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Process for encapsulation and encapsulated active material system

  • US 4,744,933 A
  • Filed: 08/16/1985
  • Issued: 05/17/1988
  • Est. Priority Date: 02/15/1984
  • Status: Expired due to Term
First Claim
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1. A process for producing a capsule having an aqueous liquid core from ionic polymers while avoiding gelation of the core comprising the steps of:

  • forming an aqueous non-gel liquid droplet from an aqueous solution of a first ionic polymer selected from the group consisting of at least one anionic polymer and at least one cationic polymer, said liquid droplet containing an active material suspended in said droplet; and

    contacting said aqueous non-gel droplet with an aqueous solution of at least one second ionic polymer, said second ionic polymer having an ionic charge opposite from said first ionic polymer whereby said first and second polymers interact with each other and wherein said first ionic polymer and said second ionic polymer are free to react with each other along the entire chain lengths of said polymers where said polymers come into reactive contact with each other to form a membrane encapsulating said non gel droplets and said active material or aqueous liquid core containing said active material, and said encapsulated non gel droplets being suspended in said aqueous solution of said second ionic polymer.

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