Catalytic systems for the polymerisation and copolymerisation of alpha-olefins
Abstract
CATALYTIC COMPONENT FOR THE POLYMERIZATION OF ALPHA - OLEFINS IN SOLUTION, IN SUSPENSION, IN GASEOUS PHASE AT LOW AND HIGH PRESSURE AND TEMPERATURE OR IN MASS AT HIGH PRESSURES AND HIGH OR LOW TEMPERATURES, CHARACTERIZED BECAUSE IT IS DEFINED GENERALLY THROUGH THE II FORMULAS: , EQUAL OR DIFFERENT BETWEEN YES, HYDROGENOO REPRESENTS A RADICAL CONTAINING BETWEEN 1 AND 20 CARBON ATOMS; THIS GROUP OPTIONALLY CONTAINS HETEROATOMOS OF GROUPS 14 TO 16 OF THE PERIODIC TABLE OF THE ELEMENTS, AND BORO; AT LEAST ONE GROUP R CONTAINS AN OSIR GROUP "SUB, 3}; Q IS SELECTED FROM A GROUP THAT INCLUDES: BORO OR AN ELEMENT BELONGING TO GROUPS 14 OR 16 OF THE PERIODIC TABLE; THE VALUE OF M MAY VARY BETWEEN 1 AND 4 AND IS PREFERIBLY 1 OR 2; L, EQUAL OR DIFFERENT BETWEEN, THEY REPRESENT A CYCLICAL ORGANIC GROUP, UNITED LOVES THROUGH A PI LINK}, OR IT IS AN ATOMO BELONGING TO GROUPS 15 OR 16 OF THE PERIODIC TABLE; L SUB, 1} AND L SUB, 2}, EQUAL OR DIFFERENT BETWEEN YES, HAVE THE SAME MEANING THAT L; M IS A METAL OF GROUPS 3, 4 OR 10 OF THE PERIODIC TABLE, A LANTANIDO OR A ACTINIDO; X, EQUAL OR DIFFERENT BETWEEN, THEY ARE SELECTED FROM A GROUP THAT INCLUDES: HALOGEN, HYDROGEN, OR "'', N (R" '' SUB, 2}, RENT C SUB, 1} - C SUB, 20 } OR ARILO C SUB, 6} - C SUB, 20}; WHERE R "'' IS SELECTED FROM THE GROUP FORMED BY RENT C SUB, 1} - C SUB, 20}, CILCOALQUILO C SUB, 3} - C SUB, 20}, ARILO C SUB, 6} C SUB, 20} , C SUB RENT, 7} - C SUB, 20}, ARILALQUILO C SUB, 7} - C SUB, 20}, ARILALQUENILO OR RENT C SUB, 7} - C SUB, 20}, LINEAR OR RAMIFIED; X IS 1 OR 2, AND IS 2 OR 3 III, SO THAT X + Y = 4 D IS INCLUDED BETWEEN 0 AND 2 A, BYC ARE ENTIRELY UNDERSTANDED BETWEEN 0 AND 10, SO THAT A + B + C 1 .

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19 claims: 11 independent, 8 dependent
- 1ES 2 154 017 T3 REIVINDICACIONES 1. Compuesto catalizador de la polimerización de α - olefinas en disolución, en suspensión, en fase gaseosa a presiones y temperaturas bajas y altas o en masa a presiones altas y temperaturas altas o bajas, caracterizado porque comprende un compuesto de fóormula general I o II:I (L(R)a )x MXy (R)a | L1 /\ [(R)c -Q]m MXd II \/ L 2 | (R)b (L(R)a)xMXy en las que: R, igual o diferente a otros, es un radical que contiene entre 1 y 20 óatomos de carbono;este grupo puede contener opcionalmente heteroaótomos de los grupos 14 a 16 de la tabla perioódica de los elementos y boro, al menos un grupo R contiene un grupo OSiR”3, donde R” se selecciona del grupo que comprende: alquilo C1 C20, cicloalquilo C3 -C20, arilo C6 - C20, alquenilo C7 -C20, arilalquilo C7 -C20, arilalquenilo C7 -C20 o alquilarilo, lineal o ramificado. m puede oscilar entre 1 y 4. Q se selecciona del grupo que comprende: boro o un elemento de los grupos 14 a 16 de la tabla perióodica;cuando m 1, los grupos Q son iguales o diferentes a otros, las valencias libres de cada Q se rellenan con grupos R de acuerdo con el valor del Indice c;dos grupos R se unen de forma opcional para formar un anillo de entre 5 y 8 aótomos. L, igual o diferente a otros, es un grupo orgóanico cóclico unido a M a travóes de un enlace π, contiene un anillo ciclopentadienilo, que opcionalmente se fusiona con uno o móas anillos, o es un óatomo de los grupos 15 oó 16delatablaperióodica. L1 yL2, iguales o diferentes a otros, tienen el mismo significado que L;M es un metal de los grupos 3, 4, 10dela tabla perióodica, lantaónidos o actónidos;X, igual o diferente a otros, se selecciona entre un grupo que comprende: haloógeno, hidroógeno, OR”', N(R”')2, alquilo C1 -C20 o arilo C6 -C20, donde R”' se selecciona del grupo que comprende: alquilo C1 -C20, cicloalquilo C3 -C20, arilo C6 -C20, alquenilo C7 -C20, arilalquilo C7 -C20, arilalquenilo C7 -C20 o alquilarilo, lineal o ramificado;xes1óo2, yes2oó3deformaquex+y=4 dvade0a2;a, b y c son nuómeros enteros de 0 a 10, de forma que a + b + c 1.
- 2Compuesto catalizador seguón la reivindicacióon 1, en el que R se selecciona dentro del grupo que comprende:alquilo C1 -C20, cicloalquilo C3 -C20, arilo C6 -C20, alquenilo C7 -C20, arilalquilo C7 -C20, arilalquenilo C7 -C20 oalquilarilo, lineal o ramificado o un grupo SiR'3 en el que R' es alquilo C1 -C20, cicloalquilo C3 -C20, arilo C6 -C20, alquenilo C7 -C20, arilalquilo C7 -C20, arilalquenilo C7 -C20 o alquilarilo, lineal o ramificado o OSiR”3, en el que R” se selecciona dentro del grupo que comprende: alquilo C1 -C20, cicloalquilo C3 -C20, arilo C6 -C20, alquenilo C7 -C20, arilalquilo C7 -C20, arilalquenilo C7 -C20 o alquilarilo, lineal o ramificado;todos estos grupos pueden contener opcionalmente heteroóatomos de los grupos 14 a 16 de la tabla perióodica de los elementos y boro.
- 3Compuesto catalizador seguón las reivindicaciones 1 - 2, en el que M se selecciona del grupo que comprende Ti, Zr o Hf.
