公开(公告)号：US12083496B2

公开(公告)日：2024-09-10

申请号：US17046033

申请日：2019-04-09

Applicant: BASF SE

Inventor： Norbert Herfert ,  Bootsara Parchana ,  Sunantha Kaenthong ,  Stephan Bauer ,  Thomas Daniel ,  Katrin Baumann

IPC: B01J20/26 ,  B01J20/28 ,  B01J20/30 ,  C08F220/06

CPC classification number: B01J20/267 ,  B01J20/28016 ,  B01J20/3021 ,  B01J20/3085 ,  C08F220/06 ,  C08F2800/10 ,  C08F2810/20

Abstract: The invention relates to a process for producing long-term color stable superabsorbent polymer particles, comprising polymerization of a monomer solution, wherein the monomer solution comprises at least 0.01% by weight of 1-hydroxyethane-1,1-diphosphonic acid or a salt thereof and at least 0.01% by weight of 2-hydroxy-2-sulfonatoacetic acid or a salt thereof.

公开(公告)号：US20210121852A1

公开(公告)日：2021-04-29

申请号：US17046033

申请日：2019-04-09

Applicant: BASF SE

Inventor： Norbert Herfert ,  Bootsara Parchana ,  Sunantha Kaenthong ,  Stephan Bauer ,  Thomas Daniel ,  Katrin Baumann

IPC: B01J20/26 ,  C08F220/06 ,  B01J20/28 ,  B01J20/30

Abstract: The invention relates to a process for producing long-term color stable superabsorbent polymer particles, comprising polymerization of a monomer solution, wherein the monomer solution comprises at least 0.01% by weight of 1-hydroxyethane-1,1-diphosphonic acid or a salt thereof and at least 0.01% by weight of 2-hydroxy-2-sulfonatoacetic acid or a salt thereof.