Semi-polar hyperdispersants for pigment bases
US4882436A · kind A · utility
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4References
8Claims
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Key dates
| Filing date | Apr 13, 1989 |
| Grant date | Nov 21, 1989 |
| Priority date | — |
| Expiry date | Apr 13, 2009 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07D233/14
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Quaternized oligourethanes, useful as dispersing agents in preparing high-solids pigment concentrates for use in manufacturing inks, especially inks intended for use in gravure and packaging applications. The novel oligourethanes are prepared by reacting an appropriate ester or alcohol with a hydroxyethylimidazoline and polyisocyanate followed by quaternization with acids or alkyl derivatives of acids.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.