Patent · US Expired

Starch-based semipermeable films

US4454268A · kind A · utility

71Cited by

3References

16Claims

0Family size

Assignee

The United States of America, as represented by the Secretary of Agriculture · US

Inventors

Felix H. Otey · Peoria, US
Richard P. Westhoff · Peoria, US

Key dates

Filing date	Jun 23, 1983
Grant date	Jun 12, 1984
Priority date	—
Expiry date	Jun 23, 2003

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC08L3/02
WIPO fieldChemical engineering
WIPO sectorChemistry

Abstract

Semipermeable films useful as dialysis membranes are prepared from starch-based composites. The films are shaped by conventional methods from a plasticized matrix comprising highly gelatinized starch and ethylene acrylic acid copolymer neutralized with a strong alkali. These films are remarkably transparent and resistant to degradation in the presence of aqueous solutions.

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