Production of TPO roofing membrane via counter-rotating extrusion

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United States of America Patent

PATENT NO 9987786
SERIAL NO

14649749

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Abstract

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The present disclosure is directed to a process for producing thermoplastic polyolefin roofing membrane. The process includes directly adding components of a high-load flame retardant TPO formulation to a counter-rotating twin screw extruder. The process includes extruding the formulation with counter-rotation of the twin screws and forming a TPO roofing membrane having a tensile strength of greater than 10 MPa and a flame retardance of rating of classification D as measured in accordance with EN ISO 1 1925-2, surface exposure test.

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Patent Owner(s)

  • DOW GLOBAL TECHNOLOGIES LLC

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Stoiljkovic, Aleksandar Waedenswill, CH 16 59
Ultsch, Stefan Staefa, CH 15 79
Wu, Xiaosong Sugarland, US 64 656

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