Clear silicone polycarbonate elastomeric copolymers
US8466249B2 · kind B2 · utility
29Cited by
10References
3Claims
0Family size
Assignee
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Key dates
| Filing date | May 13, 2011 |
| Grant date | Jun 18, 2013 |
| Priority date | — |
| Expiry date | May 13, 2031 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/139
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Silicone polycarbonate block copolymers are disclosed that have a high elongation before yield, are clear, and have elastomeric properties. Generally, the silicone blocks are very short (less than about 50 organosiloxane repeat units) and the silicone blocks are substantially isolated from each other by bisphenol carbonate spacers.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.