Arkema France

Stefania Cassiano Gaspar

Benoît Brule

Jean-Jacques Flat

Thierry Briffaud

Quentin P Pineau

Mathieu Sabard

Patrick Dang

Marie Pommier De Santi

Rui Mao

Damien Vitry

A copolyamide including at least two distinct units A and XY of formula A/XY, wherein: A is a repeating unit obtained by polycondensation of: at least one Cto Camino acid, or at least one Cto Clactam, or at least one C-Cdicarboxylic acid Cb; XY is a repeating unit obtained from the polycondensation of at least one Cto Clinear aliphatic diamine (X), and at least one aromatic dicarboxylic acid (Y), to prepare a composition comprising betweenand 65% of reinforcing fibers, relative to the total weight of the composition, and for which the flexural modulus or tensile modulus, measured after an identical conditioning, does not vary by more than 20% in the temperature range from 20° C. to 40° C.

Copolyamide compositions comprising reinforcing fibers and having high modulus stability and uses thereof

The invention relates to the use of a composition comprising at least one semi-crystalline copolyamide A/X1Y in which: —A is a repeat unit obtained from the polycondensation of at least one C6 to C12 lactam, or at least one repeat unit XY obtained from the polycondensation of at least one aliphatic C4 to C18 diamine (X), and of at least one aliphatic C6 to C18, in particular C6 to C12, dicarboxylic acid (Y), —X1Y is a repeat unit obtained from the polycondensation of a diamine (X1) chosen from an arylamine, a cycloaliphatic diamine and a branched aliphatic diamine and of at least one aliphatic dicarboxylic acid (Y) identical to that of the unit XY, the A/X1Y weight ratio being from 60/40 to 95/5, glass fibres having a circular cross section, and optionally at least one impact modifier and/or at least one additive, for limiting warping while at the same time maintaining the cycle time of the obtained composition suitable for processing thereof, in particular by injection moulding.

Use of a copolyamide composition as a matrix of filler material with glass fibres having a circular cross section for limiting warping

The present invention relates to a polymer composition comprising a polymer comprising methyl methacrylate, (meth)acrylic acid and styrene monomers. In particular, the present invention relates to a polymer composition comprising a polymer comprising methyl methacrylate, (meth)acrylic acid and styrene monomers, said composition having particularly advantageous compromises of heat-resistant, fluidity, scratch-resistant and chemical-resistant properties. The present invention also relates to a molded or extruded object comprising a polymer comprising methyl methacrylate, (meth)acrylic acid and of styrene monomers, and the use of these objects.

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Bernay, France

Stefania Cassiano Gaspar