Patent · US Active

Superabsorbent polymer with high permeability

US8883881B2 · kind B2 · utility

4Cited by

74References

28Claims

0Family size

Assignee

Evonik Corporation · US

Inventors

Scott J. Smith · Greensboro, US
Stan McIntosh · Greensboro, US
Heinz Bremus · Kevelaer, DE
Frank Loeker · Krefeld, DE

Key dates

Filing date	Jul 11, 2013
Grant date	Nov 11, 2014
Priority date	—
Expiry date	Jul 11, 2033

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC08L25/04
WIPO fieldOther special machines
WIPO sectorMechanical engineering

Abstract

The invention relates to absorptive, crosslinked polymers which are based on partly neutralized, monoethylenically unsaturated monomers carrying acid groups wherein the absorptive crosslinked polymer may be coated with a thermoplastic polymer, and have improved properties, in particular in respect of their capacity for transportation of liquids in the swollen state, and which has a high gel bed permeability and high centrifuge retention capacity.

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