Bakeable thick paste type water-based damping coating for automobile and preparation method of coating

A technology for damping coatings and automobiles, applied in coatings and other directions, can solve the problems of stomata delamination, surface crusting, and the inability of water-based damping coatings to be widely used, to meet the needs of assembly line production applications, excellent high temperature resistance, and excellent vibration damping. The effect of the noise reduction effect

Inactive Publication Date: 2021-04-20
重庆德天汽车新材料研究院有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Conventional water-based damping coatings are subjected to baking and quick-drying treatment in a thick coating state, and problems such as surface crusting, bubbling, and internal pore stratification will occur, which seriously affect the performance and use of the coating.
The production process of the automobile manufacturing industry is continuous production. The water-based damping coating has a short opening time from spraying to baking, and then enters the high-temperature baking stage (140-160°C), causing the surface of the water-based damping coating to dry quickly at high temperature. Skinning, the moisture in the thick paint film is not volatilized in time, resulting in defects such as bubbling and internal pore delamination after the coating film, so the current baking thick build water-based damping coating cannot be widely used in the automobile manufacturing industry

Method used

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  • Bakeable thick paste type water-based damping coating for automobile and preparation method of coating
  • Bakeable thick paste type water-based damping coating for automobile and preparation method of coating
  • Bakeable thick paste type water-based damping coating for automobile and preparation method of coating

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] With a low-speed stirring disperser at 200r / min, add 251.3g of emulsion (SD-55:EP07501=2:1) ​​into the stirring tank, then add 67.9g of deionized water, then add 2g of BYK-154, 1g of ANTI-TERRA-250, 2.3g Emulsogen LCN 070, 12.5g Alcohol Ester Dodeca, 2g BYK-022, 2.7g Coadd TM DF-022, 1g of LexomerSHV, stirred for 10-15min, then added 4g of AMP-95 to adjust the pH to 8.0-9.0, then added 2.5g of SPE-3282, stirred for 20-30min. Then add 11.4g of magnesium aluminum silicate, 125g of mica powder, 2.9g of expandable thermoplastic microspheres, 410.5g of heavy calcium, and 96.3g of talcum powder at a stirring speed of 300-500r / min, and stir for 30 minutes after adding. After -60min, adjust the speed to 500-1000r / min and add 4.7g After ViscoPlus 3060 is stirred for 15-30 minutes, a baking and quick-drying water-based damping coating can be obtained. During the whole process of paint mixing, the temperature is controlled at ≤35°C.

Embodiment 2

[0051] Under the low-speed stirring disperser at 200r / min, add 207.2g of emulsion (Antamp TM0658: SD-55=3:1) into the stirring tank, then add 90.1g of deionized water, and then add 2.8g of Coadd TM D-72, 2.3g of Emulsogen LCN 070, 12.2g of dipropylene glycol butyl ether, 2g of Coadd by MO NXZ AG, 2.6g TM DF-022, 0.9g of MBS, stirred for 10-15min, then added 4g of AMP-95 to adjust the pH to 8.0-9.0, then added 2.4g of SPE-3282, stirred for 20-30min. Then add 11.2g of magnesium aluminum silicate, 122.5g of mica powder, 2.8g of expandable thermoplastic microspheres, 9.4g of graphite, 431g of heavy calcium, and 94.2g of talcum powder at a stirring speed of 300-500r / min. After the addition, stir for 30-60 minutes, then adjust the speed to 500-1000r / min and add 2.4g of Coadd TM After U-501 is stirred for 15-30 minutes, a baking and quick-drying water-based damping coating can be obtained. During the whole process of paint mixing, the temperature is controlled at ≤35°C.

Embodiment 3

[0053] Add 251.2g of emulsion SD-55 to the stirring tank under the low-speed stirring disperser at 200r / min, then add 69.3g of deionized water, and then add 4g of OROTAN in turn TM N-4045, 5.6g Dispers 760W, Emulsogen LCN 070 1.8g, Coadd 0.5g TM W-138, 12.5g of dipropylene glycol butyl ether, 2.9g of BYK-022, 1g of MBS, after stirring for 10-15min, add 4g of AMP-95 to adjust the pH to 8.0-9.0, then add 2.3g of SPE-3282, Stir for 20-30min. Then add 11.4g of magnesium aluminum silicate, 124.5g of mica powder, 2.9g of expandable thermoplastic microspheres, 404.7g of heavy calcium, and 96.5g of talcum powder at a stirring speed of 300-500r / min, and stir after adding After 30-60 minutes, adjust the speed to 500-1000r / min, add 3.9g of ASE-60 and stir for 15-30 minutes to obtain a baking and quick-drying water-based damping coating. During the whole process of paint mixing, the temperature is controlled at ≤35°C.

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Abstract

A bakeable thick paste type water-based damping coating for an automobile comprises 20-45wt% of water-based acrylic emulsion , 2.5-6 wt% of an auxiliary agent; 5-30 wt% of mica powder; 35-55 wt% of calcium carbonate; 5-35 wt% of a functional filler; and the balance of deionized water. The invention also provides a preparation method of the damping coating, and the method comprises the following steps: sequentially adding the water-based acrylic emulsion, deionized water and assistants under a low-speed stirring condition, regulating the pH value of the system to 8.0-9.0, sequentially adding a functional filler, mica powder and calcium carbonate under a medium-speed stirring condition, uniformly stirring, and stirring under a high-speed stirring condition to obtain the bakeable thick paste type water-based damping coating for the automobile. The damping coating provided by the invention can be directly baked and cured at a high temperature after thick coating (the thickness of a wet film is 2-4.5 mm), has high solid content, a wide temperature range and excellent vibration and noise reduction effects, and can effectively meet the requirements of production and application of an assembly line of an automobile main engine plant.

Description

technical field [0001] The invention relates to the field of coatings, in particular to a bakeable thick-build water-based damping coating for automobiles and a preparation method thereof Background technique [0002] With the rise and rapid development of my country's automobile industry, people's requirements for vehicle comfort and environmental protection are becoming more and more stringent. How to effectively reduce the noise and vibration when the vehicle is running, and speed up the research and development of new environmentally friendly vehicles is one of the key issues that vehicle manufacturers face in vehicle design and production. [0003] At present, my country mainly uses traditional asphalt damping materials and PVC damping materials as anti-vibration, noise reduction and anti-stone impact materials, which are widely used in automotive exteriors such as underbody panels, fenders, wheel covers, and interior roofs, side walls, and doors. , floor, etc. Althoug...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D133/04C09D125/14C09D7/61C09D7/65
Inventor 王晓凤戴宏程
Owner 重庆德天汽车新材料研究院有限公司
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