Arkema France

Bernard Pees

Jean-Luc Dubois

Jean-Jacques Flat

Mathieu Sabard

Dominique Jousset

Jean-François Devaux

Stéphanie Lebrun

Ornella Zovi

Maliha Khusrawy

Bernard Jacques

Philippe Annoot

Bernard Berthe

Jean-Jacues Flat

Michaël Werth

A process for synthesizing a product of formula Br&#x2014;(CH)&#x2014;R by hydrobromination, by reacting: a reagent of formula (I) R1-CH&#x2550;CH&#x2014;R2 in which R1 and R2, identical or different, are chosen from H or an alkyl radical comprising 1 to 30 carbon atoms, which is saturated or unsaturated, linear or branched, functionalized or non-functionalized, with a molar excess of HBr relative to the reagent of formula (I), in the presence of a radical initiator, and optionally in the presence of at least one solvent, said process including a step A of mixing at least reagent I and the HBr, each of the latter arriving in the form of a flow of liquid into a mixing device dA.

Hydrobromination method

A polyolefin graft polyamide composition incorporating lamellar nanofillers. Also, a tube, pipe or analogous formed from a multilayer at least one of the layers of which contains this composition. A thermoplastic composition having a polyolefin backbone containing a residue of at least one unsaturated monomer and a plurality of polyamide grafts, and also another component, wherein: the polyamide grafts are attached to the polyolefin backbone by the residue of the unsaturated monomer comprising a function capable of reacting via a condensation reaction with a polyamide having at least one amine end group and/or at least one carboxylic acid end group, the residue of the unsaturated monomer is attached to the backbone by grafting or copolymerization, wherein the other component consists of platy nanofillers, said nanofillers being phyllosilicates and representing from 1% to 6.5% by weight of the composition.

Thermoplastic layer for a cable, pipe, coating or analogous

The invention relates to a process for the ammonolysis of 11-aminoundecanoic acid, carried out under conditions that make it possible to limit secondary reactions that produce impurities, especially secondary amine type reactions, while considerably reducing the reaction time. According to the invention, the process comprises the following steps: i) a step of dispersing 11-bromoundecanoic acid, molten or non-molten, in an aqueous solution of ammonia, and ii) an ammonolysis step comprising the reaction of 11-bromoundecanoic acid with excess ammonia water under conditions whereby the reaction medium is stirred and heated gradually so as to obtain 11-aminoundecanoc acid with total consumption of the 11-bromoundecanoic acid.

Process for the ammonolysis of 11-bromoundecanoic acid

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Allauch, France

Bernard Pees