Pigment dispersions containing dispersants prepared by controlled radical polymerization having hydrophilic and hydrophobic segments
US6462125B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 16, 1999 |
| Grant date | Oct 8, 2002 |
| Priority date | — |
| Expiry date | Dec 16, 2019 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09B67/009
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A pigment dispersion that includes a pigment, an aqueous carrier, and a pigment dispersant. The pigment dispersant is prepared by atom transfer radical polymerization initiated and has the polymer chain structure:&phgr;—(G)p—(E)a—Twhere G is a residue of at least One ethylenically unsaturated monomer; E is a hydrophilic residue of at least one ethylenically unsaturated monomer; &phgr; is a hydrophobic residue of or derived from an initiator; T is or is derived from a radically transferable group from the initiator, p and s represent average numbers of residues occurring in a block of residues; p and s are each individually selected such that said pigment dispersant has a number average molecular weight of at least 250.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.