolymer and / or propylene copolymers, and / or</li><li>b2) blends of<sl><li>b2.1) from 60 to 98 mass% of a crystalline copolymer of 85 to 99.5% of propylene and 15 to 0.5 wt% of ethylene and / or an α-olefin of the formula CH<sub>2</sub>= CHR, wherein R is a linear or branched alkyl radical having 2 to 8 carbon atoms,</li><li>b2.2) from 2 to 40 mass% of an elastic copolymer of 20 to 70 mass% of ethylene and 80 to 30% propylene and / or an α-olefin of the formula CH<sub>2</sub>= CHR, wherein R is a linear or branched alkyl radical having 2 to. 8 carbon atoms, exist:</li></sl></li></sl></li></sl>
0043The unmodified polyolefin in the high impact polymer blends according to the invention preferably consist of those propylene homopolymers and / or propylene copolymers, which are also part of the thermoplastic elastomers.
0044The thermoplastic elastomers of high strength, elasticity and good colorability, whose embedded elastomer particles have an average particle diameter of 0.05 to 5 .mu.m, preferably 0.1 to 1 to have, of propylene homopolymers and / or propylene copolymers, elastomeric C<sub>2</sub>-C<sub>8th</sub>Olefin copolymers and / or terpolymers, multifunctional unsaturated monomers, optionally thermally decomposing radical formers and adjuvants, are prepared according to the invention by a process in which mixtures of 20 to 80% by mass, preferably 40 to 60 mass%, propylene homopolymer and / or propylene copolymers, 80 to 20% by mass, preferably 60 to 40 wt%, elastomeric C<sub>2</sub>-C<sub>8th</sub>Olefin copolymers and / or - terpolymer, 0.10 to 4.0 mass%, preferably 0.2 to 1.5 mass%, based on the sum of the polymers used, volatile C<sub>4</sub>-C<sub>7</sub>Dienes and from 0 to 4.0% by mass, preferably 0.2 to 1.5 mass%, based on the sum of the polymers used, acyl peroxides, alkyl peroxides, hydroperoxides, peroxycarbonates, peresters, ketone peroxides, Peroxiketalen and / or azo compounds as thermally decomposing radical generator in continuous kneaders in the melt at temperatures between 150 to 300 ° C, preferably 185-245 ° C, and residence times of 1 min to 35 min, preferably 2.5 to 6 minutes, to be implemented, wherein before and / or after the implementation of 0.01 to 40 mass%, based on the sum of the polymers used, auxiliaries can be added.
0045As thermally decomposing radical thermoplastic elastomers acyl, alkyl, hydroperoxides, peroxy, perester, ketone peroxides, peroxy and / or azo compounds are used in the method for producing the invention.
0046Examples of the acyl peroxides used are benzoyl peroxide, chlorobenzoyl, methoxybenzoyl, methylbenzoyl, Nitrobenzoylperoxid, Acetylbenzoylperoxid, lauroyl or Succinoylperoxid.
0047Examples of the alkyl peroxides used are allyl-butyl peroxide, 2,2-bis (tert.butylperoxybutan), 1,1-bis (tert.butylperoxi -) - 3,3,5-trimethylcyclohexane, diisopropylaminomethyl-tert.amylperoxid , dimethylaminomethyl tert.amylperoxid, diethyl aminomethyl-butyl peroxide, dimethylaminomethyl-butyl peroxide, 1,1-di- (tert. amylperoxi) cyclohexane, tert. Amyl peroxide, tert.Butylcumylperoxid, tert-butyl peroxide and 1-hydroxybutyl n-butyl peroxide.
0048Examples of the hydroperoxides used are decalin hydroperoxide and tetralin.
