Thermosplastic vulcanizates from blends of a polypropylene and elastic .alpha.-olefin/cyclic olefin copolymers
US6121383A · kind A · utility
21Cited by
12References
13Claims
0Family size
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Key dates
| Filing date | Apr 20, 1998 |
| Grant date | Sep 19, 2000 |
| Priority date | — |
| Expiry date | Apr 20, 2018 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08L2314/06
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Thermoplastic vulcanizate blends are prepared from a semi-crystalline polymer and a rubbery copolymer derived from copolymerizing at least one alpha-olefin monomer and at least one cyclic olefin copolymer. The rubbery copolymer also includes repeat units from at least one polyene monomer. The polyene monomer provides residual unsaturation for crosslinking of said rubbery copolymer. Crosslinking the rubbery copolymer of the blend generally reduces tension set, compression set and oil swell in aliphatic solvents. The cyclic olefin monomer reduces oil swell in aliphatic oils.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.