Block copolyetheramide suitable for injection molding and process for preparing it

Block copolyetheramide suitable for injection molding and process for preparing it

Block copolyetheramide suitable for injection molding, consisting of polyamide blocks and polyalkylene ether blocks and having a melting point ranging from 215 DEG to 223 DEG C., an apparent viscosity, at 230 DEG C., ranging from 50 to 150 Pa, a number average molecular weight ranging from 10,000 to...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: CIAPERONI, ALDEMARO
Format: Patent
Sprache:eng
Schlagworte:
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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Beschreibung
Zusammenfassung:Block copolyetheramide suitable for injection molding, consisting of polyamide blocks and polyalkylene ether blocks and having a melting point ranging from 215 DEG to 223 DEG C., an apparent viscosity, at 230 DEG C., ranging from 50 to 150 Pa, a number average molecular weight ranging from 10,000 to 50,000 and a yellow degree, measured by means of an Elrepho TM apparatus, lower than or equal to 20. They are prepared by polymerizing the polyamide monomers in the presence of hypophosphorous acid or meta-hypophosphorous acid and then by polycondensing the polyamide with polyalkylene ether having hydroxyl end groups.