Process for making hydrolyzable silylated polymers

(54) Title: PROCESS FOR PREPARING (57) Summary:

HYDROLYSABLE SILILATED POLYMERS (30) Unionist Priority: 03/27/2007 us 11 / 728,898 (73) Holder (s): Momenlive Performance Materials Inc.

(72) Inventor (s): Anantharaman Dhanabalan, Arakali Sreenivasarao Radhakrishna, Mayanglambam Rebika Deví, Narayana Padmanabha, Suneel Kunamaneni (74) Attorney (s): Alexandre Ferreira (86) International Application: pct 11Ξ2008003949 of 26/03/2008 (87 ) International Publication: wo 2008 / 118460de 02/10/2008 “PROCESS FOR THE PREPARATION OF HYDROLYSABLE SILILATE POLYMERS”

Field of the Invention

This invention relates to a new process for the preparation of certain hydrolyzable silylated polymers, particularly polymers terminated in alpha-substituted alkoxy alkyl silyl, by the reaction of a certain silylorganohalide, particularly an alpha-substituted haloalkylalkoxysilane, with a cyanate salt in the presence of polymers of active functional hydrogen.

Fundamentals of the Invention

Hydrolyzable silylated polymers are useful for preparing wet curable compositions at room temperature, such as coatings, adhesives, sealants, sealants and the like. Inherently, rapid wet-curing characteristics of alpha-substituted hydrolyzable alkyl silyl-terminated polyurethane polymers, compared to their gamma-substituted counterparts, make them desirable, as they potentially allow the use of smaller amounts of catalysts. environmentally harmful tin and offer curing compositions free of Harmful Air Pollutants (PAHs).

The preparation of hydrolyzable silylated polymers is generally known in the art. A commonly used commercial method for preparing hydrolyzable silylated polymers generally involves two steps. The first stage comprises the synthesis of hydrolyzable silane replaced with isocyanate by heating the hydrolyzable silane with corresponding carbamate-functional at elevated temperatures and under reduced pressures. This step requires ineffective and costly cracking of the silane with functional carbamate in specialized reactors that allow efficient and parallel separation of the silane with functional isocyanate formed in this way, from reagents and by-products of this, and subsequent purification. Due to the high reactivity of the silanes substituted with isocyanate, special care is required to prevent the polymerization of the isocyanate group and hydrolysis of the silyl group during storage of these materials, before use. In the second stage, the silane with functional isocyanate is reacted with polymers containing active hydrogen, such as polyols, in a differently configured reactor.

In an original way, it was recently verified that it is possible to prepare hydrolyzable silylated polymers in one step, without the need to first prepare, purify and store the silanes with functional isocyanates and, subsequently, react them with corresponding active functionalized hydrogen polymers.

Summary of the Invention

The present invention relates to a process for preparing hydrolyzable and curable wet silylate polymers which comprises reacting under substantially anhydrous conditions (a) at least one hydrolyzable halohydrocarbylsilane, (b) at least one cyanate salt and (c) at least a polymer containing active hydrogen, and, optionally, at least one catalyst and / or inert solvent, and, optionally, at elevated temperatures.

The hydrolyzable silylated polymers of the present invention are suitable for coatings, adhesives and sealants in construction, automotive, marine, aerospace, consumer and industrial applications.

Detailed Description of the Invention

The present invention is directed to a new one-step process for preparing hydrolyzable silylated polymers. In this inventive process, isocyanatohydrocarbilsilano generated in the site (in-situ) that is obtained by the reaction of halohydrocarbilsilane containing at least one hydrolyzable group with a cyanate salt, reacts with an active hydrogen polymer, optionally, in an organic solvent and / or in presence of the catalysts and, optionally, at elevated temperatures, to obtain a hydrolyzable silylated polymer.

The single step process for preparing hydrolyzable silylated polymers involves the capture at the site of the isocyanatohydrocarbilsilane, generated by the reaction of halohydrocarbilsilane with a cyanate salt, optionally, in an organic solvent, by the active hydrogen polymers and, more specifically, polymers with hydroxyl functional.