- 4Compuesto catalizador seguón las reivindicaciones 1 - 3, en el que el grupo R que contiene el grupo OSiR” se selecciona del grupo que comprende:- CH2 -CH2 - OSiMe3;- CH2 -CH2 CH2 - OSiMe3;- CH2 -O-CH2 - OSiMe3;- O -CH2 -CH2 - OSiMe3;- SiMe2 -CH2 -CH2 OSiMe3.
- 5Compuesto catalizador seguón las reivindicaciones 1 - 4, en el que, en la fóormula general I, L es ciclopentadienilo o indenilo, M es circonio, x es 2, y es 2, R es alquilo C1 -C4, en el que al menos un hidroógeno de un R se sustituye por OSiR”3 donde R” se selecciona del grupo que comprende:Me, Et, Pr.
- 6Compuesto catalizador seguón las reivindicaciones 1 - 4, en el que, en la fóormula general II, M es circonio, L1 yL2 son un grupo ciclopentadienilo o indenilo, R es un C1 -C4 alquilo en el que al menos un hidroógeno de un R se sustituye por OSiR”3 o por un grupo SiR'2 - OSiR”3, en el que R” se selecciona del grupo que comprende:metilo, etilo, propilo;[(R)cQ]m es H2C-CH2,CRH -CH2, RHC - SiR'2,R2C - SiR'2 o SiRR'.
- 7Compuesto catalizador seguón las reivindicaciones 1 - 4, en el que, en la fóormula general II, M es titanio;L2 es un óatomo de oxógeno o de nitroógeno;L1 es un anillo ciclopentadienilo, indenilo o fluorenilo, [(R)cQ] es H2C-CH2,CRHCH2, RHC - SiR'2,R2C - SiR'2 o SiRR'.
- 8Compuesto catalizador sóolido que se puede obtener mediante el soporte del compuesto catalizador seguón las reivindicaciones 1 - 7 sobre un sóolido inorgaónico poroso.
- 9Compuesto catalizador soólido seguón la reivindicacióon 8 en el que el soólido inorgóanico poroso se selecciona del grupo que comprende:sólice, alumina, alumina de sólice, fosfatos de aluminio y mezcla de ellos.
- 10Procedimiento para la preparacióon de un compuesto catalizador sóolido que comprende los pasos siguientes:impregnacióon, en condiciones anhidro y atmóosfera inerte, de una disolucioón de al menos un compuesto catalizador seguón las reivindicaciones 1 - 7, sobre el material de soporte a una temperatura entre - 20° C y 90° C, filtración y lavado con un disolvente, seleccionado entre los hidrocaroburos alifóaticos o aromaóticos.
- 11Procedimiento para la preparacioón de un compuesto catalizador soólido que comprende los pasos siguientes:depoósito del compuesto catalizador seguón las reivindicaciones 1 - 7 sobre el soporte, usando una disolucióon del compuesto ES 2 154 017 T3 para heterogeneizarlo, eliminacióon del disolvente mediante evaporacioón, calentar el residuo sóolido hasta una temperatura entre 25 y 150 ° C.
- 12Procedimiento para la preparacioón de un compuesto catalizador sóolido seguón la reivindicacióon 10, en el que antes del paso de impregnacióon, en condiciones anhidro y atmoósfera inerte, de una disolucióon de al menos un compuesto catalizador seguón las reivindicaciones 1 - 7, el compuesto catalizador se mezcla con un cocatalizador.
- 13Procedimiento para la preparacioón de un compuesto catalizador sóolido seguón la reivindicacioón 11, en el que antes del paso de depóosito del compuesto catalizador seguón las reivindicaciones 1 - 7 sobre el soporte, el compuesto catalizador se mezcla con un cocatalizador.
- 14Catalizador de la polimerizacióon que comprende el compuesto catalizador seguón las reivindicaciones 1 - 9 y un cocatalizador.
- 15Catalizador de la polimerizacióon seguón la reivindicacióon 14, en el que el cocatalizador se selecciona del grupo que comprende:alquilaluminoxano, compuesto de boro o una mezcla de ellos.
- 16Procedimiento para la polimerizacióon de α - olefinas en disolucióon, en suspensióon, en fase gaseosa a presiones y temperaturas bajas y altas o en masa a presiones altas y temperaturas altas o bajas que incluyen el uso de un catalizador de la polimerizacióon seguón las reivindicaciones 14 15.
- 17Procedimiento para la polimerizacioón de α - olefinas en disolucióon, en suspensioón, en fase gaseosa a presiones y temperaturas bajas y altas o en masa a presiones altas y temperaturas altas o bajas seguón la reivindicacioón 16 en el que el monoómero es etileno.
- 18Procedimiento para la polimerizacioón de α - olefinas en disolucioón, en suspensioón, en fase gaseosa a presiones y temperaturas bajas y altas o en masa a presiones altas y temperaturas altas o bajas seguón la reivindicacióon 16, en el que el monóomero es etileno y el comonoómero se selecciona del grupo que comprende:propileno, buteno, hexeno, octeno y 4 - metil - 1 - penteno.
- 19Procedimiento para la polimerizacióon de α - olefinas en disolucioón, en suspensióon, en fase gaseosa a presiones y temperaturas bajas y altas o en masa a presiones altas y temperaturas altas o bajas seguón la reivindicacioón 18, en el que el comonóomero se usa en proporciones entre 0,1 % y 70 % en peso del total de los monóomeros. NOTA INFORMATIVA:Conforme a la reserva del art. 167.2 del Convenio de Patentes Europeas (CPE) y a la Disposición Transitoria del RD 2424/1986, de 10 de octubre, relativo a la aplicación del Convenio de Patente Europea, las patentes europeas que designen a España y solicitadas antes del 7-10-1992, no producirán ningún efecto en Espana en la medida en que confieran proteccion a productos quámicos y farmaceuticos como tales. Esta informacioán no prejuzga que la patente estáeo no incluáda en la mencionada reserva.
Independent claims19
170 paragraphs in 3 sections, as filed
ES 2 154 017 T3
DESCRIPTION
Catalytic systems for the polymerization and copolymerization of alpha-olefins.
The present invention relates to metallocene catalysts, which can be easily heterogenized on an inorganic support. State of the art
The organocomplexes of the elements belonging to group IV, in combination with the alkylaluminoxanes and / or the compounds with boron, lead to the formation of polymerization catalysts, whose activities are sometimes better than those obtained with the classic ZieglerNatta catalysts (Makrom. Chem. 179, 2553 (1978) and 169, 163 (1973), DE 1022382, US 3184416, US 3440237, EP 277004 and EP 426637).
It is well known that homogeneous catalytic systems have a disadvantage: when used in suspension polymerization processes, a part of the polymer produced adheres to the walls of the reactor; this effect is technically known as "reactor fouling". Furthermore, in most cases the particle size of the polymer obtained is very small and the apparent density is low, so the industrial production is low. To avoid fouling in the reactor and to control the size and morphology of the polymer particles formed, an inorganic oxide can be the support of the homogeneous system.
