Arkema France

Benjamin Saillard

Philippe Blondel

Thierry Briffaud

Mathieu Sabard

Maho Yasuda

Claire Michalowicz

Benoît Brule

Jean-Jacques Flat

Julien Jouanneau

Karine Loyen

Patrick Dang

Frédéric Malet

Eric Gamache

Barbara Ramfel

François Fernagut

Francois Fernagut

Regis Cipriani

Stefânia Cassiano Gaspar

Marie Pommier De Santi

Guillaume Lê

Joël Verger

Fabienne Olivier-chanu

Claire Isabelle Michalowicz

Célia Paillares

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

A polyamide-based polymer composition including: a) 50% to 98% by weight of a transparent amorphous polyamide; b) 1% to 15% by weight of a polymer in the form of core-shell particles; and c) 1% to 15% by weight of a polyether block and polyamide block copolymer, wherein the polyether block and polyamide block copolymer has: as a 2 mm layer, a transmittance at 560 nm of 90% or more; and a refractive index that does not differ by more than 0.01 from that of the transparent amorphous polyamide and wherein the polymer in the form of core-shell particles has a refractive index that does not differ by more than 0.01 from that of the transparent amorphous polyamide. Also, a process for the manufacture of the composition, and the composition capable of being obtained by said process.

Transparent polymeric composition

The invention relates to the use of a composition comprising at least one polyamide, of which at least one is a semicrystalline copolyamide comprising at least one minor motif resulting from the polycondensation of: at least one diamine with at least one polymerised fatty acid, in particular a fatty acid dimer; or at least one diamine dimer with at least one carboxylic acid; or at least one amino acid dimer; or mixtures of same, as a sealing coating in a pipe containing oil or gas, said pipe being used in the operation of offshore oil or gas deposits.

Polyamide-based composition for pipes containing oil or gas

The invention relates to the use of at least one impact modifier having a refractive index IRin a polyamide matrix consisting of a mixture of amorphous polyamide and semicrystalline polyamide, said matrix having a refractive index IR2, the difference in absolute value of IR-IRnot exceeding 0.006, to produce a transparent composition having a fatigue strength, under the fatigue test referred to as notched 'Ross-Flex', greater than 50 000 at &#x2212;10&#xb0; C.

Rigid and ductile polyamide-based transparent composition and use thereof

The present invention relates to a copolyamide comprising at least two units and corresponding to the following general formula:A/(diamine)&#xb7;(Cdiacid),in which: The invention also relates to a composition comprising this copolyamide and to the use of this copolyamide and of such a composition.

Copolyamide, composition comprising such a copolyamide and uses thereof

The present invention relates to transparent polyamide-based composition, comprising: The invention also relates to the manufacture of said composition, its use for the manufacture of transparent articles, said transparent articles and their process of manufacture.

Transparent polyamide-based composition comprising a glass filler with low silica content

The use of at least one semi-crystalline polyamide in a glass-charged amorphous polyamide resin for producing a composition which is more transparent than the resin. Polyamide-based transparent composition manufactured according to the use of the semi-crystalline polyamide, including: from 5.0 to 40.0% by weight of semicrystalline polyamide, from 20.0 to 80.0% by weight of at least one amorphous, transparent and at least partially cycloaliphatic polyamide, from 5.0 to 40.0%, preferably from 5.0 to 30.0%, by weight of glass filler, and optionally: from 0.0 to 5.0% by weight of PEBA, from 0.0 to 5.0% by weight of additives, with respect to the total weight of the composition.

Transparent polyamide-based composition comprising glass as filler

The present invention relates to a copolyamide comprising at least two units and corresponding to the following general formula:A/(diamine).(Cw diacid),in which: The invention also relates to a composition comprising this copolyamide and to the use of this copolyamide and of such a composition.

Copolyamide, composition comprising such a copolyamide and their uses

The invention relates to a polyamide comprising at least one repeat unit corresponding to the general formulation: X&#xb7;Y in which: X represents a cycloaliphatic diamine and Y represents an aliphatic dicarboxylic acid chosen from dodecanedioic (C) acid, tetradecanedioic (C) acid and hexadecanedioic (C) acid, characterized in that said dicarboxylic acid comprises organic carbon of renewable origin, determined according to Standard ASTM D6866. The invention also relates to a composition comprising this polyamide and also to the use of this polyamide and of such a composition.

Polyamide, composition comprising such a polyamide, and uses thereof

The invention relates to a composition comprising, relative to the total weight of the composition: The invention also relates to the process for preparing this composition and its use.

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Bernay, France

Benjamin Saillard