Aqueous crosslinkable coating compositions
US6395827B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 22, 1999 |
| Grant date | May 28, 2002 |
| Priority date | — |
| Expiry date | Nov 22, 2019 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G18/6254
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
An aqueous crosslinkable coating composition suitable for the provision of thick coatings without incurring carbon dioxide bubble formation comprising:(A) an aqueous dispersion of at least one hydroxyl- and acid-functional vinyl polymer having a hydroxyl value of 8 to 250 mg KOH/g of polymer and an acid value of 2 to 55 mg KOH/g of polymer, where the contribution of at least 30% of the acid value results from a monocarboxylic acid(s) of formula:CH2—CR1—Q—CO2H  (1)where R1 is H or lower alkyl of 1 to 5 carbon atoms and Q is a spacer group of formula:[—C(═O)—X—(CH2)m—]k  (2)where X is —O— or —NH—, m is at least 1, preferably 2 or 3, and k is at least 1, preferably 2, 3, 4 or 5; and(B) at least one organic polyisocyanate. The acid of formula (1) preferably comprises &bgr;-carboxyethyl acrylate.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.