Cable, in particular for transport or distribution of electrical energy and insulating composition
申请人:——
公开号:US20020164480A1
公开(公告)日:2002-11-07
Electrical cable having at least one conducting element, at least one polyolefin-based insulating covering layer, in which said insulating covering layer has at least one voltage stabilizer, said voltage stabilizer being a benzophenone substituted with at least one group selected from alkyl, arylalkyl and alkylaryl wherein said group: a) is linked to a phenyl ring of the benzophenone directly or via an oxygen bridge (—O—); b) contains, optionally, one or more oxygen bridges (—O—); and c) is optionally linked to a phenyl ring of at least one or other benzophenone group, provided that when said at least one group is an alkyl, optionally substituted, the carbon atom of said alkyl which is directly linked to a phenyl ring of said benzophenone is tertiary. A polyolefin-based insulating composition having at least one voltage stabilizer as described above.
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.