Patent ID: 7199249

Claim:
A free-radically polymerizable compound having the structure: A a -L-Z b wherein: each A is independently a free-radically polymerizable group selected from the group consisting of an optionally substituted maleimide, an optionally substituted vinyl ether, an optionally substituted vinyl thioether, an optionally substituted vinyl ester, an optionally substituted fumarate, an optionally substituted vinyl thioester, an optionally substituted diallylamide, an optionally substituted styrenyl, and a norbornyl, and at least one A is alkyl substituted maleimide, each L is independently a covalent bond or a polyvalent organic radical, each Z is a chelating group and is independently a moiety reactive with hydroxyl groups, and at least one Z is a silicate ester, a is 1–200, and b is 1–200, wherein said compound, when added to a free-radically polymerizable adhesive in an adhesion enhancing amount, enhances the adhesion of said adhesive to a substrate by at least 83%.