0049Examples of peresters and peroxycarbonates employed are butyl peracetate, Cumylperacetat, Cumylperpropionat, Cycloherylperacetat, di-tert.butylperadipat, Ditert.butylperazelat, di-tert.butylperglutarat, di-tert.butylperphthalat, di-tert.butylpersebazat, 4-Nitrocumylperpropionat, 1- Phenylethylperbenzoat, Phenylethylnitroperbenzoat, tert-bicyclo- (2,2,1) heptanpercarboxylat, tert. Butyl-4-carbomethoxyperbutyrat, tert.Butylcyclobutanpercarboxylat, tert.Butylcyclohexylperoxycarboxylat, tert.Butylcyclopentylpercarboxylat, tert.Butylcyclopropanpercarboxylat, tert.Butyldimethylpercinnamat, tert-butyl-2- (2,2-diphenylvinyl) perbenzoate, tert-butyl-4-methoxyperbenzoat, tert .Butylperbenzoat, tert.Butylcarboxicyclohexan, tert.Butylpernaphthoat, tert.Butylperoxiisopropylcarbonat, t-butylpertoluate, tert. Butyl-1-phenylcyclopropylpercarboxylat, tertiary butyl 2-propylperpenten-2-oate, tert-butyl-1-methylcypropylpercarboxylat, tert-butyl-4-nitrophenylperacetat, tert.Butylnitrophenylperoxycarbamat, tert-butyl-N-succinimidopercarboxylat, tert.Butylpercrotonat, tert. Butylpermaleinsäure, tert.Butylpermethacrylat, tert.Butylperoctoat, tert.Butylperoxyisopropylcarbonat, tert.Butylperisobutyrat, tert.Butylperacrylat and tert.Butylperpropionat.
0050Examples of the ketone peroxides used are methyl ethyl ketone and Diethylketonhydroperoxid.
0051Examples of the peroxy used are 1.1-di-t-butylperoxy-3,3,5-trimethylcyclohexane and 1.1-di-t-butylperoxy-3,3,5-dimethylethylcyclohexan.
0052Examples of the azo compounds used are 2-cyano-2-propylazoformamid, 2,2'-azo-bis-2-methylpropionitrile, 1,1'-azo-bis-cyclopentannitril, 1,1'-azo-bis-cyclohexanenitrile, 2 , 2'-azo-bis-cyclohexylpropionitril; 2,2'-azo-bis-methyl-2-methyl propionate and azobis (N, N'-diethylenisobutyramidin).
0053As the continuous kneader, in particular twin screw extruders, single screw extruder high mixing effect, or a cascade of coupled kneading chambers are useful in the process for preparing thermoplastic elastomers according to the invention.
0054A preferred variant for the dosage of volatile C<sub>4</sub>-C<sub>7</sub>-dienes And / or acyl peroxides, alkyl peroxides, hydroperoxides, peroxycarbonates, peresters, ketone peroxides, peroxyketals and / or azo compounds as thermally decomposing radical formers in the process for the preparation of thermoplastic elastomers, is according to the invention is that the dosage in the continuous kneader into the melt of the mixture of propylene homopolymers and / or propylene copolymers, elastomeric C<sub>2</sub>-C<sub>8th</sub>Olefin - copolymers and / or terpolymers and optionally excipients, volatile C<sub>4</sub>-C<sub>7</sub>carried dienes and / or thermally decomposing radical formers.
0055A preferred variant for the preparation of mixtures of propylene homopolymers and / or propylene copolymers, elastomeric C<sub>2</sub>-C<sub>8th</sub>Olefin -CO- and / or terpolymers and optionally auxiliaries volatile C<sub>4</sub>-C<sub>7</sub>Dienes and / or acyl peroxides, alkyl peroxides, hydroperoxides and / or peresters as thermally decomposing free radical in the process for producing thermoplastic elastomers is also inventively in that the mixture of propylene homopolymers and / or propylene copolymer elastomeric, C<sub>2</sub>-C<sub>8th</sub>Olefin copolymers and / or terpolymers and optionally auxiliaries with the volatile C<sub>4</sub>-C<sub>7</sub>Dienes and / or thermally decomposing radical formers takes place by premixing and / or sorption of gas phase in continuous flow mixers before dosing of the mixtures into the continuous kneader.
0056In the premix or sorption of thermal decomposing radical formers such acyl, alkyl, hydroperoxides, peroxy, perester, ketone peroxides, peroxy and / or azo compounds to be used, which has a half life at the melting point or softening point of the used propylene homopolymers and / or propylene copolymers s possess more than 40, in order to avoid premature decomposition before homogenization of the mixture.
