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Process for preparation of microcapsules

  • US 4,622,244 A
  • Filed: 08/23/1984
  • Issued: 11/11/1986
  • Est. Priority Date: 09/04/1979
  • Status: Expired due to Fees
First Claim
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1. In a process for the preparation of microcapsules having a particulate core material encapsulated by a polymeric coating wherein the polymer is first dissolved in a solvent in which the core material is not soluble, the polymer is precipitated by phase separation to encapsulate the core material by the addition of a phase separation agent to the polymer-core material-solvent system to form microcapsules of the core material having walls constituted by the polymer, and the microcapsules are thereafter isolated, the improvement which comprises isolating said microcapsules at a temperature at least as low as -30°

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