Method to increase reactor capacity for polycondensation of poly

Details Method to increase reactor capacity for polycondensation of poly Method to increase reactor capacity for polycondensation of poly

1980-03-27

1981-09-15

Phynes, Lucille M.

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

Synthetic resins

From carboxylic acid or derivative thereof

528272, 528483, 528491, 528496, C08G 6318

Patent

active

042898714

ABSTRACT:
The improvement of passing an inert, preferably vaporizable and condensible, liquid material through or over a polyester molten mass in a polymer reactor to further increase surface area-to-volume ratio and/or lower the partial pressure of vaporous products of condensation so that viscosity of the polymer is increased at a substantially greater rate in the same residence time is taught for the prior art condensation process in a film-forming reactor at temperatures of 275.degree. C. to 300.degree. C., pressures of 0.1 to 760 Torr, and residence times of 0.1 to 6 hours. A polymer having an intrinsic viscosity above 0.65, preferably over 0.7, is produced.

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