Polymethylpentene/polypropylene blend and film
US5534593A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | May 23, 1995 |
| Grant date | Jul 9, 1996 |
| Priority date | — |
| Expiry date | May 23, 2015 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08J2323/20
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
The present invention provides a composition comprising a blend of: (A) from about 90% to about 10% by weight of polymethylpentene, wherein the polymethylpentene has a molecular weight between from about 200,000 to about 700,000, and a melt flow rate between from about 20 grams/10 minutes to about 200 grams/10 minutes; (B) from about 10% to about 90% by weight of polypropylene, wherein the polypropylene has a molecular weight between from about 150,000 to about 350,000, and a melt flow rate between from about 1 gram/10 minutes to about 10 grams/10 minutes; whereby the blend of (A) and (B) has improved elongation and improved release properties. The invention further provides a blend with improved tensile strength, improved elongation, and improved release properties, and a method of producing a article with improved release properties from the blend.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.