Patent ID: 6939932

Claim:
A polymerisable adhesive composition for bonding a low surface energy substrate to a similar or different substrate, comprising: a) at least one free-radically polymerisable monomer component, and b) an effective amount of an initiator system for initiating polymerisation of the free-radically polymerisable monomer, said initiator system comprising: a combination of an organoborane and a polyaziridine, in a ratio of aziridine groups to boron atoms of greater than 1.3:1, provided that the initiator system does not contain more than a trace amount of a complex of organoborane with a complexing agent selected from: an amine other than a polyaziridine; a complexing agent comprising at least one hydroxide; a complexing agent comprising at least one alkoxide; or an amidine complexing agent and provided that the initiator system is substantially free of amine.