| abstract |
Cross-linked polymers are obtained by transesterifying an alkyl monofunctional acetoacetate with a polyhydroxy functional monomer or polymer so as to produce a polyacetoacetic functional monomer or polymer and reacting said polyacetoacetic functional monomer or polymer with a poly a, B-unsaturated ester in the presence of a strong base catalyst or in the presence of a organometallic catalyst. The poly a, B-unsaturated ester is formed by reacting crotonic, acrylic, methacrylic, maleic, cinnamic or itaconic acids with polyhydroxy or epoxy functional monomers and polymers. |