Curing accelerator for oxidatively polymerized unsaturated resin, printing ink, and paint

A curing accelerator for an oxidative polymerization type unsaturated resin, comprising:

• a metal complex (β2) having an anion compound (α) represented by the following structural formula (1-1) or (1-2) as a ligand:
• wherein R1 is any one of a hydroxyl group, an amino group, a nitro group, a nitroso group, a sulfo group, a halogen atom, a hydrocarbon group which may have a substituent, a hydrocarbon oxy group which may have a substituent, and a hydrocarbon oxycarbonyl group which may have a substituent, m is 0 or an integer of 1 to 3, n is 0 or an integer of 1 to 6, and X is any one of a carboxylate group, a hydrogen atom, and a R1 group, wherein
• the metal complex (β2) comprises a metal salt represented by the following general formula (B-1):
• M(X)n (B-1)
• wherein M is manganese or iron as a central metal, X is any one of F−, Cl−, Br−, I−, PF6−, SbF6−, AsF6−, BF4−, B(C6F5)4−, ClO4−, ClO3−, CO2−, ClO−, H2PO4−, H2PO3−, H2PO2−, HCO3−, NO3−, NO2−, (CH3CO)2CH−, RCOO− (wherein R is a hydrocarbon group having 1 to 22 carbon atoms), O2-, S2-, SO42-, SO32-, and CO32-;
• and n is an integer of 1 or more;
• at least one of an imidazole compound (C);
• and
• a benzyl alcohol compound (D).

A curable resin composition comprising an oxidative polymerization type unsaturated resin and a curing accelerator for an oxidative polymerization type unsaturated resin, comprising a metal complex (β2) having an anion compound (α) represented by the following structural formula (1-1) or (1-2) as a ligand:

• wherein R1 is any one of a hydroxyl group, an amino group, a nitro group, a nitroso group, a sulfo group, a halogen atom, a hydrocarbon group which may have a substituent, a hydrocarbon oxy group which may have a substituent, and a hydrocarbon oxycarbonyl group which may have a substituent, m is 0 or an integer of 1 to 3, n is 0 or an integer of 1 to 6, and X is any one of a carboxylate group, a hydrogen atom, and a R1 group, wherein
• the metal complex (β2) comprises a metal salt represented by the following general formula (B-1):
• M(X)n (B-1)
• wherein M is manganese or iron as a central metal, X is any one of F−, Cl−, Br−, I−, PF6−, SbF6−, AsF6−, BF4−, B(C6F5)4−, ClO4−, ClO3−, CO2−, ClO−, H2PO4−, H2PO3−, H2PO2−, HCO3−, NO3−, NO2−, (CH3CO)2CH−, RCOO− (wherein R is a hydrocarbon group having 1 to 22 carbon atoms), O2-, S2-, SO42-, SO32-, and CO32-;
• and n is an integer of 1 or more.

A curable resin composition comprising:

• a curing accelerator for an oxidative polymerization type unsaturated resin, comprising a compound (A) represented by the following structural formula (2-1) or (2-2):
• wherein R1 is any one of a hydroxyl group, an amino group, a nitro group, a nitroso group, a sulfo group, a halogen atom, a hydrocarbon group which may have a substituent, a hydrocarbon oxy group which may have a substituent, and a hydrocarbon oxycarbonyl group which may have a substituent, m is 0 or an integer of 1 to 3, n is 0 or an integer of 1 to 6, R2 is a hydrogen atom or an aliphatic hydrocarbon group, and X is any one of —COOR2 group, a hydrogen atom, and a R1 group, and a metal salt (B) comprising a manganese salt or an iron salt as an essential component;
• and
• at least one oxidative polymerization type unsaturated resin selected from a rosin-modified phenolic resin, an alkyd resin, a petroleum resin, polymerized oil, an unsaturated group-containing urethane resin, and an unsaturated group-containing epoxy resin.