Topical composition of unsaturated monoacid/monoacrylamide/polyfunctional monomer copolymer
US6372204B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 25, 2000 |
| Grant date | Apr 16, 2002 |
| Priority date | — |
| Expiry date | Apr 25, 2020 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61Q17/04
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
A thickener comprises a water-in-oil reverse emulsion and a copolymer having moieties derived (i) from a monounsaturated monocarboxylic acid monomer containing from 3 to 5 carbon atoms, the monocarboxylic acid either being in free form or in the form of an inorganic salt, and (ii) from a monoacrylamide monomer. The copolymer is in solution in the aqueous phase constituting the emulsion, the oil phase of this emulsion consisting of a mixture of at least one volatile oil and at least one non-volatile oil. The weight ratio between the volatile oil and the non-volatile oil is between 90/10 and 10/90. The oil phase represents from 10 to 60% by weight of the whole. Water represents from 30 to 70% by weight of the whole. The copolymer represents from 10 to 30% by weight of the whole and a surfactant represents from 5 to 20% by weight of the whole.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.