Method for preparing ether-ester-amide block polymers for among other moulding, extruding or spinning uses
AssigneeAto Chimie
InventorsGerard Deleens, Jacques Ferlampin, Michele Gonnet
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Abstract
Process for preparing ether-ester-amide block polymers. It consists in the reaction, in the molten state of a dicarboxylic polyamide having COOH end groups with a polyoxyalkylene glycol having hydroxyl end groups in the presence of metallic tetraalkoxide(s) as catalysts. The tetraalkoxide(s) used are of the formula M(OR).sub.4 where M is Zr or Hf and the radicals R, identical or different are linear or branched C.sub.1 -C.sub.24 alkyl radicals.
Claims18
A process for preparing ether-ester-amide block polymer comprising reacting in the molten state a dicarboxylic polyamide, the COOH functions of which are located at the ends of the chain, with a polyalkylene glycol having hydroxyl end groups, in the presence of one or more metallic tetraalkoxides as catalyst, wherein the tetraalkoxide(s) used as the catalyst have the general formula M(OR).sub.4, in which M is zirconium or hafnium and the symbols R, identical or different, are linear or branched C.sub.1 to C.sub.24 alkyl radicals.
A process according to claim 8, wherein the said average molecular weight is between 800 and 5000.
Dependencies are inferred from the claim text.