Pressure sensitive adhesive compositions
AssigneeJohnson & Johnson
InventorsCharles H. Beede, Theodore Blumig
Life of this patent
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Abstract
Surgical pressure sensitive adhesive compositions having improved long term skin adhesion characteristics comprising a polyacrylate, rubber, or polyolefin pressure sensitive adhesive and a cross-linked hydrophilic random interpolymer. The interpolymer comprises an ester of an .alpha.,.beta.-olefinically unsaturated carboxylic acid and an alcohol having a quaternary ammonium group; an .alpha.,.beta.-olefinically unsaturated comonomer; and a difunctional cross-linking monomer. The adhesive compositions are useful in surgical adhesive tapes, adhesive bandages, and like items comprising a pressure sensitive adhesive.
Claims8
An improved pressure sensitive adhesive composition comprising from about 82 to about 97.5 parts by weight of a pressure sensitive adhesive polymer and, correspondingly, from about 2.5 to about 18 parts by weight of a non-tacky, cross-linked, hydrophilic random interpolymer, said interpolymer comprising:
- (A) from about 10 to about 90 parts by weight of a monomeric ester of an .alpha.,.beta.-olefinically unsaturated carboxylic acid and a monohydric or polyhydric alcohol having a terminal quaternary ammonium group, said ester having the structure:
- ##STR10## wherein R is selected from the group consisting of hydrogen and C.sub.1 to C.sub.4 alkyl;
- R.sub.1 is selected from the group consisting of C.sub.1 to C.sub.4 alkylene and hydroxy substituted C.sub.1 to C.sub.4 alkylene;
- each R.sub.4 is selected from the group consisting of C.sub.1 to C.sub.4 alkyl;
- and X.sup.- is an anion sufficiently acidic to form a salt with amino nitrogen;
- (B) correspondingly, from about 90 to about 10 parts by weight of an .alpha.,.beta.-olefinically unsaturated comonomer;
- and
- (C) at least 0.02 part by weight of a cross-linking agent comprising a difunctional monomer selected from the esters and amides of .alpha.,.beta.-olefinically unsaturated acids selected from the group consisting of the compounds defined by structural formulas I, II and III below:
- ##STR11## wherein R is hydrogen or C.sub.1 to C.sub.4 alkyl;
- R.sub.3 is C.sub.1 to C.sub.6 alkylene;
- and n is an integer from 1 to 3;
- ##STR12## wherein R is hydrogen or C.sub.1 to C.sub.4 alkyl;
- and R.sub.3 is C.sub.1 to C.sub.6 alkylene;
- and ##STR13## wherein R is hydrogen or C.sub.1 to C.sub.4 alkyl;
- and Y is selected from the group consisting of ##STR14## and ##STR15## wherein R.sub.4 is selected from the group consisting of hydrogen and C.sub.1 to C.sub.5 alkyl;
- and each R.sub.5 is selected from the group consisting of hydrogen and --CH.sub.2 OH;
- provided, however, that at least one R.sub.5 is --CH.sub.2 OH;
- said comonomer comprising (a) at least 10% by weight of the total weight of monomers (A) and (B) of an acid comonomer or (b) at least 20% by weight of the total weight of monomers (A) and (B) of an amide comonomer, or (C) at least 10% by weight of the total weight of monomers (A) and (B) of a combination of acid and amide comonomers, said combination containing at least 5% by weight of the total weight of monomers (A) and (B) of an acid comonomer.
Dependencies are inferred from the claim text.