Dispersants
US7348367B2 · kind B2 · utility
5Cited by
3References
22Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 4, 2001 |
| Grant date | Mar 25, 2008 |
| Priority date | — |
| Expiry date | Feb 14, 2022 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09K23/18
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
Basic and acid dispersants derived from branched alkyl aliphatic acids and alcohols and one or more hydroxy carboxylic acid or lactone to give a polyoxyalkylenecarbonyl chain (POAC) having a terminal carboxylic acid group (TPOAC acid) or terminal hydroxy group (TPOAC alcohol). Preferred basic dispersants are obtained by reaching one or more TPOAC acids with a polyamine or polyimine such as polyethyleneimine and preferred anionic dispersants are prepared by forming a phosphate ester of a TPOAC alcohol.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.