In recent years, three different preparation strategies have been used to achieve this objective: cocatalytic heterogenization, metallocyenic heterogenization, or heterogenization of the two components on an adapted support.
Several patents describe heterogeneous catalytic synthesis using processes based initially on cocatalytic fixation on the support.
US patents 4939217 and 5064797 describe a heterogenization process based on the "in situ" preparation of aluminoxane on the support. The process consists of bubbling a humidified inert gas directly into a solution of an aluminum alkyl in the presence of the support. When a solution of an organocomplex is added to this heterogenized cocatalyst, the catalysis is heterogenized.
Patents EP 323716, EP 361866, EP 336593, EP 367503, EP 368644 and United States 5057475 describe a different procedure to the previous one. In this case, the cocataíysis is heterogenized by a direct reaction of the aluminum alkyl with the water molecules that hydrate the surface of the support. In a similar way to that described in the previous patents, the fixation of the organic compound is then obtained by means of the close contact of a solution of the organocomplex with a suspension of the modified support.
In both cases it may happen that part of the aluminum cocatalyst is not distributed homogeneously on the support surface. Furthermore, it is quite difficult that, going from one preparation to another, it is possible to exactly reproduce the structure and molecular weight of the heterogenized aluminoxane. Another important disadvantage is the migration of the active species to the homogeneous phase during the polymerization reaction.
WO-A-97/28170, which is a prior art in Art. 158 (1) EPC, describes a new catalyst precursor in which an alkoxy or siloxy substitution has been carried out at position 2 of the indenyl compounds. The catalyst obtained is, however, used under homogeneous conditions in the olefin polymerization.
EP 293815 describes metallocyenic fixation according to the reactivity of the alkoxysilane functional group (Me2 (EtO) Si-) with the surface hydroxy groups of inorganic oxide. The activity in the polymerization is not very high, probably due to the inactivation of a high percentage of the organocomplex. A further disadvantage is the low yield obtained in the preparation of this type of functionalized organometayl compounds.
The object of the present invention is to avoid these drawbacks by means of a process for the synthesis of supported catalysts for the (co) polymerization of ethylene and α-olefins with 3omies of carbon, such as propene, 1-butene, 1-pentene, 1- hexene, 4-methyl-1-pentene and 1-octene. Unlike other more conventional procedures, this heterogenization procedure is based on the reactivity of functional groups OSiR "3 of organocomplexes with the surface reactive groups of the catalytic support. Predictably, the fixation of this type of metallocenes, functionalized with OSiR "3 groups is due, as described in Figure IV, to the reaction between the OSiR" 3 groups of the organomethail complexes and the reactive groups of the support.
Another object of the present invention is the use of the organometayl complexes of formulas I and II as homogeneous catalysts for the homopolymerization and copolymerization of olefins.
Thanks to the processes described in the present invention, heterogeneous catalysts can be obtained; they allow the morphology and distribution of particle sizes to be controlled efficiently, with a regular growth of the polymer around the catalyst particles.
Detailed description of the invention
The present invention relates to homogeneous and heterogeneous catalytic systems containing transition metal metallokine complexes with at least one P-OSiR "3 group potentially reactive with the support.
According to the present invention, the catalyst system includes at least one metallocyen complex of general formula I or II.
I (L (R) a) xMXy
ES 2 154 017 T3 (R) a <sup>|</sup>
L1 / \
[(R) cQ] m MXd II \ / <sup>L</sup>2 <sup>|</sup> (R) b in which:
R, equal to or different from others, is a radical containing between 1 and 20 carbon atoms; this group can optionally contain heteroatoms from groups 14 to 16 of the periodic table of elements and boron, at least one group R contains a group OSiR "3, preferably it is: C1-C20 alkyl, C3-C20 cycloalkyl, C6-C20 aryl, C7-C20 alkenyl, C7-C20 arylalkyl, C7-C20 arylalkenyl or alkylaryl, linear or branched or an SiR'3 group in which R 'is C1-C20 alkyl, C3-C20 cycloalkyl, C6-C20 aryl, C7-C20 alkenyl, C7-C20 arylalkyl, C7-C20 arylalkenyl or alkylaryl, linear or branched or a group OSiR "3 where R" is selected from the group comprising: C1-C20 alkyl, C3-C20 cycloalkyl, C6-C20 aryl, C7-C20 alkenyl, C7-C20 arylalkyl, C7-C20 arylalkenyl or alkylaryl, linear or branched.
Non-limiting examples of R containing the group OSiR "3 are:
-CH2 -CH2 -OSiMe3; - CH2 -CH2 -CH2 OSiMe3; - CH2 -O-CH2-OSiMe3; -O-CH2 CH2-OSiMe3; - SiMe2 -CH2 -CH2 - OSiMe3; CH2 -C5H5 -CH2 -OSiMe3; - CH (C2H5) -CH2-OSi (C2H5) 2Me; - C5H5 -CH2-OSi (C5H5) 3; C5H5 -C5H5 -CH2 -OSi (<sup>i</sup>Pr) 3; - C (CH3) 2 -CH2 -C5H5 -CH2 -CH2 -OSi (C5H11) 3; -C5H5 -CH2 -CH2 -OSi (CH2Ph) 3; - C (CH3) 2-C (CH3) 2 OSi (PhMe) 3; - CH (CH3) -CH (CH3) -OSi (C2H5) (Me) 2.
Preferably, the group R containing OSiR "3 is selected from the group comprising: -CH2 -CH2-OSiMe3; - CH2 -CH2 -CH2 OSiMe3; - CH2 -O-CH2-OSiMe3; -O-CH2 CH2-OSiMe3; - SiMe3 -CH2 -CH2 - OSiMe3.
The m value can range from 1 to 4 and is preferably 1 or 2. Q is selected from the group comprising: boron or an element from groups 14 to 16 of the periodic table; when m> 1, the Q groups are the same or different from others, the free valences of each Q are completed with R groups according to the value of the Index c; Two R groups are optionally joined to form a ring of 5 to 8 atoms.
L, equal to or different from others, is a calcium organic group linked to M through a π bond, contains a cyclopentadienyl ring, which optionally fuses with one or more rings to form, for example: tetrahydroindenyl, indenyl, fluorenyl or octahydrofluorenyl groups; o is an atom of groups 15 or 16 of the periodic table; when it is an atom of groups 15 or 16 of the periodic table (heteroatom), it is preferably an oxygen or nitrogen atom, directly bonded to the metal.
