Patent · US Active

Classification process for superabsorbent polymer particles

US11883848B2 · kind B2 · utility

0Cited by

14References

20Claims

0Family size

Assignee

BASF SE

Inventors

Rüdiger Funk · Niedernhausen, DE
Matthias Weismantel · Bad Orb, DE
Monte Peterson · Pearland, US
Patrick Hamilton · Freeport, US
Ronny De Kaey · Mortsel, BE
Karl J. Possemiers · Schilde, BE

Key dates

Filing date	Jul 20, 2018
Grant date	Jan 30, 2024
Priority date	—
Expiry date	Feb 11, 2039

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC08J2333/02
WIPO fieldChemical engineering
WIPO sectorChemistry

Abstract

The invention relates to a classification process for superabsorbent polymer particles, comprising classifying the water-absorbent polymer particles in a screen machine under reduced pressure wherein the pressure above the uppermost sieve is from 0 to 4.0 mbar per sieve higher than below the undermost sieve.

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