Flexible polypropylene roofing membrane

Details Flexible polypropylene roofing membrane Flexible polypropylene roofing membrane

C - Chemistry, Metallurgy

08

L

C08L 23/14 (2006.01) E04D 5/00 (2006.01)

Patent

CA 2578414

A thermoplastic polyolefin (TPO) roofing membrane is made by blending a new polypropylene based elastomer (PBE) or plastomer (PBP) and polyolefin copolymers. The new PBE or PBP offers superior flexibility over conventional polypropylene roofing membranes for easy installation. The new narrow molecular weight distribution and broad crystallinity distribution of the PBE or PBP results in excellent heat welding strength and wide heat welding windows of the said TPO membrane.

L'invention concerne une membrane de couverture en polyoléfine thermoplastique (TPO) qu'on obtient en mélangeant un nouvel élastomère (PBE) ou plastomère (PBP) à base de polypropylène et des copolymères de polyoléfine. Le nouveau PBE ou PBP présente une flexibilité supérieure par rapport aux membranes de couverture classiques en polypropylène, qui facilite sa mise en place. La nouvelle distribution étroite des masses moléculaires et la large distribution de la cristallinité du PBE ou du PBP confèrent à ladite membrane TPO une excellente résistance au thermosoudage et de larges fenêtres de thermosoudage.

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