Water-based autoxidisable coating composition
US5264482A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 7, 1991 |
| Grant date | Nov 23, 1993 |
| Priority date | — |
| Expiry date | Oct 7, 2011 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08F2810/30
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A water-based autoxidizable coating composition, especially a gloss or partial gloss coating composition (e.g. paint, varnish, woodstain or timber preservative) suitable for application at ambient temperatures which comprises water, preferably organic cosolvent and a partially esterified carboxylic acid film-forming copolymer at least partially neutralized by monovalent cations wherein the copolymer contains added 3-allyloxy-2-hydroxypropyl groups or certain analogues derived from addition of allyl glycidyl ether or certain of its analogues to carboxylic acid groups, in a copolymeric backbone portion derivable from a prepolymer of weight average molecular weight less than 30 000. The partially esterified copolymer has an acid value of 25 to 60 and preferably a dynamic solution viscosity of 1 to 500 Pa.sec measured in 1-methoxy-2-hydroxy propane by oscillatory parallel plate rheometer. The coatings lap well, dry quickly and achieve acceptable water resistance. Also the optionally unneutralized copolymer and the coating composition when containing a minor amount of particulate copolymer which is found to improve gloss. Discoloration on ageing may be improved by neutralizing with Grou…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.