SULFURIZATION PREVENTION COATING AGENT

摘要

PROBLEM TO BE SOLVED: To provide a sulfurization prevention coating agent capable of forming a sulfurization prevention film without spending excess labor.SOLUTION: There is provided a sulfurization prevention coating agent obtained by dissolving a graft copolymer having a number average molecular weight of 20000 to 100000 obtained by graft-polymerizing with 4 to 43 parts by mass of a fluorine-containing monomer represented by the general formula (3) a stem polymer obtained by copolymerizing 42 to 72 parts by mass of a methacrylic acid ester represented by the general formula (1) and 14 to 31 parts by mass of a (meth)acrylic acid ester represented by the general formula (2) in one or more kinds of solvents selected from a hydrofluorocarbon having a total carbon number of 4 to 8 and a hydrofluoroether having a total carbon number of 4 to 8, with the amount of the graft copolymer being 1 to 10 mass%.SELECTED DRAWING: None