Ultraviolet-curing coating composition and production process of molded plastic article having hardened coating of modified surface characteristics
申请人:MITSUBISHI RAYON CO., LTD.
公开号:EP0331087A2
公开(公告)日:1989-09-06
An ultraviolet-curing coating composition is formed of (A) 100 parts by weight of a photopolymerizable composition composed of (a-1) 50-100 wt.% of a crosslinking-polymerizable compound containing at least two acryloyloxy or methacryloyloxy groups per molecule and (a-2) 0-50 wt.% of another compound copolymerizable with the crosslinking-polymerizable compound (a-1); (B) 0.02-10 parts by weight of a photoinitiator comprising a photoinitiator compound (b-1), the peak of sensitive wavelengths of said photoinitiator compound (b-1) being between 365-400 nm; and (C) 0.1-15 parts by weight of an ultraviolet absorber. A molded plastic article having a hardened coating of modified surface characteristics can be produced by i) sandwiching the above composition between the article and a synthetic resin film, ii) bringing the composition into close contact with the article, iii) exposing the composition to ultraviolet rays to cure the composition, thereby forming the coating on the article, and then iv) peeling off the film from the coating.
(B) 0.02-10 重量份的光引发剂,包括光引发剂化合物 (b-1),所述光引发剂化合物 (b-1) 的敏感波长峰值在 365-400 纳米之间;以及 (C) 0.1-15 重量份的紫外线吸收剂。可通过以下方法生产出具有改良表面特性的硬化涂层的模塑制品:i) 将上述组合物夹在制品和合成树脂薄膜之间;ii) 使组合物与制品紧密接触;iii) 将组合物暴露在紫外线下以固化组合物,从而在制品上形成涂层;然后 iv) 从涂层上剥离薄膜。