| abstract |
PCT No. PCT/JP89/01076 Sec. 371 Date Jun. 20, 1990 Sec. 102(e) Date Jun. 20, 1990 PCT Filed Oct. 20, 1989 PCT Pub. No. WO90/04587 PCT Pub. Date May 3, 1990.4,4'-Bis(methacryloylthio)diphenylsulfide having the formula (I): <IMAGE> (I) and a curable composition characterized by comprising: (A) 4,4'-bis(methacryloylthio)diphenylsulfide having the above formula (I): (B) (i) another vinyl monomer copolymerizable with 4,4'-bis(methacryloylthio)diphenylsulfide having the above formula (I), and (ii) a polythiol represented by the formula (II): R-(SH)n (II) wherein R is a polyvalent organic group and n represents an integer of 2 or more, wherein the content of the component (B)(i), when the component (B)(i) is present, in the total amount of said components (A), (B)(i) and (B)(ii) is 10 to 90% by weight, and the functional group equivalent ratio of the mercapto groups of the component (B)(ii), when the component (B)(ii) is present, to the methacryloyl groups of the component (A) is from 0.02 to 1.01, and a curable composition characterized by comprising: a prepolymer having a polythioether skeleton obtained by the addition reaction of (A) 4,4'-bis(methacryloylthio)diphenylsulfide having the above formula (I): (B) (ii) a polythiol having the formula (II): R-(SH)n (II) wherein R is a polyvalent organic group composed of an aliphatic or aromatic hydrocarbon and n represents an integer of 2 or more, and (B) (i) another polymerizable monomer copolymerizable with 4,4'-bis(methacryloylthio)diphenylsulfide having the above formula (I). |