US 12,168,842 B2
Modified cellulose-based natural binder for nonwoven fabrics
Abdus Salam, Harrisburg, NC (US); Timothy Kistemaker, Mooresville, NC (US); Kirk Stallsmith, Denver, NC (US); and Mark A. Lemere, Hobart, WI (US)
Assigned to Glatfelter Corporation, Charlotte, NC (US)
Appl. No. 16/963,586
Filed by Glatfelter Corporation, Charlotte, NC (US)
PCT Filed Jan. 31, 2019, PCT No. PCT/US2019/016031
§ 371(c)(1), (2) Date Jul. 21, 2020,
PCT Pub. No. WO2019/152638, PCT Pub. Date Aug. 8, 2019.
Claims priority of provisional application 62/624,377, filed on Jan. 31, 2018.
Prior Publication US 2021/0054548 A1, Feb. 25, 2021
Int. Cl. D04H 1/587 (2012.01); C08L 1/28 (2006.01)
CPC D04H 1/587 (2013.01) [C08L 1/286 (2013.01); C08L 2201/06 (2013.01); C08L 2201/54 (2013.01)] 17 Claims
 
1. An aqueous cellulosic binder comprising a modified cellulose, water, a wet strength agent, an electrolyte and a crosslinking agent; wherein the aqueous cellulosic binder is characterized by a weight ratio of water to modified cellulose of from about 99.9:0.1 to about 1,000:500; wherein a weight ratio of the crosslinking agent to the modified cellulose ranges from about 1:2 to about 1:1,000; wherein the modified cellulose comprises carboxymethylcellulose (CMC) and/or sodium carboxymethylcellulose (sodium CMC); wherein the crosslinking agent comprises a carboxylic acid having two or more carboxyl groups; and wherein the wet strength agent comprises at least one reactive functional group selected from the group consisting of a halide group, a hydroxyl group, and combinations thereof.