Patent ID: 6100362
Filing Date: 2000-08-08
Classification: C07C,C08G,G02B

Abstract:
A sulfur-containing urethane-based resin composition comprising a polythiol having four or more functional groups and at least one isocyanate selected from the group consisting of polyisocyanate compounds, polyisothiocyanate compounds and isocyanato group-containing polyisothiocyanate compounds, said polythiol being represented by any of the following formula (1): wherein R1, R2, R3 and R4 are each selected from the group consisting of H, --CH.sub.2 SH, --CH.sub.2 SCH.sub.2 CH.sub.2 SH, ##STR65## provided that where any one of R1, R2, R3 and R4 is H, at least one of the other three radicals represents ##STR66## where any two of R1, R2, R3 and R4 are H, two others are independently selected from ##STR67## and any three or all of R1, R2, R3 and R4 are not H simultaneously; formula (2):(HSCH.sub.2).sub.4-m C(CH.sub.2 SCH.sub.2 CH.sub.2 SH).sub.m( 2)wherein m denotes an integer of 1 to 3; and formula (3): ##STR68## wherein n denotes an integer of 0 to 3.