Method for manufacture of olefin polymer fibrils

Details Method for manufacture of olefin polymer fibrils Method for manufacture of olefin polymer fibrils

1978-08-28

1980-01-01

Levin, Stanford M.

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

Synthetic resins

Treating polymer containing material or treating a solid...

260 336PQ, 260 338UA, 264 9, 264 69, C08F 606

Patent

active

041817940

ABSTRACT:
A process for preparing olefin polymer fibrils is disclosed. A high molecular weight ethylene polymer is dissolved in methylene chloride in a first zone that is heated to develop a superatmospheric pressure. The polymer solution is fed to a second zone which is maintained at atmospheric pressure. The polymer solution is discharged into vigorously stirred isopropanol to form fibrils. Polymer solvent is distilled from the resulting slurry. The fibrils are refined in the isopropanol slurry. The polymer solvent and the isopropanol are recycled to the process.

REFERENCES:
patent: 2988782 (1961-06-01), Parrish et al.
patent: 3743272 (1973-07-01), Nowotny et al.
patent: 4013751 (1977-03-01), Davis et al.

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