Coating composition, method for producing same, coating film, exhaust fan and air conditioner

Patent metadata

Field	Value
Publication number	US-10793748-B2
Application number	US-201615564337-A
Country	US
Kind code	B2
Filing date	Feb 10, 2016
Priority date	May 14, 2015
Publication date	Oct 6, 2020
Grant date	Oct 6, 2020

Abstract

Provided is a coating composition containing: water; a water-soluble organic solvent that has a flash pint of at least 80° C. and not more than 200° C. and dissolves a fluorine resin; a fluorine resin; hydrophilic silica particles; and hydrophobic silica particles. The hydrophilic silica particles are preferably contained in the coating composition in an amount of at least 0.001 mass % and not more than 1 mass %. The average particle diameter of the hydrophilic silica particles is preferably at least 5 nm and not more than 30 nm.

First claim

The invention claimed is:

1. A coating film formed from a coating composition comprising:
water;
a water-soluble organic solvent that has a flash point of at least 80° C. and not more than 200° C. and dissolves a fluorine resin;
a fluorine resin;
hydrophilic silica particles; and
hydrophobic silica particles,
wherein a thickness of the coating film is at least 0.2 μm and not more than 3.0 μm.

2. The coating film formed from the coating composition of claim 1 , wherein a static contact angle of the surface of the coating film with water is at least 140° and not more than 170°.

3. A coating film, comprising:
a layer in which hydrophilic silica particles are agglomerated on the surface of a substrate;
hydrophobic silica particles dispersed and arranged on the layer in which the hydrophilic silica particles are aggregate; and
a fluorine resin covering the layer in which the hydrophilic silica particles are aggregated and the hydrophobic silica particles.

4. The coating film of claim 1 , wherein the hydrophilic silica particles are contained in an amount of at least 0.001 mass % and not more than 1 mass % of the coating composition.

5. The coating film of claim 1 , wherein an average particle diameter of the hydrophilic silica particles is at least 5 nm and not more than 30 nm.

6. The coating film of claim 1 , wherein water is contained in an amount of at least 1 mass % and not more than 30 mass % of the coating composition used to form the coating film.

7. The coating film of claim 1 , wherein the coating composition used to form the coating film further comprises flat fine particles that form a card house-like aggregate structure.

Assignees

• Mitsubishi Electric Corp

Inventors

• Yamamoto Yoshinori
• Utsumi Shigeru

Classifications

• B05D2601/22

  Silica · CPC title

• C09D7/62

  modified by treatment with other compounds · CPC title

• C08K2201/003

  Additives being defined by their diameter · CPC title

• F24F1/06

  Separate outdoor units, e.g. outdoor unit to be linked to a separate room comprising a compressor and a heat exchanger · CPC title

• C09D7/61

  inorganic · CPC title