Polypropylene resin compositions
US4927885A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 5, 1988 |
| Grant date | May 22, 1990 |
| Priority date | — |
| Expiry date | Oct 5, 2008 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08L57/02
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Polypropylene resin compositions suitable for producing polypropylene films with excellent properties are disclosed. The compositions can provide polypropylene films having very excellent transparency, excellent heat-sealability and good anti-blocking property. Such characteristics are essential requirements for packing films. The polypropylene resin compositions comprise 70 to 99 parts by weight of polypropylene and 1 to 30 parts by weight of a specific hydrogenated petroleum resin. The hydrogenated petroleum resin can easily be prepared industrially from valueless by-products of oil and petrochemical industries, such as C.sub.5 fraction and C.sub.9 fraction by-produced in naphtha steam cracking process.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.