Coating composition and process for preparing synthetic resin shaped articles by using same
申请人:MITSUBISHI RAYON CO., LTD.
公开号:EP0035272A1
公开(公告)日:1981-09-09
A coating composition for the preparation of synthetic resin shaped articles excellent in abrasion resistance and weatherability is described. This composition comprises
(a) a polyfunctional monomer composition comprising (i) 40-100 wt.% of a polyfunctional monomer containing at least three methacryloyloxy or acryloyloxy groups in the molecule and having a MW of not higher than about 900 and (ii) 0-60 wt.% of a mono- or bi-functional monomer having one or two methacryloyloxy or acryloyloxy groups in the molecule and having a MW of not higher than about 300 per methacryloyloxy or acryloyloxy group,
(b) 5-35 parts by wt., based on 100 wt. parts of the monomer composition, of at least one ultraviolet absorber,
(c) 0.5-8 wt. parts, based on 100 parts by wt. of the monomer composition, of at least one polymeric material selected from polymers of alkyl methacrylates and alkyl acrylates, and
(d) 0.01-6 parts by wt., based on 100 parts by wt. of the monomer composition, of a photosensitizer. The coating composition is coated on a synthetic resin shaped article and then, irradiated with ultraviolet rays in an inert gas or air to form a cross-linked coating film having a thickness of 1 to 30 microns.
本文介绍了一种用于制备具有优异耐磨性和耐候性的合成树脂成型品的涂层组合物。这种组合物包括
(a) 多官能团单体组合物,包括:(i) 40-100 重量份的多官能团单体,其分子中至少含有三个甲基丙烯酰氧基或丙烯酰氧基基团,且分子量不高于约 900;(ii) 0-60 重量份的单官能团或双官能团单体,其分子中含有一个或两个甲基丙烯酰氧基或丙烯酰氧基基团,且每个甲基丙烯酰氧基或丙烯酰氧基基团的分子量不高于约 300、
(b) 以 100 重量份的单体组合物计,5-35 重量份的至少一种紫外线吸收剂、
(c) 以 100 重量份的单体组合物为基准,0.5-8 重量份的至少一种选自烷基 甲基丙烯酸酯和烷基丙烯酸酯聚合物的聚合材料,以及
(d) 以 100 份单体组合物重量计,0.01-6 份光敏剂。将涂层组合物涂在合成树脂成型品上,然后在惰性气体或空气中用紫外线照射,形成厚度为 1 至 30 微米的交联涂膜。