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A kind of shock-absorbing and noise-reducing water-based damping coating for passenger cars and preparation method thereof

A technology for damping coatings and passenger cars, applied in coatings and other directions, can solve problems such as unenvironmental protection, poor dynamic viscoelastic performance and damping, and easy aging, achieve good shock absorption and noise reduction, improve processing performance, and improve mechanics. performance effect

Inactive Publication Date: 2016-02-24
HANGZHOU INST OF ADVANCED MATERIAL BEIJING UNIV OF CHEM TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Chinese patent CN201110220909.4 discloses a normal-temperature self-crosslinking silicone-modified acrylate emulsion, which adopts a hard-shell / soft-core core-shell emulsion particle structure and introduces a chemically active ketone carbonyl group into the polyacrylate macromolecule. Improve the water resistance, oil resistance and anti-adhesion of the latex film, but the adhesion is poor on the substrate with low polarity
Because the sound insulation performance of PVC material is not good, the flame retardant performance is not good, and it is not resistant to high temperature. very unfriendly
Chinese patent CN2612520 discloses a composite damping plate including a bottom layer, a surface layer, and a damping layer. The bottom layer and the surface layer of this composite damping plate are made of wooden boards, which greatly increases the weight of the car body and affects the performance of the whole car.
Due to the pendant benzene ring structure in the polystyrene hard segment molecular chain, the dynamic viscoelastic properties and damping properties of the molecular chain are poor
Therefore, it is difficult for such coatings to maintain high damping properties in a wide temperature range
This will cause the heat of the car body during the driving of the passenger car, which will cause the damping coating's shock absorption and noise reduction performance to deteriorate

Method used

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  • A kind of shock-absorbing and noise-reducing water-based damping coating for passenger cars and preparation method thereof
  • A kind of shock-absorbing and noise-reducing water-based damping coating for passenger cars and preparation method thereof
  • A kind of shock-absorbing and noise-reducing water-based damping coating for passenger cars and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Synthesis of "core-shell" type silicon acrylic-phase change material emulsion, the process is: firstly heat 200mL deionized water to 80°C, then add 35g paraffin and 3g polyethylene oxide-polypropylene oxide-polycyclo Oxyethane block copolymer template was mixed and stirred to form a stable emulsion; in another container, 22g of sodium silicate was dissolved in 50mL of deionized water and stirred, and the pH value was adjusted to 5.5-6.5 with hydrochloric acid to form a silica sol; then Add the silica sol dropwise into the paraffin wax emulsion, adjust the pH value to 4.5-5.0 and continue to stir for 4 hours; after cooling the obtained silica-coated paraffin wax suspension to 60°C, continue to add the template agent and stir and emulsify for 30 minutes, then Add 25g of ethyl acrylate, 15g of active siloxane containing double bonds, and 1g of sodium persulfate initiator, and stir and react for 5 hours to obtain a "core-shell" silicone acrylic-phase change material emulsion...

Embodiment 2

[0031] The synthesis method of the "core-shell" silicone acrylic-phase change material emulsion is the same as that in Example 1.

[0032] The preparation process of the shock-absorbing and noise-reducing water-based damping coating for passenger cars is as follows: firstly, 150mL deionized water is added to a high-speed stirring tank, followed by adding 8g of dispersant, 7g of corrosion inhibitor, 150g of wollastonite, 150g of sericite, glass micro 150 g of beads were dispersed and stirred evenly, and then ground with a conical mill until the fineness of the dispersed phase reached below 30 μm to obtain a water-dispersed slurry. Then, under high-speed stirring, add 190g of silicon acrylic-phase change material emulsion, 190g of acrylate copolymer emulsion and 150g of styrene-acrylic copolymer emulsion into the above-mentioned water slurry, then add 5g of pH regulator, 10g of defoamer, and finally add 12g of the rheological additive, mixed and stirred evenly, and then filtered...

Embodiment 3

[0035] The synthesis method of the "core-shell" silicone acrylic-phase change material emulsion is the same as that in Example 1.

[0036] The preparation process of the shock-absorbing and noise-reducing water-based damping coating for passenger cars is as follows: first, 150 mL of deionized water is added to a high-speed stirring tank, followed by adding 10 g of dispersant, 7 g of corrosion inhibitor, 100 g of wollastonite, 250 g of sericite, and glass micro 150 g of beads were dispersed and stirred evenly, and then ground with a conical mill until the fineness of the dispersed phase reached below 30 μm to obtain a water-dispersed slurry. Then, under high-speed stirring, add 150g of silicon acrylic-phase change material emulsion, 150g of acrylate copolymer emulsion and 190g of styrene-acrylic copolymer emulsion into the above-mentioned water slurry, then add 5g of pH regulator, 10g of defoamer, and finally add 12g of the rheological additive, mixed and stirred evenly, and th...

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Abstract

The invention discloses a damping and denoising water-soluble damping coating for passenger vehicles, and a preparation method thereof. The coating comprises 10-15wt% of 'core-shell' type silicone-acrylic-phase-change material emulsion, 5-15wt% of acrylate copolymer emulsion, 5-15wt% of benzene-acrylic copolymer emulsion, 30-55wt% of inorganic filler, 2-5wt% of assistant and 15-25wt% of deionized water, wherein the 'core-shell' type silicone-acrylic-phase-change material emulsion is a significant component for remarkably enhancing the damping property of the coating, and is prepared by synthesizing an organic phase-change micro-capsule wrapped with silicon dioxide, and further wrapping the silicon dioxide with a polysiloxane-acrylate copolymer, thereby obtaining the silicone-acrylic-phase-change material emulsion with a double-layer wrapped 'core-shell' structure.

Description

technical field [0001] The invention relates to a shock-absorbing and noise-reducing water-based damping coating and a preparation method thereof, in particular to a shock-absorbing and noise-reducing paint for passenger vehicles with the characteristics of good damping, wide operating temperature range, excellent shock-absorbing effect, and environmental friendliness. Water-based damping coating and preparation method thereof. Background technique [0002] In order to play the role of shock absorption, noise reduction and heat insulation in automobile production, a layer of viscoelastic polymer material - damping rubber sheet is often adhered to the inner surface of the body floor. The 2013 "315 Holiday" exposed the problem of interior pollution caused by the use of asphalt damping panels in many high-end cars, which aroused the attention of the general public. Because asphalt contains a large amount of harmful substances such as benzene and polybenzene, especially under l...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D133/04C09D125/14C09D7/12
Inventor 汪晓东郭琳武德珍刘福王国芝黄金伍国栋
Owner HANGZHOU INST OF ADVANCED MATERIAL BEIJING UNIV OF CHEM TECH
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