L1 and L2, the same or different from each other, have the same meaning as L;
M is a metal of groups 3, 4, 10 of the periodic table, lanthanides or actanides, preferably it is Ti, Zr or Hf;
X, equal to or different from others, is selected from a group comprising: halogen, hydrogen, OR "', N (R"') 2, C1-C20 alkyl or C6-C20 aryl, where R "'is selected from a group comprising: C1-C20 alkyl, C3-C20 cycloalkyl, C6C20 aryl, C7-C20 alkenyl, C7-C20 arylalkyl, C7-C20 arylalkenyl or alkylaryl, linear or branched;
xes1oá2, yes2áo3deformaquex + y = 4 dvade0a2;
a, b and c are integers from 0 to 10, so that a + b + c> 1, the maximum value of a and b depends on the available positions in L, L1 orL2; for example, for cyclopentadiene, in general formula I, 5 is the maximum value of a, on the contrary, in general formula II, for cyclopentadiene, 4 is the maximum value of a or b; for nitrogen in the general formula II, a or b is 1, for oxygen it is 0, the value of the index of c depends on the free valences of the group Q, for example, if Q is equal to an atom of silicon or an atom of carbon, the value of c is 2; if Q is a boron atom, the value of c is 1.
Examples of [(R) cQ] m when m equals 1 and equals 2: R2Si, R2C.
Examples of [(R) cQ] m when m equals 2 and equals 2: R2Si-CR2, R2C-CR2, R2SiSiR2.
Examples of [(R) cQ] m when m equals 3 and c equals 2 or 1: R2Si-O-SiR2, R2Si-O-CR2,
RB-O-BR.
The metallocaenic complexes belonging to the general formula I, in which x = 2, and those belonging to the formula II in which d = 2 can be prepared by reacting a metal compound of the general formula MXn (E) q, in which E is a linear or calclic aether, q is a number between 0 and 4 ynes 3 or 4 with another compound of the general formula [(L (R) a)] M 'or [(R) aL1 - ((R) cQ) m L2 ( R) b] M'2 in which M 'is an alkali metal, preferably Li, Na or K. The preferred compound of the transition metals is tetrachloride and sometimes, when the metal is titanium, it is trichloride or its adduct with a calcium ether such as tetrahydrofuran.
The reaction between the metal compound and the alkali metal derivative is preferably carried out in a dry nitrogen atmosphere, using anhydrous solvents such as linear or caclic ethers such as diethylethers, tetrahydrofuran or dioxane, or aromatic hydrocarbons such as toluene.
The alkali metal compound of faormula [(L (R) a)] M 'can be prepared from the compound of faormula L (R) aH by a reaction with lithium alkyl, with a sodium or potassium hydride or directly with metal.
On the other hand, the ligand L (R) aH, when L is or contains a cyclopentadienyl ring, can be preferably obtained from cyclopentadiene or indene by reacting its sodium salts in the first case and its potassium salt in the second case. , with a compound RS, where R has
ES 2 154 017 T3 has been defined above and S is a suitable leaving group such as aryl halide, alkyl or sulfonate. The reaction is repeated as many times as necessary, according to the following scheme, up to a total of 3:
LM '+ RS LR + M'S LRM' + RS LR<sub>2</sub> + M'S
LR<sub>2</sub>M '+ RS LR<sub>3</sub> + M'S
The alkali metal compound [(R) aL1 [(R) cQ] m-L2 (R) b] M'2 can be obtained by reacting two equivalents of a metallizing agent such as alkyl lithium, e.g. e.g. MeLi or BuLi, or alternatively sodium or potassium hydride, with a compound of formula ((R)<sub>to</sub>HL<sub>1</sub>[(R) cQ] m-L2H (R) b). When a group L is an oxygen or nitrogen atom, the preferred metallizing agent is alkyl lithium. The compound of the formula [(R) aHL1 - [(R) cQ) m-L2H (R) b] can be obtained by reacting the alkali metal compound [L1H (R) a] M 'or [L2H ( R) a] M 'or mixtures thereof with a compound of the formula S [(R) cQ] mS in which S is a suitable leaving group, such as a halogen (CL, Br, I) or an aryl or sulfonate I rent.
The preferred metallocoenic complexes of formula I correspond to the compounds in which:
- M is zirconium
- R is C1-C4 alkyl, in which at least one hydrogen of an R is substituted with OSiR "3, in which R" is selected from the group comprising: methyl, ethyl, propyl
- L is a cyclopentadienyl or indenyl group
-x = 2ey = 2
The preferred complexes of general formula II, in which L1 and L2 are coclic organic compounds, correspond to the compounds in which:
- M is zirconium
-L1 andL2 are cyclopentadienyl or indenyl groups
- R is hydrogen, a C1-C4 alkyl in which at least one hydrogen of an R is replaced by a group OSiR "3 or a group SiR" 2-OSiR "3, where R" is selected from the group comprising: methyl , ethyl, propyl
- [(R) cQ] m is selected from the group comprising: H2C-CH2, CRH-CH2, RHC-SiR'2, R2CSiR'2 or SiRR '.
Preferred complexes of general formula II in which L1 or L2 is an oxygen or nitrogen atom correspond to compounds in which:
- the other group L1 or L2 is a cyclopentadienyl, indenyl or fluorenyl ring
- M is titanium
- [(R) cQ] m is H2C-CH2, CRH-CH2, RHCSiR'2, R2C-SiR'2 or SiRR '
An appropriate inorganic support can provide support for the compounds of formula I or II. As support, any type of inorganic oxide can be used, for example inorganic oxide such as: solid, alumina, solid alumina, aluminum phosphates and mixtures of them, obtaining support catalysts with a content of transition metals between 0.01% and 10% by weight, preferably between 1% and 4%.
A process that can be adapted to prepare support catalysts according to this invention consists in the impregnation, under anhydrous conditions and with an inert atmosphere, of the solution of any metallocene of formula I or II or a mixture of them, on the material of support at an appropriate temperature, preferably between -20 ° C and 90 ° C. The support catalyst containing the metallocene can be obtained by filtering and washing with a suitable solvent, preferably an aliphatic or aromatic hydrocarbon without polar groups.
Another procedure that may be appropriate consists of deposition of the metallocene on the support using a solution of the compound that has been heterogenized, removing the solvent by evaporation and then heating the solid residue to a temperature between 25 and 150<sup>°</sup>C. In addition, the resulting residue obtained in this process can be washed and filtered later.
The process can also be carried out in the presence of a cocatalyst which, for example, can be mixed with a metallocene in an appropriate solvent and the resulting solution can then be brought into contact with the support.
The amount of organometaolic complex that can be fixed under these conditions depends directly on the concentration of the reactive groups present on the support. For this reason the solid, for example, is preferably calcined at a temperature between 600<sup>°</sup>C and 800<sup>°</sup>C.
An advantageous aspect of this invention is that the fixation process, as a consequence of the reaction of R groups, containing the entity -OSiR "3 with the reactive groups of the support surface, avoids the desorption of the support metallocoenic complexes. This type of interaction represents the main difference between the heterogenization mechanism of organocomplexes and other conventional procedures, in which the metallocoenic complex in general remains fixed by phosphorous means on the support surface. The fixation of the organocomplex to the inorganic support is based on the reaction of the reactive groups of the support with the -OSiR "3 group or with metallocene groups, as described in figure IV.
