Verfahren zur Herstellung von hochmolekularen Polyoxymethylenen

High molecular weight polyoxymethylenes are produced by polymerizing formaldehyde in anhydrous medium in the presence of an organic compound containing at least one azomethine group as catalyst. The catalyst may be an amidine, a guanidine, an isourea, an isothiourea, an isomelamine, an iminoether, a...

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Bibliographic Details
Main Authors KRITZLER HELMUTH, WAGNER KUNO, MUELLER ERWIN
Format Patent
LanguageGerman
Published 12.11.1964
Subjects
CHEMISTRY
COMPOSITIONS BASED THEREON
MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
METALLURGY
ORGANIC MACROMOLECULAR COMPOUNDS
THEIR PREPARATION OR CHEMICAL WORKING-UP
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Summary:High molecular weight polyoxymethylenes are produced by polymerizing formaldehyde in anhydrous medium in the presence of an organic compound containing at least one azomethine group as catalyst. The catalyst may be an amidine, a guanidine, an isourea, an isothiourea, an isomelamine, an iminoether, a lactim ether, a hydrazone, a semicarbazone, a thiosemicarbazone, an azine, a Schiff's base or an oxime. A long list of specific catalysts is given. The anhydrous medium may be a solvent, e.g. cyclic and acyclic ethers, esters, cycloaliphatic and aromatic hydrocarbons, and halogenated hydrocarbons, specific examples being given.
Bibliography:Application Number: DE1959F028493