There is disclosed a primer composition comprising A] a reaction product of:
(1) a hydroxyl group-containing organic compound composed of;
(a) an epoxy group-containing alcohol represented by the general formula [I]:
wherein, R1 is a hydrocarbon group having 1 to 15 carbon atoms, or an organic group in which the same or different hydrocarbon groups are bonded to each other by an ether bond or an ester bond; and each of mand n is a value of 1 or more; and
(b) a hydroxyl group-containing (meth)acrylate represented by the formula [II]:
wherein R2 is a hydrogen atom or a methyl group; R3 is a substituted or unsubstituted hydrocarbon group, or a group in which the same or different hydrocarbon groups are bonded to each other by ether bond or the ester bond, the R3 being a-valent and having at least one hydroxyl group; and a is an integer of 1 to 3; an amount of active hydrogen atoms included in the aforesaid (a) being 25 to 75% with respect to the total amount of active hydrogen atoms included in the aforesaid (1), and
(2) a polyisocyanate including 70 to 100% of the theoretical amount of isocyanato groups which will react with the total amount of the active hydrogen atoms included in the aforesaid (1);
[B] an amino group-containing alkoxysilane or its partially hydrolyzed condensate having 0.5 to 1.5 amino active hydrogen atoms per epoxy group included in the aforesaid (1)(a); and
[C] a diluent.
本发明公开了一种底漆组合物,其中包含 A] 下列物质的反应产物
(1) 含羟基的有机化合物,由以下物质组成
(a) 由通式[I]代表的含环氧基的醇:
其中,R1 是具有 1 至 15 个碳原子的烃基,或相同或不同的烃基通过醚键或酯键相互键合 的有机基团;且每个 mand n 的值为 1 或以上;及
(b) 由式[II]代表的含羟基的(甲基)
丙烯酸酯:
其中 R2 是氢原子或甲基;R3 是取代或未取代的烃基,或相同或不同的烃基通过醚键或酯键相互结合的基团,R3 是一价的且至少有一个羟基;a 是 1 至 3 的整数;前述(a)中包含的活性氢原子的量占前述(1)中包含的活性氢原子总量的 25% 至 75%,以及
(2) 多
异氰酸酯,包括与上述(1)中所含活性氢原子总量发生反应的
异氰酸酯基团理论量的 70 至 100%;
[B] 含
氨基的烷氧基
硅烷或其部分
水解缩合物,其对上述(1)(a)中每个环氧基团具有 0.5 至 1.5 个
氨基活性氢原子;以及
[C] 稀释剂。