Composition comprising silicone oil or oils structured with compolymers carrying greater than 70% long chain alkyl group
US8372820B2 · kind B2 · utility
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16References
12Claims
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Key dates
| Filing date | Apr 15, 2009 |
| Grant date | Feb 12, 2013 |
| Priority date | — |
| Expiry date | Aug 6, 2030 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61Q19/04
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
The present invention discloses silicone oils which are structured with a copolymer comprising a large percentage of alkane groups. Using high percentage pendant alkane helps provide silicone with ideal gel properties (G′>G″, particularly >1000 cP, more preferably 2000-30,000 cP) and viscosity, after fracture, of 10 to 1000 cP, preferably 30-500 cP MW of polymer and exact chain length are selected to ensure that, when forming gel upon cooling after mixing polymer and silicone, the polymer viscosity will not be so high upon crystal formation that gel cannot form, yet also will not be so low that polymer will phase separate.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.