Polypropylene block copolymers and containers made therefrom
US6159567A · kind A · utility
5Cited by
4References
9Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 17, 1998 |
| Grant date | Dec 12, 2000 |
| Priority date | — |
| Expiry date | Feb 17, 2018 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31938
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A propylene block copolymer comprising PA1 (A) 60-90 weight %, based on the total amount of the block copolymer, of a first block of a propylene polymer, optionally containing a small amount of copolymerised ethylene, PA1 (B) 40-10 weight %, based on the total amount of the block copolymer, of a second block of an ethylene-propylene copolymer containing 1-10 weight % of ethylene, and the total ethylene content of the block copolymer being within the range of 0.1-2.5%. The weight process for the manufacturing of the propylene block copolymer and use of it for the manufacture of bioriented bottles.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.