Low VOC and APE free universal paint colourant compositions
US9080030B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 9, 2010 |
| Grant date | Jul 14, 2015 |
| Priority date | — |
| Expiry date | Sep 9, 2030 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09D7/45
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
The present invention relates to a universal colorant composition that is essentially free of volatile organic compounds (VOCs) and alkyl phenol ethoxylates (APEs). The present invention comprises a dispersing vehicle that comprises a low molecular weight carbamide compound, a C3-C5 polyalcohol, a polyethylene glycol, and optionally water. The dispersing vehicle provides excellent humectant and dispersing properties. The colorant composition comprising the dispersing vehicle maintains its stability and functionality following extended exposure to the atmosphere and/or temperature extremes. The present invention provides a colorant composition that is universally compatible with a wide variety of aqueous/water-based and organic solvent-based paints and coatings, while exhibiting physical and performance characteristics that are comparable to conventional colorant compositions that contain VOCs and APEs. A process for preparing a universal colorant composition for tinting a wide variety of aqueous/water-based and organic solvent-based paints and coatings is also provided.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.