Copper containing infrared reflective pigment compositions

Patent metadata

Field	Value
Publication number	US-9238735-B2
Application number	US-201214110926-A
Country	US
Kind code	B2
Filing date	May 9, 2012
Priority date	May 10, 2011
Publication date	Jan 19, 2016
Grant date	Jan 19, 2016

Abstract

Pigment compositions are described that advantageously increase total solar reflectance. Also described are methods of making pigment compositions. The pigment compositions can contain copper oxide; copper antimony oxides, copper bismuth oxides, or combinations thereof; and alkaline earth metal oxides, early-transition metal oxides, post-transition metal oxides, metalloid (semi-metal) oxides, rare-earth metal oxides, or combinations thereof.

First claim

What is claimed is:

1. A colored pigment composition comprising a mixed metal oxide pigment having a crystal structure that includes two or more types of metal atoms and oxygen atoms, and is of the formula:
CuO.(A) x .(B) y ,
where x=0.01-2; y=0.01-2; A is antimony oxides, bismuth oxides, or combinations thereof; B is oxides of Mg, Ca, Sr, Ba, Ti, Zr, Zn, Al, Si, B, Ce, or combinations thereof wherein the pigment composition exhibits an average reflection of about 20% or less for light having a wavelength between 380 nm and 780 nm, and the pigment composition exhibits an average reflection of about 20% or more for light having a wavelength between 780 nm and 2500 nm and wherein the pigment composition is in a powder form having an average particle size of about 0.2 μm or more and about 15 μm or less.

2. The pigment composition of claim 1 , wherein A is Sb 2 O 3 , Sb 2 O 5 , Bi 2 O 3 , or combinations thereof.

3. The pigment composition of claim 1 , wherein B is MgO, CaO, SrO, TiO 2 , ZrO 2 , ZnO, SiO 2 , B 2 O 3 , CeO 2 , or combinations thereof.

4. The pigment composition of claim 1 , wherein the pigment composition exhibits an average reflection of about 30% or more for light having a wavelength between 1,300 and 1,600 nm.

5. The pigment composition of claim 1 , wherein the oxides of Mg, Ca, Sr, Ba, Ti, Zr, Zn, Al, Si, B, Ce, or combinations thereof contain metal cations comprising a valence shell with only empty (d 0 ), full-filled d-orbitals (d 10 ), or no d-orbital electrons.

6. The pigment composition of claim 1 , wherein the pigment composition exhibits a total solar reflectance of about 15% of more.

Assignees

• Wang Lei
• Ferro Corp

Inventors

• Wang Lei

Classifications

• C01P2004/80

  Particles consisting of a mixture of two or more inorganic phases · CPC title

• C01G25/006

  Compounds containing zirconium, with or without oxygen or hydrogen, and containing two or more other elements · CPC title

• Y10T428/2982

  Particulate matter [e.g., sphere, flake, etc.] · CPC title

• C01G9/006

  Compounds containing zinc, with or without oxygen or hydrogen, and containing two or more other elements · CPC title

• C01G23/003 Primary

  Titanates (C01G23/001 takes precedence) · CPC title