0057The inventive thermoplastic elastomers, and mixtures of thermoplastic elastomers with conventional polyolefins are preferred for use in the automotive industry, especially for tubing connectors, air intake ducts, pipe sleeves and sealing profiles, in the household appliances industry, especially for connectors and sealing profiles, in the construction sector, in particular for window seals, gaskets suitable for partition walls, expansion joints and in the installation area, as well as in medical technology, in particular for hoses, seals, syringes and pistons.
0058Of Customised is rem advantage that the thermoplastic elastomers can be colored due to the opaque coloring for producing colored products in any colors.
0059The invention is illustrated by the following examples:
example 1
0060In a Werner & Pfleiderer twin-screw extruder ZSK 54, UD = 36, with 2 doses, dosing liquid media in Zone 4, vacuum degassing and underwater, temperature profile 80/170/220 // 180/220/220/210/190 ° C, is a propylene-ethylene copolymer (ethylene content 4.2% by weight, melt index 8 g / 10 min at 230 ° C / 2.16 kp) with 8.0 kg / hr. and an ethylene-octene copolymer (octene content 24% by weight, melt index 5 g / 10 min at 190 ° C / 2.16 kp) at 12.0 kg / hr. metered. The mixture is melted in an extruder and in the zone 4 of the extruder, a mixture of 32% by weight of isoprene, 18% by weight of 2,5-dimethyl-2,5-di (tert.butylperoxyhexan) and 50 mass% of acetone with 0.6 kg /Hours. metered. The reaction mixture is subjected to a vacuum degassing discharged and granulated.
0061The resulting opaque thermoplastic elastomer has the following properties: tension [N / mm<sup>2</sup>] At break [%]: 7.5 / 200; 9/400; 13.5 / 600; Tension: 25%
example 2
0062In a Werner & Pfleiderer twin screw extruder of Example 1, a propylene-ethylene random copolymer according to Example 1 with 10.0 kg / hr. and an ethylene-octene copolymer of Example 1 with 10.0 kg / hr. metered. The mixture is melted in an extruder and in the zone 4 of the extruder, a mixture of 40% by weight of butadiene, 10% by weight of dicumyl peroxide and 50% by weight of acetone at 0.65 kg / hr. metered. The reaction mixture is subjected to a vacuum degassing discharged and granulated.
0063The resulting opaque thermoplastic elastomer has the following properties: tension [N / mm<sup>2</sup>] At break [%]: 8.2 / 200; 10.2 / 400; 15.5 / 600; Tension set: 30%
0064As comparison has the without the addition of the mixture of butadiene, dicumyl peroxide and acetone produced under the same conditions thermoplastic elastomer has a tensile strength of 9 N / mm<sup>2</sup> with an elongation at break of 42%.
0065A manufactured under the same experimental conditions without the addition of butadiene thermoplastic elastomer has the following properties: tensile strength [N / mm<sup>2</sup>] At break [%]: 7.3 / 200; 8.1 / 400; 10.8 / 600; Tension set: 29%.
example 3
0066In a Werner & Pfleiderer twin-screw extruder of Example 1, temperature profile 80/170/230 // 190/230/230/220/190 ° C, a polypropylene compound, which consists of 99.3% by weight of a reactor blend (ethylene content 33 mol%, melt index 8 g / 10 min at 230 ° C / 2.16 kg), consisting of a crystalline propylene-ethylene copolymer and an elastic ethylene-propylene copolymer, 0.35% by mass of 2-tert-butyl-4,6-diisopropylphenol, 0.15 mass% of bis-2,2,6,6 - tetramethyl-4-piperidyl sebacate and 0.2% by weight of calcium palmitate with 8.0 kg / hr. and an ethylene-octene copolymer of Example 1 with 12 kg / h. metered. The mixture is melted in an extruder and in the zone 4 of the extruder, a mixture of 15% by weight of butadiene, 10% by weight of dimethyl, 15 mass% 1-Phenylethylperbenzoat, 10 mass% of dicumyl peroxide and 50% by weight of acetone with 0.55 kg / h. metered. The reaction mixture is subjected to a vacuum degassing discharged and granulated.
