Modified polymer, composition, coating film, and multilayer body

Abstract

A modified polymer including a main chain containing (a) a fluorine-containing polymer, containing a unit represented by —CHR—, where R is H or a monovalent organic group, and containing a polymerized unit based on tetrafluoroethylene or chlorotrifluoroethylene; and a side chain based on (b) a monomer represented by formula (bl) and/or a monomer represented by formula (b2), the modified polymer obtainable by reacting the fluorine-containing polymer and the monomer(s) in an organic solvent in the presence of a radical polymerization initiator; where (b1) is CH2═C(—X)—C(═O)—Y—Z—Rf (where X is H, methyl group, or halogen; Y is —O— or —NH—; Z is direct bond or divalent organic group; and Rf is a C1-C20 fluoroalkyl group), and where (b) is CH2═C(—R1)—C(═O)—O—Si(—CH3)2—[O—Si(—CH3)2]n—O—Si(—CH3)2—R2 (where R1 is H or methyl group; R2 is H or methyl group; and n is 3 to 200).

Dependencies are inferred from the claim text.