Process for the preparation of a melamine based flame...

Details Process for the preparation of a melamine based flame... Process for the preparation of a melamine based flame...

C - Chemistry, Metallurgy

07

F

C07F 9/02 (2006.01) C07F 9/6574 (2006.01) C08K 5/3492 (2006.01) C09K 21/12 (2006.01)

Patent

CA 2507772

The invention relates to a process for the preparation of a melamine based flame retardant by a reaction of a melamine comprising compound and a polyol in a molar ratio between 1.0 : 1 and 4.0 : 1, whereby the reaction is performed in an extruder equipped with a degassing means, at a temperature between 200 and 300~C. Furthermore the invention relates to a melamine based flame retardant obtainable by said process and a polymer composition comprising said melamine based flame retardant.

L'invention concerne un procédé de préparation d'un retardateur de flamme à base de mélanine consistant à faire réagir un composé renfermant de la mélanine et un polyol selon un rapport molaire compris entre 1.0 : 1 et 4,0 : 1, la réaction ayant lieu dans une extrudeuse équipée d'un dispositif de dégazage, à une température entre 200 et 300·C. L'invention concerne en outre un retardateur de flamme à base de mélanine obtenu par ledit procédé et une composition polymère contenant le retardateur de flamme à base de mélanine.

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