Encapsulation of active ingredients
US6482433B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 29, 2000 |
| Grant date | Nov 19, 2002 |
| Priority date | — |
| Expiry date | Jun 29, 2020 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61P3/02
- WIPO fieldFood chemistry
- WIPO sectorChemistry
Abstract
A process for preparing free-flowing and, during handling, dust-free microparticles. The particles are at least 90% by weight, have a diameter of 100-400 &mgr;m, and contain one or more active ingredients in a glassy matrix. Generally, the process of the invention comprises the steps of (1) preparing an aqueous solution of the matrix materials, (2) mixing the flavor into the aqueous solution with stirring to form an emulsion or suspension, (3) spraying the emulsion in a spray drying tower under a supply of hot air to quickly create a semi-solid skin allowing outtake of moisture (water), and (4) subsequently subjecting the resulting particles to continued drying at lower temperatures in a fluid bed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.