Process of curing unsaturated polyester resin

Claim 1

THE PROCESS OF MANUFACTURING ARTICLES FROM CURABLE OLEFINICALLY UNSATURATED POLYESTER RESINS WHICH COMPRISES THE STEPS OF, (A) MIXING SAID RESINS WITH (A) A MONOMERIC ORGANIC COMPOUND HAVING AN OLEFINIC DOUBLE BOND WHICH REACTS WITH THE OLEFINIC UNSATURATED BOND OF SAID POLYESTER RESIN IN COPOLYMERIZATION BY FREE RADICAL POLYMERIZATION CATALYST, AND A CATALYST SYSTEM CONSISTING ESSENTIALLY OF (B) A FREE RADICAL POLYMERIZATION CATALYST WHICH IS ACTIVE ONLY AT TEMPERATURES ABOVE 60*C., SAID FREE RADIAL POLYMERIZATION CATALYST BEING IN AN AMOUNT OF 0.01 TO 1 PART BY WEIGHT FOR EACH 100 PARTS OF THE MIXTURE OF SAID RESIN AND SAID MONOMERIC ORGANIC COMPOUND, AND (C) BOTH A TETRAORGANIC QUATERNARY AMMONIUM COMPOUND AND AN ORGANIC MERCAPTAN; (B) ALLOWING THE RESULTING RESINOUS MIXTURE TO REACT AT A TEMPERATURE BELOW ABOUT 60*C. TO FORM A DEFORMABLE GEL WHICH IS STABLE TO PROLONG STORAGE; AND (C) THEREAFTER SUBJECTING SAID GET TO TEMPERATURES ABOVE ABOUT 60*C. TO CURE SAID GET TO A HARD PRODUCT.