Patent · US Active

Process for producing superabsorbents

US12083496B2 · kind B2 · utility

0Cited by

0References

5Claims

0Family size

Assignee

BASF SE

Inventors

Norbert Herfert · Charlotte, US
Bootsara Parchana · Bang Phra, TH
Sunantha Kaenthong · Rayong, TH
Stephan Bauer · Ostercappeln, DE
Thomas Daniel · Waldsee, DE
Katrin Baumann · Mannheim, DE

Key dates

Filing date	Apr 9, 2019
Grant date	Sep 10, 2024
Priority date	—
Expiry date	Oct 27, 2039

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC08J2333/02
WIPO fieldChemical engineering
WIPO sectorChemistry

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.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.