Formula I or II metallocoenic complexes, individually or with support, can be used in the presence of a cocatalyst for olefin polymerization or copolymerization in a solution or suspension process.
When X is a halogen, OR "'or N (R"') 2, the preferred cocatalysts are alkylaluminoxane, especially the methylaluminoxane compounds, when X is hydrogenic or alkyl, the preferred catalyst is a Lewis acid such as B (C5F5) 3 . In addition, mixtures of products derived from aluminoxane and boron can also be used as cocatalysts.
The most appropriate polymerization procedure may vary according to the type of polymerization procedure chosen (in solution, in suspension or in the gas phase).
For solution polymerization, the cocatalyst can be mixed with a solution of a metallocene of formula I or II and an additional quantity of oil can be added to the solution.
ES 2 154 017 T3 or the catalyst can be added directly to the polymerization medium, which contains the cocatalyst.
For suspension polymerization, the cocatalyst can be premixed with the solid support catalyst, it can be added to the polymerization medium before the support catalyst, or both operations can be carried out sequentially.
The process consists in contacting the monoomer or, in certain cases, the monoomer and the comonomer, with a catalytic compound according to the present invention, which includes at least one metallocoenic complex of formula I or II, at a suitable temperature and pressure. .
The α-olefins that can be used as comonoomers to obtain ethylene copolymers can be propylene, butene, hexene, octene or branched as 4-methyl-1-pentene and can be used in proportions between 0.1% and 70% by weight of the total of the monomers. In the case of ethylene homopolymerization, the density of the polymers ranges between 0.950 and 0.965 g / cm<sup>3</sup>, in the case of ethylene copolymerization, the density is as low as 0.900 g / cm<sup>3</sup>.
To control the molecular weight of the polyomers obtained, hydrogen can optionally be used as a chain transfer agent in proportions in which the partial pressure of hydrogen, with respect to olefin, ranges from 0.01% to 50%.
In the specific case of the polymerization technique known as the suspension procedure or the controlled particle morphology procedure, the temperature used ranges from 30<sup>°</sup> and 100<sup>°</sup>C, the same that is usually used in the gas phase, while for the process in solution the usual temperature was between 120<sup>°</sup> and 250<sup>°</sup>C.
The pressure changes used depend on the polymerization technique: it ranges between atmospheric pressure and 350 MPa.
Figure I shows examples of compounds according to formula I, figure II shows examples of compounds according to formula II, in which L1 and L2 contain a cyclopentadienyl derivative product. In figure III there are examples of compounds according to formula II, in which one group L is an oxygen or nitrogen atom and the other group contains a cyclopentadienyl derivative product. Figure IV shows the reaction between the siloxane groups of the supports and the -OsiR "3 groups of the organometallic complexes.
The following examples are described in order to better understand the invention. The materials, chemical compounds, and conditions used in these examples are illustrative and do not limit the scope of the invention.
Example 1
a) Preparation of (dimethyl) - (trimethylsiloxy) silyl-cyclopentadiene
To a solution of 20.9 g (187 mmol) of sodium trimethylsilanolate in tetrahydrofuran, 30.3 g (191 mmol) of chlorocyclopentadienyl-dimethylsilane in tetrahydrofuran is added at room temperature and a pink suspension immediately forms. It is allowed to react for 12 hours. After it is neutralized with an aqueous ammonium chloride solution, the orgaonic phase is extracted, dried with anhydrous magnesium sulfate and the solvent is removed in vacuo, an orange oil is recovered. This oil is distilled and the desired product is obtained in the form of a pale yellow oil. (Tb: 60<sup>°</sup>C; 0.014 bar (10 mmHg)). (31.6 g, 149 mmol. Yield: 80%).<sup>1</sup>H-NMR (CDCl3): 6.65 (m, 2H), 6.54 (m, 2H), 3.52 (s, 1H), 0.60 (s, 9H), -0.2 (s, 6H).
b) Preparation of (dimethyl) - (trimethylsiloxy) silyl-potassium cyclopentadienide
To a suspension of 0.6 g (15 mmol) of potassium hydride in tetrahydrofuran, a solution of 3.1 g of (dimethyl) (trimethylsiloxy) -silyl-cyclopentadiene is added at -78<sup>°</sup>Cyse observes a strong production of H2. It is kept under stirring until room temperature is reached. It is allowed to react for more or less 1 hour, until all the potassium hydride has reacted. The tetrahydrofuran solution is concentrated in vacuo and a light yellow solid is obtained. (3.45 g, 13.8 mmol. Yield: 92%).
c) Preparation of cyclopentadienyl [((dimethyltrimethyl-siloxyl-silyl) -cyclopentadienyl] zirconium dichloride
To 5.2 g (14 mmol) of an adduct of cyclopentadienyl zirconium trichloride with dimethoxyethane in toluene, a suspension of 3.45 g (13.8 mmol) of potassium dimethyltrimethylsiloxy-silyl-cyclopentadienide in toluene a-78 is added<sup>°</sup>C. The suspension is kept in agitation for 24 hours; After allowing to settle, a yellow solution is filtered. The yellow solution is concentrated to 20 ml, then a little hexane is added and a white crystalline solid precipitates (3.1 g, 7.1 mmol. Yield: 51%).<sup>1</sup>H
- NMR (C6D6): 6.45 (t, 2H), 6.03 (s, 5H), 5.95 (t, 2H), 0.39 (s, 6H), 0.09 (s, 9H) , <sup>13</sup>C-NMR (C6D6); 125.4, 123.6, 117.3, 115.9, 2.0. Mass spectrum. M<sup>+</sup> - 15: m / e 422.9 (32%).
Example 2
a) Preparation of bis [((dimethyltrimethylsiloxy-silyl) -cyclopentadienyl] zirconium dichloride
To 0.93 g (4 mmol) of zirconium tetrachloride is added a suspension of 2.02 g (8 mmol) of potassium dimethyltrimethylsiloxy-silyl cyclopentadienide in hexane a-78<sup>°</sup>C. The formation of a yellow suspension is observed. It is left stirring for 12 hours. The solution is then filtered and concentrated until a yellowish crystalline solid is obtained. (0.75 g, 1.3 mmol. Yield: 32%).<sup>1</sup>H-NMR (C6D6): 6.58 (t, 2H), 6.13 (t, 2H), 0.45 (s, 6H), 0.14 (s, 9H), <sup>13</sup>C
- NMR (C6D6); 126.2, 124.1, 116.5, 2.13, 2.06. Mass spectrum. M<sup>+</sup> - 15: m / e 569 (15%). Example 3
a) Preparation of 2-bromo-1-trimethylsiloxyethane
To 125 g (888 mmol) of 2-bromo-ethanol, 95 ml (1450 mmol) of hexamethyldisilazane are slowly added at 0<sup>°</sup>C. Immediately ammonia production is observed. The reaction was kept under stirring for 12 hours and obtained
ES 2 154 017 T3 has a colorless oil. (168.8 g, 856 mmol.
