Patent ID: 11891533
Assignee: KAO CORPORATION
Field: Basic materials chemistry (Chemistry)
Classification: CPC C  B | IPC B  C

Claim 18:
19. A metal fine particle-containing ink comprising metal fine particles (a) dispersed therein with a polymer B, wherein:
the ink further comprises a solvent S;
a difference ΔSP (|SP(S)−SP(B)|) between solubility parameters of the solvent S and the polymer B is not more than 1.5 (cal/cm3)0.5, wherein SP(S) and SP(B) are solubility parameters of the solvent S and the polymer B, respectively, as measured by a Fedors method;
the SP(B) is not less than 9.5 (cal/cm3)0.5 and not more than 10.5 (cal/cm3)0.5;
the SP(S) is not less than 8.5 (cal/cm3)0.5 and not more than 11.5 (cal/cm3)0.5;
the metal fine particle-containing ink comprises a dihydric alcohol C, represented by the following general formula (1), and an organic solvent D, as the solvent S:, wherein R1 and R2 are respectively a hydrogen atom or a hydrocarbon group having not less than 1 and not more than 3 carbon atoms; R3 is at least one alkylene group selected from the group consisting of an ethylene group and a propylene group; and n is an integer of not less than 0 and not more than 30, with the proviso that in the general formula (1), when R1 and R2 are both a hydrogen atom, R3 comprises at least a propylene group, and n is not less than 1;
the organic solvent D comprises at least one solvent selected from the group consisting of acetone, methyl ethyl ketone, tetrahydrofuran and ethyl acetate; and
the polymer B is a vinyl polymer comprising a constitutional unit derived from a monomer (b-1) comprising a polyalkylene glycol segment and a constitutional unit derived from a monomer (b-2) comprising a carboxy group.