PROCESS FOR THE PREPARATION OF POLYMER POWDERS OF CONTROLLED PARTICLE SHAPE,SIZE AND SIZE DISTRIBUTION AND PRODUCT
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Abstract
POLYMER POWDERS ARE PREPARED BY CONTROLLED MELTING, HEATING AND AGITATION OF A LIQUID DISPERSION OF POLYMER PARTICLES IN THE PRESENCE OF A SURFACTANT. POWDERS CAN THUS BE OBTAINED COMPOSED OF SPERICAL PARTICLES OF CONTROLLED AVERAGE SIZE AND SIZE DISTRIBUTION, THE SAME, LARGER OR SMALLER THAN THE STARTING PARTICLES. PARTICLES CAN ALSO BE PRODUCED FROM MOLTEN POLYMER MASSES, IN A LIQUID WITH ADDED SURFACTANT AND THEN MODIFIED IN SHAPE, SIZE AND SIZE DISTRIBUTION BY ADDITIONAL CONTROLLED HEATING AND AGITATION OF THE LIQUID DISPERSION.
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