Preparation method for self-adsorption type liquid pigment for regulating brightness of paper product

A self-adsorption, liquid technology, applied in the direction of pigment-containing coatings, etc., can solve the problems of complex preparation process and unsuitability for large-scale production, achieve stable chemical properties, huge market application prospects and commercial value, and avoid color bleeding.

Active Publication Date: 2012-06-27
SUZHOU SUNMUN TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the preparation process of this method is relatively compli

Method used

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  • Preparation method for self-adsorption type liquid pigment for regulating brightness of paper product
  • Preparation method for self-adsorption type liquid pigment for regulating brightness of paper product

Examples

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Example Embodiment

[0034] Example 1

[0035] (1) Prepare 5000 g of composite pigment soaking liquid with N,N-dimethylformamide and triethanolamine at a mass ratio of 1:10;

[0036] (2) Put the purple pigment filter cake and the blue pigment filter cake into the composite pigment soaking liquid described in (1) at a mass ratio of 0.01:1. The total mass of the purple pigment filter cake and the blue pigment filter cake is 5000g, and Soak for 90 minutes at 10°C to obtain a composite pigment mixture, then filter the composite pigment mixture, and wash the precipitate with deionized water and ethanol until the conductivity of the washing solution is less than or equal to 100 μS / cm. The composite pigment cake is obtained. ; Among them, the purple pigment filter cake comes from Changzhou North America Chemical Co., Ltd., and the blue pigment filter cake comes from Jiangsu Yabang Group. The solid content of the filter cake is 25.0wt.%;

[0037] (3) Take 500 grams of the composite pigment cake obtained in (2),...

Example Embodiment

[0040] Example 2

[0041] (1) Prepare 5000g composite pigment soaking liquid with a mass ratio of 3:1 N,N-dimethylformamide and triethanolamine;

[0042] (2) Put the purple pigment filter cake and the blue pigment filter cake into the composite pigment soaking liquid described in (1) at a mass ratio of 3:1. The total mass of the purple pigment filter cake and the blue pigment filter cake is 5000g, and Soak at 15°C for 60 minutes to obtain composite pigment mixture, then filter the composite pigment mixture, and wash the precipitate with deionized water and ethanol until the conductivity of the washing solution is less than or equal to 100 μS / cm. Cake; the purple pigment filter cake comes from Changzhou North America Chemical Co., Ltd., and the blue pigment filter cake comes from Jiangsu Yabang Group. The solid content of the filter cake is 25.0wt.%;

[0043] (3) Take 500 grams of the composite pigment cake obtained in (2), add siloxane coupling agent to it and disperse it at 4500r / m...

Example Embodiment

[0046] Example 3

[0047] (1) Prepare 5000 g of composite pigment soaking liquid with a mass ratio of N,N-dimethylformamide and triethanolamine at a mass ratio of 1:1;

[0048] (2) Put the purple pigment filter cake and the blue pigment filter cake into the composite pigment soaking liquid described in (1) at a mass ratio of 3:1. The total mass of the purple pigment filter cake and the blue pigment filter cake is 5000g, and Soak for 45 minutes at 20°C to obtain a composite pigment mixture, then filter the composite pigment mixture, and wash the precipitate with deionized water and ethanol until the conductivity of the washing solution is less than or equal to 100 μS / cm. Cake; the purple pigment filter cake comes from Changzhou North America Chemical Co., Ltd., and the blue pigment filter cake comes from Jiangsu Yabang Group. The solid content of the filter cake is 25.0wt.%;

[0049] (3) Take 500 grams of the composite pigment cake obtained in (2), add siloxane coupling agent to it a...

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Abstract

The invention discloses a preparation method for a self-adsorption type liquid pigment for regulating brightness of a paper product. According to the method, a purple pigment filter cake and a blue pigment filter cake are compounded; N,N-dimethyl formamide and triethanolamine are adopted to treat the compounded pigment filter cake; a silica sol and a siloxane coupling agent are adopted to carry out surface film coating on the compounded pigment filter cake, wherein the film thickness is controlled in the range of 50-100 nm; 10.0-30.0 wt.% of the film coated compounded pigment, 2.0-10.0 wt.% of a dispersing agent, 0.01-0.8 wt.% of an antibacterial agent, and the balance of deionized water are mixed, and are subjected to mechanical crushing to prepare into the liquid pigment capable of self-adsorption with paper pulp fibers and fillers. The preparation process of the method of the present invention is simple and feasible, and the obtained liquid pigment can be used for regulating the brightness of the paper product.

Description

technical field [0001] The invention relates to a preparation method of a liquid pigment, in particular to a preparation method of a self-absorbing liquid pigment for whitening paper products. Background technique [0002] The visual effect of paper depends not only on the brightness (that is, whiteness) of the paper, but also on the hue of the paper. Under the same whiteness, purple-white or blue-white paper has a much higher visual whiteness than yellow-hued paper. Therefore, in the paper production process, especially in the production process of high-grade cultural paper, it is often necessary to color the paper, and purple-white and blue-white are the main directions of color matching. The method commonly used for paper coloring at present is to add coloring dyes or fluorescent whitening agents to pulp. There are three main types of toning dyes commonly used in the paper industry: basic dyes, acid dyes and direct dyes. [0003] Shading dyes are divided into solid and...

Claims

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Application Information

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IPC IPC(8): D21H19/36
Inventor 伍金平周华杜长森许丹解亚楠王东海
Owner SUZHOU SUNMUN TECH CO LTD
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