Patent · US Active

Process for producing water-absorbing polymer particles with high free swell rate

US9833769B2 · kind B2 · utility

0Cited by

5References

14Claims

0Family size

Assignee

BASF SE

Inventors

Thomas Daniel · Waldsee, DE
Volker Braig · Weinheim, DE
Asif Karim · Mannheim, DE

Key dates

Filing date	Feb 3, 2012
Grant date	Dec 5, 2017
Priority date	—
Expiry date	Aug 4, 2035

Classification

Technology area (CPC B)Performing Operations; Transporting
CPC primaryB01J2220/68
WIPO fieldChemical engineering
WIPO sectorChemistry

Abstract

The invention relates to a process for producing water-absorbing polymer particles with high free swell rate, comprising the steps of polymerization, drying, grinding, classification and thermal surface postcrosslinking, remoisturization and drying again.

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