Photosetting adhesive from unsaturated oligomer, photoinitiator, and betaine-forming mixture of unsaturated tert.amine and unsaturated acid

Abstract

A photo-hardenable adhesive composition particularly suitable for use in the bonding of glass to other materials, especially plastics, as in the production of safety glass and armoured glass laminates and comprising (A) a photopolymerisable ester of an .alpha.,.beta.-ethylenically unsaturated acid and a hydroxylated urethane or urea and having a moleculare weight of 500 to 10,000 (B) a photoinitiator (C) a substituted or unsubstituted aliphatic or cycloaliphatic N,N-dialkylamino alcohol ester of an .alpha.,.beta.-ethylenically unsaturated carboxylic acid, said alcohol having an alkylene moiety of up to six carbon atoms between hydroxy and the amino functions, and (D) an .alpha.,.beta.-ethylenically unsaturated carboxylic acid in an amount equal to one mole per mole of C, (C) and (D) being capable of reacting together to form a betaine, and preferably (E) at least one further copolymerisable monomer or oligomer and which may comprise an excess of (C) or (D) over equimolar.

Dependencies are inferred from the claim text.