Patent ID: 11965105
Assignee: KAO CORPORATION
Field: Basic materials chemistry (Chemistry)
Classification: CPC C  B | IPC B  C

Claim 0:
1. A metal fine particle-containing ink, comprising:
metal fine particles (a) dispersed therein with a polymer dispersant B,
a low-molecular weight carboxylic acid C, and
an aqueous solvent D,
wherein:
the polymer dispersant B comprises a constitutional unit derived from an acid group-containing monomer (b-1);
a content of the low-molecular weight carboxylic acid C in the ink is not less than 1% by mass and not more than 15% by mass;
a boiling point (C) of the low-molecular weight carboxylic acid C and a boiling point (D) of the aqueous solvent D satisfy the following relational formula (1); and
an acid dissociation exponent pKa (C) of the low-molecular weight carboxylic acid C and an acid dissociation exponent pKa (B) of an acid group in the polymer dispersant B satisfy the following relational formula (II),

boiling point (C)>boiling point (D)   (I), and

pKa (C)<pKa (B)   (II).