Aqueous coating composition based on specific two-component polyurethanes and to a process for its production
US5075370A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 18, 1989 |
| Grant date | Dec 24, 1991 |
| Priority date | — |
| Expiry date | Aug 18, 2009 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G18/6287
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
The present invention is directed to a two-component coating composition which contains as binder components PA0 a) a polyol component containing at least one hydroxyl-containing polymer having chemically incorporated carboxylate and/or sulfonate groups and based on olefinically unsaturated compounds and PA0 b) a polyisocyanate component having a viscosity at 23.degree. C. of about 50 to 10,000 mPa.s and based on at least one organic polyisocyanate in quantities corresponding to an NCO/OH equivalent ratio of about 0.5:1 to 5:1, characterized in that component a) is an aqueous solution and/or dispersion of a polymer containing hydroxyl groups in which the polyisocyanate component b) is present in emulsified form. The present invention also relates to a process for the production of this coating composition which is characterized in that a polyisocyanate component having a viscosity at 23.degree. C. of about 50 to 10,000 mPa.s and based on at least one organic polyisocyanate is emulsified in an aqueous solution or dispersion of one or more polymer resins containing hydroxyl groups and chemically incorporated sulfonate and/or carboxylate groups in a quantity which makes them soluble a…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.