Preparation of aqueous styrene-butadiene polymer dispersions

Details Preparation of aqueous styrene-butadiene polymer dispersions Preparation of aqueous styrene-butadiene polymer dispersions

C - Chemistry, Metallurgy

08

F

C08F 212/08 (2006.01) C08F 2/22 (2006.01) C08F 2/38 (2006.01) C08F 212/10 (2006.01) C08F 236/10 (2006.01) D21H 17/35 (2006.01) D21H 19/36 (2006.01)

Patent

CA 2357510

A process for preparing an aqueous styrene-butadiene polymer dispersion by free-radical aqueous emulsion polymerization of a monomer mixture M comprising - styrene, - butadiene, and if desired - up to 30% by weight, per 100% by weight of monomers, of ethylenically unsaturated comonomers other than styrene and butadiene; by a monomer feed technique, said process comprising supplying to the polymerization reaction in the course thereof a regulator system comprising, based on 100% by weight of monomers, - from 0.02 to 0.4% by weight of terpinolene and - from 0.5 to 2% by weight of an organic compound S containing at least one SH group.

L'invention concerne un processus de préparation de dispersions de K résine aqueuses par polymérisation en émulsion aqueuse de radicaux libres d'un mélange de monomère M composé de - styrène, - butadiène et, si on veut - jusqu'à 30 % en poids, par 100 % en poids de monomères, de comonomères éthyléniques insaturés, autres que le styrène et le butadiène; au moyen d'une technique d'apport de monomères, ledit processus fournit à la réaction de polymérisation un système régulateur comprenant, 100 % en poids de monomères, - de 0,02 à 0,4 % en poids de terpinolène et - de 0,5 à 2 % en poids d'un composé organique S contenant au moins un groupe SH.

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