Multi-phase microparticles and method of manufacturing multi-phase microparticles

Multi-phase microparticles and method of manufacturing multi-phase microparticles

  • CN 102,458,640 A
  • Filed: 06/07/2010
  • Published: 05/16/2012
  • Est. Priority Date: 06/05/2009
  • Status: Active Application
First Claim
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1. method of producing heterogeneous particulate, wherein said method comprises:

  • At least three kinds of different polymer are dissolved in the volatile organic solvent to obtain first solution;

    Wherein first solution comprises at least two cloud points;

    Wherein second cloud point is higher than first cloud point;

    Wherein select viscosity and first cloud point and second cloud point of first solution, make that said at least three kinds of different polymer become non-miscible each other when volatile organic solvent evaporates;

    First solution is dispersed in contains in the water continuous phase, wherein contain water continuous phase and comprise surfactant to obtain emulsion;

    WithVolatile organic solvent is evaporated from emulsion;

    Wherein before evaporation at least three kinds of various polymerization things total concentration together described in the emulsion below first cloud point, or more than first cloud point and below second cloud point, or more than second cloud point.

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