Preparation of dry polycaprolactam granules

Details Preparation of dry polycaprolactam granules Preparation of dry polycaprolactam granules

C - Chemistry, Metallurgy

08

J

402/229

C08J 3/12 (2006.01) C08J 3/00 (2006.01)

Patent

CA 1232397

Abstract of the Disclosure: Dry polycaprolactam gran- ules containing from 8 to 13% by weight of caprolactam and its oligomers are prepared by a method in which a caprolactam melt is extruded, the extrudates are cooled to 100-150°C, left at this temperature until the polycaprolactam has substantially crystallized, and then immediately granulated, and the granules are left in a stream of inert gas, in the absence of molecular oxygen, for from 1 to 4 hours at from 100 to 150°C, and are then cooled.

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