Emulsifiers having water-in-oil-stabilizing properties and compositions, uses and methods relating to same
US10195123B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Apr 22, 2015 |
| Grant date | Feb 5, 2019 |
| Priority date | — |
| Expiry date | Apr 22, 2035 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61K2800/52
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
Emulsifiers are provided that are able to stabilize water-in-oil emulsions. The emulsifiers are homogenous and have a relatively low melting point (e.g., soft pastes, gels or liquids at room temperature), enabling their use in cold-process methods/formulations which reduce energy consumption, manufacturing costs, as well as allow the use thermolabile active ingredients. The water-in-oil emulsifiers may comprise: (a) polyglycerol fatty acid esters consisting of saturated and unsaturated fatty acid esters of polyglycerol; (b) polyhydroxystearic acid copolymers consisting of copolymers of hydroxystearic acid with saturated and unsaturated fatty acids; and (c) hydroxystearic acid. Methods and uses relating to the emulsifiers are also described, for example in cosmetic and pharmaceutical compositions.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.