Modified polyolefin resin composition and method for producing the same

A method for producing a modified polyolefin resin composition, the method comprising:

• polymerizing a polyolefin resin or a chlorinated polyolefin resin and an α,β-unsaturated carboxylic acid derivative having a structure derived from at least one carboxy group, thereby producing a polymer (a);
• and
• modifying a polymer (A) that is the polymer (a) or a chlorinated product (b) thereof with a modification component comprising an alcohol (B) and a monomer (I), thereby producing a modified polyolefin resin composition comprising a modified polyolefin resin (C),
• wherein a residual ratio of the structure derived from at least one carboxy group in the modified polyolefin resin (C) is 50% or more and 80% or less,
• wherein the monomer is represented by formula (1):
• wherein R1 represents a hydrogen atom or a methyl group;
• m represents an integer of 1 to 4;
• R2 represents a divalent organic group;
• and n represents an integer of 0 to 3, and
• wherein the modified polyolefin resin (C) is modified with the monomer (I) in an amount of 2.1 mol or more and 50 mol or less relative to 1 mol of the polymer (A), and
• wherein the amount of the alcohol (B) is 2 mol or more relative to 1 mol of the structure derived from at least one carboxy group contained in the polymer (A).