Yield: 96%). <sup>1</sup> H-NMR (CDCl3): 3.66 (t, 2H), 3.40 (t, 2H), 0.14 (s, 9H).
b) Preparation of (2-trimethylsiloxy-ethyl) cyclopentadiene
150 ml of a 2.3 M solution of sodium cyclopentadienide in tetrahydrofuran (346 mmol) is slowly added to a solution of 68.2 g (346 mmol) of 2-trimethylsiloxy-1-bromoethane in tetrahydrofuran. An immediate formation of a pink solid is observed. The reaction is kept under stirring for 12 hours. Then an aqueous solution of ammonium chloride is added. The orgaonic phase is extracted, dried with magnesium sulfate and the volatile part is distilled under vacuum, obtaining an orange oil. This oil is distilled to obtain a colorless oil. (T<sub>b</sub>: 63-65 C; 0.02 bar (15 mmHg)). (40.3 g, 221 mmol. Yield: 64%).<sup>1</sup>H-NMR (CDCl3): 6.50-6.00 (m, 3H), 3.75 (m, 2H), 2.95 (m, 2H), 2.65 (m, 2H), 0.15 (s, 9H).
c) Preparation of lithium (2-trimethylsiloxy-ethyl) cyclopentadienide
To 7.33 g of (2-trimethylsiloxy-ethyl) -cyclopentadiene in ether is added 16 ml of a solution
2.5 M butyl lithium in hexane (40 mmol). The addition is carried out at -78 ° C. An immediate formation of a white solid is observed and the production of butane. They keep reacting for 3 hours. After drying, the resulting solid is washed with hexane, leaving a white solid powder (6.19 g, 33 mmol, Yield: 82%).
d) Preparation of bis [(2-trimethylsiloxy-ethyl) -cyclopentadienyl] zirconium dichloride
To 1.37 g (5.9 mmol) of zirconium tetrachloride, add a suspension of 2.2 g (11.7 mmol) of lithium (2-trimethylsiloxy-ethyl) -cyclopentadienylide a-78<sup>°</sup>C. Immediately an orange suspension forms. The reaction is kept under stirring for 12 hours. Finally, the solution is filtered, concentrated until dry and a yellow oily solid is recovered, which is mixed with hexane and a yellow solid is obtained. (1.05 g, 2 mmol. Yield: 34%).<sup>1</sup>H-NMR (C6D6): 6.02 (t, 2H), 5.72 (t, 2H), 3.62 (t, 2H), 2.89 (t, 2H), 0.05 (s, 9H ), <sup>13</sup>C-NMR (C6D6); 117.7, 112.0, 111.2, 62.6, 34.0, - 0.45. Mass spectrum. M<sup>+</sup> - 15: (509). 1,24%.
Example 4
a) Preparation of potassium (2-trimethylsiloxy-ethyl) cyclopentadienide
To a suspension of 0.5 g (12.4 mmol) of potassium hydride in tetrahydrofuran, 2.25 g (12.4 mmol) of (2-trimethylsiloxy-ethyl) cyclopentadiene in tetrahydrofuran are added. The reaction is kept under stirring for 2 hours and then the volatile compounds are eliminated, leaving an oily solid that is washed with hexane to obtain a brownish solid. (2.2 g. Yield: 81%)
b) Preparation of cyclopentadienyl ((2-trimethylsiloxy-ethyl) -cyclopentadienyl) zirconium dichloride
To a suspension of 3.52 g (10 mmol) of an adduct of cyclopentadienyl zirconium trichloride with dimethoxyethane in toluene, a suspension of 2.2 g (10 mmol) of (2-trimethylsiloxyethyl) -potassium cyclopentadienide in toluene is added. . The addition takes place at - 78<sup>°</sup>C. Immediately an orange-brown suspension is formed, it is kept under stirring for 12 hours, then it is allowed to settle and it is filtered. The orange solution obtained is concentrated to 5 ml and hexane is added, so that a brown solid is obtained. (1.1 g, 2.7 mmol. Yield: 27%).<sup>1</sup>NMR: 6.00 (t, 2H), 5.87 (s, 5H), 5.67 (t, 2H),
3.66 (t, 2H), 2.92 (t, 2H), 0.11 (s, 9H). Mass spectrum. M<sup>+</sup> - 65: (343). 33 %.
Example 5
a) Preparation of 3-bromo-1-trimethylsiloxypropane
To 12.2 g (76 mmol) of hexamethyldisilazane, 21 g (151 mmol) of 3-bromo-1 propanol are added. Ammonia production is immediately observed. The reaction is kept under stirring for 2 hours and finally they are obtained
24.5 g (148 mmol) of the desired compound. Yield: 98%.<sup>1</sup>H-NMR (CDCl3): 3.74 (t, 2H), 3.55 (t, 2H), 2.09 (m, 2H), 0.14 (s, 9H).
b) Preparation of (3-trimethylsiloxypropyl) cyclopentadiene
To 50 ml of a 2.3 M solution of sodium cyclopentadienylide (115 mmol) is added a solution of 24.3 g (115 mmol) of 3-bromo-1-trimethylsiloxypropane in tetrahydrofuran. A rapid formation of a pink solid is observed. The reaction is kept under stirring for 12 hours and then it is neutralized with an ammonium chloride solution; The orgaonic phase is extracted and concentrated to dryness to obtain an orange oil. (9.8 g, 50 mmol. Yield: 43%).<sup>1</sup>H-NMR (CDCl3): 6.47-6.00 (m, 3H), 3.62 (m, 2H), 2.95 (m, 1H), 2.87 (m, 1H), 2.43 (m, 2H), 1.80 (m, 2H), 0.17 (s, 9H).
c) Preparation of lithium (3-trimethylsiloxypropyl) cyclopentadienide
To a solution of 2.62 g (13.4 mmol) of (3-trimethylsiloxypropyl) -cyclopentadiene in ether, 5.36 ml of a 2.5 M (13.4 mmol) solution of butyl lithium are added to-78<sup>°</sup>C. An immediate formation of a white solid is observed. The reaction is kept under stirring for 2 hours; After the white suspension is dried, the resulting solid is washed twice with hexane and a white solid powder is obtained. (2.3g, 11.4mmol. Yield: 85%).
d) Preparation of bis [(3-trimethylsiloxypropyl) -cyclopentadienyl] zirconium dichloride
To a suspension of 1.33 g (5.7 mmol) of zirconium tetrachloride, a suspension of 2.3 g (11.4 mmol) of lithium (3-trimethylsiloxypropyl) -cyclopentadienylide is added to - 78<sup>°</sup>C. An orange suspension forms immediately and the reaction is kept stirred for 12 hours. It is subsequently filtered and the resulting solution is concentrated to 5 ml, hexane is added and a white microcrystalline solid is formed. (1.27 g, 2.3 mmol. Yield: 40%).<sup>1</sup>H-NMR (C6D6): 5.95 (t, 2H), 5.77 (t, 2H), 3.52 (m, 2H), 2.81 (m, 2H), 1.80 (m, 2H ), 0.15 (s, 9H). Mass spectrum. M<sup>+</sup> - 15: (357). 59%.
