Process for producing spherical particles or crystalline polymer

Details Process for producing spherical particles or crystalline polymer Process for producing spherical particles or crystalline polymer

1979-12-26

1981-03-03

Ziegler, J.

Radiation imagery chemistry: process, composition, or product th

Electric or magnetic imagery, e.g., xerography,...

Process of making developer composition

260 37R, 260 37M, 260 37N, 260 40R, 260 4214, 260 4216, 260 4222, 430109, 525176, 525183, C08L 6706, C08L 7700, G03G 900

Patent

active

042542073

ABSTRACT:
A process for producing uniformly small spherical particles of crystalline, normally solid condensation polymers is described. The process of this invention further provides high yields of hydrophobic, non-agglomerating particles in a useful size range directly, without the need for subsequent processing, and is carried out by forming a dispersion of small liquid particles of the crystalline polymer in certain aprotic liquids containing 0.1 to 20% by weight of the polymer of an acid-modified polymer of propylene in a specified manner, cooling the dispersion with agitation until the liquid particles solidify and recovering the particles.

REFERENCES:
patent: 3435093 (1969-03-01), Cope
patent: 3586654 (1971-06-01), Lerman et al.
patent: 3669922 (1972-06-01), Bartsch et al.
patent: 3674736 (1972-07-01), Lerman et al.
patent: 3910846 (1975-10-01), Azar et al.

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