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Preparation method of hyper-branched water-based dispersant

A water-based dispersant and branching technology, applied in the field of preparation of hyperbranched water-based dispersants, can solve the problems of short wall adhesion time, inability to firmly bond the wall, and reduced viscosity of the coating carrier.

Pending Publication Date: 2021-05-28
安徽博纳新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The hyperbranched dispersant in the prior art has poor adhesion to the paint carrier, which leads to a decrease in the viscosity of the paint carrier and cannot be firmly bonded to the wall, resulting in a short wall attachment time and unable to guarantee the stability of use

Method used

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  • Preparation method of hyper-branched water-based dispersant
  • Preparation method of hyper-branched water-based dispersant
  • Preparation method of hyper-branched water-based dispersant

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preparation example Construction

[0027] Specifically, an embodiment of the present invention provides a method for preparing a hyperbranched aqueous dispersant, comprising the following steps:

[0028] 1) adding the ultrafine inorganic powder into the styrene-maleic anhydride copolymer solution and mixing evenly to obtain a copolymer slurry;

[0029] 2) Put the modified nano-titanium dioxide into a container, add sodium hydroxide solution to it, stir for 10 to 15 minutes, filter, then add acrylic acid to it, and stand and soak for 1 to 2 hours at a temperature of 45 to 50°C to obtain Modified nano titanium dioxide solution;

[0030] 3) After mixing the copolymer slurry and the modified nano-titanium dioxide solution, pour it into a stirring tank, feed nitrogen protection, and stir for 20-25 minutes to obtain a mixed slurry;

[0031] 4) Pass the mixed slurry through the atomizer to form atomized droplets and enter the drying chamber for drying and dehydration;

[0032] 5) Cool the dried mixed slurry to room ...

Embodiment 1

[0044] Add the ultrafine inorganic powder into the styrene-maleic anhydride copolymer solution and mix evenly to obtain a copolymer slurry with a solid content of 30%, which is ready for use; mix anatase titanium dioxide and rutile titanium dioxide with a mass ratio of 3:1 Titanium dioxide is mixed into a nano-titanium dioxide mixture, and then the nano-titanium dioxide mixture, titanate coupling agent, absolute ethanol and deionized water are mixed in a mass ratio of 5:2:3:4, and the resulting mixture is ultrasonically treated. Re-drying treatment, after drying, wash with absolute ethanol and air-dry naturally to obtain modified nano-titanium dioxide; put the modified nano-titanium dioxide into a container, add a sodium hydroxide solution with a mass fraction of 40% to it, and filter after stirring for 15 minutes , and then add acrylic acid to it, and stand and soak for 1.5h at a temperature of 50°C to obtain a modified nano-titanium dioxide solution; mix the copolymer slurry ...

Embodiment 2

[0046]Add the ultrafine inorganic powder into the styrene-maleic anhydride copolymer solution and mix evenly to obtain a copolymer slurry with a solid content of 30%, which is ready for use; mix anatase titanium dioxide and rutile titanium dioxide with a mass ratio of 3:2 Titanium dioxide is mixed into a nano-titanium dioxide mixture, and then the nano-titanium dioxide mixture, titanate coupling agent, absolute ethanol and deionized water are mixed in a mass ratio of 5:2:3:4, and the resulting mixture is ultrasonically treated. Re-drying treatment, after drying, wash with absolute ethanol and air-dry naturally to obtain modified nano-titanium dioxide; put the modified nano-titanium dioxide into a container, add a sodium hydroxide solution with a mass fraction of 40% to it, and filter after stirring for 15 minutes , and then add acrylic acid to it, and stand and soak for 1.5h at a temperature of 50°C to obtain a modified nano-titanium dioxide solution; mix the copolymer slurry w...

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Abstract

The invention is suitable for the technical field of dispersing agents, and provides a preparation method of a hyper-branched water-based dispersing agent, a styrene-maleic anhydride copolymer and superfine inorganic powder are fused to prepare copolymer slurry, styrene has a benzene ring structure and has a good dispersing effect on phthalocyanine coating carriers, and the superfine inorganic powder has a good dispersing effect on the phthalocyanine coating carriers; meanwhile, the maleic anhydride is used as an anchoring group for dispersing a coating carrier with significant dispersion effect, so that the adhesion capacity and viscosity of the superfine inorganic powder are improved by utilizing the copolymerization reaction of maleic anhydride and the superfine inorganic powder; meanwhile, the modified nano titanium dioxide is added, so that the dispersity and weather resistance of the hyperbranched water-based dispersing agent are further improved, and the adhesion time of a water-based paint carrier and a wall body is greatly prolonged.

Description

technical field [0001] The invention relates to the technical field of dispersants, in particular to a preparation method of a hyperbranched water-based dispersant. Background technique [0002] The molecular structure of traditional dispersants has limitations. The lipophilic group does not have sufficient carbon chain length and cannot be firmly bonded to the surface of highly polar or polar particles. It is easy to desorb and cause re-flocculation of dispersed ions; hydrophilic With fewer groups, it cannot produce enough steric hindrance effect in the aqueous dispersion system to play a stabilizing role. In order to overcome the limitations of traditional dispersants in water-phase dispersion systems, a new type of hyperdispersant has been developed, which has a unique dispersion effect on water systems. Its main features are: fast and fully adsorbed on the particle surface and in the particle A layer of hydration film is formed on the surface, shortening the grinding ti...

Claims

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Application Information

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IPC IPC(8): C09D7/62C09D7/65C09D7/61
CPCC09D7/62C09D7/65C09D7/61C08K9/04C08K2201/011C08K2003/2241C08L35/06
Inventor 李维格
Owner 安徽博纳新材料科技有限公司
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