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US 12,428,842 B2Granted
Multi-layered thermoplastic roofing membranes
AssigneeAmrize Technology Switzerland LLC
InventorsHao Wang, Donna C. Tippmann, Michael J. Hubbard
Life of this patent
Estimating the term…
Abstract
A multi-layered membrane comprising skin layers including an ethylene-based olefinic block copolymer (EBOC); and two or more core layers including a propylene-based elastomer (PBE).
Claims19
A multi-layered membrane comprising:
- (i) skin layers, where each skin layer includes from about 40 to about 85 percent by weight ethylene-based olefinic block copolymer, based on the total weight of the thermoplastic component of the respective skin layers, and at least 33% by weight filler based on the total weight of the respective skin layers;
- and
- (ii) two or more core layers, where each core layer includes greater than 24% by weight propylene-based elastomer, based on the polymeric content of the respective core layers, and at least 20% by weight filler based on the total weight of the respective core layers.
Dependencies are inferred from the claim text.