The present invention provides a curable composition having a proper viscosity and excellent handling properties, and a cured product that is obtainable by curing the curable composition and has excellent transparency, heat resistance and resistance to environment and a low Abbe's number, and further can effectively decrease chromatic aberration by the combined use with a material having a high Abbe's number.
The curable composition is characterized by comprising (a) silica fine particles, (b) a (meth)acrylate compound having at least two ethylenic unsaturated groups and having no ring structure, (c) a (meth)acrylate compound having at least two ethylenic unsaturated groups and having an aromatic ring structure and (d) a polymerization initiator, wherein the silica particles (a) are surface treated by a specific silane compound (e) and a specific silane compound (f).
Provided is a curable composition with one or more properties improved as compared with conventional curable compositions, the improved properties being selected from transparency and heat resistance of a cured product formed from the compostion and storage stability, handling property and moldability of the composition. The curable composition includes (A) silica fine particles surface-modified with at least one silane compound including at least (A1) a polymerizable silane compound of the general formula (1), (B) a (meth)acrylate compound, and (C) a polymerization initiator,
SiR1aR2bRc(OR)4-a-b-c (1)
wherein R1 is a C11-20 hydrocarbon group having an ethylenic unsaturated group, or a substituted C11-20 hydrocarbon group having an ethylenic unsaturated group and having an ether bond and/or an ester bond; R2 is a hydrogen atom or a C1-4 hydrocarbon group; R3 is a halogen atom; R4 is a hydrogen atom or a C1-10 hydrocarbon group; a is an integer of 1 to 3; b is an integer of 0 to 2; c is an integer of 0 to 3; the sum of a and b is 1 to 3; the sum of a, b and c is 1 to 4.
本发明提供了一种可固化组合物,与传统的可固化组合物相比,该组合物的一种或多种特性得到了改善,改善的特性选自该组合物形成的固化产品的透明度和耐热性,以及该组合物的储存稳定性、处理特性和成型性。可固化组合物包括:(A)用至少一种硅烷化合物进行表面改性的二氧化硅微粒,该硅烷化合物至少包括(A1)通式(1)的可聚合硅烷化合物,(B)(甲基)丙烯酸酯化合物和(C)聚合引发剂、
SiR1aR2bRc(OR)4-a-b-c (1)
其中 R1 是具有乙烯基不饱和基团的 C11-20 烃基,或具有乙烯基不饱和基团并具有醚键和/或酯键的取代 C11-20 烃基;R2 是氢原子或 C1-4 烃基;R3 是卤素原子; R4 是氢原子或 C1-10 烃基; a 是 1 至 3 的整数; b 是 0 至 2 的整数; c 是 0 至 3 的整数; a 和 b 之和是 1 至 3; a、b 和 c 之和是 1 至 4。
Type II photoinitiator system and method for crosslinking silicone compositions
申请人:ELKEM SILICONES FRANCE SAS
公开号:US10954384B2
公开(公告)日:2021-03-23
The present invention relates to a silicone composition C that is crosslinkable by exposure to radiation with a wavelength between 200 nm and 450 nm, comprising:
at least one radical photoinitiator A; and
at least one co-initiator B chosen from compounds comprising at least one hydrogen atom bonded to a silicon atom.