Cationic vinyl ester based polymer latices, their...

Details Cationic vinyl ester based polymer latices, their... Cationic vinyl ester based polymer latices, their...

C - Chemistry, Metallurgy

08

F

117/43, 400/9051

C08F 218/04 (2006.01) D04H 1/64 (2006.01)

Patent

CA 1242294

CATIONIC VINYL ESTER BASED POLYMER LATICES, THEIR PREPARATION AND USE AS FORMALDEHYDE-FREE BINDERS Abstract of the Disclosure High solids, low viscosity, alkaline-curable, thermosetting cat- ionic 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 a 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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