Polymeric pigment dispersant utilized as a grind resin for...

Details Polymeric pigment dispersant utilized as a grind resin for... Polymeric pigment dispersant utilized as a grind resin for...

2005-02-01

2005-02-01

Cain, Edward J. (Department: 1714)

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

At least one aryl ring which is part of a fused or bridged...

C524S602000, C252S363500, C560S127000, C562S509000

Reexamination Certificate

active

06849686

ABSTRACT:
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 dipentaerylthritol, 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.

REFERENCES:
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patent: 0 803 556 (1995-12-01), None
English Language International Search Report for PCT/US 02/24163, International Filing Date Jul. 23, 2002, p. 1-3.

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