As such, the present process can use different types of polymers containing active hydrogen. In one embodiment, these polymers containing active hydrogen include polymers with functional hydroxyl, such as non-limiting examples of polyethylene glycol of various molecular weights; polypropylene glycols of various molecular weights; polyols based on alpha-substituted glycols, such as polybutylene glycol, polyhexylene glycol, and the like; polyurethanes formed by the reaction of polypropylene glycols, polyethylene glycols, copolymers of polyethylene glycol and polypropylene glycol and the like; copolymers of polyethylene glycol and polypropylene glycol; polyester polyols; polycarbonate polyols; polybutadiene diols; polycaprolactone diols; silanol; aliphatic diols with siloxane structure; high functionality triols and polyols, such as tetraols and pentaols; some other compounds containing active hydrogen, such as primary and secondary amines, for example, Jeffamine (amine-terminated polypropylene glycol); and carboxylic acids and the like, can be used in this reaction.

In another embodiment, suitable polyols include polyether polyol, polyetherester polyols, polyesterether polyols, polybutadiene polyols, polyols added with acrylic components, polyols dispersed in acrylic component, polyols added with styrene, polyols dispersed in styrene, polyols added with vinyl, dispersed polyols vinyl, urea dispersed polyols, polycarbonate polyols, polyoxy polypropylene polyol, mixed poly (oxyethylene / oxypropylene) polyether polyol, polybutadienediols, polyoxyalkylene diols, polyoxyalkylene triols, polytetramethylene glycols, polycaprolactone diols and triols, and mixtures of polyols containing various active hydrogens, such as monols, diols, triols and highly functional polyols.

In yet another embodiment, specific non-limiting examples of polyether polyols are polyoxyalkylene polyol, particularly, linear and branched poly (oxyethylene) glycol, poly (oxypropylene) glycol, copolymers thereof and combinations thereof. Corrupted or modified polyether polyols, typically called polymer polyols, are those polyether polyols that have at least one ethylenically unsaturated monomer polymer dispersed therein. Representative, non-limited modification of polyether polyols include polyol polyether polyoxypropylene in which poly (styrene acrylonitrile) or polyurea is dispersed, and poly (oxyethylene / oxypropylene) polyethers polyols in which poly (styrene acrylonitrile) or polyurea is dispersed. Corrupted or modified polyether polyols comprise dispersed polymer solids. Suitable polyesters of the present invention include, but are not limited to, aromatic polyether polyols, such as those made with phthalic anhydride (PA), dimethyl terthalate (DMT), polyethylene terephthalate (PET) and aliphatic polyesters, and the like. In one embodiment of the present invention, the polyether polyol is selected from the group consisting of ARCOL® U-1000 polyol, Bayer AG's Hyperlite® E-848, Bayer AG's ACCLAIM® 8200 and 12200, Voranol® Dow BASF, Stepanpol® by Stepan, Terate® by Invista and their combinations.

Similarly, hydroxyl-terminated polyurethanes obtained by reacting different polyols as listed above, with different diisocyanates and / or different polyisocyanates, such as non-limiting examples of diisocyanates, such as 2,4-toluenediisocyanate (TDI), 2,6 -toluene diisocyanate, 4,4'-diphenyl-methanediisocyanate (MDI), 2,4'-diphenylmethanediisocyanate, isoforono diisocyanate (“IPDI”), isomer 4,4'-dicyclohexylmethanediisocyanate, hexamethylene diisocyanate (HDI) Desmodur N and the like, and mixtures thereof.

The molecular weight of the hydroxyl-terminated polyols or polyurethanes is specifically in the range between 300 and 25,000 grams per mole, more specifically between 1,000 and 16,000 grams per mole, much more specifically between 5,000 and 14,000 grams per mole and even more specifically between 8,000 and 12,000 mol grams, as measured by gel permeation chromatography, as opposed to polystyrene standards.

To prepare active hydroxyl-terminated polyurethanes useful in this invention, at least a slight molar excess of the hydroxyl equivalents (-OH groups) with respect to the isocyanate equivalents (-NCO groups) is employed to terminate the polymer chains with hydroxyl groups. The specific molar ratio of NCO to OH is approximately 0.2 to 0.95, and more specifically between 0.5 to 0.85, depending on the polyol in use.

