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Paper-making colorant and preparation method thereof

A technology of colorants and toners, which is applied in the preparation of paper-making colorants, the preparation of colorants, and the deployment of colorants for paper hue. It can solve the problems of easy yellowing, uneven coloring, and paper color difference, and achieve High retention rate, good affinity, and the effect of improving printing effect

Inactive Publication Date: 2008-04-23
SHANGHAI XINSHENG PIGMENT CHEM
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  • Claims
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AI Technical Summary

Problems solved by technology

[0005] The present invention solves the technical problems of color difference, uneven toning, low oxidation resistance and easy yellowing of paper in the prior art when the paper is toned by common colorants, and provides a papermaking colorant with excellent effect. The preparation method of the above-mentioned papermaking colorant is provided

Method used

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  • Paper-making colorant and preparation method thereof
  • Paper-making colorant and preparation method thereof
  • Paper-making colorant and preparation method thereof

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Embodiment 1-7

[0040] Commercial toner RVL violet contains inorganic salts and metal salts, including phosphorus and molybdate in its structure, so it has good hydrophilicity. However, it swells when making water-based color paste, and then flocs appear. Through a large number of experiments, it is found that this shortcoming can be solved by the method of pretreatment of commercial toner RVL purple, which has good hydrophilicity, that is, first Add 100Kg of toner RVL purple into the container, then add 100Kg of deionized water, beat and stir in the container for 10 minutes, so that the pigment is completely mixed with water, adjust the pH value between 7.2-7.5 with triethanolamine, and then use The high-density non-woven fabric is dehumidified by vacuum to filter out the water and inorganic salts in the pigment. Measure the water content of the pigment cake left on the filter cloth, and control the solid water content to about 50%, so as to facilitate feeding in the next step.

[0041] In ...

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Abstract

This invention discloses a kind of coloring agent, which resolves the technical question of uneven coloring effect by the ordinary coloring agent, the low oxidization which easily turns yellow. It provides a kind of coloring agent for paper making with excellent effect. The present invention also discloses the preparation method for the above-mentioned coloring agent for paper-making. It compresses the composition of constitutional formula (I) RVL coloring agent and 2B blue constitutional formula of coloring agent occupies 11.80 percent to 20.40 percent of the total amount of coloring agent. It's preparation method lies in: The preparation method for preparing the constitutional formula for the two kinds of coloring agents is, add water, dispersant agent, anti-settling agent and anti-ionizer agent into the solid dyeing substance, then stir evenly to achieve solid liquid mixed materials and continuously addressing the above-mentioned materials to reach its size data under 100 percent control 1 mu m, thus the composition materials achieved. Then adjust the two kinds of composition materials to appropriate ratio. The invention can produce high-quality white paper with even coloring application and excellent nimonic effect.

Description

technical field [0001] The invention relates to a colorant, in particular to a colorant used for adjusting the hue of paper in the papermaking process. The invention also relates to a preparation method of the colorant, in particular, the invention relates to a preparation method of the papermaking colorant. Background technique [0002] Colorants are widely used in papermaking, coatings and other fields, especially in the papermaking industry. The requirements for paper hue in the process of raw pulp, deinked pulp, cultural paper, newsprint, coated papermaking, and paper production are constantly increasing, especially for printing paper and Coated printing paper has high requirements for hue, whiteness, appearance and vision. Like non-coated cultural paper, coated paper is generally toned, and non-toned coated paper is almost invisible. Except for very few colored coated papers, the purpose of toning is to whiten the coated paper, and the purpose of whitening is to obtai...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D21H21/14D21H17/00
Inventor 季翔刘辉谈琛刘中芮坚克张金平
Owner SHANGHAI XINSHENG PIGMENT CHEM
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