| 摘要 |
<p>A polymerizable composition containing (A) a compound having two or more mercapto groups; (B) a NCO-terminated polyurethane prepolymer; (C) a polyisocyanate compound; and (D) an episulfide compound. The episulfide compound D has in its molecule at least one structural group represented by the following formula 1:
wherein R 1 is a divalent hydrocarbon group having from 1 to 10 carbon atoms or a single bond, R 2 , R 3 and R 4 are each independently a hydrocarbon group having from 1 to 10 carbon atoms or hydrogen, Y is O or S, m is an integer of from 1 to 5, and n is an integer of from 0 to 5. Optical materials produced by curing the polymerizable composition by polymerization have a high refractive index and a high Abbe's number and are excellent in impact strength.</p> |
| 申请人 |
MITSUBISHI GAS CHEMICAL COMPANY, INC. |
发明人 |
ISAHAYA, YOSHINORI,;KOSHIISHI, EIJI,;TANAKA, HIROAKI;YOSHIDA, SHU,;TAGAI, SHIROU,;OHGI, HIROAKI;FUJIWARA, MASAHIRO,;KANASAKI, SHINGO, |
