Composition for laminated coating film comprising iron oxide particles coated with silicon oxide

Patent metadata

Field	Value
Publication number	US-2017292028-A1
Application number	US-201615532055-A
Country	US
Kind code	A1
Filing date	Oct 5, 2016
Priority date	Oct 5, 2015
Publication date	Oct 12, 2017
Grant date	—

Abstract

The object of the present invention is to provide a composition for a laminated coating film having designability to a coated body and weather resistance. The present invention provides a composition for a laminated coating film, comprising silicon oxide-coated iron oxide particles, wherein at least a part of the surface of said iron oxide particles is coated with silicon oxide, wherein the diameter of said iron oxide particles is 1 to 50 nm, and wherein the average reflectivity of said silicon oxide-coated iron oxide particles for the light of the wavelengths of 620 to 750 nm is 25% or less. It is preferable that the transmittance of the dispersion comprising said silicon oxide-coated iron oxide particles for the light of the wavelength of 200 to 420 nm is 2.0% or less, and the transmittance of the same for the light of the wavelength of 620 to 780 nm is 80% or more.

First claim

1 . A composition for a laminated coating film, comprising silicon oxide-coated iron oxide particles, wherein at least a part of the surface of said iron oxide particles is coated with silicon oxide,
wherein the diameter of said iron oxide particles is 1 to 50 nm, and wherein the average reflectivity of said silicon oxide-coated iron oxide particles for the light of the wavelengths of 620 to 750 nm is 25% or less.

2 . The composition for a laminated coating film according to claim 1 , wherein the transmittance of the dispersion comprising said silicon oxide-coated iron oxide particles for the light of the wavelength of 200 to 420 nm is 2.0% or less, and the transmittance of the same for the light of the wavelength of 620 to 780 nm is 80% or more.

3 . The composition for a laminated coating film according to claim 1 , wherein the haze value of said silicon oxide-coated iron oxide dispersion is 2.0% or less at the iron oxide concentration of 2 wt % in the dispersion comprising said silicon oxide-coated iron oxide particles.

4 . The composition for a laminated coating film according to claim 1 , wherein said silicon oxide comprises amorphous silicon oxide.

5 . The composition for a laminated coating film according to claim 1 , wherein said silicon oxide-coated iron oxide particles are the particles wherein at least a part of the surface of one iron oxide particle is coated with silicon oxide, and
wherein the primary particle diameter of said iron oxide particle is 50 nm or less, and the primary particle diameter of said silicon oxide-coated iron oxide particles is 100.5% or more and 190% or less relative to said primary particle diameter of the iron oxide particle.

6 . The composition for a laminated coating film according to claim 5 , wherein said silicon oxide-coated iron oxide particles are core-shell type silicon oxide-coated iron oxide particles wherein the entire surface of one core iron oxide particle is coated with the shell silicon oxide.

7 . The composition for a laminated coating film according to claim 1 , wherein said silicon oxide-coated iron oxide particles are the particles wherein at least a part of the surface of the aggregates of a plurality of iron oxide particles is coated with silicon oxide, and
wherein the diameter of said aggregates is 50 nm or less, and the diameter of said silicon oxide-coated iron oxide particles is 100.5% or more and 190% or less relative to the diameter of said aggregates.

8 . The composition for a laminated coating film according to claim 1 , comprising a perylene pigment.

Assignees

• M Technique Co Ltd

Inventors

• Enomura Masakazu
• Honda Daisuke

Classifications

• C09C3/063

  Coating · CPC title

• C01P2002/82

  by IR- or Raman-data · CPC title

• C09D7/67

  Particle size smaller than 100 nm · CPC title

• C09C2200/407

  Organosilicon materials, e.g. silanes, silicones · CPC title

• C09D5/004

  Reflecting paints; Signal paints · CPC title