C - Chemistry – Metallurgy – 08 – J
Patent
C - Chemistry, Metallurgy
08
J
C08J 3/20 (2006.01) C08J 3/205 (2006.01)
Patent
CA 2621780
A method for adding an additive into a polymer melt, preferably a polyester polymer melt such as polyethylene terephthalate (PET), comprising: a. discharging a polymer melt from a reactor to form a discharged polymer melt stream, and b. solidifying said discharged polymer melt stream, and c. prior to solidification, feeding a portion of the discharged polymer melt stream to a slipstream to form a slipstream polymer melt, and d. feeding an additive into said slipstream polymer melt to form an additive containing slipstream, and e. feeding the additive containing slipstream to a location upstream from the feed location forming said slipstream
La présente invention concerne un procédé d~ajout d~additif à une fonte polymère, de préférence une fonte polymère polyester telle que du téréphtalate de polyéthylène (PET), comprenant les étapes suivantes : a. évacuation d~une fonte polymère à partir d~un réacteur de manière à former un flux de fonte polymère évacuée ; b. solidification dudit flux de fonte polymère évacuée ; c. avant solidification, alimentation d~une partie du flux de fonte polymère évacuée dans un flux glissant de manière à former une fonte polymère à flux glissant ; d. alimentation d~un additif dans ladite fonte polymère à flux glissant de manière à former un flux glissant contenant un additif; e. alimentation dudit flux glissant contenant un additif à un emplacement situé en amont de l~emplacement d~alimentation formant ledit flux glissant.
Debruin Bruce Roger
Venett Kenrick Lyle
Eastman Chemical Company
Gowling Lafleur Henderson Llp
Grupo Petrotemex S.a. de C.v.
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