0067The resulting opaque thermoplastic elastomer has the following properties: tension [N / mm<sup>2</sup>] At break [%]: 6.5 / 200; 8.8 / 400; 12.5 / 600; Tension 16.25%
0068As a comparison has the without the addition of the mixture of diene monomer, thermally decomposing radical formers and acetone thermoplastic elastomer produced under the same conditions the following properties: tensile strength [N / mm<sup>2</sup>] At break [%]: 2.8 / 200; 3.0 / 400; 3.6 / 600; Tension: 23.8%
0069A manufactured under the same experimental conditions without the addition of diene thermoplastic elastomer has the following properties tensile stress [N / mm<sup>2</sup>] At break [%] 5.0 / 200; 6.5 / 400; 7.7 / 600; Tension: 21.2%.
example 4
0070In a Werner & Pfleiderer twin-screw extruder of Example 1 with 3 feeders, temperature profile 80/175/220 // 190/230/230/220/190 ° C, a polypropylene compound of Example 3 with 7.0 kg / hr., A non-linear modified propylene homopolymer (melt index 1.9 g / 10 min at 230 ° C kp / 2.16, butadiene 0.9 mass%, intrinsic viscosity of the non-linear modified propylene homopolymer / intrinsic viscosity of the unmodified propylene homopolymer 0.82) with 1, 2 kg / hr. and an ethylene-octene copolymer of Example 1 with 12 kg / h. metered. The mixture is melted in an extruder and in the zone 4 of the extruder, a mixture of 15% by weight of isoprene, 10% by weight of cyclopentadiene, 15% by weight of t-butylpertoluate, 10 mass% tert. Cumyl and 50 mass% of acetone with 0.35 kg / h. metered. The reaction mixture is subjected to a vacuum degassing discharged and granulated.
0071The resulting opaque thermoplastic elastomer has the following properties: tension [N / mm<sup>2</sup>] At break [%] 6.9 / 200; 8.3 / 400; 11.2 / 600; Tension: 15.25%
0072As a comparison has the without the addition of the mixture of diene monomer, thermally decomposing radical formers and acetone thermoplastic elastomer produced under the same conditions the following properties: tensile strength [N / mm<sup>2</sup>] At break [%]: 3.3 / 200; 3.5 / 400; 3.6 / 600; Tension: 23.8%
0073A manufactured under the same experimental conditions without the addition of diene thermoplastic elastomer has the following properties: tensile strength [N / mm<sup>2</sup>] At break [%]: 4.7 / 200; 5.9 / 400; 6.8 / 600; Tension: 22.2%.
example 5
0074In a Werner & Pfleiderer twin-screw extruder of Example 1 with 2 feeders, temperature profile 80/175/220 // 190/225/230/220/190 ° C, a polypropylene compound of Example 3 with 8.0 kg / hr. and a talc-powdered ethylene-propylene-ethylidenenorbornene terpolymer (melt index 0.5 g / 10 min at 230 ° C / 2.16 kp, propylene content 24 mass%, 2.5 double bonds per 1000 carbon atoms) with 12 kg / hours metered. The mixture is melted in an extruder and in the zone 4 of the extruder, a mixture of 10% by weight of butadiene, 5% by weight hexadiene, 5 mass% Diethylketonhydroperoxid, 25 mass% of dicumyl peroxide and 55% by weight of acetone 0.62 kg / hr. metered. The reaction mixture is subjected to a vacuum degassing discharged and granulated.
