The invention provides novel siloxane monomers useful in a variety of adhesive applications. In one aspect, the siloxane compounds described herein can be used as Diels-Alder type curatives for bismaleimide or poly-maleimide monomers. The unsaturated resins shown here are attractive for use as maleimide curatives due to their poly-functionality. Each substituted styrenyl residue can react with two maleimide functional groups. Thus, an invention adhesive composition typically contains an excess of bismaleimide monomers.