Cross-linking hardenable resin composition, metal laminates thereof and metal surface processing method therewith

Claim 1

A cross-linking hardenable resin composition including a mixture of: a) 45 to 75 parts by weight of binder resin comprising thermoplastic resin A and thermoplastic resin B, where thermoplastic resin A and thermoplastic resin B each have a weight averaged molecular weight ranging from 75,000 to 200,000, and the ratio by weight of thermoplastic resin A to thermoplastic resin B is in the range of 1:9 to 9:1; b) 25 to 55 parts by weight of cross-linking monomer, where each molecule of cross-linking monomer includes at least 2 carbon-carbon double bonds; and c) 0 to 10 parts by weight of photopolymerization initiator, such that when the amount of each of said binder resin, cross-linking monomer and photopolymerization initiator making up said mixture is expressed in terms of parts by weight of said mixture, the total thereof equals 100; and such that said thermoplastic resin A in said binder resin has a glass transition temperature (T g ) measured by differential scanning calorimetry (DSC) in the range of 66 to 88° C., and is co-polymerized with a mixture of monomers comprising: i) 15 to 35 % by weight thereof of first polymerizable substance, said first polymerizable substance in turn made up of at least one type of chemical compound consisting of α, β-unsaturated, carboxyl group possessing monomer having 3 to 15 carbon atoms per monomer molecule; ii) 10 to 55 % by weight thereof of second polymerizable substance, said second polymerizable substance being at least one type of chemical compound selected from the group of chemical compounds comprising 1 to 8 carbon atom alkyl group possessing alkyl acrylate compounds, and 2 to 8 carbon atom hydroxyalkyl group possessing hydroxyalkyl acrylate compounds; iii) 10 to 75 % by weight thereof of third polymerizable substance, said third polymerizable substance being at least one type of chemical compound selected from the group of chemical compounds comprising 1 to 8 carbon atom alkyl group possessing alkyl methacrylate compounds, and 2 to 8 carbon atom hydroxyalkyl group possessing hydroxyalkyl methacrylate compounds; and iv) 0 to 45 % by weight thereof of fourth polymerizable substance, said fourth polymerizable substance being at least one type of chemical compound selected from the group of chemical compounds comprising styrene compounds and ring substituted styrene compounds, where styrene compounds are those described by general chemical structure diagram I below: ##STR7## where R 1 represents a hydrogen atom, halogen atom, or an alkyl group having 1 to 6 carbon atoms; and such that thermoplastic resin B in said binder resin has a T g as measured by DSC ranging from 92 to 120° C., and is co-polymerized with a mixture of monomers comprising: v) 15 to 35 % by weight thereof of first polymerizable substance, said first polymerizable substance in turn made up of at least one type of chemical compound consisting of α, β-unsaturated, carboxyl group possessing monomer having 3 to 15 carbon atoms per monomer molecule; vi) 5 to 30 % by weight thereof of second polymerizable substance, said second polymerizable substance being at least one type of chemical compound selected from the group of chemical compounds comprising 1 to 8 carbon atom alkyl group possessing alkyl acrylate compounds, and 2 to 8 carbon atom hydroxyalkyl group possessing hydroxyalkyl acrylate compounds; vii) 10 to 80 % by weight thereof of third polymerizable substance, said third polymerizable substance being at least one type of chemical compound selected from the group of chemical compounds comprising 1 to 8 carbon atom alkyl group possessing alkyl methacrylate compounds, and 2 to 8 carbon atom hydroxyalkyl group possessing hydroxyalkyl methacrylate compounds; and viii) 0 to 45 % by weight thereof of fourth polymerizable substance, said fourth polymerizable substance being at least one type of chemical compound selected from the group of chemical compounds comprising styrene compounds and ring substituted styrene compounds, where styrene compounds are those compounds described by general chemical structure diagram II below: ##STR8## where R 2 represents a hydrogen atom, halogen atom, or an alkyl group having 1 to 6 carbon atoms.