Method of encapsulating biological substances in microspheres
First Claim
1. A method for encapsulating a biological substance in biocompatible microcapsules comprising:
- (a) maintaining a coating-forming liquid film sheet, said sheet comprising a solution comprising a soluble organic polymer dissolved in an organic solvent,(b) causing droplets comprising biological substances in an aqueous medium to pass through said sheet to form microcapsules comprising cores of said droplets coated by said liquid film, and(c) permitting said microcapsules to pass through said sheet so that a portion of said polymer precipitates in the presence of the water in said droplets while evaporating a portion of said solvent to form a continuous permeable polymer coating of sufficient structural integrity so that said microcapsules are self-supporting.
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Accused Products
Abstract
A method for encapsulating a biological substance is biocompatible microcapsules is disclosed, said method comprising:
a) maintaining a coating-forming liquid film sheet comprising a solution of a soluble organic polymer in an organic solvent,
b) causing droplets comprising biological substance is an aqueous medium to pass through said sheet to form microcapsules comprising cores of said droplets coated by said liquid film, and
c) permitting said microcapsules to pass through said sheet so that a portion of said polymer precipitates in the presence of water in said droplets while evaporating a portion of said solvent to form a continuous permeable polymer coating of sufficient structural that said microcapsules are self-supporting.
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Citations
10 Claims
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1. A method for encapsulating a biological substance in biocompatible microcapsules comprising:
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(a) maintaining a coating-forming liquid film sheet, said sheet comprising a solution comprising a soluble organic polymer dissolved in an organic solvent, (b) causing droplets comprising biological substances in an aqueous medium to pass through said sheet to form microcapsules comprising cores of said droplets coated by said liquid film, and (c) permitting said microcapsules to pass through said sheet so that a portion of said polymer precipitates in the presence of the water in said droplets while evaporating a portion of said solvent to form a continuous permeable polymer coating of sufficient structural integrity so that said microcapsules are self-supporting. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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Specification