Process for producing spherical particles of crystalline...

Details Process for producing spherical particles of crystalline... Process for producing spherical particles of crystalline...

C - Chemistry, Metallurgy

08

J

402/187, 402/245

C08J 3/12 (2006.01) C08J 3/09 (2006.01) C08J 3/16 (2006.01) C08J 3/22 (2006.01)

Patent

CA 1153850

Abstract of the Disclosure A process for producing uniformly 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 a water insoluble block or graft copolymer having at least one polymeric component which is soluble in the aprotic liquid and at least one other polymeric component which is insoluble in the aprotic liquid and associates with the crystalline polymer, in a specified manner, cooling the dispersion with agitation until the liquid particles solidify and recovering the particles.

363469

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