HYDROLYSIS STABILIZER FOR UNSATURATED POLYESTER RESIN AND METHOD FOR STABILIZING THE UNSATURATED POLYESTER RESIN AGAINST HYDROLYSIS BY THE HYDROLYSIS STABILIZER

摘要

PROBLEM TO BE SOLVED: To obtain the subject stabilizer capable of imparting high hydrolysis resistance to unsaturated polyester resins by bringing a specific carbodiimide compound as a main component. ;SOLUTION: This hydrolysis stabilizer for unsaturated polyester resins comprises a carbodiimide compound of the formula R₁-NCN-R₂ (R₁ and R₂ are each a lower alkyl, cyclohexyl, phenyl or 2,6-diisopropylphenyl) as a main ingredient. The compound can be obtained, e.g. by bringing cyclohexyl isocyanate to a carbodiimide forming reaction by using a carbodiimide forming catalyst such as 3-methyl-1-phenyl-2-phospholene-1-oxide and a compound of the formula [R₃ and R₄ are each a 4,4'-dicyclohexylmethane diisocyanate, etc.: (n) is 1-50], etc., are preferable ad main ingradients.;COPYRIGHT: (C)1997,JPO