BIODEGRADABLE POLYESTER POLYMER AND METHOD FOR PRODUCING THE SAME BY USING COMPRESSED GAS

摘要

PURPOSE: A method for producing a biodegradable polyester polymer in a particulate form, is provided to simplify a conventional complicated process by excluding a milling process or use of any special device, and prevent discharge of hazardous solvents to environment. CONSTITUTION: The method for producing a biodegradable polyester polymer in a particulate form comprises the steps of: charging at least one cyclic monomer into a high pressure reactor; adding an organometallic or acid catalyst and an initiator; injecting compressed gas as a solvent, selected from the group consisting of HFC-23, HFC-32, HFC-152a, HFC-143a, HFC-134a, HFC-125, HFC-227ea, HFC-236fa, HFC-245fa, HFC-254cb, SF6, HFC-4-10-mee, C-318(perfluoro cyclobutane), HCFC-22, HCFC-1416, HCFC-1426, HCFC-225ca/cb, dimethyl ether, N2O, propane, butane, a mixture thereof and a mixture further comprising CO2 and the above mixture, into the reactor; and carrying out solution polymerization.