In such an embodiment, the reagent employed in the practice of the present invention to prepare the hydrolyzable silylated polymer is one or more hydrolyzable substituted halo hydrocarbylsilane according to Formula (1):

YG¹SiX¹X²X³(1) where:

each occurrence of Y is independently selected from the group consisting of chlorine, bromine and iodine;

each occurrence of G¹ it is independently a divalent hydrocarbilene group, optionally containing heteroatom substituted with one or more oxygen atoms, and selected from the group consisting of alkylene, alkenylene and arachylene containing from 1 to 20 carbon atoms;

each occurrence of X¹ is independently a hydrolyzable group selected from the group consisting of R¹O-, R¹C (= O) O-, R¹R²C = NO- and R¹R²NO-, where each occurrence of R¹, R² and R³ it is independently a monovalent hydrocarbil selected from the group consisting of hydrogen, and alkyl, alkenyl, aryl and aralkyl containing from 1 to 10 carbon atoms;

each occurrence of X² is independently selected from the group consisting of R¹O-, R¹C (= O) O-, R¹R²C = NO-, R¹R²NO- and R³, in which each occurrence of R¹, R² and R³ it is independently a monovalent hydrocarbil selected from the group consisting of hydrogen, and alkyl, alkenyl, aryl, and aralkyl containing from 1 to 10 carbon atoms; and each occurrence of X³ is independently selected from the group consisting of R¹O-, R¹C (O =) O-, R¹R²C = NO-, R¹R²NO- and R³-, where each occurrence of R¹, R² and R³ it is independently a monovalent hydrocarbil selected from the group consisting of hydrogen, and alkyl, alkenyl, aryl, and aralkyl containing from 1 to 10 carbon atoms.

In one embodiment, the specific non-limiting examples of Y are Cl-, Br- and I-, more specifically Br- and Cl-, and much more specifically CI-.

In another modality, the G¹ it is specifically a hydrocarbilene group in which the carbon atom that is replaced with the Y group is a primary carbon atom. In yet another modality, when groups G¹ contain at least two carbon atoms, the carbon atom adjacent to the carbon containing the Y group contains at least one hydrogen and more specifically two hydrogen atoms. In yet another modality, specific delimited examples of G¹ including alkylene, such as, methylene, ethylene, propylene, butylenes, 3-methyl pentylene, bis- (ethylene) cyclohexane; alkenylene such as CH₂CH = CH-, -CH₂CH = CHCH₂-, -CH₂CH₂CH (CH₃) = CH₂CH₂-; aralkylene, such as CH₂CH₂Ç₆H₄CH₂CH₂-, -CH₂CH₂OC₆H₄OCH₂CH₂-, where C₆H₄ represents a phenylene group, and the like.

In another modality, X¹ is R¹O- including specific non-limiting examples of methoxy, ethoxy, isopropoxy, propoxy, butoxy and more specifically methoxy and ethoxy.

In yet another modality, X² and X³ are selected from the group consisting of R¹O-, including specific non-limiting examples of methoxy, ethoxy, isopropoxy, propoxy, butoxy and more specifically methoxy and ethoxy; and R³-, including specific non-limiting examples of methyl, ethyl, propyl, phenyl, 2-phenylethyl and more specifically methyl and ethyl.

In one embodiment of the present invention, the hydrolysable alpha-chloromethylsilanes suitable for use are at least one selected from the group consisting of chloromethyltriethoxysilane, chloromethyltrimethoxysilane, chloromethyltripropoxysilane, chloromethylmethoxymethylsilane, chloromethylmethoxymethylsilane, chloromethylethylmethylmethylmethylmethylmethylmethylsmethylsmethylsmethyl, chloromethylsomethylmethylmethylmethylmethylmethylmethylmethylmethylmethylmethylmethoxylmethylmethylmethylmethylmethoxylethylmethylmethylmethylmethoxylethylmethylmethylmethylmethoxylethylmethylmethoxy

In another embodiment of the present invention, the hydrolysable halohydrocarbylsilane suitable for use is at least one selected from the group consisting of 2chloroethyltriethoxysilane, 3-chloropropyltrimethoxysilane, 6-chlorohexyltripropoxysilane, 2chloroethyldiethoxymethylsilane, 3-chloropropyl dimethyl, 4-chloropropylimethoxy, 4-chloropropylmethoxy chloroethylethoxydimethylsilane, 3-chloropropylmethoxydimethylsilane and mixtures thereof.

