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US 5,492,960 AGranted
Method of making polymeric particles
AssigneeEastman Kodak Company
InventorsJohn L. Muehlbauer, Dennis E. Smith, Thomas H. Whitesides
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AssigneeEastman Kodak Company
InventorsJohn L. Muehlbauer, Dennis E. Smith, Thomas H. Whitesides
Estimating the term…
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.
A method of making polymeric particles of from 1.0 to less than 20 micrometer which comprises forming at atmospheric pressure droplets of an ethylenically unsaturated monomer, the monomer being liquid or solid 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 to less than 20 micrometer, and polymerizing the ethylenically unsaturated monomer.
Dependencies are inferred from the claim text.