AN ABRASION RESISTANT MULTI-LAYERED COMPOSITE

WIPO Patent Application WO/2021/134193

A1

The invention relates to a multi-layered composite comprising a substrate, an adhesive layer and a top coat layer, said top coat layer being formed by a silicone coating composition comprising following components: (A) at least one organopolysiloxane polymer having at least two alkene functions; (B) at least one cross-linking organohydrogensiloxane having at least two Si-H groups;and (C) a catalyst capable of promoting the reaction between component (A) and component (B); characterized in that the component (B) contains at least 25%, preferably at least 30%, more preferably at least 45%by weight of component (B) of a three-dimensional net-like organohydrogensiloxane resin (B' ) containing at least two different units selected from the group comprising or consisting of - units M of formula R' 3SiO 1/2, - units D of formula R' 2SiO 2/2, - units T of formula R'SiO 3/2 and - units Q of formula SiO 4/2, wherein R' represents hydrogen atom or a monovalent hydrocarbonyl group having from 1 to 20 carbon atoms, and with the proviso that at least one of these units is the unit T or Q, preferably Q, and at least one of the units M, D and T comprises a hydrogen atom. The inventive multi-layered composite with a surface has excellent abrasive resistance and good mechanical properties.

ZHOU WENJUAN (CN)
ZHU YONGJI (CN)
SUN ZHIGUANG (CN)

PCT/CN2019/129879

July 08, 2021

December 30, 2019

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ELKEM SILICONES SHANGHAI CO LTD (CN)

C08L83/00; B32B27/00; C08G77/00; C08G77/08; C08G77/20; C09D183/04

WO2012058657A2

2012-05-03

CN107001634A	2017-08-01
CN107001634A	2017-08-01
CN102414254A	2012-04-11
CN105802238A	2016-07-27
CN108431155A	2018-08-21

CCPIT PATENT AND TRADEMARK LAW OFFICE (CN)

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