Solid state polymerization of polyester

Details Solid state polymerization of polyester Solid state polymerization of polyester

1984-09-13

1985-07-30

Phynes, Lucille M.

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

Synthetic resins

From carboxylic acid or derivative thereof

528483, C08G 6326

Patent

active

045323194

ABSTRACT:
Polyesters are often polymerized to higher molecular weights in the solid state in the presence of an inert gas stream. The inert gas stream removes volatile reaction products and helps to heat the polyester. It has been found that the amount of inert gas needed to solid state polymerize a polyester can be greatly reduced by pulsing the inert gas through the polyester.

REFERENCES:
patent: 3585259 (1971-06-01), Lefferts et al.
patent: 3586647 (1971-06-01), Kremer
patent: 3634356 (1972-01-01), Tryon
patent: 3718621 (1973-02-01), Wilson
patent: 4374975 (1983-02-01), Duh
patent: 4379912 (1983-04-01), Lu

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