Silicone polyester polymers as delivery systems
US5210133A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jun 15, 1992 |
| Grant date | May 11, 1993 |
| Priority date | — |
| Expiry date | Jun 15, 2012 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G63/6954
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
The invention discloses novel series of silicone polyesters which are useful as delivery systems for a variety of hydroxyl containing active such as lanolin, cholesterol, dihydrocholesterol, Vitamin A, Vitamin D-2, Vitamin D-3, Vitamin D-4, Vitamin E, and Panthenol. Compounds of the invention by are prepared by the esterification of (a) a hydroxyl containing silicone compound selected from silanol and dimethicone copolyol (b) a diacid and (c) a hydroxyl functional active selected from lanolin, cholesterol, dihydrocholesterol, Vitamin A, Vitamin D-2, Vitamin D-3, Vitamin D-4, Vitamin E, and Panthenol; and optionally (d) a mono functional fatty acid. The polyesters of the present invention allow for the formulation of personal care products in which the "active" can be formulated into a variety of solvents without the loss of activity.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.