Combination of polyion complex particle and non-polymeric acid having two or more acid dissociation constants
US11389379B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 23, 2016 |
| Grant date | Jul 19, 2022 |
| Priority date | — |
| Expiry date | Sep 23, 2036 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61K2800/654
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
The present invention relates to a composition according to the present invention comprises: (a) at least one particle comprising at least one cationic polymer, at least one anionic polymer, and at least one non-polymeric acid having two or more pKa values or salt(s) thereof; and (b) at least one physiologically acceptable volatile medium. The composition according to the present invention is stable, and can have a variety of cosmetic functions. For example, the composition according to the present invention can prepare a film which can have cosmetic effects such as absorbing or adsorbing malodor, changing the appearance of a keratin substrate such as skin, changing the feel to the touch of the keratin substrate, and/or protecting the keratin substrate from, for example, dirt or pollutants.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.