申请人:MITSUI TOATSU CHEMICALS, INCORPORATED
公开号:EP0713105A2
公开(公告)日:1996-05-22
A composition for optical materials which comprises;
(a) a component containing at least one polyisocyanate represented by the formula (1)
A(̵S-B-NCO)n (1)
wherein A is an alkanediyl group or an alkanetetrayl group which may contain a sulfur atom, or a dithianetetrayl group, and the alkanediyl group or the alkanetetrayl group may be substituted by a phenyl group; B is a methylene chain represented by
(m is an integer of 1 to 4) which may contain a sulfur atom, and B's may be the same or different; and n is an integer of 2 or 4, and
(b) a component containing at least one polythiol having two or more mercapto groups. The composition is useful to provide optical products such as plastic lenses, filters, substrates for recording media and optical fibers which have a very high refractive index and which are excellent in heat resistance.
一种光学材料组合物,包括
(a) 一种含有至少一种由式(1)表示的多异氰酸酯的成分
A(̵S-B-NCO)n (1)
其中 A 是一个烷二基或一个烷四基,该烷二基或烷四基可含有一个硫原子,或 一个二硫四基,该烷二基或烷四基可被一个苯基取代; B 是一个亚甲基链,其代表式为
(m 为 1 至 4 的整数),其中可含有一个硫原子,B 可以相同或不同;n 为 2 或 4 的整数,以及
(b) 含有至少一种具有两个或两个以上巯基的聚硫醇的成分。该组合物可用于提供具有极高折射率和优异耐热性的光学产品,如塑料透镜、滤光片、记录介质基板和光纤。