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Microcapsule and process for their production

  • US 4,533,599 A
  • Filed: 03/23/1984
  • Issued: 08/06/1985
  • Est. Priority Date: 03/25/1983
  • Status: Expired due to Fees
First Claim
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1. A process for producing microcapsules containing a hydrophobic material as a core material, the process comprising the steps of dispersing or emulsifying a hydrophobic material in the form of discontinuous microparticles in an acidic aqueous solution containing a partially esterified product of a styrene-maleic anhydride copolymer, the partially esterified product of a styrene-maleic anhydride copolymer being used in a quantity of 2 to 20 parts by weight relative to 100 parts by weight of the hydrophobic material, adding a melamine-formaledhyde precondensate to the dispersion or emulsion obtained, and subjecting the resuting mixture to reaction in an acidic phase with heating to form a shell film on each microparticle.

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