Xiaoling Li

US Patent:

52888274, Feb 22, 1994

Filed:

Feb 17, 1993

Appl. No.:

8/018667

Inventors:

Xiaoling Li - Dobbs Ferry NY
Bret Berner - Scarsdale NY

Assignee:

Ciba-Geigy Corporation - Ardsley NY

International Classification:

C08F23008

US Classification:

526279

Abstract:

A new polymer, the feed monomers and molar percents of which, exclusive of a polymerization initiator and crosslinker, are: A. (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; B. (I) 42 mole % to 58 mole % of a siloxy silane of formula I, (II) 21 mole % up to less than 42 mole % of an unsubstituted alkyl (meth)acrylate of formula II, (III) 0 to 5 mole % of a Group A monomer, and (IV) 0 to 29 mole % of an additional vinylic copolymerizable monomer, or C. (I) 16 mole % up to less than 42 mole % of a siloxy silane of formula I, (II) 42 mole % of 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, 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.

US Patent:

53763785, Dec 27, 1994

Filed:

Nov 4, 1993

Appl. No.:

8/148040

Inventors:

Xiaoling Li - Dobbs Ferry NY
Bret Berner - Scarsdale NY

Assignee:

Ciba-Geigy Corp. - Ardsley NY

International Classification:

A61L 1558

US Classification:

424448

Abstract:

A new polymer, the feed monomers and molar percents of which, exclusive of a polymerization initiator and crosslinker, are: A. (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; B. (I) 42 mole % to 58 mole % of a siloxy silane of formula I, (II) 21 mole % up to less than 42 mole % of an unsubstituted alkyl (meth)acrylate of formula II, (III) 0 to 5 mole % of a Group A monomer, and (IV) 0 to 29 mole % of an additional vinylic copolymerizable monomer; or C. (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; where formula I is ##STR1## where formula II is ##STR2## in which R. sub. 3 is hydrogen or methyl; and R. sub.