Stable, fluid, aqueous pigment dispersions

Details Stable, fluid, aqueous pigment dispersions Stable, fluid, aqueous pigment dispersions

C - Chemistry, Metallurgy

09

B

C09B 63/00 (2006.01) A61K 9/28 (2006.01) C09B 67/10 (2006.01) C09B 67/20 (2006.01) C09C 1/24 (2006.01) C09C 1/36 (2006.01) C09D 17/00 (2006.01)

Patent

CA 2064844

Improved stable, fluid, aqueous dispersion compositions comprise a pigment, an alkali metal, alkaline earth metal or am- monium salt of a linear aliphatic substituted glycine such as a salt of ethylene diamine tetraacetic acid or nitrilo triacetic acid as a stabilizing agent, and water. The dispersion composition may additionally contain a lower alkanol such as methanol and/or a wa- ter soluble plasticizes such as propylene glycol. Coating compositions for use as a film coating for tablets and the like contain the above-described stable, fluid, aqueous dispersion composition, a water soluble plasticizes, a film coating resin, and water. The de- scribed fluid, aqueous dispersion compositions have been found to remain stable for extended periods exceeding six months.

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