Method of making polymeric particles

Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – At least one aryl ring which is part of a fused or bridged...

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524459, 524475, 524800, 524848, 526 89, 526207, C08J 302, C08K 320, C08L 3100, C08F 216

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054929601

ABSTRACT:
A method of making polymeric particles of at least 1.0 micrometer which comprises forming at atmospheric conditions droplets of an ethylenically unsaturated monomer the monomer being liquid at standard conditions of 0.degree. C. and one atmosphere pressure, together with from about 0.01 to about 5 percent by weight, based on the weight of the monomer, of a nonreactive compound in an aqueous medium, the nonreactive compound having a solubility in water less than that of the ethylenically unsaturated monomer, the aqueous medium containing a surfactant or organic hydrophilic colloid, the monomer droplets being formed by using only sufficient energy to achieve a size of 1.0 micrometer or larger, and polymerizing the ethylenically unsaturated monomer.

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