	US 12,325,215 B2
	Roof underlayment
Khaled El-Tahlawy, Hickory, NC (US); and Ameet Kulkarni, Hickory, NC (US)
Assigned to Shurtape Technologies, LLC, Hickory, NC (US)
Appl. No. 17/782,013
Filed by Shurtape Technologies, LLC, Hickory, NC (US)
PCT Filed Dec. 2, 2020, PCT No. PCT/US2020/062922 § 371(c)(1), (2) Date Jun. 2, 2022, PCT Pub. No. WO2021/113385, PCT Pub. Date Jun. 10, 2021.
Claims priority of provisional application 62/942,460, filed on Dec. 2, 2019.
Prior Publication US 2023/0020860 A1, Jan. 19, 2023
Int. Cl. B32B 27/12 (2006.01); B32B 5/02 (2006.01); B32B 27/20 (2006.01); B32B 27/30 (2006.01); E04D 12/00 (2006.01)

CPC B32B 27/12 (2013.01) [B32B 5/022 (2013.01); B32B 27/20 (2013.01); B32B 27/302 (2013.01); B32B 27/306 (2013.01); B32B 27/308 (2013.01); E04D 12/002 (2013.01); B32B 2260/021 (2013.01); B32B 2260/046 (2013.01); B32B 2260/048 (2013.01); B32B 2262/0246 (2013.01); B32B 2262/0261 (2013.01); B32B 2262/101 (2013.01); B32B 2262/106 (2013.01); B32B 2307/3065 (2013.01); B32B 2307/7242 (2013.01); B32B 2307/7265 (2013.01); B32B 2307/73 (2013.01); B32B 2307/744 (2013.01); B32B 2419/06 (2013.01)]

11 Claims

1. An air and water barrier article comprised of multiple layers, said layers comprised of a polymeric layer comprised of styrene acrylic polymer and/or styrene butadiene polymer and/or ethylene vinyl acetate polymer and a filler, a porous layer comprised of a nonwoven polypropylene and/or polyester, optionally including fiberglass, carbon fiber nylon fiber, and/or acrylic fiber and including a polymeric saturant comprised of a water dispersed polymer selected from styrene butadiene rubber, acrylic polymer, ethylene vinyl acetate, nitrile rubber, PTFE, polychloroprene, EPDM, and/or polyvinylidene fluoride, the polymeric layer and the polymeric saturant being different polymers, the polymeric layer disposed on a side of the porous layer, and a pressure sensitive adhesive disposed on a side of the polymeric layer opposed to the porous layer, the polymeric layer and the porous layer being comprised of a material having a Tg between −40° C. and 40° C., and wherein said barrier article has nail sealability satisfying ASTM D-1970/D-1970 M-13 and has a weight of less than 40 ounces per square yard.