Manufacturing method for porous thermal insulation coating layer, porous thermal insulation coating layer and internal combustion engine using the same

Patent metadata

Field	Value
Publication number	US-2020255672-A1
Application number	US-202016861369-A
Country	US
Kind code	A1
Filing date	Apr 29, 2020
Priority date	Jul 12, 2016
Publication date	Aug 13, 2020
Grant date	—

Abstract

Disclosed are a manufacturing method for a porous thermal insulation coating layer, a porous thermal insulation coating layer with substantially reduced thermal conductivity and volumetric heat capacity and an internal combustion engine including the porous thermal insulation coating layer thereby having excellent durability.

First claim

1 . A method of manufacturing a porous thermal insulation coating layer comprising:
coating a reaction product obtainable from a reaction of metal alkoxide containing at least one selected from the group consisting of aluminum, zirconia, titanium and silicon with alcohol and water; drying the coated reaction product at a first temperature; and performing a thermal treatment at a second temperature that is greater than the first temperature and less than about 300° C.

2 . The method of claim 1 , wherein the second temperature ranges from about 20° C. to about 220° C. and is greater than the first temperature.

3 . The method of claim 1 , wherein
the performing of the thermal treatment at the second temperature is conducted for about 12 hours to 48 hours.

4 . The method of claim 1 , wherein the first temperature ranges from about 30° C. to about 100° C.

5 . The method of claim 1 , wherein the second temperature ranges from about 100° C. to about 250° C.

6 . The method of claim 1 , wherein an amount of about 10 to 100 parts by weight of the alcohol relative to 100 parts by weight of the metal alkoxide of the metal is reacted.

7 . The method of claim 1 , wherein an amount of about 110 to 500 parts by weight of the water relative to 100 parts by weight of the metal alkoxide of the metal is reacted.

8 . The method of claim 1 , further comprising,
before the drying of the coated reaction product at the first temperature, adding a solution including a silane-based compound to the product of the coating step.

9 . The method of claim 8 , wherein the silane-based compound comprises a silane compound substituted with at least one functional group selected from the group consisting of a C1-C10 alkyl group and a C1-C10 alkoxy group.

10 . The method of claim 1 , wherein the coated reaction product is dried at the first temperature for about 10 minutes to 500 minutes.

11 - 20 . (canceled)

Assignees

• Hyundai Motor Co Ltd
• Kia Motors Corp

Inventors

• Kim Bokyung
• Lyo In Woong
• Hong Woong Pyo
• Baek Hong Kil
• Noh Su Jung
• Oh Seung Jeong
• Lee Seung Woo

Classifications

• F02B77/11

  Thermal or acoustic insulation · CPC title

• B05D7/14

  to metal, e.g. car bodies (involving a chemical reaction between the metal and the coating C23) · CPC title

• Y02T50/60

  Efficient propulsion technologies, e.g. for aircraft · CPC title

• C23C18/1254

  Sol or sol-gel processing · CPC title

• B05D3/0254

  After-treatment · CPC title