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Title:
WATER-BASED INK
Document Type and Number:
WIPO Patent Application WO/2019/131131
Kind Code:
A1
Abstract:
The present invention pertains to a water-based ink comprising a pigment (A), water-soluble organic solvents (C), surfactants (D) and water, wherein: the water content is 40-65 mass% inclusive; the boiling point of the water-soluble organic solvents (C) is 230°C or lower and the content of a high-boiling organic solvent having a boiling point of 250°C or higher is not more than 4 mass% relative to the ink; the surfactants (D) comprise a silicone-based surfactant (d-1) and an acetylene glycol-based surfactant (d-2); and the following requirements 1 and 2 are satisfied. The water-based ink according to the present invention can form completely round ink dots and exhibits excellent solid filling properties even on a low liquid-absorbing recording medium so that a recorded material having an excellent image quality and a high scratch resistance can be obtained. Requirement 1: [content of component (d-1)/content of component (C)]×100 being 0.15-4. Requirement 2: [content of component (d-2)/content of component (C)]×100 being 0.35-1.65.

Inventors:
KURODA, Azusa (1334 Minato, Wakayama-sh, Wakayama 80, 〒6408580, JP)
MATSUMOTO, Yuta (1334 Minato, Wakayama-sh, Wakayama 80, 〒6408580, JP)
Application Number:
JP2018/045691
Publication Date:
July 04, 2019
Filing Date:
December 12, 2018
Export Citation:
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Assignee:
KAO CORPORATION (14-10, Nihonbashi Kayabacho 1-chome Chuo-k, Tokyo 10, 〒1038210, JP)
International Classes:
C09D11/38; B41J2/01; C09D11/322; B41M5/00
Domestic Patent References:
WO2017217540A12017-12-21
WO2017217544A12017-12-21
WO2017217541A12017-12-21
WO2017213260A12017-12-14
Foreign References:
JP2017105159A2017-06-15
JP2016165872A2016-09-15
Attorney, Agent or Firm:
KATAOKA, Makoto et al. (OHTANI PATENT OFFICE, Toranomon ES Bldg. 7F. 25-2, Toranomon 3-chome, Minato-k, Tokyo 01, 〒1050001, JP)
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