Process for the batchwise preparation of polylaurolactam

Details Process for the batchwise preparation of polylaurolactam Process for the batchwise preparation of polylaurolactam

1996-06-10

1997-12-09

Seidleck, James J.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

From carboxylic acid or derivative thereof

528310, 528315, 528323, 528326, 4284744, C08G 6916

Patent

active

056962274

ABSTRACT:
A process for the batch preparation of polylaurolactam in the melt, involving introducing molten, anhydrous laurolactam at a temperature of up to 280.degree. C. into a pressure-resistant reactor heated externally to a maximum of 290.degree. C.; introducing steam having a temperature in the range from 170.degree. to 280.degree. C. and a pressure in the range from 8 to 64 bar into the laurolactam until the laurolactam is heated under pressure to a temperature in a range from 280.degree. to 290.degree. C., to give a ring opened precondensed product; and, if desired, after release of pressure, polycondensing the ring opened precondensed product.

REFERENCES:
patent: 4077946 (1978-03-01), Enenshtein et al.
patent: 5149758 (1992-09-01), Matthies
patent: 5283315 (1994-02-01), Kawakami et al.
patent: 5362448 (1994-11-01), Kawakami et al.

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