Stabilized ascorbic acid, composition, and method of use
US6103267A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 27, 1998 |
| Grant date | Aug 15, 2000 |
| Priority date | — |
| Expiry date | Jul 27, 2018 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61K47/10
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
A dispersion for carrying at least one water-soluble material or water-dispersible material (especially ascorbic acid, Vitamin C) in a relatively stable form is described, the dispersion comprising an oil phase containing particles comprising water-soluble polymer, water-soluble material or water-dispersible material (ascorbic acid), and water. The dispersion preferably comprises particles which have number average diameter dimensions of less than 2 microns, more preferably less than 1 micron. The dispersion may comprise oil components such as, for example only, a mineral oil, silicone oil, or cosmetic oil. A method of forming a dispersion of solid particles which comprise water-soluble material or water-dispersible material (e.g., ascorbic acid) in a water-soluble polymer may comprise the steps of: PA1 a) forming a first solution of the water-soluble material or water-dispersible material (ascorbic acid), water and a water-soluble polymer, PA1 b) mixing the first solution with a second solution of a water in a surface active agent having an HLB of less than 12 or less than 10 and oil, PA1 c) dispersing the first solution and the second solution to form a mixture of the first solut…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.