Dispersants
US6197877A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 30, 1999 |
| Grant date | Mar 6, 2001 |
| Priority date | — |
| Expiry date | Apr 30, 2019 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09K23/18
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A dispersant of general Formula I EQU T--(A).sub.n (B).sub.p --Z (1) wherein PA1 T is hydrogen or a polymerisation terminating group; PA1 Z is an acidic or basic group or a moiety containing either an acidic or basic group; PA1 A and B are each, independently, oxyalkylene carbonyl groups derivable from .delta.-valerolactone, .epsilon.-caprolactone or alkyl substituted .epsilon.-caprolactone provided that both are not .epsilon.-caprolactone or .delta.-valerolactone; PA1 n and p are integers; and PA1 n+p is from 2 to 100; including salts thereof. Specific examples of dispersants are the reaction product of lauric acid, .delta.-caprolactone, 7-methyl-.epsilon.-caprolactone with PEI, the reaction product of lauric acid, .epsilon.-caprolactone, .delta.-valerolactone with PEI and the phosphate of the reaction product of dodecanol, .epsilon.-caprolactone and .delta.-valerolactone.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.