Non-fluorinated water-based superhydrophobic surfaces

Patent metadata

Field	Value
Publication number	US-9803100-B2
Application number	US-201313873614-A
Country	US
Kind code	B2
Filing date	Apr 30, 2013
Priority date	Apr 30, 2013
Publication date	Oct 31, 2017
Grant date	Oct 31, 2017

Abstract

A superhydrophobic surface includes a substrate treated with a non-fluorinated composition, the composition including a hydrophobic component free of fluorine; a filler particle; and water, wherein the composition is at a pH greater than 7, and wherein the hydrophobic component is in an aqueous dispersion. The superhydrophobic surface alternatively includes a substrate treated with a non-fluorinated composition, the composition including a hydrophobic polymer free of fluorine; an exfoliated graphite filler particle including acid functional groups; water; and a stabilizing compound, wherein the composition is at a pH greater than 7, and wherein the hydrophobic polymer is in an aqueous dispersion.

First claim

What is claimed is:

1. A superhydrophobic surface comprising a substrate treated with a non-fluorinated composition comprising:
a water-dispersible hydrophobic component free of fluorine;
a water-dispersible filler particle; and
water, wherein the composition is at a pH greater than 7, wherein the hydrophobic component is in an aqueous dispersion, and wherein the aqueous dispersion is free of organic solvents.

2. The superhydrophobic surface of claim 1 , wherein the hydrophobic component is selected from the group consisting of polymers and nanoparticles.

3. The superhydrophobic surface of claim 1 , wherein the hydrophobic component includes a polyolefin.

4. The superhydrophobic surface of claim 1 , wherein the hydrophobic component includes a co-polymer of olefin and acrylic acid.

5. The superhydrophobic surface of claim 1 , wherein the filler particle has a high aspect ratio.

6. The superhydrophobic surface of claim 1 , wherein the filler particle includes acrylic acid, carboxylic acid, or a combination thereof as a functional group.

7. The superhydrophobic surface of claim 1 , wherein the filler particle includes an exfoliated graphite.

8. The superhydrophobic surface of claim 7 , wherein the exfoliated graphite is selected from graphene, a few layer graphene, and an exfoliated graphite nanoplatelet.

9. The superhydrophobic surface of claim 1 , wherein the composition is free of volatile organic compounds.

10. The superhydrophobic surface of claim 1 , further comprising a stabilizing compound.

11. The superhydrophobic surface of claim 10 , wherein the stabilizing compound is selected from KOH and NH 3 (aq).

12. The superhydrophobic surface of claim 1 , wherein the substrate is a nonwoven web.

13. The superhydrophobic surface of claim 1 , wherein the substrate is a tissue product.

14. The superhydrophobic surface of claim 1 , wherein the filler particle includes an acid functional group.

15. A superhydrophobic surface comprising a substrate treated with a non-fluorinated composition comprising:
a water-dispersible hydrophobic polymer free of fluorine;
a water-dispersible exfoliated graphite filler particle including acid functional groups;
water; and
a stabilizing compound, wherein the composition is at a pH greater than 7, wherein the hydrophobic polymer is in an aqueous dispersion, and wherein the aqueous dispersion is free of organic solvents.

16. The superhydrophobic surface of claim 15 , wherein the hydrophobic polymer includes a polyolefin.

17. The superhydrophobic surface of claim 15 , wherein the filler particle includes acrylic acid, carboxylic acid, or a combination thereof as a functional group.

18. The superhydrophobic surface of claim 15 , wherein the exfoliated graphite is selected from graphene, a few layer graphene, and an exfoliated graphite nanoplatelet.

19. The superhydrophobic surface of claim 15 , wherein the stabilizing compound is selected from KOH and NH 3 (aq).

20. A superhydrophobic surface comprising a substrate treated with a non-fluorinated composition comprising:
a water-dispersible hydrophobic component free of fluorine;
a stabilizing compound, wherein the stabilizing compound is selected from KOH and NH 3 (aq);
a water-dispersible filler particle; and
water, wherein the composition is at a pH greater than 7, wherein the hydrophobic component is in an aqueous dispersion, and wherein the aqueous dispersion is free of organic solvents.

Assignees

• Kimberly Clark Co

Inventors

• Qin Jian
• Waldroup Donald Eugene
• Megaridis Constantine M
• Schutzius Thomas M
• Bayer Ilker S

Classifications

• Y10T428/31938

  Polymer of monoethylenically unsaturated hydrocarbon · CPC title

• C08L2201/54

  Aqueous solutions or dispersions · CPC title

• Y10T442/2164

  Coating or impregnation specified as water repellent · CPC title

• C09D123/06 Primary

  Polyethylene · CPC title

• C09D123/04

  Homopolymers or copolymers of ethene · CPC title