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    • 34. 发明授权
    • Process of making epoxy resins modified with mercaptocarboxylates
    • 制备用巯基羧酸改性的环氧树脂的方法
    • US4153586A
    • 1979-05-08
    • US885935
    • 1978-03-13
    • Thomas R. HockswenderMarvis E. Hartman
    • Thomas R. HockswenderMarvis E. Hartman
    • C08G59/66C09D5/44C08L91/00
    • C08G59/66C09D5/4446
    • A process of making modified epoxy resins wherein a polyepoxide resin is reacted with a mercaptan compound of the formula HS--R--(COOX).sub.m wherein R is an organic radical having from 1 to 10 carbon atoms, X is hydrogen or a moiety formed by reacting the carboxyl group with a basic compound to form its salt and m is an integer of from 1 to 5. The compounds are reacted in the presence of a tin catalyst to produce resins of the structureB [--S--R--(COOX).sub.m ].sub.nwherein B is the residue from the ring opening reaction of an epoxide group on the polyepoxide resin molecule and the sulfhydryl hydrogen, R, X and m are as defined previously and n is at least 1. The aforementioned resins are produced without the need of a hydrolysis step.The modified epoxy resins are useful in formulating coating compositions having excellent physical and chemical properties. The resins can be dissolved or dispersed in water to form aqueous coating compositions.
    • 一种制备改性环氧树脂的方法,其中聚环氧化物树脂与式HS-R-(COOX)m的硫醇化合物反应,其中R是具有1至10个碳原子的有机基团,X是氢或由 使羧基与碱性化合物反应形成其盐,m为1至5的整数。化合物在锡催化剂存在下反应生成结构B [-SR-(COOX)m]的树脂, 其中B是来自多环氧树脂分子和巯基氢环上的环氧基的开环反应的残基,R,X和m如前定义,n至少为1.上述树脂是在不需要 水解步骤。