Patent · US Expired

Modified superabsorbent polymer based on polyacrylonitrile emulsions

US6288158A · kind A · utility

10Cited by

14References

11Claims

0Family size

Assignee

BAYER HEALTHCARE LLC · DE

Inventors

Sergej Schapowalov · Mortsel, BE
Gunter Sackmann · Leverkusen, DE
Rolf-Volker Meyer · Krefeld, DE
Siegfried Korte · Odenthal, DE

Key dates

Filing date	Feb 9, 1999
Grant date	Sep 11, 2001
Priority date	—
Expiry date	Feb 9, 2019

Classification

Technology area (CPC H)Electricity
CPC primaryH01B3/428
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

A process for modifying superabsorbent polymers is disclosed. The surface of a polymer containing hydrolyzed polyacrylonitrile in the form of particulates, is modified by crosslinking in a water/alcohol reaction mixture and in the presence of silica. The resulting product features improved absorbency under load and lesser degree of gel blocking.

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