The time required to cure hydrolyzable silylated polymers is partly dependent on the structure of group G¹. Hydrolyzable silylated polymers that contain only a single carbon atom between the silicon atom and the nitrogen atom of the carbamate functional group hydrolyzes much more quickly than when two or more carbon or oxygen atoms separate the silicone atom and the nitrogen atom . Groups G¹ of divalent hydrocarbilens that are cyclic or branched additionally slow down cure rates. In one embodiment, mixtures of hydrolyzable halohydrocarbylsilanes can be used in the method of preparing hydrolyzable silylated polymers to achieve desirable cure rates. Specific non-limiting examples of the reagents include mixtures of chloromethyltrimethoxysilane and 3-chloropropyltrimethoxysilane, chloromethyltrimethoxysilane and 5-chloro-3methylpentyltrimethoxysilane, chloromethyltrimethoxysilane and 2-chloroethyltrimethoxysilane and the like. The molar ratio of haloalkylsilanes where G¹ is a carbon for haloalkylsilanes where G¹ is 2 to 30 carbon atoms is approximately 95 to 5, more specifically approximately 80 to 20 and much more specifically approximately 80 to 60. In another embodiment, hydrolyzable silylated polymers containing G groups¹ different can be mixed combined.

According to another embodiment of the process of this invention, another reagent of the process of the present invention is a cyanate salt, which is reacted with the hydrolyzable halohydrocarbylsilane in the presence of an active hydrogen containing polymer to produce a hydrolyzable silylated polymer. The cyanates that can be used in the practice of this invention are metal cyanates, for example, but not limited to, lithium, sodium, potassium, rubidium, barium, strontium, silver, lead, mercury, calcium cyanates, and the like, and ammonium cyanate and phosphonium cyanate. According to a specific embodiment of the process of the invention, the cyanate is potassium cyanate.

In another embodiment of this invention, the new process is employed to produce a hydrolyzable silylated polymer by reacting a cyanate salt, with a hydrolyzable halohydrocarbylsilane and an active hydrogen containing polymer, such as the non-limited example of a polymer with functional hydroxyl, either in the presence of a phase transfer catalyst at elevated temperatures or at a controlled rate of reaction or controlled reaction conditions, such as, catalyst temperature and quantity.

Examples of phase transfer catalysts include quaternary phosphonium salts, such as, tetra-n-butylphosphonium bromide, tetra-n-butylphosphonium chloride, methyltri-n-butylphosphonium chloride, methyltri-n-butylphosphonium bromide, bromide nbutyltriphenylphosphonium, n-butyltriphenylphosphonium chloride, methyltriphenylphosphonium chloride and methyltriphenylphosphonium bromide, with particular preference being given to methyltriphenylphosphonium chloride, n-butyltriphenylphosphonium bromide and tetra-n-butylphosphonium bromide.

According to another embodiment of the invention, the new process for producing a hydrolyzable silylated polymer can be carried out in the presence or in the absence of an organic solvent, but the use of an organic solvent, in particular a polar aprotic solvent, is preferred. When an organic solvent is used, the amount is preferably 100 to 1000 weight percent, more preferably 20 to 800 weight percent, and more preferably 400 to 600 weight percent, in each case based on the amount hydrolyzable halocarbylsilane compound supplied.

Examples of polar aprotic organic solvents include those that aid the reaction, for example, acetone, Ν, Ν-dimethylformamide, dimethyl sulfoxide, N-methyl-2-pyrrolidone, gamma-butyrolactone, diethylene glycol dimethyl ether and diethylene glycol diethyl ether, with preference being given to acetone, Ν, Ν-dimethylformamide and N-methyl-2-pyrrolidone, more preferably Ν, Ν-dimethylformamide.

According to a specific embodiment of the invention, the solvent is dimethylformamide.

According to an embodiment of the invention, the new process for producing a hydrolyzable silylated polymer is carried out both at room temperature and at elevated temperatures of approximately 80 to approximately 140 ° C. In another embodiment of the invention, the process is carried out at a temperature of approximately 90 to approximately 120 ° C. In yet another embodiment of the invention, the process is carried out at a temperature of approximately 100 to approximately 110 ° C.

An additional catalyst can be employed in the process of the present invention.

