Preparation method and application of hyperbranched polymer water soluble dispersant

A hyperbranched polymer, water-based dispersant technology, applied in coatings, pigment pastes, anti-corrosion coatings, etc., can solve the adverse effects of paint film appearance, hardness and aging resistance, not widely applicable, poor long-term stability, etc. question

Pending Publication Date: 2021-10-22
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 hyperbranched polymer water soluble dispersant
  • Preparation method and application of hyperbranched polymer water soluble dispersant
  • Preparation method and application of hyperbranched polymer water soluble dispersant

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] A kind of hyperbranched polymer aqueous dispersant, its preparation steps are as follows:

[0038] According to weight percentage, weigh 125.0 parts of SMA1200, 155.0 parts of MPEG1000, 65.0 parts of EO-PO-EO block copolymer into the reaction kettle, heat up to 120°C and start to melt, turn on the vacuum, and control the vacuum degree to 0.09MPa for dehydration 1h; start stirring after complete melting, continue to raise the temperature to 170-175°C, and control the vacuum degree to 0.07-0.08MPa to react for 4h, 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, turn off N 2, add 2.6 parts of triethylamine under stirring, and add 520.0 parts of deionized water at the same time, when the pH value is 7.5 to 7.8, cool down to 60 ° C, filter and pack, and obtain a hyperbranched polymer aqueous dispersant with a solid content of 40.6%.

Embodiment 2

[0040] A kind of hyperbranched polymer aqueous dispersant, its preparation steps are as follows:

[0041] According to the percentage by weight, weigh 126.0 parts of SMA1000, 165.0 parts of MPEG1000, 55.0 parts of EO-PO-EO block copolymer into the reactor, heat up to 120°C and start to melt, turn on the vacuum, and control the vacuum to 0.09MPa for dehydration 1h; start stirring after complete melting, continue to heat up to 170-172°C, and control the vacuum degree to 0.07-0.08MPa to react for 4h, 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, turn off N 2 , add 2.8 parts of triethylamine under stirring, and add 500.0 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 hyperbranched polymer aqueous dispersion with a solid content of 41.5%.

Embodiment 3

[0043] A kind of hyperbranched polymer aqueous dispersant, its preparation steps are as follows:

[0044] According to weight percentage, weigh 125.0 parts of SMA1000, 160.0 parts of MPEG1200, 60.0 parts of EO-PO-EO block copolymer into the reactor, heat up to 120°C and start to melt, turn on the vacuum, and control the vacuum to 0.09MPa for dehydration 1h; start stirring after complete melting, continue to heat up to 170-172°C, and control the vacuum degree to 0.07-0.08MPa to react for 4h, 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, turn off N 2 , add 3.0 parts of triethanolamine under stirring, and add 500.0 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 hyperbranched polymer aqueous dispersion with a solid content of 41.2%.

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Abstract

The invention relates to a preparation method of a hyperbranched polymer water soluble dispersant and application of the dispersant in water-based color paste. The dispersant is poly (styrene-co-maleic anhydride)-g-(methoxypolyethylene glycol + EO-PO-EO + NR3), is biodegradable and does not contain alkylphenol. According to the preparation method of the hyperbranched polymer water soluble dispersant, the dispersant has an anionic nonionic-multi-branched-chain comb-shaped structure, the molecular structure contains aromatic rings, carboxyl, hydroxyl, amido, polyether and other pigment adsorption groups, and pigment particles are prevented from flocculating and settling by utilizing steric hindrance. The dispersant has excellent viscosity-reducing dispersibility, improves tinting strength, prevents floating and flooding, can be used for preparing resin-free / resin-system high-solid-content low-viscosity pigment concentrated slurry dispersions such as organic red, yellow and purple pigments, inorganic pigments and matting powder, can also be used for mixing and dispersing 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 hyperbranched 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 characteristics o...

Claims

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Application Information

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IPC IPC(8): C08G81/02C09B67/46C09D17/00C09D133/04C09D5/08C09D7/65C09D187/00
CPCC08G81/025C09B67/009C09D17/003C09D17/007C09D17/008C09D133/04C09D5/08C09D7/65C08L87/005C08K3/04
Inventor 许钧强
Owner GUANGZHOU JOINTAS CHEM
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