Pigment dispersants formed by reacting an isocyanate with a poly (ethylene glycol) alkyl ether, a polyester or polyester or polyacrylate and a diamine
US6506899B1 · kind B1 · utility
11Cited by
20References
14Claims
0Family size
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Inventor
Key dates
| Filing date | Aug 9, 1999 |
| Grant date | Jan 14, 2003 |
| Priority date | — |
| Expiry date | Aug 9, 2019 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC02F2103/14
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
Pigment dispersants prepared by reacting an isocyanate oligomer having an average functionality of at least three with a polyester or polyacrylate, a poly(ethylene glycol)alkyl ether, and a diamine having a primary amine and a tertiary amine have excellent stabilizing properties and offer a wide formulation latitude with a variety of solvent systems, including polar solvents and water, and are particularly useful as pigment dispersants for paints and coating applications.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.