Pigment dispersions containing dispersants having pendent hydrophobic polymeric segments prepared by controlled radical polymerization
US6306209A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 16, 1999 |
| Grant date | Oct 23, 2001 |
| Priority date | — |
| Expiry date | Dec 16, 2019 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08F2438/01
- WIPO fieldMacromolecular chemistry, polymers
- 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 polymerizing (i) at least one prepolymer having a radically polymerizable group, and (ii) at least one second monomer. The prepolymer is prepared by controlled radical polymerization, e.g., atom transfer radical polymerization, of at least one radically polymerizable first monomer. The second monomer forms a polymeric backbone segment of the pigment dispersant, and the prepolymer forms polymeric segments that are pendent to the backbone. The backbone segment of the pigment dispersant is hydrophilic, while at least a portion of each pendent polymeric segment is hydrophobic.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.