Disclosed is a novel curing system which is not associated with decomposition or production of low molecular materials. The curing system employs aqueous composition which comprises (a) a compound having in one molecule at least two carbonylcyclic urea groups represented by the following formula (1);
[wherein n is an integer of 0 to 5, X which may be the same or different represents oxygen atom, a sulfur atom or -NR₁- in which R₁ is a hydrogen atom, an alkyl, hydroxyalkyl or alkylene group having 1 to 5 carbon atoms.] and (b) a basic resin which has a functional group reactive with an isocyanate group and is water soluble or water dispersible by neutralizing.
The present invention also provides an aqueous composition comprising a basic resin (c) which has a functional group reactive with an isocyanate group and has in one molecule at least two carbonylcyclic urea groups represented by the following formula (1);
[wherein n and X are the same as mentioned above.] and which is water soluble or water dispersible by neutralizing.
本发明公开了一种新型固化体系,它与低分子材料的分解或产生无关。该固化体系采用的
水性组合物包括 (a) 在一个分子中至少有两个羰基环
脲基团的化合物,其代表式如下 (1);
[其中 n 是 0 至 5 的整数,X 可以相同或不同代表氧原子、
硫原子或-NR₁-,其中 R₁ 是氢原子、烷基、羟基烷基或具有 1 至 5 个碳原子的亚烷基。
本发明还提供了一种
水性组合物,该组合物包含碱性
树脂 (c),该
树脂具有与
异氰酸酯基反应的官能团,并在一个分子中具有至少两个由下式 (1) 表示的羰基环
脲基;
[其中 n 和 X 与上述相同],可溶于
水或通过中和分散于
水。