Polyhydantoin powder prepn. from reaction solns - by dilution with water-immiscible solvent and spraying with steam

Polyhydantoin powders are prepd. continuously by setting polyhydantoin reaction solns. to solids concn. 2-30(5-15)wt.% with a water-immiscible low-boiling solvent; spraying with steam through a two-component nozzle into a heated tube-system and sepg. solvent-free polyhydantoin powder from gas-phase...

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Bibliographic Details
Main Authors HUCKS, UWE, 4100 DUISBURG, VERNALEKEN, HUGO., 4150 KREFELD, JERCHEL, KARL-FRIEDRICH.., 4150 KREFELD
Format Patent
LanguageEnglish
German
Published 19.02.1976
Edition2
Subjects
AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G
CHEMISTRY
COMPOSITIONS BASED THEREON
GENERAL PROCESSES OF COMPOUNDING
METALLURGY
ORGANIC MACROMOLECULAR COMPOUNDS
THEIR PREPARATION OR CHEMICAL WORKING-UP
WORKING-UP
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Summary:Polyhydantoin powders are prepd. continuously by setting polyhydantoin reaction solns. to solids concn. 2-30(5-15)wt.% with a water-immiscible low-boiling solvent; spraying with steam through a two-component nozzle into a heated tube-system and sepg. solvent-free polyhydantoin powder from gas-phase in a cyclone and if necessary removing residual solvent by after-drying. The non-tacky dry powder obtd. can be easily processed into high temp.-resistant mouldings, foils, e.g., for electrical insulation, films, coatings and fibres.
Bibliography:Application Number: DE19742437913