Encapsulated active material system
First Claim
1. A capsule comprising a polymeric membrane surrounding a liquid core wherein said membrane is formed by the interaction of at least one anionic polymer with at least one cationic polymer wherein molecular chains comprising said anionic polymer and said cationic polymer are oriented substantially within said membrane so that said polymers 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 and wherein said cationic polymer forms the inner surface of said membrane adjacent liquid core.
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Abstract
Capsules are formed herein a liquified core while avoiding capsule core gelation by adding drops of a solution of either an anionic polymer composition or a cationic polymer composition to a solution of an ionic polymer of opposite charge. The drops contain an active ingredient such as a cell or microorganism capable of producing a biologically active product or can contain a biological or chemical composition. The interface of the ionic polymers form a permeable membrane surrounding the liquid drops.
139 Citations
8 Claims
- 1. A capsule comprising a polymeric membrane surrounding a liquid core wherein said membrane is formed by the interaction of at least one anionic polymer with at least one cationic polymer wherein molecular chains comprising said anionic polymer and said cationic polymer are oriented substantially within said membrane so that said polymers 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 and wherein said cationic polymer forms the inner surface of said membrane adjacent liquid core.
Specification