Process for the recovery of atactic polymers

Details Process for the recovery of atactic polymers Process for the recovery of atactic polymers

1978-12-26

1980-06-17

Levin, Stanford M.

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

Synthetic resins

Treating polymer containing material or treating a solid...

528494, 528495, 528496, 528497, 528498, C08F 626

Patent

active

042085306

ABSTRACT:
In a process for the recovery of an atactic polymer which comprises heating liquid propylene containing the dissolved atactic polymer at a gauge pressure of 13 to 40 kg/cm.sup.2 in a vaporizer to vaporize the propylene, and separating the atactic polymer from the vaporized propylene thereby recovering the polymer in a molten state, the improvement comprising maintaining the vaporization temperature of propylene at 45.degree. C. to 90.degree. C. and the temperature of a heating medium for the vaporizer at 60.degree. C. to 150.degree. C. According to this process, a long run can be used in the recovery of the atactic polymer.

REFERENCES:
patent: 3644583 (1972-02-01), Scoggin

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