Production of polyamide powders by ester aminolysis
US11066528B2 · kind B2 · utility
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Key dates
| Filing date | Dec 22, 2015 |
| Grant date | Jul 20, 2021 |
| Priority date | — |
| Expiry date | Feb 17, 2036 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08J2377/06
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
A method for producing a polycondensate powder dispersion, characterised in that it includes at least one step of polycondensation: i) of at least one diester and at least one diamine, and/or ii) at least one amino ester, while stirring, in a solvent that can solubilise both the diamine and the diester and/or the amino ester but not the polyamide that forms during the polycondensation, at a temperature between 30° C. and the boiling temperature of the solvent, in order to produce a powder precipitate dispersed in the solvent.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.