MICROENCAPSULATED CURING AGENT, ITS PRODUCTION, UNSATURATED POLYESTER RESIN COMPOSITION CONTAINING THE SAME CURING AGENT AND METHOD FOR CURING AND STABILIZING THE SAME

摘要

PURPOSE: To obtain the subject curing agent, composed of a core substance of an organic peroxide for an unsaturated polyester resin and a film substance, soluble at a curing temperature and having the inside of a polyelectrolyte and the outside of a specific polymer, excellent in storage stability and pot life and providing sharp curing. ;CONSTITUTION: The objective microencapsulated curing agent is obtained by adding an organic peroxide which is a solid at ordinary temperature and has at least 5C difference between the melting point and the thermal decomposition temperature for forming a core to an aqueous solution of a substance for forming an inner film containing a polyelectrolyte, producing a liquid mixture at a temperature below the thermal decomposition temperature, then cooling the liquid mixture, forming grains composed of the organic peroxide core and the inner film, subsequently adding a monomer composed of at least one of an acrylic acid ester, a methacrylic acid ester and a vinyl aromatic compound for forming an outer resin film and forming a resin film of the polymerized monomer on the inner film. The above-mentioned curing agent is soluble at the curing temperature of the unsaturated polyester resin and contains the core substance which is the organic peroxide for curing the unsaturated polyester resin in the interior.;COPYRIGHT: (C)1993,JPO&Japio