Suitable additional catalysts include organoamine and organo-tin compounds for this purpose. Other metal catalysts can be used in place of, or in addition to, organo-tin compound. Suitable non-limiting examples of additional catalysts include tertiary amines, such as bis (2,2'-dimethylamino) ethyl ether, trimethylamine, triethylenediamine, 1,8-diazabicyclo [5.4.0] undec-7-ene, triethylamine, N- methylmorpholine, Ν, Ν-ethylmorpholine, N, N-dimethylbenzylamine, Ν, Ν-dimethylethanolamine, N, N, N ', N'-tetramethyl-1,3butanediamine, pentamethyldipropylenetriamine, triethanolamine, triethylenediamine, 2 - {[2- (2- ) ethyl] methylamino} ethanol, pyridine oxide, and the like; strong bases, such as alkaline earth metal and alkali hydroxides, alkoxides, phenoxides, and the like; acidic metal salts of strong acids, such as ferric chloride, stannous chloride, antimony trichloride, bismuth chloride and nitrate, and the like; chelates of various metals, such as those that can be obtained from acetylacetone, benzoylacetone, trifluoroacetylacetone, ethyl acetoacetate, salicylaldehyde, cyclopentanone-2-carboxylate, acetylacetoneimine, bis-acetylaceone-alkylenediimines, various salicylimimines, salicylimimines, salicylalimines , such as, Be, Mg, Zn, Cd, Pb, Ti, Zr, Sn, As, Bi, Cr, Mo, Mn, Fe, Co, Ni, or such ions as MoO₂++, OU₂++, and the like; alcoholates and phenolates of various metals such as Ti (OR)₄, Sn (OR)₄, Sn (OR)₂, AI (OR)₃, and the like, where R is alkyl or aryl of 1 to approximately 12 carbon atoms, and reaction products of alcoholates with carboxylic acids, beta-diketones, and 2- (N, N-dialkylamino) alkanols, such as those already known titanium chelates obtained by it or by equivalent procedures; organic acid salts with a variety of metals, such as alkali metals, alkaline earth metals, Al, Sn, Pb, Mn, Co, Bi, and Cu, including, for example, sodium acetate, potassium laurate, hexanoate calcium, stannous acetate, stannous octoate, stannous oleate, lead octoate, metal dryers such as manganese and cobalt naphthenate, and the like; derivatives of tetravalent tin, As, Sb, and Bi trivalent and pentavalent, and carbonyls of iron and cobalt metal; and combinations thereof. In a specific embodiment of organo-tin compounds which are dialkyl tin salts of carboxylic acids, the non-limiting examples of dibutyltin diacetate, dibutyltin dilaureate, dibutyltin maleate, dilauryl tin diacetate (dibutyltin diacetate) methylaminobenzoate), dibuitilestanhodilaurilmercaptida, dibutyltin-bis (6methylaminocaproate), and the like, and combinations thereof. Similarly, in another specific embodiment, trialkltin hydroxide, dialkltin oxide, dialkltin dialkoxide, or dialkltin dichloride and combinations thereof can be used. Non-limiting examples of these compounds include trimethyltin hydroxide, tributyltin hydroxide, trioctyltin hydroxide, dibutyltin oxide, dioctyltin oxide, dilauryl tin oxide, dibutyltin-bis (isopropoxide) dibutyltin dichloride, dibutyl tinyl dichloride, dichloro dichloride, dichloride dichloride , and the like, and combinations thereof.

In accordance with an embodiment of the present invention, one- or two-part, adhesive or coating formulations incorporating the hydrolyzable silylated polymer above can be prepared by mixing the silylated polymer together and any of the usual functional additives known to those skilled in the art, such as, one or more fillers, plasticizer, thixotropes, antioxidants, UV stabilizers, surfactants, antifoams, adhesion promoters and / or curing catalyst.

The commercial modality of the wet curable polymer of the present invention includes various forms of construction, automotive applications, consumer applications, industrial application, industrial assembly, polyurethane foam, for example, as used for the insulation of roofs, tanks and pipes, applications of transport, for example, RV, subway car, trailers and the like.

The components used in the inventive process can be mixed with each other in any order. After the reaction has reached the desired degree of completion, the resulting hydrolyzable silylated polymer can be isolated and purified by methods already known, that is, by filtration, concentration by distillation, dilution with co-solvents, filtration and distillation.

