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Preparation method and application of comb-shaped benzene-horse polymer aqueous dispersant

A water-based dispersant, polymer technology, applied in chemical instruments and methods, dissolution, pigment slurry, etc., can solve the problems of not being widely applicable, not very firm in adsorption, poor long-term stability, etc.

Inactive Publication Date: 2021-11-16
GUANGZHOU JOINTAS CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] In the production of paint and ink, pigment dispersion is a crucial link. Selecting a suitable dispersant can easily obtain a paint with uniform pigment dispersion and storage stability, although traditional dispersants show effective dispersion in aqueous dispersion media. Stabilization, but because their adsorption on the surface of pigment particles is not very firm, it is easy to desorb from the surface of the particles, resulting in the re-aggregation or precipitation of the dispersed particles. The long-term stability of the system is not good, which affects the appearance, hardness and aging resistance of the paint film And other properties also have adverse effects, especially the highly targeted characteristics of dispersants, the same dispersant cannot be widely used in the dispersion of different organic pigments, resulting in increased production costs for users

Method used

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  • Preparation method and application of comb-shaped benzene-horse polymer aqueous dispersant
  • Preparation method and application of comb-shaped benzene-horse polymer aqueous dispersant
  • Preparation method and application of comb-shaped benzene-horse polymer aqueous dispersant

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] A kind of comb-shaped benzene-horizon polymer aqueous dispersant, its preparation steps are as follows:

[0039] According to weight percentage, weigh 125.0 parts of SMA1200, 152.0 parts of MPEG1000, and 85.0 parts of glycidyl tertiary carbonic acid ester and add them into the reaction kettle, heat up to 120°C and start to melt, turn on the vacuum, control the vacuum degree to 0.09MPa and dehydrate for 1 hour; After melting, start stirring, continue to heat up to 170-175°C, and control the vacuum degree to 0.07-0.08MPa to react for 4 hours, take samples every 0.5h to detect the acid value, stop the reaction when the acid value reaches the specified value; cool down to 120°C, close N 2, add 2.5 parts of triethylamine under stirring, and add 540.0 parts of deionized water at the same time, when the pH value is 7.2 to 7.5, cool down to 60°C, filter and pack, and obtain a comb-shaped benzene-horse polymer aqueous solution with a solid content of 41.2%. Dispersant.

Embodiment 2

[0041] A kind of comb-shaped benzene-horizon polymer aqueous dispersant, its preparation steps are as follows:

[0042] According to weight percentage, weigh 126.0 parts of SMA1000, 155.0 parts of MPEG1000, and 82.0 parts of glycidyl tertiary carbonic acid ester into the reaction kettle, heat up to 120°C and start to melt, turn on the vacuum, control the vacuum degree to 0.09MPa and dehydrate for 1 hour; wait for complete After melting, start stirring, continue to heat up to 170-172°C, and control the vacuum degree to 0.07-0.08MPa to react for 4 hours, take samples every 0.5h to detect the acid value, stop the reaction when the acid value reaches the specified value; cool down to 120°C, close N 2 , add 2.6 parts of triethylamine under stirring, and add 550.0 parts of deionized water at the same time, when the pH value is 7.0 to 7.2, cool down to 60°C, filter and pack, and obtain a comb-shaped benzene-horse polymer aqueous solution with a solid content of 40.5%. Dispersant.

Embodiment 3

[0044] A kind of comb-shaped benzene-horizon polymer aqueous dispersant, its preparation steps are as follows:

[0045] According to weight percentage, weigh 125.0 parts of SMA1000, 150.0 parts of MPEG1200, and 90.0 parts of glycidyl tertiary carbonic acid ester and add them into the reaction kettle, heat up to 120°C and start to melt, turn on the vacuum, control the vacuum degree to 0.09MPa and dehydrate for 1 hour; wait for complete After melting, start stirring, continue to heat up to 170-172°C, and control the vacuum degree to 0.07-0.08MPa to react for 4 hours, take samples every 0.5h to detect the acid value, stop the reaction when the acid value reaches the specified value; cool down to 120°C, close N 2 , add 3.0 parts of triethanolamine under stirring, and add 550.0 parts of deionized water at the same time, when the pH value is 7.0 to 7.2, cool down to 60°C, filter and pack, and obtain a comb-shaped benzene-horse polymer aqueous dispersion with a solid content of 40.2%...

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Abstract

The invention relates to a preparation method and application of a comb-shaped benzene-horse polymer water-based dispersant. The comb-shaped benzene-horse polymer water-based dispersant is biodegradable and does not contain alkylphenol; the comb-shaped benzene-horse polymer water-based dispersant prepared by the invention has an anionic-nonionic-comb-shaped structure, the molecular structure contains a plurality of pigment adsorption groups such as aromatic rings, tertiary carbon alkyl, carboxyl, hydroxyl, amido and polyether, and the comb-shaped benzene-horse polymer water-based dispersant has excellent wetting dispersibility, excellent chemical resistance, water resistance and aging resistance, can improve the gloss and tinting strength, can improve the pigment content, has excellent system compatibility, low-foam property and excellent low-viscosity stability, prevents flooding and floating, can be used for preparing resin / resin system-free high-solid-content low-viscosity pigment concentrated slurry dispersions, such as organic red, yellow and purple pigments, inorganic pigments and matting powder, and is particularly suitable for dispersion of carbon black and phthalocyanine pigments; the dispersant can also be used for mixing and grinding organic pigments, anti-rust pigments and fillers, and is suitable for water-based systems such as water-based color paste, water-based industrial paint, water-based ink, water-based anti-corrosion and anti-rust primer and the like.

Description

technical field [0001] The invention relates to a water-based dispersant, in particular to a preparation method and application of a comb-shaped benzene-horizon polymer water-based dispersant, and belongs to the technical field of polymer dispersants. Background technique [0002] In the production of paint and ink, pigment dispersion is a crucial link. Selecting a suitable dispersant can easily obtain a paint with uniform pigment dispersion and storage stability, although traditional dispersants show effective dispersion in aqueous dispersion media. Stabilization, but because their adsorption on the surface of pigment particles is not very firm, it is easy to desorb from the surface of the particles, resulting in the re-aggregation or precipitation of the dispersed particles, the long-term stability of the system is not good, and the appearance, hardness and aging resistance of the paint film And other properties also have adverse effects, especially the highly targeted cha...

Claims

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Application Information

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IPC IPC(8): C08G81/02B01F17/52C09D17/00C09K23/52
CPCC08G81/025C09D17/001
Inventor 许钧强
Owner GUANGZHOU JOINTAS CHEM
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