Iron oxide pigment suspensions and slurries
AssigneeMobay Corporation
InventorHans J. De Witte
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Abstract
Iron oxide slurries and suspensions are made from water, iron oxide pigments and a dispersing agent which is water soluble salt of citric acid or tartaric acid. The preferred dispersing agents are the ammonium, sodium and potassium salts of citric acid and tartaric acid. The sodium salts of citric acid are particularly preferred. A known additive such as a fungicide may be included. To keep the slurries and suspension from settling, stabilizing agents may also be included.
Claims17
An iron oxide pigment-.suspension or slurry comprising
- (a) 24-70 wt. % water,
- (b) 0.05-1.4 wt. % of an additive selected from water soluble salts of citric acid and tartaric acid and,
- (c) 40-75 wt. % iron oxide pigment in which the sum of (a), (b), and (c) is approximately 100 wt. %.
A stabilized oxide slurry or suspension comprising
- (a) 24-60 wt. % water,
- (b) 0.057-0.88 wt. % of an additive selected from sodium, potassium and ammonium salts of citric acid,
- (c) 0.1-0.2 wt. % of fungicide,
- (d) 0.075-0.2 wt.. % xanthan gum and
- (e) 50.0-65.0 wt. % yellow iron oxide pigment
- in which the sum of (a), (b). (c), (d) and (e) is approximately 100 wt. %.
A stabilized iron oxide slurry or suspension comprising
- (a) 24-60 wt. % water,
- (b) 0.057-0.88 wt. % of an additive selected from sodium, potassium and ammonium salts.of citric acid,
- (c) 0.1-0.2 wt. % fungicide,
- (d) 0.075-0.2 wt. % xanthan gum and
- (e) 50.0-75.0 wt. % red iron oxide
- present in quantities such that the sum of (a), (b), (c), (d), and (e) is approximately 100 wt. %.
Dependencies are inferred from the claim text.