Thermoplastic elastomer based on polynorbornene and polyvinyl chloride
US5312856A · kind A · utility
Inventors
Key dates
| Filing date | Sep 9, 1991 |
| Grant date | May 17, 1994 |
| Priority date | — |
| Expiry date | Sep 9, 2011 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08L65/00
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
This composition comprises a mixture of 20 to 70 parts by weight of polynorbornene, crosslinked or uncrosslinked, 80 to 30 parts by weight of a polymer based on vinyl chloride and of at least one plasticiser customary for polynorbornene and the polymer based on vinyl chloride in an amount sufficient for reducing the glass-transition temperature of polynorbornene down to the range of rubbers. To prepare the thermoplastic composition comprising crosslinked polynorbornene, a mixture of polynorbornene, a polymer based on vinyl chloride, a plasticiser customary for polynorbornene and the polymer based on vinyl chloride and a crosslinking system is kneaded at a temperature sufficiently high and during a period sufficiently long for crosslinking polynorbornene. Applications: Manufacture of flexible tubes, seals for the construction and automobile industries, protective bellows for the automobile industry, injection-moulded articles, such as solid wheels for the toy industry, and the like.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.