Hydrophilic coating system

Patent metadata

Field	Value
Publication number	US-10081732-B2
Application number	US-201715443905-A
Country	US
Kind code	B2
Filing date	Feb 27, 2017
Priority date	Feb 27, 2017
Publication date	Sep 25, 2018
Grant date	Sep 25, 2018

Abstract

A hydrophilic coating system may comprise a second coating disposed on a condensing surface, the second coating comprising a second adhesive agent, a second insolubilizer, a second inorganic compound, and a second antimicrobial agent. The second coating may comprise between 40% and 50% by weight second adhesive agent, between 12% and 16% by weight second insolubilizer, between 30% and 40% by weight second inorganic compound, and between 3% and 4% by weight second antimicrobial agent.

First claim

What is claimed is:

1. A hydrophilic coated system, comprising:
a coating disposed on a condensing surface, the coating comprising an adhesive agent, an insolubilizer, an inorganic compound, and an antimicrobial agent, wherein the coating comprises between 40% and 50% by weight the adhesive agent, between 12% and 16% by weight the insolubilizer, between 30% and 40% by weight the inorganic compound, and between 3% and 4% by weight the antimicrobial agent.

2. The hydrophilic coated system of claim 1 , further comprising a first coating disposed between the coating and the condensing surface, wherein the first coating comprises between 22% and 63% by weight a first adhesive agent, between 7% and 21% by weight a first insolubilizer, between 22% and 42% by weight a first inorganic compound, and between 12% and 17% by weight a first antimicrobial agent.

3. The hydrophilic coated system of claim 1 , wherein the adhesive agent comprises at least one of potassium silicate or lead borosilicate glass frit.

4. The hydrophilic coated system of claim 3 , wherein the insolubilizer comprises at least one of zinc oxide or a salt comprising a silicofluoride anion and a cation of at least one of sodium, potassium, barium, or manganese.

5. The hydrophilic coated system of claim 4 , wherein the inorganic compound comprises at least one of silica or calcium silicate.

6. The hydrophilic coated system of claim 5 , wherein the antimicrobial agent comprises at least one of an arsenic salt, an iodine salt, an iron salt, a mercury salt, a silver salt, or a tin salt.

7. The hydrophilic coated system of claim 6 , wherein the antimicrobial agent comprises silver oxide.

8. A heat exchanger, comprising:
a condensing surface; and
a coating disposed on the condensing surface, the second coating comprising an adhesive agent, an insolubilizer, an inorganic compound, and an antimicrobial agent, wherein the coating comprises between 40% and 50% by weight the adhesive agent, between 12% and 16% by weight the insolubilizer, between 30% and 40% by weight the inorganic compound, and between 3% and 4% by weight the antimicrobial agent.

9. The heat exchanger of claim 8 , further comprising a first coating disposed between the coating and the condensing surface, wherein the first coating comprises between 22% and 63% by weight a first adhesive agent, between 7% and 21% by weight a first insolubilizer, between 22% and 42% by weight a first inorganic compound, and between 12% and 17% by weight a first antimicrobial agent.

10. The heat exchanger of claim 8 , wherein the adhesive agent comprises at least one of potassium silicate or lead borosilicate glass frit.

11. The heat exchanger of claim 10 , wherein the insolubilizer comprises at least one of zinc oxide or a salt comprising a silicofluoride anion and a cation of at least one of sodium, potassium, barium, or manganese.

12. The heat exchanger of claim 11 , wherein the inorganic compound comprises at least one of silica or calcium silicate.

13. The heat exchanger of claim 12 , wherein the antimicrobial agent comprises at least one of an arsenic salt, an iodine salt, an iron salt, a mercury salt, a silver salt, or a tin salt.

14. The heat exchanger of claim 13 , wherein the antimicrobial agent comprises silver oxide.

15. A method of coating a surface, comprising:
creating a slurry comprising an adhesive agent, an insolubilizer, an inorganic compound, an antimicrobial agent, and a water-based solvent, wherein the slurry comprises between 17% and 22% by weight the adhesive agent, between 5% and 7% by weight the insolubilizer, between 14% and 17% by weight the inorganic compound, between 1.2% and 1.5% by weight the antimicrobial agent, and between 54% and 63% by weight the water-based solvent; and
applying the slurry to a first coating disposed on the surface, wherein the first coating comprises a first adhesive agent, a first insolubilizer, a first inorganic compound, a first antimicrobial agent, and a first water-based solvent.

16. The method of claim 15 , further comprising:
applying a first slurry to the surface, the first slurry comprising the first adhesive agent, the first insolubilizer, the first inorganic compound, the first antimicrobial agent, and the first water-based solvent, wherein the first slurry comprises between 10% and 30% by weight the first adhesive agent, between 3% and 10% by weight the first insolubilizer, between 10% and 20% by weight the first inorganic compound, between 0.3% and 1.5% by weight the first antimicrobial agent, and between 30% and 70% by weight the first water-based solvent; and
curing the first slurry to form the first coating on the surface.

17. The method of claim 15 wherein the applying the slurry comprises at least one of spraying or painting the slurry on the first coating, or submerging the surface in the slurry.

18. The method of claim 15 , further comprising curing the slurry on the first coating to form a second coating.

19. The method of claim 15 , wherein the applying the slurry includes the adhesive agent comprising at least one of potassium silicate or lead borosilicate glass frit, the insolubilizer comprising zinc oxide, and the inorganic compound comprising at least one of silica or calcium silicate.

20. The method of claim 19 , wherein the applying the slurry includes the antimicrobial agent comprising silver oxide.

Assignees

• Hamilton Sundstrand Corp

Inventors

• Steele John W
• Metselaar Carol L
• Peyton Barbara M

Classifications

• F28F2265/20

  for preventing development of microorganisms · CPC title

• F28F2245/02

  hydrophilic · CPC title

• C09D1/00

  Coating compositions, e.g. paints, varnishes or lacquers, based on inorganic substances · CPC title

• C09D5/14 Primary

  Paints containing biocides, e.g. fungicides, insecticides or pesticides (C09D5/16 takes precedence) · CPC title

• F28F19/04

  of rubber; of plastics material; of varnish · CPC title