Polytrimethylene terephthalate resins with improved properties

Details Polytrimethylene terephthalate resins with improved properties Polytrimethylene terephthalate resins with improved properties

C - Chemistry, Metallurgy

08

J

C08J 3/20 (2006.01) C08K 5/16 (2006.01) C08L 67/02 (2006.01)

Patent

CA 2476998

A composition comprising Polytrimethylene terephthalate (PTT) with a reduced emission of acrolein is obtained by contacting Polytrimethylene terephthalate (PTT) resin with an effective amount of a melt unstable, organic nitrogen- containing stabilizing compound. Such PTT resin has an acrolein formation rate at 280~ C of less than 15 ppm/minute. Preferably the residual acrolein content of the PTT resin is less than 5 ppm. Preferred additive compounds include amines, amino acids, amidines, urea and other N-compounds. The additive compounds are added to the polymer in molten state and/or to the resin, which is then processed to fibers, filaments, non-wovens, films and/or mouldings.

L'invention concerne une composition comprenant du polytriméthylène téréphtalate (PTT) à émission réduite d'acroléine, obtenue par la mise en contact de la résine de polytriméthylène téréphtalate (PTT) avec une quantité efficace d'un composé de stabilisation, fluide instable, contenant de l'azote organique. Ladite résine PTT présente un taux de formation d'acroléine à 280·C inférieur à 15 ppm/minute. De préférence, le contenu résiduel d'acroléine est inférieur à 5 ppm. Les composés additifs préférés comprennent des amines, des aminoacides, des amidines, de l'urée et d'autres n-composés. Les composés additifs sont ajoutés au polymère à l'état fondu, et/ou à la résine qui est alors transformée en fibres, filaments, non tissés, films et/ou moulages.

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