Tannic acid curing agent and preparation method and application thereof
US11447458B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 29, 2021 |
| Grant date | Sep 20, 2022 |
| Priority date | — |
| Expiry date | May 23, 2041 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G59/621
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
A tannic acid curing agent and a preparation method thereof are provided. The present invention uses tannic acid as a raw material and the long fatty chain of 10-undecenoyl chloride is introduced into the tannic acid structure to obtain the tannic acid curing agent. The preparation method includes the following steps: mixing tannic acid, 10-undecenoyl chloride, a catalyst and a solvent for a substitution reaction to obtain undecylenyl tannic acid, in which the catalyst includes an acid binding agent and 4-diaminopyridine, and the solvent includes ethyl acetate and N,N-dimethylformamide; mixing the undecylenyl tannic acid, a mercapto compound, a solvent and a photoinitiator for an addition reaction under an ultraviolet irradiation to obtain the tannic acid curing agent, in which the mercapto compound is a mercapto carboxylic acid compound or a mercapto alcohol compound.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.