B - Operations – Transporting – 29 – B
Patent
B - Operations, Transporting
29
B
B29B 9/12 (2006.01) B29B 9/16 (2006.01) C08J 3/12 (2006.01) C08J 3/22 (2006.01) C08J 3/24 (2006.01) C08J 3/28 (2006.01) C08L 67/02 (2006.01)
Patent
CA 2585388
The present invention relates to a process for the preparation of discrete particles prepared from a cross-linkable PBT, at least one additive and/or at least one colorant, 5 comprising the steps of mixing together the components, extruding the material, cooling and pelletizing the material, cross-linking the pellets using gamma radiation, electron beam radiation, or heating in an oven, and optionally grinding into particles with an average particle size between 1 and 1000 ~m. The present invention further relates to the use of said cross-linked PBT particles for 10 making a polychromatic article which comprises a transparent or translucent thermoplastic material having said cross-linked PBT particles uniformly disperesed therein.
L'invention concerne un procédé de préparation de particules séparées, à partir d'un PBT réticulé, d'au moins un additif et/ou d'au moins un colorant. Le procédé comporte les étapes consistant à: mélanger les composants, extruder la matière, la refroidir et la former en granules, réticuler les granules à l'aide d'un rayonnement gamma, du rayonnement d'un faisceau électronique ou en les chauffant dans un four, et éventuellement broyer les granules pour former des particules dont la dimension moyenne est comprise entre 1 et 1000 µm. L'invention concerne aussi l'utilisation des particules de PBT réticulé pour fabriquer un article polychromatique qui comprend une matière thermoplastique transparente ou translucide dans laquelle lesdites particules sont dispersées uniformément.
Clariant Finance (bvi) Limited
Kirby Eades Gale Baker
LandOfFree
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