Patent ID: 6562459
Filing Date: 2003-05-13
Classification: A61K,C08J,C08L,Y10T

Abstract:
A method for preparing spherical microparticles comprising at least one water-insoluble polysaccharide, said method comprising the steps of(a) dissolving the at least one water-insoluble polysaccharide in a solvent or solvent mixture, (b) introducing the solution into a precipitant or precipitant mixture to form a polysaccharide-precipitant mixture, and cooling the polysaccharide precipitant mixture, where appropriate, to form microparticles and, (c) removing the microparticles wherein said method comprises selecting the water-insoluble polysaccharide from among branched polyglucans having a degree of branching of greater than zero and not more than 8%, and a mixture of branched polyglucans and linear polysaccharides wherein the proportion of branched polyglucans is not higher than 30% by weight with respect to the combined weight of the polysaccharide and polyglucan.