Allyl functional urethane oligomers and related compositions for coatings and adhesives
申请人:Arkema France
公开号:US11261288B2
公开(公告)日:2022-03-01
A urethane oligomer according to a) or b) has: a) at least two backbone residues R issued from a polyisocyanate without the NCO groups, linked between them with a diol residue RB (diol without the two OH groups) by two urethane bonds and each backbone residues R carrying (or linked to) at least two urethane segments each containing at least one terminal allyl group, b) at least one backbone residue R issued from a polyisocyanate without the NCO groups, the backbone residue R carrying (or linked to) at least two urethane segments each linked to R by one urethane bond with at least one urethane segment (arm) containing at least one terminal allyl group, and at least one urethane segment (arm) containing at least one terminal (meth)acrylate group. A curable composition containing the urethane oligomer reduces oxygen inhibition in coatings, adhesives, sealants or in resin matrix with good surface properties.
根据 a)或 b)所述的聚氨酯低聚物具有以下特征a) 至少两个由不含 NCO 基团的多异氰酸酯制成的骨架残基 R,它们之间通过两个氨基甲酸乙酯键与二元醇残基 RB(不含两个羟基的二元醇)相连,每个骨架残基 R 至少含有两个氨基甲酸乙酯段,每个氨基甲酸乙酯段含有至少一个末端烯丙基、b) 由不含 NCO 基团的多异氰酸酯产生的至少一个骨架残基 R,该骨架残基 R 带有(或连接有)至少两个氨基甲酸酯段,每个氨基甲酸酯段通过一个氨基甲酸酯键与 R 连接,其中至少一个氨基甲酸酯段(臂)含有至少一个末端烯丙基基团,至少一个氨基甲酸酯段(臂)含有至少一个末端(甲基)丙烯酸酯基团。含有聚氨酯低聚物的固化组合物可以减少涂料、粘合剂、密封剂或具有良好表面特性的树脂基体中的氧抑制。