Precoated metal sheet excellent in conductivity and corrosion resistance

摘要

A precoated metal sheet excellent in conductivity and corrosion resistance and able to be inexpensively produced is provided. The present invention is a conductive, corrosion resistant precoated metal sheet comprising a metal sheet on at least one surface of which is formed a coating film (α) which contains an organic resin (A) and non-oxide ceramic particles (B) with a 25° C. electrical resistivity of 0.1×10−6 to 185×10−6 Ωcm selected from borides, carbides, nitrides, and silicides, a volume ratio of the organic resin (A) and the non-oxide ceramic particles (B) in the coating film (a) at 25° C. being 90:10 to 99.9:0.1, the organic resin (A) including a derivative (A2) of a resin (A1) which includes at least one type of functional group selected from a carboxyl group and sulfonic acid group in a structure of the resin (A1).

主权项

1. A conductive, corrosion resistant precoated metal sheet comprising a metal sheet, on at least one surface of which is formed a coating film (α) which contains an organic resin (A) and non-oxide ceramic particles (B) with a 25° C. electrical resistivity of 0.1×10−6 to 185×10−6 Ωcm selected from borides, nitrides, and silicides,
a volume ratio of the organic resin (A) and the non-oxide ceramic particles (B) in said coating film (α) at 25° C. being 90:10 to 99.9:0.1, said organic resin (A) including a derivative (A2) of a resin (A1) which includes at least one type of functional group selected from a carboxyl group and sulfonic acid group in a structure of the resin (A1), wherein said derivative (A2) of the resin (A1) is a resin (A2Si) of the following general formula (I): wherein “A1” represents a resin (A1) “Z—” represents a C1 to C9, N0 to N2, O0 to O2 hydrocarbon chain, and the notation “A1˜Z” represents a covalent bond of “A1” and “Z” through functional groups of the two; and wherein “—O—” is an ether bond, “—OH” is a hydroxyl group, and “—X” is a C1 to C3 hydrolysable alkoxy group, hydrolysable halogen group, or hydrolysable acetoxy group, “—R” is a C1 to C3 alkyl group, “a”, “b”, “c”, and “d,” which represent the numbers of substituents, are all integers of 0 to 3, and a+b+c+d=3.