Continuous poly (hydroxy acid) polymerization using a counter-cu

Details Continuous poly (hydroxy acid) polymerization using a counter-cu Continuous poly (hydroxy acid) polymerization using a counter-cu

1993-01-21

1995-05-30

Kight, III, John

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

Synthetic resins

From carboxylic acid or derivative thereof

526 64, C08G 6308

Patent

active

054202353

ABSTRACT:
This invention relates to an improved process for continuously producing catalyzed melt polymerization polymers and apparatus for intimately mixing the components during the process. In particular, this invention relates to the continuous catalytic polymerization of poly(hydroxy acids) using a counter-current impeller mixing system.

REFERENCES:
patent: 3839297 (1974-10-01), Wasserman et al.
patent: 4653497 (1987-03-01), Bezwada et al.
patent: 4800219 (1989-01-01), Murdoch et al.
patent: 4844854 (1989-07-01), Kaplan et al.
patent: 4948847 (1990-08-01), Morita et al.
patent: 4952627 (1990-08-01), Morita et al.
patent: 5028667 (1991-07-01), McLain et al.
Krichldorf, H. R. & Sumbel, M., European Polymer Journal, vol. 25, No. 6, pp. 585-591 (1989).

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