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发明授权
US4912147A Preparation of aqueous (meth)acrylate copolymer dispersions in two stages and their use as impregnating materials, coating materials and binders for sheet-like fibrous structures 失效
两步制备（甲基）丙烯酸（甲基）丙烯酸酯共聚物分散体，它们用作片状纤维结构物的浸渍材料，涂料和粘合剂

Preparation of aqueous (meth)acrylate copolymer dispersions in two stages and their use as impregnating materials, coating materials and binders for sheet-like fibrous structures
摘要：
Aqueous (meth)acrylate copolymer dispersions can be prepared by polymerization of the monomers in two stages having different monomer compositions and with the concomitant use of crosslinking monomers in aqueous emulsion at the usual temperatures in the presence of the conventional emulsifiers and polymerization initiators, from 40 to 99.5% by weight of the total monomers being polymerized in the first stage and from 60 to 0.5% by weight of the total monomers being polymerized in the second stage, by a process in which from 0.5 to 10% by weight, based on the total monomers, of (meth)-acrylamidoglycollic acid and /or its methyl ester and/or its methyl ether are polymerized in the second stage and from 0 to 1.8% by weight, based on the total monomers, of the amidoglycollic acid compounds are polymerized in the first stage, and the resulting copolymer dispersions are used as binders for sheet-like textile fibrous structures.
摘要（中）：

水性（甲基）丙烯酸酯共聚物分散体可以通过在具有不同单体组成的两个阶段中聚合单体并在常规温度下在常规乳化剂和聚合引发剂存在下伴随使用交联单体在水性乳液中制备，从40 至99.5重量％的第一阶段中聚合的单体的总重量和在第二阶段中聚合的总单体的60至0.5重量％的方法，其中以0.5至10重量％ （甲基）丙烯酰胺聚糖和/或其甲基酯和/或其甲基醚的总单体在第二阶段中聚合，并且基于总单体为0至1.8重量％的酰胺聚糖酸化合物聚合 在第一阶段中，将所得的共聚物分散体用作片状纺织纤维结构体的粘合剂。

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