Ato Chimie

Paul R Foy

Gerard E Deleens

Camille Jungblut

Rene Kern

The invention relates to a method of preparing polyether-ester-amide block copolymers having recurrent units of the general formula: ##STR1## wherein A is a polyamide sequence and B a linear or branched polyoxyalkylene glycol sequence, the alkylene radical of which comprises at least two carbon atoms, and wherein n indicates that there is a great number of recurrent units. The plastic materials prepared by the novel method have mechanical properties which allow them to be used in technological transformation operations for the manufacture or moulded or extruded articles such as films, sheaths, fibres for textiles products, etc.. They may also be used for making bonded or welded linings. The novel method comprises reacting in the fused state at an elevated temperature and under high vacuum a dicarboxylic polyamide, the COOH groups of which are located at the chain ends, with a polyoxyalkylene glycol hydroxylated at the chain ends, in the presence of a catalyst constituted by a tetraalkylorthotitanate having the general formula Ti(OR).sub.4, wherein R is a linear or branched aliphatic hydrocarbon radical having 1 to 24 carbon atoms, such a methyl, isopropyl, butyl, ethylhexyl, dodecyl, hexadodecyl.

Mouldable and extrudable polyether-ester-amide block copolymers

A moldable and/or extrudable polyether-ester-amide block copolymer is disclosed which has the formula ##STR1## wherein A is a linear saturated aliphatic polyamide sequence formed from a lactam or amino acid having a hydrocarbon chain containing 4 to 14 carbon atoms or from an aliphatic C.sub.6 -C.sub.12 dicarboxylic acid and a C.sub.6 -C.sub.9 diamine, in the presence of a chain-limiting aliphatic carboxylic diacid having 4 to 20 carbon atoms; said polyamide having an average molecular weight between 300 and 15,000; and B is a polyoxyalkylene sequence formed from linear or branched aliphatic polyoxyalkylene glycols, mixtures thereof or copolyethers derived therefrom said polyoxyalkylene glycols having a molecular weight of between 200-6,000 and n indicates a sufficient number of repeating units so that said polyether-ester-amide block copolymer has an intrinsic viscosity of from about 0.8 to about 2.05. The polyether-ester-amide block copolymer is prepared by reacting a dicarboxylic polyamide, the COOH groups of which are located at the chain ends, with a pol-oxyalkylene glycol hydroxylated at the chain ends, in the presence of a catalyst constituted by a tetraalkylorthotitanate having the general formula Ti(OR).sub.4, wherein R is a linear branched aliphatic hydrocarbon radical having 1 to 24 carbon atoms.

Moldable and/or extrudable polyether-ester-amide block copolymers

The invention relates to a method of preparing polyether-ester-amide block copolymers having recurrent units of the general formula: ##STR1## wherein A is a polyamide sequence and B a linear or branched polyoxyalkylene glycol sequence, the alkylene radical of which comprises at least two carbon atoms, and wherein n indicates that there is a great number of recurrent units. The plastic materials prepared by the novel method have mechanical properties which allow them to be used in technological transformation operations for the manufacture or moulded or extruded articles such as films, sheaths, fibres for textiles products, etc. They may also be used for making bonded or welded linings. The novel method comprises reacting in the fused state at an elevated temperature and under high vacuum a dicarboxylic polyamide, the COOH groups of which are located at the chain ends, with a polyoxyalkylene glycol hydroxylated at the chain ends, in the presence of a catalyst constituted by a tetraalkylorthotitanate having the general formula Ti(OR).sub.4, wherein R is a linear or branched aliphatic hydrocarbon radical having 1 to 24 carbon atoms, such a methyl, isopropyl, butyl, ethylhexyl, dodecyl, hexadodecyl.

A process for synthesizing sequence copolyesteramides with the general formula

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Paris, France

Paul R Foy