Phosphate ester pigment dispersant

Details Phosphate ester pigment dispersant Phosphate ester pigment dispersant

C - Chemistry, Metallurgy

09

D

6/217

C09D 17/00 (2006.01) B01F 17/00 (2006.01) B01F 17/14 (2006.01) C09B 67/46 (2006.01)

Patent

CA 1333649

An aqueous pigment dispersion containing as the dispersing agent a phosphate ester salt having the general formula: Image wherein: R and R' are the same or different linear or branched alkyl groups of 2 to 12 carbon atoms; k and 1 are the same or different integers having 2 value of 1 or 2; x and y are the same or different integers having values of greater than 1 but less than 13; and, M is a cation selected from the group consisting of potassium, sodium and ammonium. The dispersing agent is especially useful to disperse azo type pigments. The resulting pigment dispersion exhibits improved stability.

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