Heat-curable aqueous coating compositions
US4309260A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Nov 10, 1980 |
| Grant date | Jan 5, 1982 |
| Priority date | — |
| Expiry date | Nov 10, 2000 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S524/901
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A binder for a heat-curable aqueous coating composition for metallic surfaces comprises: (A) 60-95% by weight of a water-soluble and/or water-dispersible addition compound of 10-35% by weight of one or more .alpha.,.beta.-unsaturated dicarboxylic acids and 65-90% by weight of a butadiene polymer which is liquid at 20.degree. C., contains at least 50 mole % of butadiene units and has a molecular weight of 500 to 6,000, the addition compound being at least partially neutralized with a basic compound and partially esterified, and (B) 5-40% by weight of a water-soluble and/or water-dispersible crosslinking resin having, on the average, at least 2 chemically different reactive groups per mole, wherein the addition compound (A) is esterified to 10-70 equivalent percent, based on its acid number, with one or more unsaturated alcohols of the formula ##STR1## and wherein at least one of the reactive groups of the crosslinking resin (B) is of formula II ##STR2## wherein, for both formulae I and II, R.sup.1, R.sup.2 and R.sup.3 can be identical or different and each independently is hydrogen or methyl, R.sup.4 is hydrogen or C.sub.1-5 -alkyl, and n is 0 or 1.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.