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Method of producing polymer particles having narrow particle size distribution by the use of a polymeric dispersion stabilizer

  • US 5,061,766 A
  • Filed: 09/18/1989
  • Issued: 10/29/1991
  • Est. Priority Date: 07/06/1984
  • Status: Expired due to Term
First Claim
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1. A method of producing polymer particles having a particle size distribution of ±

  • 25% with respect to each average particle size in an amount of 95 wt. % or more, within the average particle sizes ranging from 1 μ

    m to 100 μ

    m, comprising the steps of;

    (1) adding a polymeric dispersion stabilizer in an amount of 0.1 to 10 wt. % to a hydrophilic organic liquid in which said polymeric dispersion stabilizer is soluble;

    (2) adding thereto at least one vinyl monomer in an amount of not more than 20 times by weight of the amount of said polymeric dispersion stabilizer, which monomer is soluble in said hydrophilic organic liquid, but when polymerized said polymer is swellable or is substantially insoluble in said hydrophilic organic liquid; and

    (3) polymerizing said monomer under the condition that the amount of said vinyl monomer is 200 wt. % or less of said hydrophilic organic liquid.

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