Polymer coated inorganic pigment paste for color modulation of production line and preparation method thereof

A technology of inorganic pigments and polymers, which is applied in the treatment of pigment pastes and dyeing polymer organic compounds, etc. It can solve the problems of low adsorption force of dispersants, decreased coloring power of inorganic pigment pastes, and easy foaming, etc. small diameter, high tinting strength and storage stability

Active Publication Date: 2014-04-09
常熟世名化工科技有限公司
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  • Abstract
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Problems solved by technology

However, the color pastes prepared by these processes often suffer from pigment sedimentation and reduction in tinting strength caused by the desorption of the dispersant during long-term storage, and are difficult to be used in production line coloring
[0004] The dispersant is used to disperse the inorganic pigment directly, and there are defects such as the small adsorption force of the dispersant on the surface of the pigment and the serious desorption phenomenon. After long-term storage, it is very easy to cause inorganic The coloring power of the pigment paste is reduced, and when the concentration of the dispersant is high, the viscosity of the dispersion will be too large and easy to foam, which will also reduce the accuracy and reproducibility of the production line, resulting in batches of paint production. time difference

Method used

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  • Polymer coated inorganic pigment paste for color modulation of production line and preparation method thereof

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preparation example Construction

[0040] The present invention also provides a method for preparing the above-mentioned polymer-coated inorganic pigment color paste for color matching in the production line, which includes the following steps:

[0041]a) Disperse the inorganic pigment accounting for 40-80% of the mass ratio of the low-boiling point solvent into the low-boiling point solvent, and sequentially add the silane coupling agent accounting for 5-15% of the mass ratio of the inorganic pigment, accounting for silane coupling agent mass ratio of 50-100% deionized water, react while stirring to get the initial inorganic pigment slurry;

[0042] b) adding a polymer accounting for 10-40% of the mass fraction of the inorganic pigment to the initial inorganic pigment slurry, after grinding and dispersing on a sand mill, adding deionized water accounting for 80-200% of the mass ratio of the low boiling point solvent, and then Adjusting the pH value to 8-9, mixing evenly, and filtering to obtain a polymer-coate...

Embodiment 1

[0052] Disperse 65 grams of carbon black into 160 grams of acetone, then add 4.5 grams of silane coupling agent KH-550, 5 grams of KH-602 and 5 grams of deionized water dropwise, and react at room temperature for 6 hours at a stirring speed of 500r / min , then add 6.5 grams of styrene-acrylic resin, after grinding and dispersing 3 times on a small sand mill in the laboratory, add 128 grams of deionized water, then add a certain amount of triethanolamine, stir evenly, and make the pH of the system be 8 After mixing evenly, the acetone and part of the water in the system were distilled off under reduced pressure at 30°C and 0.02MPa pressure, so that the styrene-acrylic resin was deposited and coated on the surface of the carbon black pigment, and finally 130 grams of polymer were obtained. Coated carbon black pigment concentrate.

[0053] Add 3 grams of sodium lauryl sulfate, 20 grams of glycerol, 10 grams of ethylene glycol, 0.15 grams of polysiloxane defoamer, and 0.015 grams o...

Embodiment 2

[0055] Disperse 50 grams of iron oxide red pigment into 100 grams of ethanol, then add 5 grams of silane coupling agent KH-570 and 4 grams of deionized water dropwise, and react for 24 hours at a stirring speed of 800 r / min, then add 5 grams of benzene Ethylene-itaconic acid copolymer, stir evenly, grind and disperse 10 times on a small sand mill in the laboratory, add 200 grams of deionized water and an appropriate amount of 30% NaOH aqueous solution to make the system p The H value is 8. After mixing evenly, the ethanol and part of the water in the system are removed by vacuum distillation at 40°C and 0.08MPa pressure, so that the styrene-itaconic acid copolymer is deposited and coated on the surface of the iron oxide red pigment , 77 grams of polymer-coated iron oxide red pigment concentrates were obtained.

[0056] Add 2 grams of Tween80, 10 grams of tetraethylene glycol, 10 grams of ethylene glycol, 10 grams of propylene glycol, 0.3 grams of polyether defoamer, 0.03 grams...

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Abstract

The invention relates to a polymer coated inorganic pigment paste for color modulation of a production line and a preparation method thereof. The polymer coated inorganic pigment paste for color modulation of the production line comprises the following components by mass percent: 40-60% of polymer coated inorganic pigment concentrated paste including 40-60% of inorganic pigment by mass, 0.5-2% of surface tension modifier, 10-30% of water soluble organic solvent, 0.1-0.5% of defoamer, 0.01-0.05% of antibacterial agent, and the balance of water. The polymer coated inorganic pigment paste for color modulation of the production line provided by the invention has the advantages such as small grain size, good tinting strength and high storage stability; besides, the paste can be stored for a long time without generating obvious chromatic aberration; therefore, the polymer coated inorganic pigment paste is especially applied as a water-based color paste to color modulation of the production line.

Description

technical field [0001] The invention relates to the technical field of fine chemicals, in particular to a polymer-coated inorganic pigment color paste for color production line and a preparation method thereof. Background technique [0002] The integrated color mixing system of the paint production line is a new type of color mixing system, which controls the color mixing machine through the color matching software, injects the color paste directly into the barreled paint by volume measurement, and then seals and vibrates to realize the automatic color adjustment of the paint. color. Inorganic pigments such as cobalt blue, iron oxide, and carbon black have the characteristics of light fastness, heat resistance, weather resistance, good solvent resistance, and strong hiding power. The main inorganic coloring material. Because the particle size and density of inorganic pigments are large, and the surface is not easy to adsorb dispersing aids, the water-based color paste made...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D17/00C09C3/10
Inventor 吕仕铭杜长森周华梅成国付少海
Owner 常熟世名化工科技有限公司
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