Process for preparing a stable aqueous dispersion of polyamide-imide which is free of carcinogenic, mutagenic or reprotoxic substances, and application to coatings
US10017665B2 · kind B2 · utility
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22Claims
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Key dates
| Filing date | Sep 11, 2013 |
| Grant date | Jul 10, 2018 |
| Priority date | — |
| Expiry date | Jul 13, 2034 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08J2379/08
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
The invention concerns a process for preparing an aqueous polyamide-imide dispersion, characterized in that it comprises at least one step of selecting a polyamide-imide powder and a step of producing a dispersion comprising the polyamide-imide powder, a polar aprotic solvent with a boiling point of more than 180° C. at 760 mm Hg, and water. The invention also concerns a process for producing a dry polyamide-imide film on a substrate.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.