Transparent thermoplastic blend of a cycloolefin copolymer and a thermoplastic polyurethane
US7816450B2 · kind B2 · utility
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15References
17Claims
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Key dates
| Filing date | Jan 29, 2009 |
| Grant date | Oct 19, 2010 |
| Priority date | — |
| Expiry date | Jan 29, 2029 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08L75/08
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A blend of a cycloolefin copolymer and a thermoplastic urethane having similar indices of refraction is transparent. The cycloolefin copolymer is derived from norbornene and other monomers such that it has a processing range compatible with the thermoplastic urethane. The urethane component preferably has a polyether intermediate. A thermoplastic urethane compatibilizing agent is utilized desirably having a hydrocarbon intermediate portion. The compositions can be made to have desirable electrical dissipative properties for static control applications.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.