0075The resulting opaque thermoplastic elastomer has the following properties: tension [N / mm<sup>2</sup>] At break [%]: 8.5 / 200; 13.2 / 400; Tension 18.7%
0076As a comparison has the without the addition of the mixture of diene monomer, thermally decomposing radical formers and acetone thermoplastic elastomer produced under the same conditions the following properties: tensile strength [N / mm<sup>2</sup>] At break [%]: 3.1 / 200; 3.8 / 400; Tension: 25.0%
0077A manufactured under the same experimental conditions without the addition of diene thermoplastic elastomer has the following properties: tensile strength [N / mm<sup>2</sup>] At break [%]: 5.5 / 200; 7.4 / 400; Tension: 18.5%.
example 6
0078In a Werner & Pfleiderer twin-screw extruder of Example 1 with 2 feeders, temperature profile 80/175/220 // 190/225/230/220/190 ° C, a polypropylene compound of Example 3 with 10.0 kg / h. and a talc-powdered ethylene-propylene-ethylidenenorbornene terpolymer according to Example 5 with 10.0 kg / hr. metered. The mixture is melted in an extruder and in the zone 4 of the extruder, a mixture of 20 mass% isoprene, 5% by weight hexadiene, 5 mass% decalin hydroperoxide, 20% by weight of dicumyl peroxide and 50% by weight of acetone 0.60 kg / hr. metered. The reaction mixture is subjected to a vacuum degassing discharged and granulated.
0079The resulting opaque thermoplastic elastomer has the following properties: tension [N / mm<sup>2</sup>] At break [%]: 8.0 / 200; 12.5 / 400; Tension 22.5%
0080As a comparison has the without the addition of the mixture of diene monomer, thermally decomposing radical formers and acetone thermoplastic elastomer produced under the same conditions the following properties: tensile strength [N / mm<sup>2</sup>] At break [%] 4.8 / 200; 7.7 / 400; Tension 25.0%
0081A manufactured under the same experimental conditions without the addition of diene thermoplastic elastomer has the following properties: tensile strength [N / mm<sup>2</sup>] At break [%]: 6.1 / 200; 8.5 / 400; Tension: 26.4%.
example 7
0082In a continuous flow mixer is a mixture of 40% by weight of a powdery ethylene-propylene copolymer (ethylene content 4.2% by weight, melt index 8 g / 10 min at 230 ° C / 2, 16 kg) and 60 mass% of a finely divided, talcum powdered ethylene-propylene-ethylidenenorbornene terpolymer (melt index 0.6 g / 10 min at 230 ° C / 2.16 kp, propylene content 26 mass%, 3 double bonds per 1000 carbon atoms) 2% by weight based on the polymer mixture , a 25% solution of 2,5-dimethyl-2,5-di (tert.butylperoxyhexan) reeled in acetone. Then charged with the thermally decomposing free radical polymer mixture is transferred to a continuous screw mixer with a residence time of 12 min at 45 ° C in contact with a recycle gas, the% nitrogen consists of 28 vol.% Of butadiene and 72 vol., 1.1 .% by weight of butadiene, based on the polymer mixture, loaded sorption. After metering in a Berstorff twin screw extruder Z 25 is loaded with thermally decomposing free radical diene polymer mixture at 250 rev / min, a flow rate of 5 kg / h and a temperature profile of 25/165/160/160/175/190/230 / 235/240/240 ° C melted and homogenized, discharged and granulated.
