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    • 5. 发明公开
    • Cationic ultraviolet cure of hydroxyl-terminated polymers
    • 羟基封端聚合物的阳离子超紫外线固化
    • EP0162304A3
    • 1986-10-08
    • EP85104818
    • 1985-04-20
    • DeSOTO, INC.
    • Bishop, Timothy E.Pasternack, GeorgeZimmerman, John M.
    • C08F02/38C09D03/74C08L63/00
    • C08G59/68C07F1/005C08F2/38C09D163/00C08L2666/04
    • Liquid coating compositions are described which cure on exposure to ultraviolet light by a cationic mechanism and which comprise: (1) a cationically curable polyepoxide; (2) a polyalcohol component comprising an addition polymer or copolymer having a weight average molecular weight of from about 1,500 to about 15,000 of polymerized monoethylenically unsaturated monomers which may include up to 15% by weight of an hydroxy-functional monomer, and which carries an hydroxyl group at most of its ends to provide an average of from about 1.6 to 5 hydroxyl groups per polymer molecule; and (3) a catalyst which promotes the desired cationic cure on ultraviolet radiation. The hydroxyl-terminated polymer is preferably liquid to slowly flowable at room temperature in the absence of solvent, and it enables coatings which are sufficiently liquid for coating application with little if any, solvent, and it provides a new balance of coating hardness and modulus.
    • 描述了通过阳离子机理暴露于紫外线而固化的液体涂料组合物,其包含:(1)阳离子可固化的聚环氧化物; (2)多元醇组分,其包含加成聚合物或共聚物,其重均分子量为约1,500至约15,000的聚合单烯属不饱和单体,其可包含至多15重量%的羟基官能单体,并且其携带 羟基在其末端的大多数端,以提供平均每个聚合物分子约1.6至5个羟基; 和(3)在紫外线辐射下促进期望的阳离子固化的催化剂。 羟基封端的聚合物优选在室温下在不存在溶剂的情况下是液体的以缓慢流动,并且使得能够使用足够液体的涂层用于少量溶剂涂覆,并且其提供涂层硬度和模量的新平衡。