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High-solid content high-build water-based damping coating and preparation method thereof

A high-solid content, damping coating technology, applied in coatings and other directions, can solve the problems of not wide damping temperature range, inability to coat a thick enough paint film, poor low-temperature damping performance, etc., to achieve good mechanical properties and coating performance, Good application prospects and wide damping temperature range

Inactive Publication Date: 2014-09-10
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
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Problems solved by technology

However, some water-based damping coatings such as CN 102558925 A ensure product quality by adding a part of organic solvent, causing health problems for construction workers and even users
[0003] In the research process of water-based damping coatings, the existing technology usually has a low solid content. Even if the solid content is high, it is prone to sag phenomenon and the viscosity is too high to be easy to apply, which eventually leads to the inability to apply a thick enough coating at one time during construction. Therefore, it is particularly important to synthesize a suitable emulsion system that can disperse more spices and obtain excellent rheological properties through the action of thickeners.
In addition, the damping temperature range of the paint film is narrow, and the low-temperature damping performance is poor, which directly leads to poor product performance.
Some water-based damping coatings, such as CN102408792 A and CN101864227 A, achieve the purpose of broadening the damping temperature range by compounding emulsions with different glass transition temperatures, but the damping factor is low, the damping efficiency is not high, and the damping temperature range is not high. Not wide enough to achieve good shock and noise reduction

Method used

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  • High-solid content high-build water-based damping coating and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] (1) Preparation of water-based styrene-acrylic emulsion

[0024] First mix 27.75g styrene, 45g butyl acrylate, 0.75g methacrylic acid, 1.5 methacrylamide, 4.076g DSB, 1.875gPE6100, 5.357gEF810, 0.75gNaHCO3, 300g water and add them into the reaction kettle, turn on the speed of the stirring device It is 330r / min and the heating device is up to 82°C, and the whole process is protected by nitrogen gas. 1.125g of ammonium persulfate and 1.125g of sodium bisulfite were respectively dissolved in 25g of water and then added dropwise for 35 minutes to react, and the seed emulsion was obtained after aging for 30 minutes.

[0025] Then mix 249.75g styrene, 405g butyl acrylate, 6.75g methacrylic acid, 13.5g methacrylamide, 4.076g DSB, 1.875gPE6100, 5.357gEF810, 0.75gNaHCO3, 300g water and mix well, then pre-emulsify by stirring for 0.5h and drop together Add it to the reaction kettle, and at the same time, add the initiator dropwise. The initiator is 1.125g ammonium persulfate an...

Embodiment 2

[0032] (1) Preparation of water-based styrene-acrylic emulsion

[0033] Same as Example 1.

[0034] (2) Dispersion of fillers

[0035] Same as Example 1

[0036] (3) Preparation of paint

[0037] With a high-speed mixer at 1600r / min, add 19.25g of methyl etherified melamine (CYEML385) to 100g of emulsion, then add 3g of aminomethylpropanol to adjust the pH to 8.8-9.0, stir for 10min, then add 1.93g of byk-333 and 1.93g of byk-190 and 1.93g byk-011 and 1.93g byk-024, adjust the speed to 3000r / min, stir for 15min. Then in another beaker, add heavy calcium slurry in 214g step (2), 32.6g step (2) medium slip, cloud slurry, 3.85g vermiculite powder (325 order) and 11.55g mica powder (1000 order), as far as possible After stirring evenly, add it into the emulsion at a speed of 1000r / min. After adding, adjust the speed to 2000r / min and stir evenly. After 15 minutes, when the liquid level is stable, add 3.85g of fumed silica and 3.85g of bentonite, and stir for 5 minutes after add...

Embodiment 3

[0039] (1) Preparation of water-based styrene-acrylic emulsion

[0040] Same as Example 1.

[0041] (2) Dispersion of fillers

[0042] Add 20g of 190 to 100g of water, stir evenly with a high-speed mixer at 1600r / min, then add 1.5g of byk-011 and 3.5g of byk-024, disperse at 3000r / min for 10min, add 900g of heavy calcium (of which 1250 mesh The mass ratio of calcium to 800 mesh heavy calcium and 400 mesh heavy calcium is 1:2:2). After adding, adjust the speed to 2000r / min to disperse evenly. After the slurry is smooth and stable, add 10g byk-333, 3.5g For byk-425 and 3.5gbyk-428, keep stirring at the rotating speed for 10 minutes to obtain heavy calcium slurry.

[0043] Add 30g190 to 150g water, stir well at 1600r / min with a high-speed mixer, add 1.5g byk-011 and 3.5g byk-024, disperse at 3000r / min for 10min, add 375g talcum powder (1250 mesh) and 75g mica powder (1000 mesh), after adding, adjust the speed to 2000r / min to disperse evenly, add 5g byk-333, 2g byk-425 and 2g b...

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Abstract

The invention relates to a high-solid content high-build water-based damping coating and a preparation method thereof. The water-based damping coating comprises the following components in parts by weight: 20-40 parts of emulsions, 1-5 parts of curing agents, 50-60 parts of inorganic fillers, 5-10 parts of water, 1-2 parts of film-forming auxiliary agents, 1-6 parts of thickening agents, 0.5-2 parts of water-based dispersing agents, 0.5-3 parts of water-based wetting agents and 0.5-1.5 parts of water-based defoaming agents, wherein the emulsions are high-solid content styrene-acrylic emulsions with lower glass temperature. The high-solid content high-build water-based damping coating is prepared through the following three steps of: preparation of a water-based emulsion, addition of a filler and an auxiliary agent and paint blending. The product disclosed by the invention has the advantages of wider damping temperature domain, better damping property and very good low-temperature damping property especially. The high-solid content high-build water-based damping coating disclosed by the invention can be coated in a scratching way and a spraying way, can realize the thickness of a paint film more than 3 mm through one-pass construction, is obvious in shear thinning, has the advantages of good sag resistance, no curling or cracking in a drying and solidifying process and good mechanical property, can be applied to an automobile and various mechanical equipment and achieves the effects of vibration reduction, sound insulation and noise reduction.

Description

technical field [0001] The invention belongs to the field of preparation of chemical products and water-based coatings, and is especially suitable for coating parts with strong vibrations in the automobile industry, high-speed rail and various mechanical equipment to achieve the effect of shock absorption and noise reduction. Background technique [0002] Under the principle of developing the coatings industry based on economy, efficiency, ecology and energy, the global coatings market is developing towards water-based, high-solid and solvent-free coatings that are more suitable for environmental protection. The development of water-based damping coatings is also the overall development trend of the composite coatings industry. However, some water-based damping coatings such as CN 102558925 A ensure product quality by adding a part of organic solvent, causing health problems to construction workers and even users. [0003] In the research process of water-based damping coat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D133/08C09D7/12C08F212/08C08F220/18C08F220/06
Inventor 李效玉黄琛邱藤何立凡
Owner BEIJING UNIV OF CHEM TECH
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