Liquid coloring suspension and colored cementitious composition
AssigneeConstruction Research & Technology GmbH
InventorsJames Curtis Smith, Eric Hevener
Life of this patent
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Abstract
A colored cementitious composition is provided that is composed of hydraulic cement and a liquid coloring suspension. The liquid coloring suspension for cementitious compositions contains polycarboxylate dispersant, pigment, and a polysaccharide thixotropic additive. The liquid coloring suspension has improved viscosity consistency, improved shelf-life, anti-settling and anti-sludging properties, and decreased polycarboxylate dispersant requirements.
Claims24
A liquid coloring suspension for cementitious compositions comprising:
- a) liquid;
- b) polycarboxylate dispersant;
- c) pigment;
- and,
- d) at least one microbially derived polysaccharide thixotropic additive selected from diutan gum, welan gum or combinations thereof;
- wherein the viscosity of the liquid coloring suspension is stable over time.
A colored cementitious composition comprising hydraulic cement to which a liquid coloring suspension has been added, the liquid coloring suspension comprising:
- a) liquid;
- b) polycarboxylate dispersant;
- c) pigment;
- and,
- d) at least one microbially derived polysaccharide thixotropic additive selected from diutan gum, welan gum or combinations thereof;
- wherein the liquid coloring suspension improves the color in the cementitious composition without increasing the water demand.
Dependencies are inferred from the claim text.