Atochem

Elf Atochem S.a.

Daniel Cuzin

Didier Judas

Philippe Maj

Philippe Blondel

Jean-Luc Perillon

Andre-Jean Berteaud

A composite material comprising a substrate which is not or very slightly excitable by microwaves and a coating on at least a portion of said substrate based on polymeric composition containing at least 50% by weight of a polymer excitable by microwaves, wherein the melting point of the substrate is lower than the film-formation temperature of the polymeric composition and the process of making such composite.

Composite material comprising a substrate and a polymeric based coating

Block copolyetheramides, well adopted for conversion into a wide variety of useful thermoplastic elastomer shaped articles, have the formula: ##STR1## in which D is the residue of a diacid oligamide having an Mn ranging from 300 to 3,000 and/or the residue of the diacid chain limiter, PE is the residue of a polyetherdiol having an Mn ranging from 200 to 5,000,.times.is a straight or branched chain (cyclo)aliphatic or aromatic hydrocarbon having from 4 to 20 carbon atoms, n is a number ranging from 1 to 4, and m is an average number ranging from 2 to 50; these are prepared by polycondensing a multiblock polymer having the formula: ##STR2## with a diamine H.sub.2 N--X--NH.sub.2.

Block copolyetheramides

A transparent polyamide containing terephthalic acid radicals or radicals of the mixture of terephthalic and isophthalic acids and a cycloaliphatic diamine radical and having the chain formations: ##STR1## in which: y.sub.1 +y.sub.2 is between 10 and 200 with y.sub.1 /(y.sub.1 +y.sub.2)&gt;0.5;

Transparent copolyamide from oligomeric amide and cycloaliphatic diamine

Polyester amides and polyether thioether ester amides of the formula ##STR1## wherein A is a polyamide sequence,

Polyester amides and polyether thioether ester amides and process for

Novel polyesteramides and polyetheresteramides are provided which have the formula: ##STR1## wherein A represents a divalent polyamide group,

Polyesteramides, polyetheresteramides and process for preparation thereof

Compositions for the preparation of thermosetting or thermoplastic polymers, which compositions comprise a mixture of at least one polyepoxide and at least one polyamide oligomer, wherein the oligomer is a primary monoamine, an alpha,omega-primary or -secondary diamine, an alpha,omega-diacid or an alpha-primary amine,omega-acid, together with process for preparing polymers and the uses of such materials for molding and for adhesives.

Bonding method employing polyamide oligomer-epoxy polymer adhesives

Compositions for the preparation of thermosetting or thermoplastic polymers, which compositions comprise a mixture of at least one polyepoxide and at least one polyamide oligomer, wherein the oligomer is a primary monoamine, an alpha,omega-primary or -secondary diamine, an alpha,omega-diacid or an alpha-primary amine,omega-acid, together with processes for preparing polymers and the uses of such materials for molding and for adhesives.

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Port Marly, France

Daniel Cuzin