High tear strength polymers
US4363904A · kind A · utility
45Cited by
8References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 23, 1981 |
| Grant date | Dec 14, 1982 |
| Priority date | — |
| Expiry date | Mar 23, 2001 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/24975
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Heterogeneous ethylene based hydrocarbon copolymers having high tear strength properties in film form, formed from ethylene, C.sub.3-4 monomer and C.sub.5-8 monomer with a molar ratio in the polymer of (C.sub.3-4 /C.sub.2) of about 0.006 to 0.09, a (C.sub.5-8 /C.sub.2) ratio of about 0.003 to 0.07 and having a Chain Branch Factor of about 0.2 to 0.8 and a narrow molecular weight distribution; a gas phase process for making such polymers, and film made from such polymers.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.