Pressure sensitive adhesive reaction product of bicyclic amide acetal and acrylate interpolymer

Claim 1

A pressure-sensitive adhesive composition comprising the reaction product of: (1) a normally tacky interpolymer derived by the addition polymerization of 100 parts by wegiht of a monomer mixture consisting essentially of (a) at least 40 parts of a C 4 -C 18 alkyl acrylate or methacrylate; (b) from 0.5-10 parts of an ethylenically unsaturated monomer having at least one carboxylic acid or anhydride group (c) any balance selected from the group consisting of (i) a C 3 -C 10 vinyl ester of an alkanoic acid, and (ii) a methyl or ethyl ester or acrylic acid or methacrylic acid; (2) from 0.1-10% by weight based on said interpolymer (1) of a bicyclic amide acetal corresponding to the formula: ##STR2## where R represents a substituent selected from the group consisting of H, alkyl and aryl; R 1 represents a substituent selected from the group consisting of H, alkyl, aryl, alkaryl, and either alkylene or arylene attached to another bicyclic amide acetal radical; and R 2 represents a substituent selected from the group consisting of H, alkyl, aryl, alkaryl, alkoxy, and alkylene attached to another bicyclic amide acetal radical.