PIGMENT SPACING

• US 20100218702A1
• Filed: 05/11/2010
• Published: 09/02/2010
• Est. Priority Date: 08/09/2004
• Status: Active Grant

• Current Assignee: BEHR Process Corporation (Masco Corporation)
• Original Assignee: BEHR Process Corporation (Masco Corporation)
• Inventors: Tarng, Ming-Ren, Friedman, Shaune, Chu, Kim, Steffenhagen, Mark
• Granted Patent: US 8,163,078 B2
• Time in Patent Office: Days
• US Class Current: 106/428
• CPC Class Codes: B82Y 30/00 Nanotechnology for materials or surface science, e.g. nanocomposites
• CPC Class Codes: C01P 2004/32 Spheres
• CPC Class Codes: C01P 2004/50 Agglomerated particles
• CPC Class Codes: C01P 2004/64 Nanometer sized, i.e. from 1-100 nanometer
• CPC Class Codes: C01P 2004/80 Particles consisting of a mixture of two or more inorganic phases
• CPC Class Codes: C01P 2004/82 two phases having the same anion, e.g. both oxidic phases
• CPC Class Codes: C08K 3/22 of metals
• CPC Class Codes: C09C 1/0084 containing titanium dioxide
• CPC Class Codes: C09C 1/3653 Treatment with inorganic compounds
• CPC Class Codes: C09D 17/008 Titanium dioxide
• CPC Class Codes: C09D 7/45 Anti-settling agents
• CPC Class Codes: C09D 7/61 inorganic
• CPC Class Codes: Y10T 428/25 Web or sheet containing structurally defined element or component and including a second component containing structurally defined particles
• CPC Class Codes: Y10T 428/256 Heavy metal or aluminum or compound thereof
• CPC Class Codes: Y10T 428/257 Iron oxide or aluminum oxide
• CPC Class Codes: Y10T 428/258 Alkali metal or alkaline earth metal or compound thereof
• CPC Class Codes: Y10T 428/29 Coated or structually defined flake, particle, cell, strand, strand portion, rod, filament, macroscopic fiber or mass thereof
• CPC Class Codes: Y10T 428/2991 Coated
• CPC Class Codes: Y10T 428/31855 Of addition polymer from unsaturated monomers

Abstract

An improved pigment spacing composition and method of manufacture. A coating composition wherein the pigment particles are spaced more uniformly resulting in improved coating properties. In another embodiment, the present invention relates to a composition having nanoparticles interacting with pigmentary titanium dioxide to provide for more uniform spacing of the titanium dioxide.

Claims

1. A process for modifying a paint composition containing titanium dioxide particles, comprising:

dispersing between a 0.05 percent and a 5.0 percent by weight of a nanoparticle metal oxide pigment, pre-treated to minimize flocculation, in the paint composition the titanium dioxide particles; and

interacting the nanoparticle pigment and the titanium dioxide particles to form an intervening dispersion of a plurality of nanoparticle pigment substantially uniformly distributed around the titanium dioxide particles.

2. The process of claim 1, wherein the nanoparticle mixed oxide pigment comprises zinc oxide.

3. The process of claim 1, wherein the titanium dioxide particles comprise between about 7.1 and about 28.5 percent by weight of the coating composition.

4. The process of claim 1, wherein the step of dispersing a nanoparticle metal oxide pigment comprises mixing a first nanoparticle metal oxide pigment having a first average particle size and a second nanoparticle metal oxide pigment having a second average particle size, the first nanoparticle metal oxide pigment and the second nanoparticle metal oxide pigment having pre-treated surfaces to minimize flocculation.

5. The process of claim 4, wherein the first average particle size is about 120 nm and the second average particle size is about 60 nm.

6. The process of claim 4, wherein the first average particle size is about 120 nm and the second average particle size is about 50 nm.

7. A process for modifying a paint composition containing titanium dioxide particles, comprising:

dispersing in the paint composition a first nanoparticle metal oxide pigment having a first average particle size, a second nanoparticle metal oxide pigment having a second average particle size, the first nanoparticle metal oxide pigment and the second nanoparticle metal oxide pigment having pre-treated surfaces to minimize flocculation;

interacting the first nanoparticle metal oxide pigment and the second nanoparticle metal oxide pigment with the titanium dioxide particles to form an intervening dispersion of a plurality of particles of the first nanoparticle metal oxide pigment and the second nanoparticle metal oxide pigment substantially uniformly distributed around substantially each of the titanium dioxide particles.

8. The process of claim 7, wherein the first average particle size is about 120 nm and the second average particle size is about 60 nm.

9. The process of claim 7, wherein the first average particle size is about 120 nm and the second average particle size is about 50 nm.

10. The process of claim 7, wherein the first metal oxide pigment and the second metal oxide pigment comprise the same metal oxide.

11. The process of claim 7, wherein the first metal oxide pigment and the second metal oxide pigment are different metal oxides.

12. The process of claim 7, wherein the titanium dioxide particles comprises between about 7.1 and about 28.5 percent by weight of the coating composition,