Liquid coloring suspension and colored cementitious composition

• US 9,850,166 B2
• Filed: 10/13/2015
• Issued: 12/26/2017
• Est. Priority Date: 02/03/2015
• Status: Active Grant

• Current Assignee: Construction Research & Technology GmbH (BASF SE)
• Original Assignee: Construction Research & Technology GmbH (BASF SE)
• Inventors: Smith, James Curtis, Hevener, Eric
• Primary Examiner(s): Green, Anthony J
• Application Number:
  US14/881,769
• Publication Number:
  US 20160221874A1
• Time in Patent Office: 805 Days
• CPC Class Codes: C04B 14/022 Carbon
• CPC Class Codes: C04B 14/04 Silica-rich materials; Silicates
• CPC Class Codes: C04B 14/048 Granite
• CPC Class Codes: C04B 14/06 Quartz; Sand
• CPC Class Codes: C04B 14/106 Kaolin
• CPC Class Codes: C04B 14/28 of calcium
• CPC Class Codes: C04B 14/30 Oxides other than silica ferrites C04B14/363
• CPC Class Codes: C04B 14/303 Alumina
• CPC Class Codes: C04B 14/305 Titanium oxide, e.g. titanates
• CPC Class Codes: C04B 14/307 Chromium oxide
• CPC Class Codes: C04B 14/308 Iron oxide
• CPC Class Codes: C04B 14/36 Inorganic materials not provided for in groups C04B14/022 and C04B14/04 - C04B14/34
• CPC Class Codes: C04B 14/42 Glass
• CPC Class Codes: C04B 16/00 Use of organic materials as fillers, e.g. pigments, for mortars, concrete or artificial stone; Treatment of organic materials specially adapted to enhance their filling properties in mortars, concrete or artificial stone
• CPC Class Codes: C04B 18/08 Flue dust , i.e. fly ash
• CPC Class Codes: C04B 18/142 Steelmaking slags, converter slags
• CPC Class Codes: C04B 18/146 Silica fume
• CPC Class Codes: C04B 20/0036 Microsized or nanosized
• CPC Class Codes: C04B 20/0048 Fibrous materials
• CPC Class Codes: C04B 2103/0088 Compounds chosen for their latent hydraulic characteristics, e.g. pozzuolanes
• CPC Class Codes: C04B 2103/12 : Set accelerators
• CPC Class Codes: C04B 2103/302 : Water reducers
• CPC Class Codes: C04B 2103/304 : Air-entrainers
• CPC Class Codes: C04B 2103/408 : Dispersants
• CPC Class Codes: C04B 2103/46 : Water-loss or fluid-loss reducers, hygroscopic or hydrophilic agents, water retention agents
• CPC Class Codes: C04B 2103/50 : Defoamers, air detrainers
• CPC Class Codes: C04B 2103/54 : Pigments; Dyes
• CPC Class Codes: C04B 2103/58 : Shrinkage reducing agents
• CPC Class Codes: C04B 2103/603 : Agents for controlling alkali-aggregate reactions
• CPC Class Codes: C04B 2103/61 : Corrosion inhibitors
• CPC Class Codes: C04B 2103/65 : Water proofers or repellants
• CPC Class Codes: C04B 2103/67 : Biocides
• CPC Class Codes: C04B 2103/69 : Fungicides
• CPC Class Codes: C04B 2111/82 : Coloured materials
• CPC Class Codes: C04B 24/125 : Compounds containing one or more carbon-to-nitrogen double or triple bonds, e.g. imines
• CPC Class Codes: C04B 24/2647 : containing polyether side chains
• CPC Class Codes: C04B 24/38 : Polysaccharides or derivatives thereof C04B24/243 takes precedence
• CPC Class Codes: C04B 28/04 : Portland cements
• CPC Class Codes: C04B 38/10 : by using foaming agents C04B38/02 takes precedenceor by using mechanical means, e.g. adding preformed foam
• CPC Class Codes: C04B 40/0039 : Premixtures of ingredients
• CPC Class Codes: Y02W 30/91 : Use of waste materials as fillers for mortars or concrete

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.

Claims

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.

2. The liquid coloring suspension of claim 1, wherein the polysaccharide is diutan gum.

3. The liquid coloring suspension of claim 1, wherein the amount of polycarboxylate dispersant solids are from about 0.5% to about 3%, pigment solids are from about 50% to about 75%, and the polysaccharide thixotropic additive is from about 0.025% to about 1%, based on the total weight of the liquid coloring suspension.

