Pigment dispersions containing dispersants prepared by controlled radical polymerization
US6326420A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 16, 1999 |
| Grant date | Dec 4, 2001 |
| Priority date | — |
| Expiry date | Dec 16, 2019 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09D17/001
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A pigment dispersion which includes a pigment, an aqueous carrier and a pigment dispersant. The pigment dispersant is prepared by controlled radical polymerization initiated in the presence of a monomeric initiator having at least two radically transferable groups. The pigment dispersant has at least one of the following polymer chain structures: EQU .phi.-[(G).sub.p --(E).sub.s --T].sub.z and EQU .phi.-[(E).sub.3 --(G).sub.p --T].sub.z where G is a hydrophobic residue of at least one radically polymerizable ethylenically unsaturated monomer; E is a hydrophilic residue of at least one radically polymerizable ethylenically unsaturated monomer; .phi. is a residue of or derived from the initiator, and is free of the radically transferable group; T is or is derived from the radically transferable group of the initiator; z is 2 to 10; p and s are at least one and are selected such that the pigment dispersant has a number average molecular weight of at least 500.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.