0083The resulting opaque thermoplastic elastomer has the following characteristics: Melt index: 0.06 g / 10 min at 230 ° C kp / 2.16 heat of fusion: 63 J / g Crystallization temperature: 378 K tension [N / mm<sup>2</sup>] At break [%]: 7.5 / 200, 11.2 / 400, 25.1 / 600 Tension: 21%
0084For comparison, the polymer blend prepared without pretreatment with thermally decomposing free radical Dien Alike has the following characteristics: melt index 0.86 g / 10 min kgf at 230 ° C / 2.16 heat of fusion: 47 J / g Crystallization temperature 372 K tension [N / mm<sup>2</sup>] At break [%]: 3.1 / 200, 4.2 / 400, 5.4 / 600 Tension set: 21%
0085The polymer mixture produced under the same conditions under premix with thermally decomposing free radical, but without Diensorption in continuous screw mixer has comparison, the following characteristics: melt index 0.15 g / 10 min kgf at 230 ° C / 2.16 heat of fusion: 68 J / g Crystallization temperature 373K tension [N / mm<sup>2</sup>] At break [%]: 7.9 / 200, 9.8 / 400, 14.9 / 600% Tension set 21
example 8
0086In a continuous flow mixer is a mixture of 40% by weight of a powdery ethylene-propylene copolymer (ethylene content 4.2% by weight, melt index 8 g / 10 min at 230 ° C / 2.16 kp) and 60% by weight of a finely divided, talcum powdered ethylene-propylene-ethylidenenorbornene terpolymer (melt index 0.6 g / 10 min at 230 ° C / 2.16 kp, propylene content 28 mass%, 3 double bonds per 1000 carbon atoms) 2% by weight based on the polymer mixture , a 25% solution of 1,1-di (t-butylperoxy) -3,3,5-trimethylcyclohexane reeled in acetone. Then charged with the thermally decomposing free radical polymer mixture is transferred to a continuous screw mixer and% nitrogen is at a residence time of 8 min at 45 ° C in contact with a recycle gas consisting of 32 vol.% Isoprene and 68 vol., 0.7 . wt% isoprene, based on the polymer mixture, loaded sorption. After metering in a Berstorff twin screw extruder Z 25 is loaded with thermally decomposing free radical diene polymer mixture at 250 rev / min, a flow rate of 5.2 kg / h and a temperature profile of 25/165/160/160/175/185 / 225/230/240/235 ° C melted and homogenized, discharged and granulated.
0087The resulting opaque thermoplastic elastomer has the following characteristics: Melt index: 0.06 g / 10 min at 230 ° C kp / 2.16 heat of fusion: 64 J / g Crystallization temperature: 376 K tension [N / mm<sup>2</sup>] At break [%]: 6.9 / 200, 11.0 / 400, 20.7 / 600 Tension set: 25%
example 9
0088In an extruder according to Example 7 is a polymer blend of 70% by weight of a polypropylene homopolymer (melt index 1.9 g / 10 min at 230 ° C / 2.16 kp) and 30% by weight of the thermoplastic elastomer of Example 7 at 250 U / min, a flow rate of 5 kg / h and a temperature profile of 25/215/215/215/215/215/215/220 ° C melted and homogenized, discharged and granulated.
0089The resulting impact modified polypropylene has the following properties: tension [N / mm<sup>2</sup>] At break [%]: 20.3 / 200, 21.0 / 400, 22.8 / 600 notched Charpy impact strength [kJ / m<sup>2</sup>] At [° C]: 43/20, 4.8 / -20, 2.4 / -40
0090As a comparison has a manufactured under the same homogenization conditions impact modified polypropylene, which was made of 70 wt% of the polypropylene homopolymer and 30% by weight of the corresponding non-modified propylene polymer / elastomer mixture according to Example 7, the following properties: tensile strength [N / mm<sup>2</sup>] At break [%]: 19.4 / 200, 20.0 / 400, 22.7 / 600 notched Charpy impact strength [kJ / m<sup>2</sup>] At [° C]: 10.5 / 20, 3.2 / -20, 2.0 / -40
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Numbers
- Publication
- 0915134
- Application
- 981207905
Titles3
- German
- Thermoplastische Elastomere hoher Festigkeit, Elastizität und guter Einfärbbarkeit und daraus hergestellte hochschlagzähe Polymerblends
- English
- Thermoplastic elastomer with high resistance, elasticity and good paintability and high impact resistant polymer blends prepared therefrom
- French
- Elastomère thermoplastique avec une grande résistance, élasticité et bonne affinité pour les colorants ainsi que comme mélanges de polymères résistants à l'impact préparés à partir de celui-ci
Classification
- CPC, 7
- C08L51/06
- C08L23/10
- C08L23/16
- C08L53/00
- C08L2207/04
- C08L2312/02
- Y10T428/1352
- IPC, 5
- C08L23 08
- C08L23 10
- C08L23 16
- C08L51 06
- C08L53 00
Designated states13
- Contracting states, 13
- Austria
- Belgium
- Switzerland
- Germany
- Denmark
- Spain
- Finland
- France
- United Kingdom
- Italy
- Liechtenstein
- Netherlands (Kingdom of the)
- Sweden