Process of rheology modification of polymers

US6552129B2 · kind B2 · utility

Assignee

• DOW GLOBAL TECHNOLOGIES LLC · US

Inventors

• David A. Babb · Lake Jackson, US
• Che-I Kao · Lake Jackson, US
• Wendy Hoenig · Lake Jackson, US
• Michael E. Rowland · Lake Jackson, US
• Clark H. Cummins · Midland, US
• H. Craig Silvis · Midland, US
• Michael J. Mullins · Lake Jackson, US
• Thoi H. Ho · Lake Jackson, US

Key dates

• Filing date: Dec 10, 2001
• Grant date: Apr 22, 2003
• Expiry date: Dec 10, 2021

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T428/31917
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

The invention includes a process of reacting a poly(sulfonyl azide) with a polymer comprising steps (a) forming a first admixture of a first amount of a first polymer or in a liquid which does not require removal from the polymer and a poly(sulfonyl azide); (b) then forming a second admixture of the first admixture with a second amount of at least one second polymer; and (c) heating the second admixture at least to the decomposition temperature of the coupling agent for a time sufficient to result in coupling of polymer chains. The invention further includes all compositions obtainable by processes of the invention as well as blends of those compositions with one or more polymers of compositions different from the first or second polymer or the product of a process of the invention. Additionally the invention includes articles made from compositions of the invention, and shaping those articles particularly by processes which comprise shaping the compositions in a melted state into an article, more preferably when the process comprises thermoforming, injection molding, extrusion, casting, blow molding, foaming or blowing as well as the use of the compositions in those processes.