Dimethylsiloxane-alkylene oxide copolymers
US11642304B2 · kind B2 · utility
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Key dates
| Filing date | Jul 25, 2019 |
| Grant date | May 9, 2023 |
| Priority date | — |
| Expiry date | Nov 18, 2039 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61K2800/591
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
Copolymers are formed of monomers of poly(dimethylsiloxane) and poly(alkylene oxide) of the following formula: Ax-XCH2CH2—[ByCz]n—X-Ax. In the formula, each X independently represents a —CH2— group or an oxygen atom, A represents a polydimethylsiloxane derivative, B represents a polyethylene glycol unit, C represents a polypropylene glycol unit, x and n independently represent an integer from 1 to 150, and y and z independently represent an integer from 0 to 150. The copolymers can be used as emulsifiers in personal care compositions.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.