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    • 5. 发明授权
    • Water-dilutable film-forming binders
    • 水可稀释的成膜粘合剂
    • US06228931B1
    • 2001-05-08
    • US09264883
    • 1999-03-09
    • Werner WilfingerIngo KreissmannKurt GossakJohann Luttenberger
    • Werner WilfingerIngo KreissmannKurt GossakJohann Luttenberger
    • C08J305
    • C08G81/021C09D5/027
    • A low-solvent aqueous binder includes: a water-insoluble synthetic resin component A; and an emulsifier resin B in a mass ratio of A to B of from 70:30 to 30:70. The emulsifier resin B is a reaction product of a water-insoluble synthetic resin B1 that includes hydroxyl groups as functional groups, a synthetic resin B2 that includes carboxyl groups as functional groups, and a neutralizing agent for the carboxyl groups of B. The amount of the neutralizing agent is such that the neutralizing agent is able to neutralize from 5 to 200% of the carboxyl groups of B. A process for preparing a low-solvent aqueous binder includes: mixing the water-insoluble synthetic resin component B1 comprising hydroxyl functional groups and the synthetic resin B2 in bulk or dissolved in an organic solvent to form a mixture; removing the solvent by applying subatmospheric pressure and heating until the content of the mixture is at least 85% by mass; maintaining the mixture at a temperature from 90° to 150° C. until the reaction product of the mixture is homogeneously emulsifiable in a mass ratio of 3 parts of resin to 7 parts of water; neutralizing the reaction product by adding a neutralizing agent in an amount sufficient to neutralize from 5 to 200% of carboxyl groups that have remained following the reaction; adding the water-insoluble synthetic resin A in a mass ratio of A to B of from 70:30 to 30:70, and emulsifying the mixture in water.
    • 低溶剂水性粘合剂包括:不溶于水的合成树脂组分A; 和A〜B的质量比为70:30〜30:70的乳化树脂B. 乳化树脂B是包含羟基作为官能团的水不溶性合成树脂B1,包含羧基作为官能团的合成树脂B2和B的羧基中和剂的反应产物。 中和剂使得中和剂能够中和B的羧基的5〜200%。制备低溶剂水性粘合剂的方法包括:将包含羟基官能团的水不溶性合成树脂组分B1 和合成树脂B2本体或溶解在有机溶剂中以形成混合物; 通过施加低于大气压并加热直到混合物的含量为至少85质量%除去溶剂; 将混合物保持在90℃至150℃的温度下,直到混合物的反应产物以3份树脂与7份水的质量比均匀乳化; 通过加入足以中和反应后残留的羧基的5〜200%的中和剂中和反应产物; 将A〜B的质量比为70:30〜30:70的水不溶性合成树脂A加入水中,使其混合。