Preparation of a polymer solution

Details Preparation of a polymer solution Preparation of a polymer solution

1996-12-05

1998-07-21

Silbaugh, Jan H.

Plastic and nonmetallic article shaping or treating: processes

With step of cooling to a temperature of zero degrees c. or...

10616801, 264187, 264207, 264343, B29C 4700

Patent

active

057831211

ABSTRACT:
A preparation of a polymer solution comprising the steps of: mixing a polymer with a solvent to swell the polymer in the solvent; cooling the swelled mixture to a temperature of -100.degree. to -10.degree. C.; and then warming the cooled mixture to a temperature of 0.degree. to 120.degree. C. to dissolve the polymer in the solvent. The swelled mixture is cooled at a rate of faster than 1.degree. C. per minute, or the cooled mixture is warmed at a rate of faster than 1.degree. C. per minute. Apparatuses for the preparation of a polymer solution are also disclosed.

REFERENCES:
J.M.G. Cowie et al., report in Makromol., The Dissolution and Stability of Cellulose . . . , 143 (1971) pp. 105-114.
K. Kamide et al., Textile Machinery Society, Dry Spinning of Cellulose Triacetate Filament Yarns . . . , vol. 34, (1981) pp. 57-61.

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