公开(公告)号：US20220119554A1

公开(公告)日：2022-04-21

申请号：US17432573

申请日：2020-02-19

Applicant: BASF SE

Inventor： Qing Feng Tong ,  Laszlo Szarvas ,  Frederic Bauer

IPC: C08B9/00 ,  D01F2/10

Abstract: Described herein is a method for producing a viscose solution including a step of adding alkyl polyglycoside (APG) prior to and/or during xanthation of alkali cellulose. When APG is added prior to or during xanthation of alkali cellulose, the reactivity between alkali cellulose and CS2 could be increased and the xanthation could be accelerated, as a result of which formation of agglomerates and/or lumps in the obtained viscose solution and then the obtained viscose fiber spun therefrom is significantly reduced, relative to the situation when conventional surfactants such as phenyl ethoxylate are added likewise. Also described herein is a viscose solution obtained by the foresaid method, and a method for producing viscose fiber with the foresaid viscose solution or including the foresaid method.

公开(公告)号：US10968295B2

公开(公告)日：2021-04-06

申请号：US16344381

申请日：2017-10-24

Applicant: BASF SE

Inventor： Ferdinand Leifeld ,  Achim Fessenbecker ,  Steffen Henkes ,  Massimiliano Bordignon ,  Vandana Kurkal-Siebert ,  Laszlo Szarvas ,  Qing Feng Tong

IPC: C08F120/06 ,  C09C3/10 ,  C08F2/20 ,  C08F2/38 ,  C08F8/44 ,  C08K3/22 ,  C08K3/26 ,  C08K3/32 ,  C08F2/10 ,  B01F17/00 ,  C09C3/04

Abstract: An acrylic acid polymer having a weight average molecular weight Mw in the range from 3500 to 2000 g/mol and a polydispersity index Mw/Mn≤2.5, wherein 30% to 60% of the acid groups of the acrylic acid polymers have been neutralized with calcium ions, 30% to 70% of the acrylic acid polymers have been neutralized with sodium ions and 0% to 10% of the acid groups of the acrylic acid polymers have not been neutralized.