Pigment dispersant

Details Pigment dispersant Pigment dispersant

C - Chemistry, Metallurgy

09

D

C09D 7/02 (2006.01) C08F 293/00 (2006.01) C09D 17/00 (2006.01)

Patent

CA 2713846

A pigment dispersant is disclosed comprising a tri-block copolymer having a first block comprising a glycidyl (meth)acrylate reacted with a napthoic acid, a second block comprising (meth)acrylic acid alkyl esters, and a third block comprising (meth)acrylic acid alkyl esters, wherein said third block is different from said second block. The dispersant is suited for use in a nanoparticulate dispersion comprising pigment particles having an average primary particle size of less than 100 nm.

L'invention porte sur un dispersant de pigment qui comporte un copolymère à trois blocs ayant un premier bloc comportant un (méth)acrylate de glycidyle ayant réagi avec un acide naphtoïque, un second bloc comportant des esters alkyliques d'acide (méth)acrylique et un troisième bloc comportant des esters alkyliques d'acide (méth)acrylique, ledit troisième bloc étant différent dudit second bloc. Le dispersant est approprié pour être utilisé dans une dispersion de nanoparticules comportant des particules de pigment ayant une dimension moyenne de particule primaire inférieure à 100 nm.

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