Latex binders, aqueous coatings and paints having...

C - Chemistry – Metallurgy – 08 – K

Patent

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Details

C08K 5/00 (2006.01) B01F 17/40 (2006.01) C08J 3/02 (2006.01) C09D 7/12 (2006.01)

Patent

CA 2748810

Disclosed are latex polymers and an aqueous coating compositions having excellent freeze-thaw stability, open time, stain resistance, low temperature film formation, foam resistance, block resistance, adhesion, water sensitivity and a low-vac content. The latex polymer and aqueous coating compositions include a latex polymer derived from a monomer copolymerized or blended with an alkoxylated compound, for example an alkoxylated tristyrytphenol or an alkoxylated tributylphenol. Also provided is an aqueous coating composition including at least one latex polymer, at least one pigment, water and at least one freeze-thaw additive. Typically, the freeze-thaw additive is added in an amount greater than about 1.3%, 2%, 4%, 75%, 10% or 20% by weight of the polymer.

La présente invention concerne des polymères de latex et des compositions aqueuses de revêtement présentant d'excellentes propriétés en termes de stabilité au gel-dégel, de temps ouvert, de résistance aux taches, de formation de film à basse température, de résistance au moussage, de résistance au blocage, d'adhérence, de sensibilité à l'eau et de faible teneur en COV. Lesdits polymères et lesdites compositions comprennent un polymère de latex dérivé de monomères copolymérisés ou mélangés avec un composé alcoxylé, par exemple du tristyrylphénol alcoxylé ou du tributylphénol alcoxylé. L'invention concerne également une composition aqueuse de revêtement comprenant au moins un polymère de latex, au moins un pigment, de l'eau et au moins un additif de stabilité au gel-dégel. Ledit additif est typiquement ajouté dans des proportions supérieures à environ 13 %, 2 %, 4 %, 75 %, 10 % ou 20 % en poids du polymère.

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