Patent ID: 8911762
Filing Date: 2014-12-16
Classification: A61F,A61L

Abstract:
1. A process for preparing a porous composite comprising calcium sulfate and polylactic acid, which consists of the following steps: (a) dehydrating calcium sulfate selected from calcium sulfate dihydrate, calcium sulfate alpha-hemihydrate or calcium sulfate beta-hemihydrate calcium or the mixture thereof to obtain calcium sulfate anhydrate; (b) melting polylactic acid at a high temperature and mixing the melted polylactic acid with calcium sulfate anhydrate to form a calcium-polylactic acid composite; and (c) particulate-leaching the calcium-polylactic acid composite to form a porous composite with interconnected pores; wherein the ratio of polylactic acid to calcium sulfate ranges from about 75%-65% (w/w) to about 25%-35% (w/w) and the pore size of the interconnected pores ranges from 100 to 500 μm.