A crosslinkable polymeric emulsion has a pH from 1.5 to 8.5 and includes a carboxyl-substituted latex polymer dispersed in an aqueous medium, an Iron (III) compound and an amount of a stabilizer selected from the group consisting of nonionic surfactants and protective colloids effective to sterically stabilize the emulsion. A method for making a crosslinked polymer film includes forming a layer of the crosslinkable polymer emulsion and drying the layer to form the crosslinked polymer film, the film being ionically crosslinked between carboxyl substituent groups of the polymer by Iron (III) cations. A crosslinking agent for carboxyl-substituted polymers includes particles of a water-insoluble Iron (III) compound having an average maximum characteristic linear dimension of less than or equal to 5 microns.
可交联聚合物乳液的 pH 值为 1.5 至 8.5,包括分散在
水介质中的羧基取代的胶乳聚 合物、
铁(III)化合物和一定量的稳定剂,稳定剂选自由非离子表面活性剂和保护胶体组 成的组,能有效地立体稳定乳液。一种制造交联聚合物薄膜的方法包括形成一层可交联聚合物乳液并干燥该层以形成交联聚合物薄膜,该薄膜通过
铁(III)阳离子在聚合物的羧基取代基团之间离子交联。羧基取代聚合物的
交联剂包括平均最大特征线性尺寸小于或等于 5 微米的不溶于
水的
铁(III)化合物颗粒。