Patent · US Active

Process for producing surface-postcrosslinked water-absorbent polymer particles

US11142614B2 · kind B2 · utility

0Cited by

6References

12Claims

0Family size

Assignee

BASF SE

Inventors

Thomas Daniel · Waldsee, DE
Norbert Herfert · Charlotte, US
Stephan Bauer · Ostercappeln, DE
Katrin Baumann · Mannheim, DE
Birgit Reinhard · Schifferstadt, DE
Jürgen Freiberg · Lampertheim, DE
Christophe Bauduin · Ludwigshafen, DE
Katarzyna Dobrosielska-Oura · Ludwigshafen, DE
Michael A. Mitchell · Fort Mill, US

Key dates

Filing date	Dec 12, 2018
Grant date	Oct 12, 2021
Priority date	—
Expiry date	Aug 19, 2039

Classification

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

Abstract

The present invention relates to a process for producing surface-postcrosslinked water-absorbent polymer particles by coating of water-absorbent polymer particles having a content of residual monomers in the range from 0.03 to 15% by weight with at least one surface-postcrosslinker and thermal surface-postcrosslinking at temperatures in the range from 100 to 180° C.

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