Process for mixing modified bitumen by extrusion

US7967905B2 · kind B2 · utility

Assignee

• Johns Manville · US

Inventors

• Raymond C. Swann · Kansas City, US
• Klaus Friedrich Gleich · Nuremberg, DE
• Walter A. Johnson · Towanda, US
• Michael John Block · Centennial, US
• John VanNice · Lenexa, US

Key dates

• Filing date: Dec 5, 2007
• Grant date: Jun 28, 2011
• Expiry date: Feb 17, 2029

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08L95/00
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

Provided is a method of mixing a modified bitumen composition and feeding one or more polymeric materials to an extruder, together with asphalt fed at more than one location along a length of the extruder. Improved mixing and elimination of asphalt melting in the production of rolled goods and other products is improved.