Provided is a novel polyisocyanate compound of the general formula (I) wherein n is an integer of 1 to 4, and each individual n represents the same value
and a process for the production thereof comprising the steps of
(1) preparing a tricarboxylic acid ester by reacting
a) 1,2,3-trimercaptopropane with a halogenoaliphatic carboxylic acid ester of the general formula X-(CH2)n-COOR1 (II), or
b) 1,2,3-trihalogenopropane with a mercaptoaliphatic carboxylic acid ester of the general formula HS-(CH2)n-COOR1 (V), or
c) 1,2,3-trimercaptopropane with an aliphatic unsaturated carboxylic acid lower alkyl ester of the formula CH2=CH-(CH2)k-COOR1 (VI),
(2) reacting the tricarboxylic acid ester with hydrazine to obtain a tricarbonyl hydrazide, and
(3) converting the carbonyl hydrazide groups into isocyanate groups by reacting the tricarbonyl hydrazide compound with nitrous acid.
Further provided is an optical resin material formed of a poly(thio)urethane which is obtainable by polymerizing a monomer mixture comprising (A) a component containing at least one polyisocyanate compound of the general formula (I) and (B) a component containing at least one poly(thi)ol compound having two or more mercapto and/or hydroxy groups or both in the molecule.
本发明提供了一种通式(I)的新型多
异氰酸酯化合物,其中 n 为 1 至 4 的整数,每个 n 代表相同的值
及其生产工艺,包括以下步骤
(1) 通过以下反应制备
三羧酸酯
a) 1,2,3-三巯
丙烷与通式为 X-(
CH2)n-COOR1 (II) 的卤代
脂肪族羧酸酯反应,或
b) 1,2,3-三
卤丙烷与通式为 HS-( )n-COOR1 (V) 的巯基
脂肪族羧酸酯,或
c) 1,2,3-三巯
丙烷与通式为 =CH-( )k-COOR1 (VI) 的脂肪族不饱和
羧酸低级烷基酯、
(2) 使
三羧酸酯与
肼反应,得到三羰基
肼,和
(3) 将三羰基酰
肼化合物与
亚硝酸反应,将羰基酰
肼基团转化为
异氰酸酯基团。
进一步提供了一种由聚(
硫)
氨基甲酸酯形成的光学
树脂材料,该材料可通过聚合单体混合物获得,该单体混合物包含(A)含有至少一种通式(I)的多
异氰酸酯化合物的组分和(B)含有至少一种分子中含有两个或两个以上巯基和/或羟基或两者兼有的聚(
硫)醇化合物的组分。