Process for the crystallization of polyester resins
AssigneeSinco Engineering S.p.A.
InventorsHussain Ali Kashif Al Ghatta, Dario Giordano
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Abstract
Aromatic polyester resins are continuously crystallized in a fluid bed crystallizer, where the fluidizing gas (nitrogen) enters at a temperature not lower than 195.degree. C. and the average residence time is higher than 5 minutes.
Claims22
Continuous process for crystallization of polyester resins using fluid bed crystallizers, comprising the step of feeding an amorphous granular polymer to a fluidized whirling bed wherein the temperature of a fluidification inert gas entering the bed is between approximately 195.degree. and 230.degree. C., and the average residence time of the polymer in the bed is higher than 5 min.
Dependencies are inferred from the claim text.