Process for surface activation and/or devulcanisation of...

C - Chemistry – Metallurgy – 08 – J

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C08J 11/10 (2006.01) B09B 3/00 (2006.01) C08C 19/08 (2006.01) C12N 1/20 (2006.01)

Patent

CA 2521255

Process for surface activation and/or devulcanisation of sulphur-vulcanised rubber particles. In order to break the sulphur bridges and to reduce the sulphur, the rubber particles are treated in a biotechnological manner in a medium with mesophilic anaerobic and/or optionally anaerobic and/or microaerophilic bacteria and/or with one or more enzyme systems of such bacteria. The thus treated, activated rubber particles show improved vulcanisation properties, in comparison with non-treated rubber particles, and permit the production of better quality articles.

Procédé d'activation et/ou de dévulcanisation de la surface de particules de caoutchouc vulcanisées avec du soufre. Afin de rompre le pontage par le soufre et réduire le soufre, les particules de caoutchouc sont traitées par voie biotechnologique dans un milieu avec des bactéries mésophiles anaérobies et/ou facultativement anaérobies et/ou microaérophiles et/ou avec un ou plusieurs systèmes enzymatiques de ces bactéries. En comparaison avec des particules de caoutchouc non traitées, les particules de caoutchouc activé ainsi traitées présentent une meilleure vulcanisation et permettent de produire des articles de plus haute qualité.

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