Patent · US Active

Method for producing water-absorbent polymer particles with improved properties

US9840598B2 · kind B2 · utility

0Cited by

20References

8Claims

0Family size

Assignee

BASF SE

Inventors

Christophe Bauduin · Ludwigshafen, DE
Thomas Daniel · Waldsee, DE
Asif Karim · Mannheim, DE

Key dates

Filing date	Jun 21, 2013
Grant date	Dec 12, 2017
Priority date	—
Expiry date	Jul 10, 2033

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC08J2333/02
WIPO fieldMedical technology
WIPO sectorInstruments

Abstract

The present invention relates to a process for producing water-absorbing polymer particles having an improved profile of properties, comprising thermal surface postcrosslinking in the presence of a salt of a polyvalent metal cation and a complexing anion and subsequent aftertreatment, the aftertreatment comprising coating with a salt of a polyvalent metal cation and a non-complexing anion, and remoisturization with further drying.

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