US 12,473,674 B2
Bituminous membranes with biodegradable binder
Arno Bieser, Weinheim (DE); Katharina Ellmer, Monza (IT); Sandra Villing-Falusi, Mannheim (DE); Antonio La Porta, Mannheim (DE); and Luca Assumma, Seregno (IT)
Assigned to CARL FREUDENBERG KG, Weinheim (DE)
Appl. No. 18/252,538
Filed by Freudenberg Performance Materials GmbH & Co. KG, Weinheim (DE)
PCT Filed Nov. 9, 2021, PCT No. PCT/EP2021/081032
§ 371(c)(1), (2) Date May 11, 2023,
PCT Pub. No. WO2022/101163, PCT Pub. Date May 19, 2022.
Claims priority of application No. 20207194 (EP), filed on Nov. 12, 2020.
Prior Publication US 2024/0018706 A1, Jan. 18, 2024
Int. Cl. D04H 1/587 (2012.01); C09D 7/63 (2018.01); C09D 199/00 (2006.01); D04H 1/4218 (2012.01); D04H 1/435 (2012.01); D04H 1/4382 (2012.01); D04H 1/56 (2006.01); D04H 1/645 (2012.01); D04H 1/74 (2006.01); D06M 13/07 (2006.01); D06M 101/32 (2006.01)
CPC D04H 1/587 (2013.01) [C09D 7/63 (2018.01); C09D 199/00 (2013.01); D04H 1/4218 (2013.01); D04H 1/435 (2013.01); D04H 1/43835 (2020.05); D04H 1/56 (2013.01); D04H 1/645 (2013.01); D04H 1/74 (2013.01); D06M 13/07 (2013.01); D06M 2101/32 (2013.01); D06M 2200/10 (2013.01); D10B 2401/063 (2013.01); D10B 2505/00 (2013.01)] 20 Claims
 
1. A porous nonwoven for preparing membranes by impregnation of the nonwoven with bitumen, wherein all nonwoven fibers of the porous nonwoven are organic polymer fibers, wherein the nonwoven is consolidated with an aqueous binder, and wherein the binder comprises protein and a polyphenolic compound from natural origin.