Preparation method for salt-spray-resistant polyaspartate, salt-spray-resistant polyaspartate, and coating
US12054633B2 · kind B2 · utility
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Key dates
| Filing date | Dec 27, 2023 |
| Grant date | Aug 6, 2024 |
| Priority date | — |
| Expiry date | Dec 27, 2043 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09D5/08
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A preparation method for a salt-spray-resistant polyaspartic acid ester includes mixing polyaspartic acid ester, cardanol resin and a catalyst together for transesterification reaction, and controlling a temperature at 100-130° C. and a relative vacuum degree at −0.095 MPa-−0.1 MPa, and stirring for reaction for 2-5 h to obtain the salt-spray-resistant polyaspartic acid ester; in particular, a molar ratio of the polyaspartic acid ester to the cardanol resin to the catalyst is polyaspartic acid ester:the cardanol resin:the catalyst=1:0.1-0.3:0.001-0.003, and the catalyst is tetraisopropyl titanate or dibutyltin oxide.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.