METHODS FOR PREPARING AND COAGULATING GRAFT RUBBER LATEX HAVING HIGH THERMAL STABILITY

摘要

A method for preparing a graft rubber latex, a method for coagulating a graft rubber latex, and a method for preparing a graft rubber resin composition by using the graft rubber latex coagulated by the method are provided to improve thermal stability even without the injection of additional a heat stabilizer. A method for preparing a graft rubber latex comprises the step of polymerizing a monomer mixture comprising at least one selected from the group consisting of a rubber latex, an aromatic vinyl compound, a vinyl cyano compound and acrylate compound, wherein a first oil-soluble peroxide-based polymerization initiator is applied when the conversion rate of polymerization of the monomer mixture is within 50 %, and a second oil-soluble peroxide-based polymerization initiator is applied when the conversion rate of polymerization exceeds 50 %.