C - Chemistry – Metallurgy – 08 – G
Patent
C - Chemistry, Metallurgy
08
G
C08G 63/80 (2006.01) C08G 64/20 (2006.01) C08G 69/06 (2006.01) C08G 69/30 (2006.01) C08G 85/00 (2006.01)
Patent
CA 2359082
This invention concerns a process for the addition of volatile materials like catalysts, stabilizers, plasticizers or comonomers to to prepolymers of e.g. polyesters, polyamides or polycarbonates prior to or during solid state polymerization processes and the subsequent conducting of said solid state polymerization process. In one embodiment a catalyst like toluene sulfonic acid is introduced into the inert gas stream during solid state polymerization of a polyester like polyethylene terephthalate. Alternatively the prepolymer pellets are contacted with a solution of the volatile material before solid state polymerization.
L'invention concerne un procédé consistant à ajouter des matières volatiles tels que catalyseurs, stabilisateurs, plastifiants ou comonomères aux prépolymères de polyesters, de polyamides ou de polycarbonates par exemple, avant ou pendant le processus de polymérisation en phase solide, puis à mener à terme le processus de polymérisation en phase solide. Dans un mode de mise en oeuvre, on introduit un catalyseur tel que l'acide toluène-sulfonique dans le courant de gaz inerte pendant la polymérisation en phase solide d'un polyester tel que le polyéthylène téréphtalate. Dans un autre mode de mise en oeuvre on fait entrer en contact les pastilles de prépolymère avec la matière volatile en solution avant la polymérisation en phase solide.
Bennett Jones Llp
E.i. Du Pont de Nemours And Company
Invista Technologies S.a.r.l.
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