4. The liquid coloring suspension of claim 1, wherein the amount of polycarboxylate dispersant solids are from about 1% to about 2.5%, pigment solids are from about 53% to about 70%, and thixotropic additive is from about 0.1% to about 0.7%, based on the total weight of the liquid coloring suspension.

5. The liquid coloring suspension of claim 1, wherein the liquid comprises water.

6. The liquid coloring suspension of claim 1, wherein the pigment comprises an inorganic pigment.

7. The liquid coloring suspension of claim 6, wherein the inorganic pigment comprises carbon black or a metal containing pigment that comprises at least one of iron oxide, chromium oxide, aluminum oxide, lead chromate, titanium oxide, zinc white, zinc oxide, zinc sulfide, lead white, iron manganese black, cobalt green, manganese blue, manganese violet, cadmium sulfoselenide, chromium orange, nickel titanium yellow, chromium titanium yellow, cadmium sulfide, zinc yellow, cobalt blue, ultramarine blue, or mixtures thereof.

8. The liquid coloring suspension of a claim 1, wherein the pigment comprises an organic pigment.

9. The liquid coloring suspension of claim 8 wherein the organic pigment comprises phthalocyanine.

10. The liquid coloring suspension of claim 1, further comprising at least one of additional dispersant, water reducer, fungicidal admixture, insecticidal admixture, or germicidal admixture.

11. 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.

12. The liquid coloring suspension of claim 11, wherein the polysaccharide is diutan gum.

13. The colored cementitious composition of claim 11, wherein the liquid comprises water.

14. The colored cementitious composition of claim 11, wherein the pigment comprises an inorganic pigment.

15. The colored cementitious composition of claim 14 wherein the inorganic pigment comprises carbon black or a metal containing pigment that comprises at least one of iron oxide, chromium oxide, aluminum oxide, lead chromate, titanium oxide, zinc white, zinc oxide, zinc sulfide, lead white, iron manganese black, cobalt green, manganese blue, manganese violet, cadmium sulfoselenide, chromium orange, nickel titanium yellow, chromium titanium yellow, cadmium sulfide, zinc yellow, cobalt blue, ultramarine blue, or mixtures thereof.

16. The colored cementitious composition of claim 11, wherein the pigment comprises an organic pigment.

17. The colored cementitious composition of claim 16 wherein the organic pigment comprises phthalocyanine.

18. The colored cementitious composition of claim 11, wherein the amount of polycarboxylate dispersant solids are from about 0.0008% to about 0.51%, pigment solids are from about 0.1% to about 10%, and thixotropic additive is from about 0.00008% to about 0.17%, by total dry weight of cementitious binder.

19. The colored cementitious composition of claim 11, wherein the amount of polycarboxylate dispersant solids are from about 0.004% to about 0.25%, pigment solids are from about 0.25% to about 6%, and thixotropic additive is from about 0.0004% to about 0.07%, by total dry weight of cementitious binder.

20. The colored cementitious composition of claim 11, having a water to cement ratio of about 0.25 to about 0.7.

21. The colored cementitious composition of claim 11, wherein the cement comprises at least one of portland cement, modified portland cement, masonry cement, or mixtures thereof.

22. The colored cementitious composition of claim 11, further comprising a cement admixture or additive, other than the liquid coloring suspension, that comprises at least one of air entrainer, set accelerator, set retarder, air detraining agent, foaming agent, corrosion inhibitor, shrinkage reducing admixture, crack reducing admixture, additional dispersant, water reducer, fiber, pozzolan, strength enhancing agents, rheology modifying agent, water repellent, wetting agent, water soluble polymer, dampproofing admixture, gas former, permeability reducer, pumping aid, fungicidal admixture, germicidal admixture, insecticidal admixture, aggregate, alkali-reaction reducer, bonding admixture, polymeric microspheres, or mixtures thereof.

23. The colored cementitious composition of claim 22, wherein the aggregate comprises at least one of silica, quartz, crushed marble, glass spheres, granite, limestone, calcite, feldspar, alluvial sands, or sand.

24. The colored cementitious composition of claim 22, wherein the pozzolan comprises at least one of natural pozzolan, metakaolin, fly ash, silica fume, calcined clay, or blast furnace slag.