Patent · US Active

Method for producing water-absorbing polymer particles by suspension polymerization

US11591424B2 · kind B2 · utility

0Cited by

2References

9Claims

0Family size

Assignee

BASF SE

Inventors

Stephan Bauer · Ostercappeln, DE
Tina Mark · Haßloch, DE
Lydia König · Speyer, DE
Yvonne Hagen · Waldsee, DE
Thomas Daniel · Waldsee, DE

Key dates

Filing date	Jun 26, 2020
Grant date	Feb 28, 2023
Priority date	—
Expiry date	Apr 30, 2041

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC08F2810/20
WIPO fieldMedical technology
WIPO sectorInstruments

Abstract

A process for producing water-absorbing polymer particles by suspension polymerization and thermal surface postcrosslinking, wherein the base polymer obtained by suspension polymerization has a centrifuge retention capacity of at least 37 g/g and the thermal surface postcrosslinking is conducted at 100 to 190° C.

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