UV-resistant superhydrophobic coating compositions

Patent metadata

Field	Value
Publication number	US-10370514-B2
Application number	US-201514745384-A
Country	US
Kind code	B2
Filing date	Jun 20, 2015
Priority date	Jun 23, 2014
Publication date	Aug 6, 2019
Grant date	Aug 6, 2019

Abstract

A coating composition for a substrate includes a polymer binder, one or more hydrophobic silicon dioxide compositions, and one or more UV protection agents. The polymer binder can include a fluoropolymer or an epoxy polymer resin. The coating composition can also include molybdenum disulfide.

First claim

What is claimed:

1. A coating composition for a substrate, the coating composition comprising:
a polymer binder comprising a fluoropolymer or an epoxy polymer resin;
one or more hydrophobic silicon dioxide compositions;
molybdenum disulfide; and
one or more UV protection agents;
wherein the coating composition includes at least about 50% by weight of the polymer binder, from about 0.5% to about 15% by weight of one or more hydrophobic silicon dioxide compositions, from about 0.1% to about 15% by weight of molybdenum disulfide, and from about 0.1% to about 10% by weight of one or more UV protection agents.

2. The coating composition of claim 1 , wherein the polymer binder has a glass transition temperature or a melting point in a range from 75° C. to 350° C.

3. The coating composition of claim 1 , wherein the binder comprises at least one fluoropolymer selected from the group consisting of polytetrafluoroethylene (PTFE), polyvinylidene difluoride (PVDF), and polyhexafluoropropylene (PHFP).

4. The coating composition of claim 1 , wherein the binder comprises at least one epoxy polymer resin having a viscosity at a temperature from about 20° C. to about 27° C. and prior to initiation of curing in the range from 1 centipoise to 25,000 centipoise.

5. The coating composition of claim 1 , wherein at least one of the UV protection agents comprises zinc oxide.

6. The coating composition of claim 1 , wherein each of the one or more hydrophobic silicon dioxide compositions comprises at least one functional group selected from the group consisting of alkyl, alkoxy, silyl, alkoxysilyl and siloxy.

7. A conductor coated with the coating composition of claim 1 .

8. A conductor comprising a plurality of stranded wires, wherein at least one stranded wire is coated with the coating composition of claim 1 .

9. The coating composition of claim 1 , wherein
a contact angle of a water droplet formed on the coating composition is at least 140° after exposure of the coating composition to UV radiation of at least about 1 W/m 2 for a time period of at least about 150 hours.

10. The coating composition of claim 6 , wherein each of the one or more functional groups is selected from the group consisting of methyl chlorosilanes, hexamethyldisilazane (HMDS), polydimethylsiloxane (PDMS), octylsilane, hexadecylsilane, methacrylsilane, dimethyldichlorosilane (DDS), and octamethylcyclotetrasiloxane.

11. The conductor of claim 7 , wherein the conductor comprises a bare overhead conductor.

12. The conductor of claim 7 , wherein an exterior surface of the conductor is coated with the coating composition at a thickness from about 0.00001 inch to about 0.030 inch.

13. The conductor of claim 7 , wherein the conductor is a grounding bare wire.

14. The conductor of claim 7 , wherein the conductor comprises a solid conductor material comprising copper, aluminum or aluminum alloy.

15. The coating composition of claim 9 , wherein the contact angle of a water droplet formed on the coating composition is at least 140° after exposure of the coating composition to UV radiation of at least about 1 W/m 2 for a time period of at least about 470 hours.

16. The conductor of claim 11 , wherein the conductor comprises aluminum, steel or a carbon fiber polymer composite material.

Assignees

• Southwire Co Llc

Inventors

• Hawig Yuhsin

Classifications

• C09D163/00

  Coating compositions based on epoxy resins; Coating compositions based on derivatives of epoxy resins · CPC title

• H01B1/026

  Alloys based on copper · CPC title

• H01B1/023

  Alloys based on aluminium · CPC title

• H01B3/445

  from vinylfluorides or other fluoroethylenic compounds · CPC title

• C08K3/36

  Silica · CPC title