The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 14, 1993
Filed:
Sep. 28, 1992
Satoshi Maruyama, Kawasaki, JP;
Naoki Minorikawa, Kawasaki, JP;
Tsutomu Arakawa, Kawasaki, JP;
Haruo Yoshida, Oita, JP;
Hirotaka Tagoshi, Oita, JP;
Kazuto Abe, Oita, JP;
Sumitomo Seika Chemicals Co., Ltd., Hyogo, JP;
Abstract
A method of producing a curable composition containing a prepolymer having a polythioether skeleton, characterized by comprising addition reacting (A) 4,4'-bis(methacryloylthio)-diphenylsulfide having the formula (I): ##STR1## wherein R is a polyvalent organic group composed of an aliphatic or aromatic hydrocarbon and n represents an integer of 2 or more, with the functional group equivalent ratio of the mercapto groups of the component (B) (ii) to the methacryloyl groups of the component (A) being from 0.02 to 1.01, in another vinyl monomer copolymerizable with 4,4'-bis(methacryloylthio)diphenylsulfide having the above formula (I) in the presence of a base catalyst.