Patent · US Active

Process for producing surface-postcrosslinked water-absorbent polymer particles

US10208170B2 · kind B2 · utility

1Cited by

4References

17Claims

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	Nov 7, 2013
Grant date	Feb 19, 2019
Priority date	—
Expiry date	Feb 8, 2036

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.