Biodegradable polyesters for water-resistant anhydrous suncare formulations
US12290590B2 · kind B2 · utility
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38Claims
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Key dates
| Filing date | Feb 16, 2021 |
| Grant date | May 6, 2025 |
| Priority date | — |
| Expiry date | Apr 20, 2042 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61K2800/74
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
The present disclosure generally relates to a waterproofing polymer that is a substantially non-sequential reaction product of the following components: (i) at least one polyglycerol; (ii) at least one dimer acid; and (iii) at least one fatty acid having 8-30 carbon atoms, wherein (iii) and (i) are in a molar ratio of less than 2:1. The components are charged to a reaction vessel and subsequently reacted to produce a polyester polymer having excellent waterproofing properties. The polymers impart high static and water-resistant SPF to anhydrous sunscreen formulations.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.