Copolymer of (meth)acryloxy-alkyl-siloxysilane and alkyl(meth)acrylates and the use thereof as pressure sensitive adhesives
 A new polymer, the feed monomers and molar percents of which, exclusive of a polymerization initiator and crosslinker, are: PA1 A. PA2 (I) 42 mole % to 58 mole % of a siloxy silane of formula I, PA2 (II) 42 mole % to 58 mole % of an unsubstituted alkyl (meth)acrylate of formula II, PA2 (III) 0 to 5 mole % of a Group A monomer, and PA2 (IV) 0 to 16 mole % of an additional vinylic copolymerizable monomer; PA1 B. PA2 (I) 42 mole % to 58 mole % of a siloxy silane of formula I, PA2 (II) 21 mole % up to less than 42 mole % of an unsubstituted alkyl (meth)acrylate of formula II, PA2 (III) 0 to 5 mole % of a Group A monomer, and PA2 (IV) 0 to 29 mole % of an additional vinylic copolymerizable monomer, or PA1 C. PA2 (I) 16 mole % up to less than 42 mole % of a siloxy silane of formula I, PA2 (II) 42 mole % of 58 mole % of an unsubstituted alkyl (meth)acrylate of formula II, PA2 (III) 0 to 5 mole % of a Group A monomer, and PA2 (IV) 0 to 36 mole % of an additional vinylic copolymerizable monomer, where formula I is ##STR1## where formula II is ##STR2## where Group A is a vinylic acid or a (meth)acrylate as defined herein. Methods of manufacture of the polymer and the use thereof as a pressure adhesive, especially a transdermal and/or transmucosal delivery system pressure sensitive adhesive, are also claimed. 
Ciba-Geigy Corporation
C Y
C08F Y10S
inventional additional
Bret Xiaoling
Berner Li