Water-dispersible granules comprising a fragrance in a water-soluble or water-dispersible matrix, and process for their preparation
US6624136B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 5, 2002 |
| Grant date | Sep 23, 2003 |
| Priority date | — |
| Expiry date | Dec 5, 2022 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC11D11/0082
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
The invention concerns water dispersible granulates comprising: at least a hydrophobic perfume (P), in the form of droplets, finely divided in and encapsulated by a water soluble or water dispersible solid organic matrix (MO) selected among: polypeptides (PP) of plant or synthetic origin; polyelectrolytes (PE) belonging to the family of weak polyacids; or their mixtures; and at least an emulsifying agent (AE) at the droplet/matrix interface. The invention also concerns a method, in two steps, for preparing said granulates, the first step consisting in preparing an emulsion in water comprising at least a hydrophobic perfume (P), at least an emulsifying agent (AE); and said water soluble or water dispersible organic matrix (MO), the second step consisting in drying said emulsion until a granulate is formed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.