Thermal insulation coating composition and thermal insulation coating layer

Patent metadata

Field	Value
Publication number	US-9988981-B2
Application number	US-201414547450-A
Country	US
Kind code	B2
Filing date	Nov 19, 2014
Priority date	Dec 31, 2013
Publication date	Jun 5, 2018
Grant date	Jun 5, 2018

Abstract

Disclosed is a thermal insulation coating composition including: a polymer resin; an aerogel; and an amphiphilic compound including specific functional groups and having a weight average molecular weight of about 200 to about 5000. A thermal insulation coating layer obtained from the thermal insulation coating composition is also provided.

First claim

What is claimed is:

1. A thermal insulation coating composition comprising:
a polymer resin;
an aerogel; and
an amphiphilic compound which includes a reactive functional group including a carboxylic or hydroxyl group at a first end, the phosphate or phosphate ester functional group at a second end, and an alkylene group having about 2 to about 30 carbon atoms which is positioned between the reactive functional group and the phosphate or phosphate ester functional group and has a weight average molecular weight of about 200 to about 5000,
wherein the aerogel has a specific surface area of about 100 to about 1000 cm 2 /g.

2. The thermal insulation coating composition of claim 1 , wherein the thermal insulation coating composition is used at an inner surface of an internal combustion engine or coating of a component of the internal combustion engine.

3. The thermal insulation coating composition of claim 1 , wherein the polymer resin is dispersed in an aqueous or polar solvent.

4. The thermal insulation coating composition of claim 3 , wherein the aqueous or polar solvent comprises at least one selected from the group consisting of methyl ethyl ketone, methyl alcohol, ethyl alcohol, propyl alcohol, n-butyl alcohol, iso-butyl alcohol, tert-butyl alcohol, water, and ethylacetate.

5. The thermal insulation coating composition of claim 1 , wherein the polymer resin is at least one selected from the group consisting of a polyimide, a polyimideamide, a silicone resin, a polyamide, polytetrafluoroalkylene, polyethylene nitrile, polyethersulfone, and poly(meth)acrylate.

6. The thermal insulation coating composition of claim 5 , wherein the polymer resin has a weight average molecular weight of about 3000 to about 300,000.

7. The thermal insulation coating composition of claim 1 , wherein the aerogel is at least one compound selected from the group consisting of a silicon oxide, carbon, a polyimide, and a metal carbide.

8. The thermal insulation coating composition of claim 1 , comprising:
an amount of about 15 to about 95 wt % of the polymer resin dispersed in an aqueous or polar solvent;
an amount of about 1 to about 60 wt % of the aerogel; and
an amount of about 0.1 to about 30 wt % of the amphiphilic compound including at least one phosphate or phosphate ester functional group and at least one reactive functional group and having a weight average molecular weight of about 200 to about 5000.

9. The thermal insulation coating composition of claim 1 , wherein a solid content of the polymer resin in an aqueous or polar solvent is from about 5 to about 75 wt %.

10. A thermal insulation coating layer, comprising: a polymer resin, aerogels respectively dispersed in the polymer resin, and an amphiphilic compound includes a reactive functional group including a carboxylic or hydroxyl group at a first end, the phosphate or phosphate ester functional group at a second end, and an alkylene group having about 2 to about 30 carbon atoms which is positioned between the reactive functional group and the phosphate or phosphate ester functional group and has a weight average molecular weight of about 200 to about 5000,
wherein the aerogel has a specific surface area of about 100 to about 1000 cm 2 /g.

11. The thermal insulation coating layer of claim 10 , wherein the thermal insulation coating layer has peel strength of about 9.5 N or greater with respect to a metal.

12. The thermal insulation coating layer of claim 10 , wherein the thermal insulation coating layer has thermal capacity of about 1350 KJ/m 3 K or less.

13. The thermal insulation coating layer of claim 10 , wherein the thermal insulation coating layer has thermal conductivity of about 0.50 W/m or less.

14. The thermal insulation coating layer of claim 10 , wherein the thermal insulation coating layer has a thickness of about 50 μm to about 500 μm.

15. The thermal insulation coating layer of claim 10 , wherein the thermal insulation coating layer is formed on an inner surface of an internal combustion engine or a component of the internal combustion engine.

16. The thermal insulation coating layer of claim 10 , wherein the amphiphilic compound comprises a compound of Chemical Formula 1:

17. The thermal insulation coating composition of claim 1 , wherein the amphiphilic compound comprises a compound of Chemical Formula 1:

Assignees

• Hyundai Motor Co Ltd

Inventors

• Seo Jiyoun
• Kim Bokyung
• Choi Kwang Hoon
• Lee Seung Woo
• Hong Woong Pyo
• Lyo In Woong
• Baek Hong Kil

Classifications

• C09D183/04

  Polysiloxanes · CPC title

• Y10T428/249953

  Composite having voids in a component [e.g., porous, cellular, etc.] · CPC title

• C09D201/00

  Coating compositions based on unspecified macromolecular compounds · CPC title

• C09D5/00

  Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced {(electrically insulating plastics, resins or waxes H01B3/30)}; Filling pastes · CPC title

• C09D7/63

  organic · CPC title