Patent · US Active

Process for producing water-absorbing polymer particles with low caking tendency and high absorption under pressure

US8410221B2 · kind B2 · utility

0Cited by

3References

6Claims

0Family size

Assignee

BASF SE

Inventors

Thomas Daniel · Waldsee, DE
Christophe Bauduin · Ludwigshafen, DE
Norbert Herfert · Charlotte, US

Key dates

Filing date	Jun 24, 2010
Grant date	Apr 2, 2013
Priority date	—
Expiry date	Jun 24, 2030

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC08F222/102
WIPO fieldMacromolecular chemistry, polymers
WIPO sectorChemistry

Abstract

A process for producing water-absorbing polymer particles with low caking tendency and high absorption under pressure, comprising polymerization of a monomer solution or suspension, drying of the resulting polymer gel, grinding, classifying, thermal surface postcrosslinking and coating with silicon dioxide, wherein the water-absorbing polymer particles have been coated, before, during or after the surface postcrosslinking with aluminum cations.

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