Bio-based epoxy coating compositions and methods of preparation thereof
US12252580B2 · kind B2 · utility
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19Claims
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Key dates
| Filing date | Sep 6, 2022 |
| Grant date | Mar 18, 2025 |
| Priority date | — |
| Expiry date | Mar 19, 2043 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08K2201/019
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
The disclosure relates to epoxy-based compositions comprising a decarboxylated rosin acid (DCR) component, suitable as an efficient plasticizer. It further improves hardness, elasticity, UV exposure viability properties of the paint and coating compositions. The DCR increases the bio-based renewable material content of a coating formulation and provide solutions for phthalate-free products. The DCR has a density of 0.9 to 1.0 g/cm3, a flash point of 135 to 175° C., an acid value of <50 mg KOH/g, measured according to ASTM D465, and a viscosity of 15 to 60 cSt at 40° C., measured according to ASTM D-445.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.