In the following examples, all parts and percentages are by weight, unless otherwise stated, and are carried out at ambient pressure, that is, approximately 1,000 hPa, and at a temperature generally held in the range of 90 to 120 ° C for one 10 to 24 hour time period. All viscosities reported in the examples are as measured at a temperature of 25 ° C. All the reactions described in the examples were carried out under an atmosphere of inert gas that comprises nitrogen.

Example 1: Synthesis of polypropylene glycol terminated in alpha-substituted silyl:

A solution / dispersion of 5.0 g of chloromethyltrimethoxysilane, 2.9 g of potassium cyanate and 6.25 g of polypropylene glycol (Mn ~ 425, available from Aldrich) in dry dimethylformamide (25 ml) was gradually heated from 90 to 120 ° C and reflux for 24 hours. The reaction is carried out with the addition of 50 ppm of tin catalyst, dibutyltin dilaurate (DBTDL), 6 hours after the beginning of the reaction. Subsequently, the mixture was cooled to room temperature, filtered and concentrated. To this concentrated solution, toluene (100 ml) was added and the precipitated salt was filtered. The solvent was subsequently removed in vacuo to result in substituted alpha-silyl terminated polypropylene glycol. The composition of the product was confirmed by FT-IR and FT-NMR analyzes.

Example 2: Synthesis of polypropylene glycol terminated in alpha-substituted silyl:

The procedure described in Example 1 was carried out with chloromethyltriethoxysilane, instead of chloromethyltrimethoxysilane.

Example 3: Synthesis of polypropylene glycol terminated in alpha-substituted silyl:

The procedure described in example 1 was carried out with chloromethylmethyldimethoxysilane, instead of chloromethyltrimethoxysilane.

Example 4: Synthesis of alpha-substituted silyl-terminated polypropylene glycol:

The procedure described in Example 1 was performed with chloromethylmethyldiethoxysilane, instead of chloromethyltrimethoxysilane.

Example 5: Synthesis of polypropylene glycol terminated in gamma-substituted silyl:

(Method-1) A solution / dispersion of 5.8 g of chloropropyltrimethoxysilane, 2.8 g of potassium cyanate and 6.2 g of polypropylene glycol (Mn ~ 425, obtained from Aldrich) in dry dimethylformamide (25 ml) was gradually heated to 90 to 120 ° C and left to reflux for 24 hours. The reaction is carried out with the addition of 50 ppm of tin catalyst (dibutyltin dilaurate (DBTDL) 6 hours after the start of the reaction. Subsequently, the mixture was cooled to room temperature, filtered and concentrated. To this concentrated solution, toluene (100 ml) was added and the precipitated salt was filtered. The solvent was subsequently removed in vacuo to give substituted silyl gamma terminated polypropylene glycol. The composition of the product was confirmed by FT-IR and FT-NMR analyzes.

Comparative Example 1: Synthesis of polypropylene glycol finished in substituted silyl:

(Method-2) A mixture of 10.0 g of polypropylene glycol (available from Aldrich, Mn - 425), 9.64 g of isocyanatopropyltrimethoxysilane (available in Silicones GE, Trade name: A link-35) and 50 ppm of catalyst tin (dibutyltin dilaurate (DBTDL)) collected in an RB flask fitted with a condenser and a magnetic stirrer was stirred under a nitrogen atmosphere of 80 to 85 ° C for 5 hours to result in the desired product. The composition of the product was confirmed by FT-IR and FT-NMR analyzes.

Example 6: Synthesis of polypropylene glycol terminated in alpha-substituted silyl:

The procedure described in Example 1 was performed with the required molar equivalent of polypropylene glycol (Mn ~ 2700, available from Aldrich), instead of polypropylene glycol (Mn ~ 425).

Comparative Example 2: Synthesis of polypropylene glycol terminated in substituted silyl:

The procedure described in Comparative Example 1 was performed with the required molar equivalent of polypropylene glycol (Mn ~ 2700, available from Aldrich), instead of polypropylene glycol (Mn - 425).

