Method of preparing small particles of polypropylene

Details Method of preparing small particles of polypropylene Method of preparing small particles of polypropylene

1975-07-07

1976-07-27

Derrington, James H.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

260 328A, 260 332R, 260 336PQ, 260 338UA, 260 342, 260 4221, 260 4254, 260 937, 260 949GD, 526351, 528502, 528503, C08K 501, C08K 502, C08K 505

Patent

active

039717496

ABSTRACT:
Substantially spherical particles of polypropylene are prepared by precipitating a solution of polymer under quiescent cooling conditions. Solvent can be from any class capable of dissolving polypropylene at elevated temperature, but must satisfy critical conditions relating to dipole moment, hydrogen bonding parameter, and solubility parameter.

REFERENCES:
patent: 2870113 (1959-01-01), Jones
patent: 3119811 (1964-01-01), Haskell
patent: 3218304 (1965-11-01), Rottig
patent: 3245934 (1966-04-01), Krzyszkowski
patent: 3257351 (1966-06-01), Kraus et al.
patent: 3360497 (1967-12-01), Jones
patent: 3475369 (1969-10-01), Blunt

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