Aqueous pigment dispersion liquid, aqueous ink-jet ink, and dry coating
US12065575B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 16, 2021 |
| Grant date | Aug 20, 2024 |
| Priority date | — |
| Expiry date | Sep 16, 2041 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09D11/107
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
An aqueous pigment dispersion for preparing an environmentally conscious aqueous inkjet ink in which a pigment is finely and stably dispersed and which records images having excellent durability, glossiness, color developability, and adhesiveness to various printing substrates. The aqueous pigment dispersion contains a pigment, water, a water-soluble organic solvent, and a polymeric dispersant that disperses the pigment. The polymeric dispersant is a polymer including a constitutional unit (i) derived from (meth)acrylic acid and/or itaconic acid, and a constituent unit (ii) derived from (meth)acrylate derived from biological material, such as ethyl (meth)acrylate, having an acid value of 30 to 250 mgKOH/g, number average molecular weight of 1,000 to 30,000, and a polydispersity index (weight average molecular weight/number average molecular weight) of 2.5 or less. The content of the constituent unit (ii) is 50% by mass or more, and at least part of carboxy groups is neutralized with an alkali.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.