Polyolefin thermoplastic roofing membranes with improved burn resistivity
AssigneeHolcim Technology Ltd
InventorsHao WANG, Donna TIPPMANN, Michael J. HUBBARD, Todd TAYKOWSKI, Timothy McQUILLEN
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Abstract
A multi-layered thermoplastic roofing membrane comprising a planar body including at least three layers, said at least three layers including (i) a top layer that includes magnesium hydroxide dispersed within a thermoplastic resin, (ii) an upper middle layer disposed below said top layer and including magnesium hydroxide and calcium carbonate dispersed within a thermoplastic resin, and (iii) a lower layer disposed below said upper middle layer and including magnesium hydroxide and calcium carbonate dispersed within a thermoplastic resin.
Claims20
A multi-layered thermoplastic roofing membrane comprising:
- a planar body including at least three layers, said at least three layers including (i) a top layer that includes magnesium hydroxide dispersed within a thermoplastic resin, (ii) an upper middle layer disposed below said top layer and including magnesium hydroxide and calcium carbonate dispersed within a thermoplastic resin, and (iii) a lower layer disposed below said upper middle layer and including magnesium hydroxide and calcium carbonate dispersed within a thermoplastic resin.
A roof system comprising:
- a substrate and thermoplastic membrane affixed to the substrate, where the thermoplastic membrane is a planar body including at least three layers, said at least three layers including
- (i) a top layer that includes magnesium hydroxide dispersed within a thermoplastic resin,
- (ii) an upper middle layer disposed below said top layer and including magnesium hydroxide and calcium carbonate dispersed within a thermoplastic resin, and
- (iii) a lower layer disposed below said upper middle layer and including magnesium hydroxide and calcium carbonate dispersed within a thermoplastic resin.
A method of forming a roofing system, the method comprising:
- (i) providing a roof deck;
- (ii) providing one or more of an insulation board, a cover board, or other roofing component to thereby form a roofing substrate;
- (iii) providing a multi-layered thermoplastic roofing membrane in the form of a roll, wherein the multi-layered thermoplastic roofing membrane is a planar body including at least three layers, said at least three layers including (i) a top layer that includes magnesium hydroxide dispersed within a thermoplastic resin, (ii) an upper middle layer disposed below said top layer and including magnesium hydroxide and calcium carbonate dispersed within a thermoplastic resin, and (iii) a lower layer disposed below said upper middle layer and including magnesium hydroxide and calcium carbonate dispersed within a thermoplastic resin;
- (iv) unrolling the multi-layered thermoplastic roofing membrane over a first portion of the roofing substrate such that said lower layer is in contact with said roofing substrate;
- and
- (v) attaching the multi-layered thermoplastic roofing membrane to said roofing substrate to thereby from a roofing system.
Dependencies are inferred from the claim text.