Disclosed is a copolymer which includes at least monomer units corresponding to a vinyl monomer A containing a blocked isocyanate group and represented by following Formula (1); and monomer units corresponding to a vinyl monomer B containing a cyclic ether group having 3 to 5 members. The copolymer may further include monomer units corresponding to (meth)acrylic alkyl esters, aromatic vinyl compounds, hydroxyl-containing monomers, and/or carboxyl-containing monomers. In the formula, R1 represents hydrogen atom or methyl group; R2 represents a bivalent saturated aliphatic hydrocarbon group having 1 to 8 carbon atoms; and R3 represents a residue of isocyanate-blocking agent R3H. This copolymer gives a cured article that excels not only in adhesion to substrates but also in resistance to chemicals, especially to alkalis.
本发明公开了一种共聚物,该共聚物至少包括与含有嵌段
异氰酸酯基团的
乙烯基单体 A 相对应的单体单元,并由下式(1)表示;以及与含有 3 至 5 个
环醚基团的
乙烯基单体 B 相对应的单体单元。共聚物可进一步包括与(甲基)
丙烯酸烷基酯、芳香族
乙烯基化合物、含羟基单体和/或含羧基单体相对应的单体单元。式中,R1 代表氢原子或甲基;R2 代表具有 1 至 8 个碳原子的二价饱和脂肪族烃基;R3 代表
异氰酸酯封端剂 R3H 的残基。这种共聚物制成的固化物不仅在与基材的粘附性方面表现出色,而且在耐
化学性,特别是耐碱性方面也很出色。