Composition and method for controlling the wettability of surfaces

Patent metadata

Field	Value
Publication number	US-10047247-B2
Application number	US-201314370867-A
Country	US
Kind code	B2
Filing date	Feb 4, 2013
Priority date	Feb 9, 2012
Publication date	Aug 14, 2018
Grant date	Aug 14, 2018

Abstract

The present invention relates to a composition comprising hedge-hog shaped particles, at least one binder, and at least one hydrophobizing agent and/or at least one hydrophilizing agent, a method for controlling the wettability of substrate surfaces using these compositions, as well as a material comprising these compositions.

First claim

The invention claimed is:

1. A composition comprising:
a) a mixture of hydrophilized hedgehog shaped particles pre-treated and coated with at least one hydrophilizing agent but not a hydrophobizing agent and hydrophobized hedgehog shaped particles pre-treated and coated with at least one hydrophobizing agent but not a hydrophilizing agent, wherein the hedgehog shaped particles are composed of a calcium carbonate containing material, and
b) at least one binder.

2. The composition according to claim 1 , wherein the hedgehog shaped particles are composed of aragonitic precipitated calcium carbonate in a form of clusters of needle like crystals.

3. The composition according to claim 1 , wherein the hedgehog shaped particles are clusters and/or aggregates of scalenohedral precipitated calcium carbonate.

4. The composition according to claim 1 , wherein the hedgehog shaped particles have a BET specific surface area of from 1 to 50 m 2 /g, measured using nitrogen and the BET method according to ISO 9277.

5. The composition according to claim 1 , wherein the hedgehog shaped particles have a BET specific surface area of from 2 to 40 m 2 /g, measured using nitrogen and the BET method according to ISO 9277.

6. The composition according to claim 1 , wherein the hedgehog shaped particles have a BET specific surface area of from 11 to 35 m 2 /g, measured using nitrogen and the BET method according to ISO 9277.

7. The composition according to claim 1 , wherein the hedgehog shaped particles have a BET specific surface area of from 15 to 20 m 2 /g, measured using nitrogen and the BET method according to ISO 9277.

8. The composition according to claim 1 , wherein the hedgehog shaped particles have a weight median particle diameter d 50 of from 1 μm to 50 μm.

9. The composition according to claim 1 , wherein the hedgehog shaped particles have a weight median particle diameter d 50 of from 2 μm to 40 μm.

10. The composition according to claim 1 , wherein the hedgehog shaped particles have a weight median particle diameter d 50 of from 3 μm to 30 μm.

11. The composition according to claim 1 , wherein the hydrophobizing agent is selected from the group consisting of fatty acids, stearic acid, palmitic acid, and their salts; alkylketene dimer; polyacrylamide resins; silicone resins, polysiloxanes, polysiloxane modified with a functional silicone resin, and any mixture thereof.

12. The composition according to claim 1 , wherein the hydrophilizing agent is selected from the group consisting of polyacrylic acids, salts of 1-hydroxyethane-1,1-diphosphonic acid, alkali metal salts thereof, potassium salts thereof; chelates of 1-hydroxyethane-1,1-diphosphonic acid, aluminium hydroxide chelates thereof, aluminium hydroxide/1-hydroxyethane-1,1-diphosphonic acid chelates having a weight ratio of 1:5, and any mixture thereof.

13. The composition according to claim 1 , wherein the at least one hydrophobizing agent and the least one hydrophilizing agent are present in a total amount of from 0.1 to 10 wt %, based on the weight of the hedgehog shaped particles.

14. The composition according to claim 1 , wherein the at least one hydrophobizing agent and the least one hydrophilizing agent are present in a total amount of from 0.2 to 5 wt %, based on the weight of the hedgehog shaped particles.

15. The composition according to claim 1 , wherein the at least one hydrophobizing agent and the least one hydrophilizing agent are present in a total amount of from 0.3 to 2.4 wt %, based on the weight of the hedgehog shaped particles.

16. The composition according to claim 1 , wherein the at least one hydrophobizing agent and the least one hydrophilizing agent are present in a total amount of from 0.4 to 1.9 wt %, based on the weight of the hedgehog shaped particles.

17. The composition according to claim 1 , wherein the at least one hydrophobizing agent and the least one hydrophilizing agent are present in a total amount of from 0.5 to 1.5 wt %, based on the weight of the hedgehog shaped particles.

18. The composition according to claim 1 , wherein the binder is selected from the group consisting of latex binders, hybrid binder systems; homopolymers or copolymers of acrylic and/or methacrylic acids, itaconic acid; acid esters, ethylacrylate, or butyl acrylate; styrene, unsubstituted or substituted vinyl chloride, vinyl acetate, ethylene, butadiene, acrylamides and acrylonitriles; silicone resins, water dilutable alkyd resins, acrylic/alkyd resin combinations, polyvinyl alcohol, natural oils, linseed oil, and any mixture thereof.

19. The composition according to claim 1 , wherein the binder is present in an amount of up to 250 wt %, based on the weight of the hedgehog shaped particles.

20. The composition according to claim 1 , wherein the binder is present in an amount of up to 200 wt %, based on the weight of the hedgehog shaped particles.

21. The composition according to claim 1 , wherein the binder is present in an amount of up to 150 wt %, based on the weight of the hedgehog shaped particles.

22. The composition according to claim 1 , wherein the binder is present in an amount of up to 120 wt %, based on the weight of the hedgehog shaped particles.

23. The composition according to claim 1 , wherein the binder is present in an amount of 1 to 50 wt %, based on the weight of the hedgehog shaped particles.

24. The composition according to claim 1 , wherein the binder is present in an amount of 3 to 25 wt %, based on the weight of the hedgehog shaped particles.

25. The composition according to claim 1 , wherein the binder is present in an amount of 5 to 20 wt %, based on the weight of the hedgehog shaped particles.

26. The composition according to claim 1 , wherein the binder is present in an amount of 10 to 15 wt %, based on the weight of the hedgehog shaped particles.

27. The composition according to claim 1 , which is in the form of a solution or dispersion in a liquid medium, or is in the form of a medium selected from the group consisting of water, alcohol ethers, alcohols, aliphatic hydrocarbons, esters, and any mixture thereof.

28. The composition according to claim 27 , further comprising additives selected from the group consisting of dispersing agents, siliconizing agents, thickeners, rheology modifiers, anti-settling agents, defoamers, antioxidants, bluing agents, surfactants, crosslinkers, flame retardants, catalysts, pH buffers, fillers, dyes, pigments, optical brightners, waxes, coalescence agents, biocides and any mixture thereof.

29. A coating formulation comprising the composition according to claim 1 .

30. A material comprising the composition according to claim 1 , wherein the material is selected from the group consisting of paper, board, wall-paper, wood, wood composites, lake board, plastics, foil, concrete, coated or uncoated rendering, plaster, metals, ceramics, stone, brickstone and glass.

Assignees

• Omya Int Ag

Inventors

• Schoelkopf Joachim
• Weitzel Hans-Joachim

Classifications

• C09D129/04

  Polyvinyl alcohol; Partially hydrolysed homopolymers or copolymers of esters of unsaturated alcohols with saturated carboxylic acids · CPC title

• D21H19/385

  Oxides, hydroxides or carbonates · CPC title

• C01P2004/61

  Micrometer sized, i.e. from 1-100 micrometer · CPC title

• B05D5/00

  Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures · CPC title

• C01P2006/12

  Surface area · CPC title