Die Oximierung von Disacryl wird beschrieben. Ferner werden Bedingungen fiir eine quantitative Bestimmung von Aldehydgruppen in polymeren Acroleinen mitgeteilt. Es wird festgestellt, daB Disacryl und ein durch Redox-Polymerisation gewonnenes Polyacrolein etwa 65 yo reaktionsfahige Aldehydgruppen enthalten. Bei Polyacroleinen, die mittels Borfluorid-btherat oder Kaliumcarbonat gewonnen wurden, betragt der Umsatz mit Hydroxylamin nur etwa 20% d. Th.
SUMMARY:The oximation reaction of disacryl is described. The conditions of a quantitative determination of aldehyde function in polymeric acroleins have been investigated. It has been shown, that disacryl and an other polyacrolein, prepared by a redox-polymerisation, contain 65 yo reactive aldehyde groups. The reaction of hydroxylamine hydrochloride with polyacroleins, prepared by diethyl etherborontrifluoride or potassium carbonate, reached only 20 yo of theoretical conversion.
Z U S A M M E N F A S S U N G :Die Umsetzung verschiedener Polyacroleine mit primiiren Alkoholen wird beschrieben.Es entstehen in organischem Medium losliche polymere Acetale. Diese lassen sich durch S S m n wieder in die Komponenten spalten. Durch viskosimetrische und osmotische Messungen wird gezeigt, daB diese Acetale und somit auch die Polyacroleine makromolekulare Stoffe sind.
SUMMARY:The reaction of several polyacroleins with primary alcohols is described. Polymeric acetals soluble in organic solvents are formed. These acetals split in the components by the action of acids. By viscosimetric and osmotic measurements was shown, that these acetals are macromolecular products and therefore the polyacroleins too.
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