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Stable black nano-water dispersible pigment dispersion

A technology of water-based pigments and black pigments, which is applied in the field of pigment dispersants, and can solve problems such as the stability evaluation of black nano-scale water-based pigment dispersions.

Inactive Publication Date: 2009-07-29
天津兆阳纳米科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Chinese patent CN 1803945A reports that the black pigment is sand-milled and dispersed using the dispersant Solsperse 20000 to prepare a black nano water-based pigment dispersion. Related to the stability evaluation of the black nano water-based pigment dispersion

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] With 8 parts of black pigment MA-7 of Mitsubishi Chemical Corporation, 9.2 parts of dispersant Solsperse 44000 of Lubrizol Company, its active ingredient content is 50%, 0.2 part of bactericide of Clariant Company Nipacide BIT-20 and 82.6 parts of deionized water were mixed with a high-speed shear mixer for 1 hour to obtain a shear dispersion, and then 300 g of the shear dispersion was ground in a 0.14 L grinder for 1 hour to obtain an aqueous Pigment dispersion. The ratio of pigment to dispersant is 1.74:1. The prepared water-based pigment dispersion was subjected to a stability test at room temperature for one month.

Embodiment 2

[0042]8 parts of carbon black MA-7 of Mitsubishi Chemical Corporation, 19.2 parts of dispersant Borchi Gen SN 95 of LANXESS Corporation, 0.2 part of fungicide Nipacide BIT-20 of Clariant Company and 72.6 parts of deionized water were mixed with a high-speed shear mixer for 1 hour to obtain a shear dispersion, and then 300 g of the shear dispersion was ground in a 0.14 L grinder for 1 hour to obtain an aqueous pigment dispersion. The ratio of pigment to dispersant is 1.67:1. The prepared water-based pigment dispersion was subjected to a stability test at room temperature for one month.

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Abstract

The invention relates to stable black nano water dispersible pigment dispersion liquid and a preparation method thereof. The black nano water dispersible pigment dispersion liquid is characterized by consisting of black pigment C.I.P.B.7, polyurethanes dispersant, bactericide and de-ionized water; wherein, the proportion between the active ingredients which are the black pigment and the dispersant is preferentially within the range of 1.1-1.8. The preparation method comprises the steps: the dispersant and the de-ionized water are mixed in a container to be stirred and then added with the black pigment; the mixed solution is cut for 0.5-8h by a high speed shearing machine and then is ground and dispersed in a circulating way; granularity detection is carried out every 15min until the grain diameter of the dispersion liquid reaches the requirement. The invention has the advantages that the water dispersible pigment dispersion liquid has good dispersibility and storage stability; black pigment cluster is mechanically shattered to be smaller, so that the dispersant can be anchored and fixed on the pigment granules, thus preventing the pigment granules agglomerating together. The stability of the prepared pigment dispersion liquid is enhanced.

Description

(1) Technical field: [0001] The invention relates to a pigment dispersant, in particular to a stable black nano water-based pigment dispersion used in the field of inkjet and a preparation method thereof. (two) background technology: [0002] At present, black water-based pigment inks prepared with black pigments account for a large market share of inkjet printing inks. Generally, black water-based pigment inks are used for text printing, because black water-based pigment inks print text documents even if there is water on the printing surface, and the ink is almost invisible. It will stain the paper; at the same time, the text documents printed with black pigment ink have strong light resistance and are not easy to fade, so they can be stored for a long time; and because the black pigment particles in the ink stay on the surface of the paper and will not seep through the paper, double-sided printing can be realized, saving money. printing costs. In the past, black dye ink ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D17/00C09D11/02G01N15/02
Inventor 石金永
Owner 天津兆阳纳米科技有限公司
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