Liquid coloring suspension and colored cementitious composition
First Claim
Patent Images
1. 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.
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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.
57 Citations
24 Claims
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1. A liquid coloring suspension for cementitious compositions comprising:
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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. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A colored cementitious composition comprising hydraulic cement to which a liquid coloring suspension has been added, the liquid coloring suspension comprising:
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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. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24)
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Specification