Radical-curable adhesive compositions, reaction products of which demonstrate superior resistance to thermal degradation

A radical curable composition, radical cured reaction products of which demonstrate improved adhesion and resistance to thermal degradation at elevated temperatures, comprising:

• (a) a (meth)acrylate component;
• (b) a coreactant component selected from the group consisting of polymerizable materials within structure I represented as:
• ##STR14## wherein ##STR15## is a cyclic, bicyclic or tricyclic, carbocyclic or heterocyclic ring structure, which may be substituted or unsubstituted, having from five to eleven ring atoms, R may be chosen from H or alkyl, and n and m may be the same or different and are each integers from 0 to 6;
• structure II represented as:
• ##STR16## wherein ##STR17## is a cyclic, bicyclic or tricyclic, carbocyclic or heterocyclic ring structure, which may be substituted or unsubstituted, having from five to eleven ring atoms, R may be chosen from H or alkyl, and n and m may be the same or different and are each integers from 0 to 6;
• and structure III represented as:
• ##STR18## wherein R.sub.1 may be chosen from H or alkyl;
• R.sub.2 may be chosen from H or alkyl;
• or R.sub.1 and R.sub.2, taken together, may for, carbo- or hetero-cyclic, bicyclic or tricyclic ring structures having from five to eleven ring atoms;
• may be chosen from H or alkyl,
• R.sub.3 may be chosen from linear or branched alkylene groups, with or without interruption by a hereto atom;
• and
• R.sub.4 is H or alkyl;
• and
• (c) a radical cure-inducing composition, wherein the presence of the coreactant in the composition provides radical cured reaction products thereof with improved adhesion and resistance to thermal degradation.