Aqueous coating compositions
US6204319A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 30, 1998 |
| Grant date | Mar 20, 2001 |
| Priority date | — |
| Expiry date | Oct 30, 2018 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08J2353/00
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
An aqueous coating composition containing: PA0 (a) an aqueous carrier medium: PA0 (b) a pigment having a pH below 7.0; PA0 (c) an AB block copolymer pigment dispersant resin of PA1 (1) an A block of a hydrophobic polymer having amine groups; and PA1 (2) a B block of a hydrophilic polymer having hydroxyl groups and carboxyl groups; PA0 the AB block copolymer has a number average molecular weight of 5,000-20,000 and contains 20-80% by weight of a polymeric A segment and correspondingly 80-20% by weight of a polymeric B segment; PA0 wherein the pigment and the dispersant are present in a pigment to dispersant weight ratio of 0.1/1-20/1; PA0 (d) a film forming polymeric binder containing carboxyl groups and PA0 (e) a crosslinking agent which on curing of the coating composition will react with the carboxyl and hydroxyl groups of the AB block copolymer and the carboxyl groups of the film forming polymeric binder. Pigment dispersions of the AB block copolymer and process for forming the dispersions also are part of this invention.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.