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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Main Authors | , , |
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Format | Patent |
Language | English German |
Published |
19.02.1976
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Edition | 2 |
Subjects | |
Online Access | Get full text |
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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. |
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Bibliography: | Application Number: DE19742437913 |