Patent ID: 8173171
Filing Date: 2012-05-08
Classification: A61K,A61L,A61P

Abstract:
1. A method for preparing a hydrogel microparticle composition, comprising: preparing a dispersion comprising 1 part by weight of N-isopropyl acrylamide, about 0.1-0.5 part by weight of chitosan, about 0.03-0.05 part by weight of N,N′-methylene bisacrylamide, about 0.1-0.5 part by weight of glacial acetic acid, and about 20-40 parts by weight of water; adding about 0.01-0.3 part by weight of an anionic initiator into the dispersion and allowing the dispersion to undergo a polymerization reaction at a temperature of about 10-100° C. for about 1 to 5 hours, thereby producing a plurality of hydrogel microparticles dispersed in the water to form the hydrogel microparticle composition.