| abstract |
A compound of formula (I) wherein at least one of (a) R 1 and R 6 or (b) R 2 and R 3 or (c) R 4 and R 5 comprises an electron withdrawing group, if necessary Adhesive or sealant composition comprising a polymerization initiator. New compounds of formula I are also described and claimed. Adhesive compositions can be used, for example, to bond glass and metal surfaces. Specific biocompatible adhesives for medical use are included.n n n Formula I |