Fremgangsmåder til fremstilling af blokcopolyetheramider som er egnet til sprøjtestøbning

Fremgangsmåder til fremstilling af blokcopolyetheramider som er egnet til sprøjtestøbning

Disclosed are block copolyetheramides suitable for injection moulding, comprising polyamide and polyalkylene ether blocks and having a melting point of from 215 to 223 DEG C, an apparent viscosity, at 230 DEG C, of from 50 to 150 Pa.s, a number average molecular weight of from about 4300 to 50000 an...

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1. Verfasser: CIAPERONI, ALDEMARO
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Sprache:dan
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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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creator CIAPERONI, ALDEMARO
description Disclosed are block copolyetheramides suitable for injection moulding, comprising polyamide and polyalkylene ether blocks and having a melting point of from 215 to 223 DEG C, an apparent viscosity, at 230 DEG C, of from 50 to 150 Pa.s, a number average molecular weight of from about 4300 to 50000 and a degree of yellowing, measured by means of an Elrepho apparatus, of not higher than 20. The process for producing said copolyetheramides comprises the polymerization of the polyamide-forming monomer(s) in the presence of hypophosphorous acid and/or meta-hypophosphorous acid and the subsequent polycondensation of the polyamide with a polyalkylene ether having terminal hydroxy and/or amine groups in the absence of polycondensation catalysts.
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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
title Fremgangsmåder til fremstilling af blokcopolyetheramider som er egnet til sprøjtestøbning
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