Process for treating polymers containing residual catalyst

C - Chemistry – Metallurgy – 08 – G

Patent

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Details

C08G 63/91 (2006.01) C08G 63/08 (2006.01) C08G 63/85 (2006.01) G01N 21/25 (2006.01)

Patent

CA 2730465

Process for thermally stabilizing a polymer containing residues of a Sn(II), Sb(III), Pb(II), Bi(III), Fe(II), Ti(II), Ti(III), Mn(II), Mn(III), or Ge(II)-containing catalyst by treating the polymer at a temperature above its melting temperature with a peroxide selected from the group consisting of ketone peroxides, hydroperoxides, peracids, hydrogen peroxide, and mixtures thereof, wherein said peroxide is used in an amount less than 0.2 wt% based on the weight of the polymer and wherein the molar ratio of peroxy functionalities from said peroxide (p) to metal (M) ranges from 1 to 100; said metal (M) being selected from the group consisting of Sn(II), Sb(III), Pb(II), Bi(III), Fe(II), Ti(II), Ti(III), Mn(II), Mn(III), and Ge(II). The invention further relates to a method for determining the metal residue content of a polymer.

La présente invention concerne un procédé destiné à stabiliser thermiquement un polymère contenant des résidus d'un catalyseur contenant du Sn(II), Sb(III), Pb(II), Bi(III), Fe(II), Ti(II), Ti(III), Mn(II), Mn(III), ou Ge(II) en traitant le polymère à une température supérieure à sa température de fusion avec un peroxyde choisi dans le groupe comprenant des peroxydes de cétones, des hydroperoxydes, des peracides, du peroxyde dhydrogène, et des mélanges de ceux-ci, ledit peroxyde étant utilisé dans une quantité inférieure à 0,2 % en poids en se basant sur le poids du polymère et le rapport molaire des fonctionnalités peroxy provenant dudit peroxyde (p) sur le métal (M) étant dans la plage allant de 1 à 100 ; ledit métal (M) étant choisi dans le groupe comprenant les Sn(II), Sb(III), Pb(II), Bi(III), Fe(II), Ti(II), Ti(III), Mn(II), Mn(III), et Ge(II). L'invention concerne en outre un procédé pour déterminer la teneur en résidu métallique d'un polymère.

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