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US 12,215,184 B2Granted
Polyol or polythiol compound, preparation method therefor, transparent polyurethane-based resin prepared therefrom, and optical body
OwnerKeun Sik Kiminventor
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Abstract
The present invention relates to a novel polyol or polythiol having three or more functional groups, a preparation method there for, and an optical body manufactured therefrom. Especially, the present invention relates to a poly(thio)urethane-based resin and an optical body, such as lenses, manufactured using the resin, wherein the poly(thio)urethane-based resin is prepared by obtaining a novel polyol and then combining a polythiol, which is prepared from the obtained polyol, with a polyiso(thio)cyanate.
Claims6
A polythiol compound or an isomer thereof represented by Formula (b):
- (wherein, Y is a sulfur atom;
- Ra is methyl or ethyl;
- and
- Rb is —CH(CH2SH)CH2SCH2CH(CH2SH)SCH(CH3)CH2SH).
1 more element
Dependencies are inferred from the claim text.