C - Chemistry – Metallurgy – 08 – F
Patent
C - Chemistry, Metallurgy
08
F
C08F 293/00 (2006.01)
Patent
CA 2393637
The invention relates to a surface chemistry modified latex which can be obtained by carrying out radical polymerization in emulsion in the presence of at least one ethylenically unsaturated monomer or at least one polymer having ethylinically unsaturated residual bonds, at least one radical polymerization, at least one single, double or triple block polymer which is soluble or dispersible in water, comprising an active group at the end thereof, capable of forming a radical, and chosen from dithioesters, xanthates, thioether-thiones and dithiocarbamates. The invention also relates to redispersible powders which can be obtained by drying said latexes.
La présente invention a pour objet un latex à chimie de surface modifiée, susceptible d'être obtenu en effectuant une polymérisation radicalaire en émulsion, en présence : d'au moins un monomère éthyléniquement insaturé ou au moins un polymère possédant des liaisons éthyléniquement insaturées résiduelles, d'au moins un initiateur de polymérisation radicalaire, d'au moins un polymère monobloc, dibloc ou tribloc, soluble et/ou dispersable dans l'eau, comprenant à son extrémité un groupement actif, susceptible de former un radical, et choisi parmi les dithioesters, les xanthates, les thioethers- thiones, les dithiocarbamates. Elle a de même pour objet des poudres redispersables susceptibles d'être obtenues par séchage desdits latex.
Bett William
Castaing Jean-Christophe
D'allest Jean-Francois
Rhodia Chimie
Robic
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