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Encapsulated bleaches and methods for their preparation

  • US 4,136,052 A
  • Filed: 10/14/1977
  • Issued: 01/23/1979
  • Est. Priority Date: 08/25/1976
  • Status: Expired due to Term
First Claim
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1. A granulated active chlorine bleaching agent encapsulated with a coating comprising:

  • (a) about 15 to about 25% of the total encapsulate weight of a first coating on said agent consisting essentially of a major proportion of a substantially saturated fatty acid being substantially non-reactive with said agent and having a melting point range of about 85°

    F. to about 135°

    F. and a plasticizing amount of a microcrystalline wax having a melting point range of about 125°

    F. to about 210°

    F.; and

    (b) about 30% to about 40% of the total encapsulate weight of a second coating on said first coating, said second coating consisting essentially of a major proportion of a fatty acid, a sufficient amount of said microcrystalline wax to plasticize said second coating and about 5 to about 20% of the total encapsulate weight of a polyoxyethylene-polyoxypropylene copolymer having at least about 65% by weight of polyoxyethylene and having a molecular weight of about 8000 to about 16,500.

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