Arkema France

Stefânia Cassiano Gaspar

Benoît Brule

Thierry Briffaud

Mathieu Sabard

Benjamin Saillard

Xiong Yao

Fabienne Olivier-chanu

Marie Pommier De Santi

Joël Verger

A process for manufacturing a transparent polyamide including a step of polycondensation of a mixture of monomers including at least one dicarboxylic acid and at least one cycloaliphatic diamine, in which the cycloaliphatic diamine includes two rings linked by an alkylene group including 1 to 6 carbon atoms, each ring being substituted by an amine group and at least one alkyl group, which may be identical or different, including 1 to 6 carbon atoms, wherein the diamine decomposes into six isomer fractions when it is subjected to analysis by gas chromatography on a nonpolar column and, when the isomer fractions are named isomer fractions I to VI in their order of elution, the mass content Fof fraction I of the cycloaliphatic diamine does not exceed 35%. A transparent polyamide capable of being obtained by the process, and to articles obtained from such a polyamide or from such a formulation.

Method for the production of transparent polyamides

The field of molded articles and fiber-reinforced thermoplastic compositions for obtaining them. The use of the reinforced thermoplastic composition for obtaining a thin molded article with reduced warpage. The composition may include: from 30 to 70% by weight of an amorphous polyamide matrix by total weight of the composition; from 30 to 70% by weight of glass fibers with a circular cross-section by total weight of the composition; and optionally additives.

Use of a reinforced thermoplastic composition

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Serquigny, France

Stefânia Cassiano Gaspar