Pigment dispersions containing dispersants prepared by controlled radical polymerization and having pendent hydrophobic polymeric segments
US6441066B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 16, 1999 |
| Grant date | Aug 27, 2002 |
| Priority date | — |
| Expiry date | Dec 16, 2019 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09D7/45
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A pigment dispersion comprising pigment, an aqueous carrier selected from water and a mixture of water and at least one organic solvent, and a pigment dispersant is described. The pigment dispersant is prepared by controlled radical polymerization, e.g., atom transfer radical polymerization, of a radically polymerizable monomer in the presence of a polymeric initiator having at least one radically transferable group. The polymeric initiator forms the polymeric backbone segment of the pigment dispersant, and the monomer forms polymeric segments that are pendent to the polymeric backbone segment. The pigment dispersant has comb-like architecture in which the polymeric backbone segment is hydrophilic, and at least a portion of each pendent polymeric segment is hydrophobic.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.