Polymeric pigment dispersant having an acrylic backbone, polyester side chains, cyclic imide groups and quaternary ammonium groups
US6037414A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 2, 1998 |
| Grant date | Mar 14, 2000 |
| Priority date | — |
| Expiry date | Sep 2, 2018 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC01P2006/22
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A polymeric pigment dispersant of a graft polymer having an acrylic polymer backbone and pending from the backbone, polyester side chains, cyclic imide groups and quaternary ammonium groups and the polymer having a calculated number average molecular weight of 8,000-50,000; wherein the graft copolymer is composed of PA1 (a) 10-50%, by weight of the of the graft polymer, of an acrylic copolymer backbone having a number average molecular weight of 2500-10,000 which, before reaction, contains 25-75% by weight of polymerized oxirane containing monomers; PA1 (b) 20-85%, by weight of the graft polymer, of a polyester copolymer, or mixture of different polyester copolymers, having a number average molecular weight of 500-10,000 which polyester copolymer is carboxylic-acid functional and is attached to the backbone by a reaction of the carboxylic acid functional group with oxirane group of the backbone; PA1 (c) 1-16%, by weight of the graft polymer, of cyclic imide groups attached to the backbone by a reaction of the imide group with the oxirane group of the backbone and PA1 (d) 0.2-17%, by weight of the graft polymer, of quaternary ammonium groups.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.