Arkema France

Stéphanie Lebrun

Guillaume Le

Bernard Pees

Frédéric Mandon

Romain Lenoir

Salomé Gravelat

The present invention relates to esters of at least one polyol and of a mixture of fatty acids comprising at least one C-Csaturated fatty acid and at least one C-Cunsaturated fatty acid.

Lubricating base oil synthesized from biosourced polyol and fatty acids esters

A method of manufacturing an electrical device includes providing a composition comprising a mixture of vegetable oil fatty acid esters as a dielectric fluid in an electrical apparatus. The mixture of castor oil fatty acid methyl esters can contain the methyl stearate in a mass content of 1 to 20% to total amount of the mixture, the methyl oleate in a mass content of 1 to 90% to total amount of the mixture, the methyl linoleate in a mass content of 1 to 80% to total amount of the mixture, the methyl palmitate in a mass content of 1 to 50% to total amount of the mixture, the methyl ricinoleate in a mass content of 0 to 4% to total amount of the mixture, and the 10-undecylenic acid in a mass content of 0 to 1%.

Dielectric fluid comprising fatty acid esters

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.

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Nassandres, France

Stéphanie Lebrun