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US 8,834,993 B2Granted
Thermoplastic single ply protective covering
AssigneeBuilding Materials Investment Corporation
InventorLi-Ying Yang
Life of this patent
Estimating the term…
Abstract
A thermoplastic single ply protective roof covering may have two pressure sensitive rubber-based adhesive backings These dual-adhesive backings may be used to provide for a non-heat welded seam having a combination of good seam strength and fire performance.
Claims13
A self-adhering membrane, comprising:
- a thermoplastic polyolefin (TPO) membrane;
- a first adhesive backing disposed on a first surface of the TPO membrane;
- a second adhesive backing disposed on the first surface of the TPO membrane and adjacent to the first adhesive backing, the second adhesive backing extending through an edge portion of the first surface;
- and
- a third adhesive backing disposed on a second surface of the TPO membrane, the third adhesive backing extending through an edge portion of the second surface of the TPO membrane;
- wherein a width of the edge portion of the first surface and a width of the edge portion of the second surface are each about 3 to 9 inches, and a height of the second adhesive backing is larger than a height of the third adhesive backing;
- wherein the first adhesive backing comprises a filled butyl rubber based adhesive making up at least about 20% of the first adhesive backing by weight;
- wherein the second and third adhesive backings each comprise a non-filled butyl rubber based adhesive making up at least about 20% of the respective adhesive backing by weight;
- and
- wherein at least one of the second and third adhesive backings comprises about 2% to 4% polyolefin wax by weight.
7 more elements
A method of preparing a self-adhering membrane, comprising:
- providing a thermoplastic polyolefin (TPO) membrane;
- disposing a first adhesive backing on a first surface of the TPO membrane;
- disposing a second adhesive backing on the first surface of the TPO membrane and adjacent to the first adhesive backing, the second adhesive backing extending through an edge portion of the first surface;
- and
- disposing a third adhesive backing a second surface of the TPO membrane, the third adhesive backing extending through an edge portion of the second surface of the TPO membrane;
- wherein disposing the second adhesive backing comprises forming the second adhesive backing to have a width of about 3 to 9 inches across the edge portion of the first surface, and a second adhesive backing height;
- wherein disposing the third adhesive backing comprises forming the third adhesive backing to have (i) a width of about 3 to 9 inches across the edge portion of the second surface and (ii) a third adhesive backing height, the second adhesive backing height being larger than the third adhesive backing height;
- wherein the first adhesive backing comprises a filled butyl rubber based adhesive making up at least about 20% of the first adhesive backing by weight;
- wherein the second and third adhesive backings each comprise a non-filled butyl rubber based adhesive making up at least about 20% of the respective adhesive backing by weight;
- and
- wherein at least one of the second and third adhesive backings comprises about 2% to 4% polyolefin wax by weight.
8 more elements
Dependencies are inferred from the claim text.