Process for the production of polypropylene powders

Details Process for the production of polypropylene powders Process for the production of polypropylene powders

1983-12-22

1985-04-09

Schofer, Joseph L.

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

Synthetic resins

Treating polymer containing material or treating a solid...

528491, 528495, 528496, 528502, 528503, C08F 600, C08G 0000, C08J 300

Patent

active

045103054

ABSTRACT:
Polypropylene powder is produced by dissolving polypropylene in a solvent mixture at an elevated temperature, cooling the solution to below about 80.degree. while maintaining it in quiescent condition for precipitation of the polypropylene as particles which are composed of polypropylene grains, separating the precipitate, drying, and subjecting the dry particles to mechanical comminution.

REFERENCES:
patent: 2870113 (1959-01-01), Jones
patent: 3008946 (1961-11-01), Rhodes et al.
patent: 3154530 (1964-10-01), Mullen
patent: 3971749 (1976-07-01), Blunt

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