Patents Assigned to VAIM CO., LTD.
  • Method for preparing polymer microparticles by spray process
    Patent number: 9850341
    Abstract: The present invention relates to a method for preparing polymer microparticles by a spray process, wherein a polymer solution obtained by dissolving a polyester-based polymer in ethylene carbonate (hereinafter, referred to as “EC”), which is a solvent, is sprayed at a low temperature hydrocarbon or alcohol solution, thereby preparing frozen EC/polymer microparticles, the frozen EC/polymer microparticles are dissolved in a salt aqueous solution, thereby dissolving and removing EC, and the residual EC in water is removed by washing.
    Type: Grant
    Filed: February 17, 2014
    Date of Patent: December 26, 2017
    Assignee: VAIM CO., LTD.
    Inventor: Gun Poong Kim