New protective colloids in latices with improved film...

Details New protective colloids in latices with improved film... New protective colloids in latices with improved film...

C - Chemistry, Metallurgy

08

J

C08J 3/00 (2006.01) C08F 2/24 (2006.01)

Patent

CA 2334796

The present invention provides an emulsion polymerization process comprising polymerizing a monomer composition on the basis of ethylenically unsaturated monomers in the presence of water and of at least one protective colloid. The protective colloid is chosen so that the difference between the glass transition temperature and the minimum film formation temperature of the emulsion polymerized product is significantly increased compared to emulsion polymerization products produced with conventional protective colloids.

La présente invention concerne un procédé de polymérisation d'émulsion qui comporte une étape de polymérisation d'une composition de monomère à partir de monomères éthyléniquement insaturés en présence d'eau et d'au moins un colloïde protecteur. Le colloïde protecteur est choisi de façon à accroître considérablement la différence entre la température de transition vitreuse et la température minimale de formation de film du produit polymérisé d'émulsion, par rapport à des produits de polymérisation d'émulsion produits à l'aide de colloïdes protecteurs classiques.

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