Patent ID: 8383706

Claim:
A B-stagable adhesive composition comprising: a) 30 to 90 mole % of one or more N-aryl benzoxazines; b) 10 to 70 mole % of one or more N-alkyl benzoxazines; c) a stoichiometric equivalent of one or more thiol compounds ±15%, relative to the benzoxazines, wherein the thiol compound is of the formula R 4 —(S—H) n , wherein R 4 is a non-polymeric aliphatic, cycloaliphatic, aromatic or alkyl-substituted aromatic moiety having from 1 to 30 carbon atoms and optionally 1 to four catenary heteroatoms of oxygen, nitrogen or sulfur; wherein the thiol compounds will react with the N-alkyl benzoxazine to form a partially cured mixture at a first temperature then the N-aryl benzoxazine will react with the remaining thiol compounds to produce a fully cured adhesive at a second higher temperature; and which when cured has an overlap shear strength of at least 0.5 MPa.