Improvements in the bonding of surfaces

摘要

A bonding composition consists of an amine solution comprising from 1 to 30% poly N-vinyl-pyridine, poly(ethyleneimine) or an amine of general formulae or where R is a C1-8 alkyl, a phenyl, tolyl, xylyl, benzyl, phenylethyl, cyclopentyl or cyclohexyl radical, R1 is hydrogen, a C1-4 alkyl, a C6-8 aryl, a C7-8 aralkyl, or a C5-6 cycloalkyl, R2 is a C1-8 alkyl, or a C1-8 alkenyl, R3 is hydrogen or C1-8 alkyl and R4 represents the atoms necessary to complete a 5- or 6-membered heterocyclic nucleus, and from 99 to 70% of a volatile solvent for the amine is applied to a surface, a further coating applied to this or to the surface to be bonded thereto, the further coating being an adhesive composition comprising alpha-cyanoacrylate monomer of formula where R1 is an alkyl radical of one to sixteen carbon atoms, a cyclohexyl radical or a phenyl radical the two surfaces brought together and the compositions polymerized. Specification 938,724 is referred to.