Copolymer of (meth)acryloxy-alkyl-siloxysilane and alkyl(meth)acrylates and the use thereof as pressure sensitive adhesives

Claim 1

A polymer having a polymerization feed mixture of (a) an effective amount of a polymerization initiator, (b) 0 to 5 mole %, based on the total of all monomers present, of a vinylic copolymerizable crosslinker; and (c) one of the following groups (i), or (iii); where (i) is (I) 42 mole % to 58 mole % of a siloxy silane of formula I, (II) 42 mole % to 58 mole % of an unsubstituted alkyl (meth)acrylate of formula II, (III) 0 to 5 mole % of a Group A monomer, and (IV) 0 to 16 mole % of an additional vinylic copolymerizable monomer of Group B; or where (iii) is (I) 16 mole % up to less than 42 mole % of a siloxy silane of formula I, (II) 42 mole % to 58 mole % of an unsubstituted alkyl (meth)acrylate of formula II, (III) 0 to 5 mole % of a Group A monomer, and (IV) 0 to 36 mole % of an additional vinylic copolymerizable monomer of Group B; in which formula I is ##STR11## in which R 1 is hydrogen or methyl; R 2 is alkylene of 1-6 carbon atoms; and n is an integer of from 0 to 2; and where formula II is ##STR12## in which R 3 is hydrogen or methyl; and R 4 is methyl or a linear or branched chain C 2-10 alkyl which is unsubstituted; and where Group A monomer is a monomer selected from (meth)acrylic acid, maleic acid, fomaric acid, itaconic acid, cinnamic acid, crotonic acid, 2-(methy)acroyloxyethyl sulfonic acid, 2-(meth)acrylamido-2-methylpropane sulfonic acid, vinyl sulfonic acid, p-styrene sulfonic acid, allyl sulfonic acid and monomers of formula III ##STR13## in which R 5 is hydrogen or methyl; and R 6 is a substituted linear or branched alkyl group of up to 10 carbon atoms, said substituent being selected from the group consisting of hydroxy, C 1-4 alkoxy, Cl, Br, F, carboxy, C 1-4 alkoxycarbonyl, C 1-4 alkylcarbonyloxy, and amino; and said additional vinylic copolymerizable monomer of Group B is neither a polymerization initiator, a crosslinker, nor a member of the group of compounds of formulae I, or II, nor a member of Group A monomers as defined above, but is a mono-unsaturated monomer which is copolymerizable with compounds of formulae I, II, and Group A monomers.