An ultraviolet curable blend composition comprising (exclusive of any solvent present): (a) about 35% to about 65% by weight of a first acrylated aliphatic urethane having a molecular weight of between about 500 and 2000 and formed by the reaction of (i) a first multifunctional acrylate with a molecular weight of between about 190 and 500 and containing at least three polymerizable unsaturated groups per molecule, with (ii) an aliphatic urethane based on a polymer of alkyl carbomonocycle diisocyanate with alkanepolyol polyacrylates; (b) about 5% to about 25% by weight of a second acrylated aliphatic urethane having a molecular weight of about 1200 to about 2600 and formed by the reaction of a second multifunctional acrylate with a molecular weight of about 110 to about 500 with an aliphatic urethane based on a polyether and having a molecular weight of about 800 to about 2200; (c) about 10% to about 55% by weight of a third multifunctional acrylate having a molecular weight of between about 170 and about 1000 and containing at least two polymerizable unsaturated groups per molecule; and (d) a photopolymerization initiator and/or sensitizer. Also described are preferred processes and coated articles involving preferred compositions.
一种可紫外线固化的混合物组合物,包括(不包括任何存在的溶剂)(a) 约 35%至约 65%(按重量计)的第一
丙烯酸脂族聚
氨酯,其分子量在约 500 至 2000 之间,由以下物质反应形成:(i) 第一多功能
丙烯酸酯,其分子量在约 190 至 500 之间,每个分子至少含有三个可聚合的不饱和基团;(ii) 基于烷基碳单环二
异氰酸酯与烷基多元醇聚
丙烯酸酯聚合物的脂族聚
氨酯;(b) 约 5%至约 25%(按重量计)的第二种
丙烯酸脂族聚
氨酯,其分子量约为 1200 至约 2600,由分子量约为 110 至约 500 的第二种多功能
丙烯酸酯与基于聚醚且分子量约为 800 至约 2200 的脂族聚
氨酯反应形成;(c) 第三种多功能
丙烯酸酯约 10%至约 55%(按重量计),其分子量在约 170 至约 1000 之间,每个分子至少含有两个可聚合的不饱和基团;以及 (d) 光聚合
引发剂和/或敏化剂。此外,还介绍了涉及优选组合物的优选工艺和涂覆制品。