COMPOSITION OF BIODEGRADABLE POLYMER MICROPARTICLES WITH HIGH DISPERSIBILITY AND METHOD FOR PREPARING THE SAME

摘要

PURPOSE: A solid composition containing a biodegradable polymer particle is provided to suspend using distilled water or other mainly used water without the use of dilution water including carboxymethylcellulose or mannitol etc. CONSTITUTION: A solid composition contains a biodegradable polymer particle and 'the salt of polylactic acid which have at least one terminal of carboxy group or derivatives thereof'. The weight average molecular weight of the salt of polylactic acid and or derivatives thereof is ranged 500-7,000. A production method of the solid composition containing the biodegradable polymer particle comprises a step that mixes the biodegradable polymer particle into 'the aqueous solution composed of the salt of polylactic acid which have at least one terminal of carboxy group or the derivative of the polylactic acid'; and a step that freezes and dries the resulted mixture.