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Aqueous pigment dispersion and aqueous ink for inkjet recording use

一种水性颜料、分散体的技术，应用在油墨、颜料浆料、应用等方向，能够解决异物大小变小、喷嘴堵塞增加、油墨无法使用等问题，达到喷出稳定性优异、粗大粒子减少的效果

Active Publication Date: 2016-05-25
DIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As the diameter of the nozzle is miniaturized, the size of the allowable foreign matter is also reduced, so the clogging of the nozzle increases, that is, the ink that can be used in the conventional inkjet printer cannot be installed on the newly developed high-resolution inkjet head. Problems with printers using
[0008] The method described in the above-mentioned Patent Document 1 is excellent as a method for producing a water-based ink for inkjet recording, but there is still room for research to provide an ink corresponding to the miniaturization and high integration of the nozzle diameter in recent years.

Method used

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  • Aqueous pigment dispersion and aqueous ink for inkjet recording use
  • Aqueous pigment dispersion and aqueous ink for inkjet recording use
  • Aqueous pigment dispersion and aqueous ink for inkjet recording use

Examples

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Embodiment

[0208] Hereinafter, the present invention will be described in more detail through examples, but the present invention is not limited to the following examples unless the gist thereof is exceeded. In addition, in the following examples, "part" and "%" are mass standards unless otherwise specified.

[0209] (Synthesis example of polymer (A))

Synthetic example 1

[0211] n-Butyllithium (BuLi) as the polymerization initiator and styrene (St) as the first monomer were figure 1 The tubular reactors P1 and P2 are imported into figure 1 In the T-shaped micro-mixer M1 in the living anion polymerization is carried out to form a polymer.

[0212] Next, pass the resulting polymer through figure 1 The tubular reactor R1 in is moved to figure 1 In the T-shaped micro-mixer M2, the growth end of the polymer is used from figure 1 The reaction modifier (1,1-diphenylethylene (DPE)) introduced into the tubular reactor P3 in the tube is captured.

[0213] Next, tert-butyl methacrylate (t-BMA) as the second monomer was figure 1 The shown tubular reactor P4 is introduced into the T-shaped micro-mixer M3, and passed through figure 1 The above-mentioned polymers moving in the tubular reactor R2 undergo continuous living anionic polymerization. Thereafter, the reaction was quenched with methanol to produce a block copolymer (PA-1).

[0214] At this tim...

Synthetic example 2～12

[0220] Polymers (P-2) to (P-12) were produced by adjusting the type and introduction amount of monomers in the same manner as in Synthesis Example 1.

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Abstract

An aqueous pigment dispersion characterized by comprising a polymer (A), a pigment and water, wherein the polymer (A) has an anionic group, has solubility in water of 0.1 g / 100 ml or less, can form fine particles in water when the rate of neutralization of the anionic group with a basic compound is 100%, and has a number average molecular weight falling within the range from 1000 to 6000; and an aqueous ink for inkjet recording use. It is preferred that the polymer (A) is a polymer represented by general formula (1). (In formula (1), A1 represents an organic lithium initiator residue; A2 represents a polymer block of a monomer having an aromatic ring or a heterocyclic ring; A3 represents a polymer block containing an anionic group; n represents an integer of 1 to 5; and B represents an aromatic group or an alkyl group.)

Description

technical field [0001] The present invention relates to an aqueous pigment dispersion and an aqueous ink for inkjet recording using the same. Background technique [0002] Pigment compositions that use pigments as coloring materials can be used in coatings for automobiles and building materials, offset inks, gravure inks, flexographic inks, screen printing inks, etc. Various applications such as the field of printing ink or the field of water-based ink for inkjet recording. [0003] Among them, water-based inks using water as a main solvent have excellent features such as being able to further reduce the risk of fire like solvent inks, and especially for inkjet recording, water-based inks have become mainstream. [0004] The pigment is water-insoluble, and is used as an aqueous pigment dispersion dispersed in an aqueous medium. Therefore, methods for stably dispersing a pigment in an aqueous medium have been studied conventionally. [0005] For example, it is known that i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D17/00B41J2/01B41M5/00C08F297/02C09B67/20C09B67/46C09D11/326C09K23/52
CPCC09D11/326C08F297/02C08F297/026B01J19/0093C09B67/009B01J2219/00867B01J2219/00873B01J2219/00889B01J2219/00894C09D11/106C09D11/322B41J2/01C09D17/00B41J2/165C09D11/107
Inventor 植村由希枝木村利久大地尉夫田中寿计小江信洋佐藤盛绪横山隆二
Owner DIC CORP