Example 7: Synthesis of alpha-substituted silyl-terminated polyurethane:

The procedure described in Example 1 was carried out with the required molar equivalent of polyurethane polyurethane group terminated in hydroxyl group obtained by reaction of molar excess of polypropylene glycol (Mn ~ 425, available from Aldrich) with isoprone diisociant (available from Aldrich), instead of polypropylene glycol.

Example 8: Synthesis of polyurethane finished in alpha-substituted silyl:

The procedure described in Example 7 was carried out with the required molar equivalent of chloromethyltriethoxysilane, instead of chloromethyltrimethoxysilane.

Example 9: Synthesis of alpha-substituted silyl-terminated polyurethane:

The procedure described in Example 1 was performed with the required molar equivalent of hydroxyl group-terminated polyurethane obtained by reaction of molar excess of polypropylene glycol (Mn - 2700, available from Aldrich) with isoprone diisociant (available from Aldrich), instead polypropylene glycol.

Example 10: Synthesis of polyurethane finished in gamma-substituted silyl:

The procedure described in Example 5 (Method 1) was performed with the required molar equivalent of polyurethane terminated in a hydroxyl group obtained by reaction of a molar excess of polypropylene glycol (Mn ~ 425, available from Aldrich) with the isoprone diisociant (available from Aldrich ), instead of polypropylene glycol.

Comparative Example 3: Synthesis of polyurethane finished in substituted silyl:

The procedure described in Comparative Example 1 (Method 2) was performed with the required molar equivalent of polyurethane terminated in a hydroxyl group obtained by reacting the molar excess of polypropylene glycol (Mn ~ 425, available from Aldrich) with the isoprone diisociant (available from Aldrich), instead of polypropylene glycol.

Comparative Example 4: Synthesis of substituted silyl gamma-ended polyurethane:

The procedure described in Comparative Example 1 (Method 2) was performed with the required molar equivalent of polyurethane terminated in a hydroxyl group obtained by reacting the molar excess of polypropylene glycol (Mn - 2700, available from Aldrich) with the isoprone diisociant (available from Aldrich), instead of polypropylene glycol.

Examples 11 - 18, Comparative Examples 5 - 8:

The usefulness of hydrolyzable silylated polymers was demonstrated by measuring the tack-free time. The process involves casting a film using a film applicator that is 2.5 mm (0.1 inches) thick and recording the time under ambient temperature and humidity, approximately 25 ° C and 50 percent relative humidity, when the film it is no longer sticky to the touch using an index finger. The results are shown in table 1.

Table 1: Tack Free time for the silylated polymers of the present invention. TABLE I

<td>Example Number</td><td>Example Number of the Silylated Polymer</td><td>Catalyst concentration, ppm (dilaurate dibutyltin)</td><td>Tack time Free, minutes</td>

<td>Example 11</td><td>Example 1</td><td> 50</td><td> 5</td>

<td>Example 12</td><td>Example 2</td><td> 50</td><td> 78</td>

<td>Example 13</td><td>Example 6</td><td> 40</td><td> 2.880</td>

<td>Example 14</td><td>Example 7</td><td> 50</td><td> 30</td>

<td>Example 15</td><td>Example 8</td><td> 50</td><td> 1.440</td>

<td>Example 16</td><td>Example 9</td><td> 50</td><td> 1.080</td>

<td>Example 17</td><td>Example 5</td><td> 50</td><td> 7.200</td>

<td>Comparative Example 5</td><td>Comparative Example 1</td><td> 50</td><td> 7.200</td>

<td>Comparative Example 6</td><td>Comparative Example 2</td><td> 50</td><td> 31.700</td>

<td>Example 18</td><td>Example 10</td><td> 1000</td><td> 5.760</td>

<td>Comparative Example 7</td><td>Comparative Example 3</td><td> 1000</td><td> 5.760</td>

<td>Comparative Example 8</td><td>Comparative Example 4</td><td> 1000</td><td> 7.200</td>

Although the process of the invention has been described with reference to certain modalities, it should be understood by those skilled in the art that various changes can be made and equivalents can be replaced by elements of the same without departing from the scope of the invention. In addition, many modifications can be made to adapt a particular situation or material to the teachings of the invention without departing from its scope. Therefore, it is intended that the invention is not limited to the particular modality described as the best method contemplated for carrying out the process of the invention, but that the invention includes all modalities that are within the scope of the appended claims.