Patent · US Expired

Extrusion compositions with improved melt flow

US6326434A · kind A · utility

6Cited by

8References

20Claims

0Family size

Assignee

Equistar Chemicals, LP · US

Inventors

Chun D. Lee · Cincinnati, US
Ramesh N. Shroff · Cincinnati, US
Jeffrey A. Jones · Ann Arbor, US

Key dates

Filing date	Feb 16, 2000
Grant date	Dec 4, 2001
Priority date	—
Expiry date	Feb 16, 2020

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC08L2308/00
WIPO fieldMacromolecular chemistry, polymers
WIPO sectorChemistry

Abstract

Extrusion compositions having improved melt stability and suitable for use in high-speed extrusion coating operations are disclosed. The compositions are a dynamically modified mixture of a first polymeric component which is a reactor-made or physically blended mixture of polypropylene and an ethylene-propylene copolymer, a second polymeric component which is a fractional melt index homopolymer or copolymer of ethylene and an organic peroxide.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.