C - Chemistry – Metallurgy – 09 – B
Patent
C - Chemistry, Metallurgy
09
B
C09B 67/38 (2006.01) B01F 17/00 (2006.01) C09D 7/02 (2006.01) C09D 17/00 (2006.01)
Patent
CA 2445485
The present invention is directed to a polymeric pigment dispersant to be used as a grind resin to incorporate pigment into a pigment dispersion for a coating composition. The polymeric pigment dispersant is the reaction product of dipentaerythritol, hexahydrophthalic anhydride, glycidylneodecanoate, dimethylethanolamine, and polyphosphoric acid. The present invention is also directed to a method of preparing the polymeric pigment dispersant. In this method, the dipentaerythritol and the hexahydrophthalic anhydride are polymerized to form an intermediate compound. Next, an epoxy group of the glycidylneodecanoate reacts with the intermediate compound, and then the dimethylethanolamine salts the intermediate compound. Finally, the polyphosphoric acid is added to form the completed polymeric pigment dispersant. The polymeric pigment dispersant has improved stability in the pigment dispersion and is utilized for efficient wetting and grinding of the pigment in the pigment dispersion.
L'invention concerne un dispersant polymérique de pigment utilisé en tant que résine de broyage permettant d'incorporer un pigment dans une dispersion de pigment destinée à une composition de revêtement. Le dispersant polymérique de pigment est le produit de réaction de dipentaérythritol, d'anhyride hexahydrophtalique, de glycidylnéodécanoate, de diméthyléthanolamine, et d'acide polyphosphorique. L'invention concerne aussi un procédé de préparation du dispersant polymérique de pigment. Dans ce procédé, le dipentaérythritol et l'anhydride hexahydrophtalique sont polymérisés afin de former un composé intermédiaire. Puis, un groupe époxy du glycidylnéodécanoate réagit avec le composé intermédiaire et la diméthyléthanolamine salifie le composé intermédiaire. Finalement, l'acide polyphosphorique ajouté permet de former complètement le dispersant polymérique. Ce dispersant possède une stabilité améliorée dans la dispersion de pigment et il est utilisé afin d'assurer un mouillage et un broyage efficaces du pigment dans la dispersion de pigment.
Harris Paul
Michalec Joseph
Ramesh Swaminathan
Basf Corporation
Robic
LandOfFree
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