Example 6
a) Preparation of potassium (3-trimethylsiloxypropyl) cyclopentadienide
ES 2 154 017 T3
To a suspension of 0.4 g (10 mmol) of potassium hydride in tetrahydrofuran, add
1.96 g (10 mmol) of (3-trimethylsiloxypropyl) -cyclopentadiene in tetrahydrofuran. The reaction is kept under stirring for 2 hours. Subsequently, the resulting suspension is concentrated to dryness, leaving an oily solid which, when washed with hexane, gives a cream colored solid (1.6 g, 7 mmol. Yield: 70%).
b) Preparation of [cyclopentadienyl (3-trimethylsiloxypropyl) -cyclopentadienyl] zirconium dichloride
To a suspension of 2.46 g (7 mmol) of cyclopentadienyl zirconium trichloride in toluene, a suspension of 1.6 g (7 mmol) of potassium (3-trimethylsiloxypropyl) -cyclopentadienide in toluene is added. A yellow-brownish suspension immediately precipitates. The reaction is maintained for 12 hours. Subsequently, the solution is filtered and concentrated, a white crystalline solid is formed. (0.8 g, 2 mmol. Yield: 28%).<sup>1</sup>H-NMR (C6D6): 5.87 (t, 2H), 5.65 (t, 2H), 3.46 (m, 2H), 2.74 (m, 2H), 1.73 (m, 2H ), 0.14 (s, 9H). <sup>13</sup>C-NMR (C6D6); 116.9, 115.0, 114.7, 112.2, 61.8, 33.6, 26.8, - 0.393. Mass spectrum. M<sup>+</sup> - 65(356): 30%.
Example 7
Heterogenization of bis [(3-trimethylsiloxypropyl) -cyclopentadienyl] zirconium dichloride on silica
To a suspension of 12 g of silica (Grace XPO
- 2407, calcined at 800 ° C) in 70 ml of toluene, a solution of 4.1 g of the compound prepared according to the description of example 5d in 20 ml of toluene is added. The reaction mixture is kept stirred at 25 ° C for 18 hours. The solution is separated from the solid by filtration.
The solid is then washed with various toluene fractions, up to a total volume of 500 ml and dried under vacuum for 18 hours. The Zr content of the sample was determined by ICP and the result was 1.7%.
When the same sample was washed with 50 ml (in three fractions) of a 1.5 M solution of MAO in toluene, the percentage of Zr that was left in the sample decreased to 1.1%.
Example 8
Heterogenization of [cyclopentadienyl (3-trimethylsiloxypropyl) -cyclopentadienyl] zirconium dichloride on silica
To a suspension of 3 g of solid, in about 70 ml of dry toluene, 0.5 g (1.32 mmol) of a compound prepared according to example 6b is added.
The reaction mixture was kept under stirring at 25 ° C for about 18 hours. The solid was separated from the solution by filtration. The resulting solid was then washed with a total volume of 500 ml of toluene and dried under vacuum for 12 hours. Analysis of the zirconium in the sample by I'P gave 1.7%.
Example 9
Heterogenization of bis [(2-trimethylsiloxyethyl) -cyclopentadienyl] zirconium dichloride
At a suspension of 3 g of solid (Grace XPO
- 2407, calcined at 800 ° C) in 70 ml of toluene, a solution of 0.5 g of the compound described in example 3d in 20 ml of toluene is added.
The reaction mixture was kept stirred at 40 ° C for 18 hours. The solution was separated from the solid by filtration. The solid resulting from the reaction was analyzed by IP, which showed that the percentage of zirconium in the sample was 2.75%.
The solid was then washed with three different toluene fractions to a total volume of 500 ml and vacuum dried for 18 hours. The Zr content of the sample was determined by I'P and gave 2.79% zirconium.
Example 10
Heterogenization of bis [(3-trimethylsiloxypropyl) -cyclopentadienyl] zirconium dichloride in aluminum phosphate
The compound was heterogenized by the same process used with solid as support, according to the description of example 7, but using aluminum phosphate (Grace APGE) instead of solid (Grace XPO-2407).
The Zr content of the sample was determined by X-ray fluorescence and gave 2% zirconium.
Example 11
Ethylene polymerization
The ethylene polymerization reactions were carried out in a Buchi reactor of 1 liter capacity under anhydrous conditions. The reactor, charged with 600 ml of dry and degassed heptane, was conditioned at 70 ° C. Before pressurizing the reactor with ethylene, the cocatalyst was injected at a pressure of 1 atm. The reactor was then pressurized to 3.75 atm. At the end, the catalyst was injected using an extra pressure of 0.25 atm of ethylene. The polymerization reactions were maintained under these conditions of pressure (4 atm) and temperature (70<sup>°</sup>C). The suspension was stirred with the aid of a shaker at 1,200 rpm for 15 or 30 minutes.
ml (31.8 mmol Al) of MAO of a 10% solution of aluminum in toluene (commercially available from Witco) was injected into the reactor; 0.1 g of the catalyst [cyclopentadienyl (3-trimethylsiloxypropyl) cyclopentadienyl] zirconium dichloride on a solid support, prepared according to the description of Example 8 (18.24 µmol Zr), are added to this solution. Once complete, the polymerization reaction was kept under stirring at a temperature of 70<sup>°</sup>C and at 4 atm of ethylene pressure for 30 minutes. At the end of the reaction the pressure was rapidly reduced and the reaction was stopped by adding acidified methanol. 5.21 g of polymer are obtained with a molecular weight of 157,824 (activity: 1.4 χ 10<sup>5</sup> g PE / (mol Zr * h * atm).
Example 12
Copolymerization of ethylene with 1-hexene
The copolymerization reaction is carried out under the same conditions as those described for the ethylene polymerization, after the initial addition of the comonoomer in the reactor.
10 ml of 1-hexene (24.2% per mole of comonomer in the charge) and 13 ml of MAO, of a 10% aluminum solution (31.8 mmol of Al) are injected into the reactor. 0.1 g of a [cyclopen7
ES 2 154 017 T3 tadienyl (3-trimethylsiloxypropyl) cyclopentadienyl] zirconium prepared following the description of Example 8 (18.4 µmol Zr) on a salice support. The polymerization reaction was maintained at a temperature of 70 ° C and an ethylene pressure of 4,132 bar (4 atm) for 30 minutes. At the end, the pressure was rapidly reduced and the reaction was stopped by adding acidified methanol. 5.14 grams of copolymer are obtained with: Mn = 41,970, Mw = 220877, Mw / Mn = 5.26 and 0.92 molar% of hexene. (Activity: 1.4 x 10<sup>5</sup> g PE / (mol Zr * h * atm).
