VERFAHREN ZUR REINIGUNG UND TROCKNUNG VON POLYMER-HYDROGELEN

This invention relates to a method for purifying and drying a polymer hydrogel. This invention is based in part upon the discovery that rapid drying of polymer hydrogels can eliminate the problem of unacceptable levels of soluble oligomers caused by prolonged thermal treatment. Rapid drying techniqu...

Full description

Saved in:
Bibliographic Details
Main Authors BODMER, RICHARD, V. JR, THOMAS, PETER W, REA, GARY S, MCDONNELL, PETER D, LARROUSSE, MARK F
Format Patent
LanguageGerman
Published 15.02.2010
Subjects
AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G
CHEMISTRY
COMPOSITIONS BASED THEREON
GENERAL PROCESSES OF COMPOUNDING
MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVINGCARBON-TO-CARBON UNSATURATED BONDS
METALLURGY
ORGANIC MACROMOLECULAR COMPOUNDS
THEIR PREPARATION OR CHEMICAL WORKING-UP
WORKING-UP
Online AccessGet full text

Cover

More Information
Summary:This invention relates to a method for purifying and drying a polymer hydrogel. This invention is based in part upon the discovery that rapid drying of polymer hydrogels can eliminate the problem of unacceptable levels of soluble oligomers caused by prolonged thermal treatment. Rapid drying techniques allow drying hydrogels containing more water than was previously considered possible without a loss in product quality. Furthermore, it was discovered that slurries comprising polymer hydrogels and large quantities of water can be spray dried and that spray drying can be conducted with only minimal oligomer formation.
Bibliography:Application Number: AT20080075074T