Crosslinkable graft polymer dispersion of organopolysiloxanes containing hydrogen-siloxane groups and Si-vinyl groups

Claim 2

A process for producing a stable graft polymer dispersion comprising polymerizing a mixture comprising by weight approximately (a) 1 to 99% of an organopolysiloxane mass containing Si-H groups and Si-vinyl groups, and (b) 99 to 1% of a polymerizable vinyl monomer.

Claim 3

A process according to claim 1, wherein each of (a) and (b) is present in about 24 to 76% of (a) plus (b).

Claim 4

A process according to claim 2, wherein (a) comprises at least two different organopolysiloxanes, one of them containing Si-H groups and comprising about 5 to 85% of (a) and another containing Si-vinyl groups and comprising about 95 to 15% of (a).

Claim 5

A process according to claim 3, wherein (a) includes a third organopolysiloxane present in up to about 50% of (a).

Claim 6

A process according to claim 1, wherein the mixture further contains 0.001 to 10% of a polymerization initiator based on the weight of initiator plus (a) plus (b).

Claim 7

A process according to claim 1, wherein the mixture further contains up to about 10% of a molecular weight controller based on the weight of controller plus (a) plus (b).

Claim 8

A process according to claim 3, wherein each of (a) and (b) is present in about 24 to 76% of (a) plus (b), (a) includes a third polysiloxane present in up to about 35% of (a) and the mixture further contains up to about 2% of a molecular weight controller and about 0.1 to 1.5% of a polymerization initiator based on the weight of controller plus initiator plus (a) plus (b).

Claim 9

The product produced by the process of claim 1.

Claim 10

The product produced by the process of claim 7.

Claim 11

The product produced by crosslinking a dispersion produced by the process of claim 1.

Claim 12

A process for producing a stable graft polymer dispersion comprising polymerizing in the presence of a free radical initiator a mixture comprising (a) 1 to 99% of a mixture of at least two different organopolysiloxanes, and (b) 99 to 1% of a polymerizable vinyl monomer selected from the group consisting of an olefin, a vinyl ester of an aliphatic or aromatic acid, an α,β-unsaturated monocarboxylic or dicarboxylic acid or an ester, amide, nitrile, anhydride or fluoro-substitution product thereof, a vinyl aromatic, vinyl chloride, vinylidene chloride, vinylidene fluoride, tetrafluoroethylene, perfluoropropylene, an N-alkenoyl-perfluorosulphonamide, a vinyl ether, allyl alcohol, allyl acetate, isobutene diacetate, 2-methylenepropene-1,3-diol, allylethyl carbonate and allylphenyl carbonate, (c) being made up of about 5 to 85% of an Si-H containing polymethylhydrogensiloxane of the formula ##STR6## wherein a denotes an integer between 0 and 120, b denotes an integer between 0 and 140 and X denotes a methyl group or hydrogen, and about 95 to 15% of an Si-vinyl containing polysiloxane of the formula ##STR7## wherein R 1 is so chosen from alkyl radicals having 1 to 24 carbon atoms, aryl radicals, vinyl radicals and fluoroalkyl radicals having 1 to 24 carbon atoms that the polymer contains 0.0002 to 3% by weight of vinyl groups and c has a value which is such that the viscosity of the polymer varies between 100 and 1,000,000 mPa at 25° C.

Claim 13

A process for producing a stable graft polymer dispersion comprising polymerizing in the presence of a free radical initiator a mixture comprising (a) 1 to 99% of a mixture of at least two different organopolysiloxanes, and (b) 99 to 1% of a polymerizable vinyl monomer selected from the group consisting of an olefin, a vinyl ester of an aliphatic or aromatic acid, an α,β-unsaturated monocarboxylic or dicarboxylic acid or an ester, amide, nitrile, anhydride or fluoro-substitution product thereof, a vinyl aromatic, vinyl chloride, vinylidene chloride, vinylidene fluoride, tetrafluoroethylene, perfluoropropylene, an N-alkenoyl-perfluorosulphonamide, a vinyl ether, allyl alcohol, allyl acetate, isobutene diacetate, 2-methylenepropene-1,3-diol, allylethyl carbonate and allylphenyl carbonate, (c) being made up of about 5 to 85% of an Si-H containing polymethylhydrogensiloxane of the formula ##STR6## wherein a denotes an integer between 0 and 120, b denotes an integer between 0 and 140 and X denotes a methyl group or hydrogen, and about 95 to 15% of an Si-vinyl containing polysiloxane of the formula ##STR7## wherein R 1 is so chosen from alkyl radicals having 1 to 24 carbon atoms, aryl radicals, vinyl radicals and fluoroalkyl radicals having 1 to 24 carbon atoms that the polymer contains 0.0002 to 3% by weight of vinyl groups and c has a value which is such that the viscosity of the polymer varies between 100 and 1,000,000 mPa at 25° C.

Claim 14

The product produced by the process of claim 11.