method of manufacturing the oxo-biodegradable polymer master-batch

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The present invention relates to a method for preparing an oxide biodegradable resin master batch capable of improve the moldability of a molded article using a biodegradable resin and accelerating the oxidation and biodegradation processes. A master batch includes polyolefins, biodegradable agent, biodegradation agent, commercializing agent, and decomposition accelerating agent. The biodegradation agent includes metal salt of a carboxylic acid which uses the metal other than rare earth metals and a lubricant. When the master batch is prepared by using an extruder, the biodegradation agent and the decomposition accelerating agent are added through the rear end of the extruder. The present invention maintains the performance of the biodegradation agent and the decomposition accelerating agent without degrading the biodegradation agent and the decomposition accelerating agent in the master bath preparation process, thereby enabling excellent decomposition in the final molded article with adding only a small amount of the oxide biodegradable resin master batch. Accordingly, the present invention is economic and is capable of maintaining the strength of the final molded article while the final molded article is used through enabling the biodegradation process to begin after a predetermined time.COPYRIGHT KIPO 2015