Patent · US Expired

Modified polypropylenes of improved processability

US6433109B1 · kind B1 · utility

8Cited by

4References

14Claims

0Family size

Assignee

Borealis AG · AT

Inventors

Manfred Raetzsch · Kirchschlag, AT
Hartmut Bucka · Staprijk, AT
Achim Hesse · Dresden, DE
Ulf Panzer · Ansfelden, AT
Norbert Reichelt · Ansfelden, AT

Key dates

Filing date	Nov 16, 2000
Grant date	Aug 13, 2002
Priority date	—
Expiry date	Nov 16, 2020

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10S526/901
WIPO fieldMacromolecular chemistry, polymers
WIPO sectorChemistry

Abstract

Modified polypropylenes of improved processability are produced by a continuous method by absorptively charging polypropylene particles at 20° to 120° C. with a gas mixture, which contains oxygen and bifunctional, unsaturated monomers, and melting the mixture.The modified polypropylenes of improved processability as well as mixtures with unmodified polypropylenes are suitable for the production of films, sheets, fibers, panels, coatings, pipes, hollow objects and foamed materials.

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