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Process for the preparation of cationic vinyl ester based polymer latices and their use as formaldehyde-free binders.
Process for the preparation of cationic vinyl ester based polymer latices and their use as formaldehyde-free binders.
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机译:阳离子乙烯基酯基聚合物胶乳的制备方法及其作为无甲醛粘合剂的用途。
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摘要
High solids, low viscosity, alkaline-curable, thermosetting cationic vinyl ester based polymer latices, characterized by the high molecular weight of the polymer therein, are prepared by polymerizing at least 5% of selected vinyl esters (up to C6), 0.5-10% of self-crosslinking cationic quaternary ammonium monomer, and optionally a vinyl polymerizable monomer such as butyl acrylate, ethylene, acrylamide, diallyl maleate, and/or 2-hydroxyethyl acrylate. The polymerization is carried out in the presence of water, a watersoluble cationic azo initiator, a water-soluble amino thiol salt chain transfer agent, and a cationic and/or nonionic surfactant. The latices are useful as formaldehyde-free binders for polyester nonwovens.
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