METHOD FOR PRODUCING GRAFT-MODIFIED POLYPROPYLENE RESIN

摘要

PROBLEM TO BE SOLVED: To provide a method for producing a graft-modified polypropylene resin which reduces a foreign matter generated by a side reaction, can increase a graft amount, and can reduce a defect, in particular, when formed into a film shape.;SOLUTION: A method for producing a graft-modified polypropylene resin includes reacting (a) a polypropylene resin and (b) a radical polymerization initiator in a reaction portion 1 using a twin-screw extruder in which a length of the reaction portion 1 is 30% or more and 65% or less when the whole length of the reaction portion formed of the reaction portion 1 and a reaction portion 2 is 100%, then adding a monomer having a (c) monomer in which an ethylenically double bond and a polar group in the same molecule in a state in which a decomposition rate of (b) the radical polymerization initiator is 20% or more and 70% or less to the resultant substance in the reaction portion 2, and reacting the substances.;SELECTED DRAWING: None;COPYRIGHT: (C)2018,JPO&INPIT