Example 13
Copolymerization of ethylene with 1-hexene
Ethylene and 1-hexene were copolymerized. To do this, the same procedure as in the previous example (number 12) is used, with the exception that once the solvent has been added and before pressurizing the reactor, 4 ml of dry and freshly distilled 1-hexene are added (12 % hexene in the load). 13 ml of a MAO solution in toluene (1.5 M total aluminum) and 0.1 g of catalyst prepared following the description of example 8 are used. After 30 minutes of polymerization, 1.47 g of polymer are obtained (1.65 x 10<sup>5</sup> g PE / (mol Zr * h * atm). The 1 hexene content in the copolymer, determined by<sup>13</sup>C-NMR, was 0.49% molar, randomly distributed. Example 14
Copolymerization of ethylene with 1-hexene
Ethylene and 1-hexene were copolymerized. To do this, the same procedure as in example n ° 12 was used, except that once the solvent had been added and before pressurizing the reactor, 16 ml of dry and freshly distilled 1-hexene (33.7 % hexene in the load). 13 ml of a MAO solution in toluene (1.5 M total aluminum and 0.1 g of the catalyst are used. After 30 minutes of polymerization, 1.80 g of polymer (2.02 x 10<sup>5</sup> g PE / mol Zr * h * atm). The 1-hexene content in the copolymer, determined by<sup>13</sup>C-NMR, was 1.33% molar, distributed randomly.
Example 15
Ethylene polymerization
13 ml (31.8 mmol of
Al) of MAO, from a 10% solution of aluminum in toluene (available from Witco). 0.1 g of a [cyclopentadienyl (3-trimethylsiloxypropyl) cyclopentadienyl] zirconium dichloride catalyst prepared as described in Example 10 (35.77 µmol Zr) on aluminum phosphate support is added to this solution. The polymerization reaction was maintained at a temperature of 70<sup>°</sup>C and at an ethylene pressure of 4,132 bar (4 atm) for 30 minutes. When the reaction was judged to be complete, the pressure was rapidly reduced and acidified methanol was added. 2.16 grams of polyethylene were obtained. Activity 0.24 x 10<sup>4</sup> g PE / (mol Zr * h * atm).
Example 16
Heterogenization of bis [(3-trimethylsiloxypropyl) cyclopentadienyl] zirconium dichloride on silica
0.220 g of bis [(3-trimethylsiloxypropyl) cyclopentadienyl] zirconium are dissolved in 15 ml of toluene, then 0.7 ml of a 10% solution of MAO in toluene (commercialized by Witco) is added, and the mixture is kept in stirring at room temperature. 15 minutes later, the resulting solution is poured into a 100 ml bottle containing 3 g of XPO-2407 saline (commercialized by Grace), which has been previously calcined at a temperature of 200<sup>°</sup>Cyse is kept in mechanical agitation for 1 hour at a temperature of 40<sup>°</sup>C. After the reaction time has elapsed, the solid is separated by filtration and washed with consecutive fractions of toluene to a total volume of 1 l. The heterogeneous catalyst is finally vacuum dried for 24 hours. The Zr and Al content determined by ICP is 1.15% and 0.7% respectively.
Example 17
Heterogenization of bis [3-trimethylsiloxypropyl) cyclopentadienyl] zirconium dichloride on silica
The procedure for the heterogenization of bis [3-trimethylsiloxypropyl) cyclopentadienyl] zirconium dichloride is that described in example 16, but previously treating the salt under vacuum before putting it in contact with the premix of the organometallic compound and the MAO. The Zr and Al content determined by ICP are 1.2% and 0.7% respectively.
Example 18
The polymerization reaction is carried out following the procedure and conditions described in example 11, but adjusting the temperature of the reactor is 90<sup>°</sup>C. 10 ml of a 10% MAO solution in toluene (commercially available from Witco) (15 mmol of Al) and 0.079 g (0.01 mmol of Zr) of the heterogeneous catalyst prepared according to example 16 are injected into the reactor. The polymerization reaction is maintained at a temperature of 90<sup>°</sup>C and an ethylene pressure of 4 atm for 15 minutes. At the end of the reaction the pressure in the reactor is reduced and acidified methanol is added. 2.4 grams of polymer are obtained with a molecular weight of 165,600.
Example 19
The polymerization reaction is carried out following the procedure and conditions described in example 18. 10 ml of a 10% MAO solution in toluene (commercially available from Witco) and 0.075 are injected into the reactor g (0.01 mmol of Zr) of the heterogeneous catalyst prepared following example 17. The polymerization reaction is maintained at a temperature of 90<sup>°</sup>C and at an ethylene pressure of 4 atm for 15 minutes. At the end of the reaction the pressure in the reactor is reduced and acidified methanol is added. 2.8 grams of polymer are obtained.
Contents3
2 sheets
Sheet 1 Sheet 2
16 members in 8 offices
Priority claims5
| Document | Office | Kind | Date |
|---|---|---|---|
| 19960002310 | Spain | – | |
| 9602310 | Spain | A | |
| 9602310 | Spain | A | |
| 97500187 | – | – | – |
| ES19960002310 | – | – | – |
Members16
| Document | Office | Kind | |
|---|---|---|---|
| NO975049D0 | Norway | D0 | |
| NO975049L | Norway | L | |
| EP0839836A1 | European Patent Office (EPO) | A1 | |
| JPH10226709A | Japan | A | |
| EP0839836B1 | European Patent Office (EPO) | B1 | |
| AT198210T | Austria | T | |
| ATE198210T1 | Austria | T1 | |
| DE69703728D1 | Germany | D1 | |
| ES2154017T3This record | Spain | T3 | |
| DE69703728T2 | Germany | T2 | |
| PT839836E | Portugal | E | |
| US2003195109A1 | United States of America | A1 | |
| US2005065019A1 | United States of America | A1 | |
| NO318716B1 | Norway | B1 | |
| US7211538B2 | United States of America | B2 | |
| JP3955140B2 | Japan | B2 |
2 legal events, as the office reported them to INPADOC
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Numbers
- Publication
- 2154017
- Publication, DOCDB
- 2154017
- Publication, EPODOC
- ES2154017T
- Application
- 97500187
- Application, DOCDB
- 97500187
- Application, EPODOC
- ES19970500187T
Titles2
- Spanish
- SISTEMAS CATALITICOS PARA LA POLIMERIZACION Y COPOLIMERIZACION DE ALFA-OLEFINAS.
- English
- CATALYTIC SYSTEMS FOR THE POLYMERIZATION AND COPOLYMERIZATION OF ALFA-OLEFINS.
Classification
- CPC, 7
- C07F17/00
- C08F4/61912
- C08F4/61916
- C08F4/61922
- C08F10/00
- C08F110/02
- C08F210/16
- IPC, 12
- C07F17 00
- C08F4 02
- C08F4 60
- C08F4 619
- C08F4 6192
- C08F4 64
- C08F4 659
- C08F4 6592
- C08F10 00
- C08F10 04
- C08F110 02
- C08F210 16