Process for the preparation of polymeric hydroxyalkyl terminated polysulphides

The invention relates to a method for production of polymeric hydroxylalkyl terminated polysulphides, whereby monomeric hydroxylalkyl terminated polysulphides are reacted with formaldehyde in the presence of an acid catalyst in the form of a solid acid, in particular, an acidic ion exchanger, in whi...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: Zeitler, Michael, Kottner, Nils, Bergfeld, Manfred
Format: Patent
Sprache:eng
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Beschreibung
Zusammenfassung:The invention relates to a method for production of polymeric hydroxylalkyl terminated polysulphides, whereby monomeric hydroxylalkyl terminated polysulphides are reacted with formaldehyde in the presence of an acid catalyst in the form of a solid acid, in particular, an acidic ion exchanger, in which the reaction water and optional added solvent and catalyst are separated off. The products are characterized by a very high uniformity (low polydispersity) and can advantageously be functionalized with subsequent reactions.