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PVC (Polyvinyl Chloride) stone-bumping resistant paint and preparation method thereof

A technology for preventing stone attack and PVC resin, applied in the direction of coating, can solve the problems of coating denaturation, uneven thickness, coating sagging, etc., to avoid harmful substances to the environment and human body, improve the coating effect, and improve the The effect of thixotropic properties

Active Publication Date: 2010-11-10
SHAANXI DADI IND CO LTD OF CHINA NAT NUCLEAR
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Currently widely used PVC anti-stone chip coating has a certain baking resistance, but the sagging and over-baking performance is not good
After the PVC anti-stone chip coating is sprayed, it vibrates with the car body on the conveyor belt, and the coating sags, and the thickness is uneven, which affects the anti-stone chip effect and appearance
When baking and setting, the two sides of the car body where the baking airflow is directly facing, the local temperature is too high, resulting in denaturation and cracking of the coating, and in severe cases, blistering and falling off
At the same time, PVC anti-stone chip coatings do not want to contain substances harmful to the environment and human body such as lead salts
These problems limit the wide application of PVC anti-stone chip coatings

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0067] Example 1 (viscosity is 4000mpa.s):

[0068] (1). Take 60Kg of organic bentonite and add it to 60Kg of dioctyl phthalate, disperse evenly with a high-speed disperser, and make a paste for use.

[0069] (2). Take 0.2Kg of carbon black and 0.8Kg of titanium dioxide into 2Kg of dioctyl phthalate, stir evenly, and then pass through a three-roller fine-roller to a particle size of ≤30μm, and make a color paste for later use.

[0070] (3). Take 5Kg of polyamide resin and add it to 5Kg of dioctyl phthalate, and disperse evenly with a high-speed disperser to make a polyamide resin paste for use.

[0071] (4). Add the remaining amount of dioctyl phthalate, 100Kg of dibutyl phthalate and 120Kg of dioctyl sebacate into the kneader, start stirring, and add 80Kg of light carbonic acid under stirring Calcium, 60Kg heavy calcium carbonate, 120Kg nano-active calcium carbonate, stir evenly, then add organic bentonite paste, polyamide resin paste, color paste, 12Kg zinc stearate, 12Kg barium ste...

Embodiment 2

[0082] Example 2 (viscosity is 4000mpa.s):

[0083] (1). Take 40Kg of organic bentonite and add it to 40Kg of dioctyl phthalate, disperse it evenly with a high-speed disperser, and make a paste for use.

[0084] (2). Take 0.2Kg of carbon black and 0.8Kg of titanium dioxide into 2Kg of dioctyl phthalate, stir evenly, and then pass through a three-roller fine-roller to a particle size of ≤30μm, and make a color paste for later use.

[0085] (3). Take 5Kg of polyamide resin and add it to 5Kg of dioctyl phthalate, and disperse evenly with a high-speed disperser to make a polyamide resin paste for use.

[0086] (4). Add the remaining dioctyl phthalate, 50Kg dibutyl phthalate and 120Kg dioctyl sebacate to the kneader, start stirring, and add 100Kg light carbonic acid under stirring Calcium, 80Kg heavy calcium carbonate, 150Kg nano-active calcium carbonate, stir evenly, then add organic bentonite paste, polyamide resin paste, color paste, 12Kg zinc stearate, 12Kg barium stearate, and fully s...

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Abstract

The invention relates to PVC (Polyvinyl Chloride) stone-bumping resistant paint and a preparation method thereof. The PVC stone-bumping resistant paint is formed by mediating, reacting and finely rolling dioctyl phthalate, dibutyl phthalate, dioctyl sebacate, light calcium carbonate, heavy calcium carbonate, nano active calcium carbonate, zinc stearate, barium stearate, organic bentonite, polyamide resin, carbon black, titanium pigment and PVC resin. The low-temperature flexibility of the PVC stone-bumping resistant paint can be improved by compounding three plasticizers of the dioctyl phthalate, the dibutyl phthalate and the dioctyl sebacate; the thixotropic performance of the paint can be improved by combining the organic bentonite with the nano active calcium carbonate; the adhesive force and the high-temperature yellowing resistance of the paint can be enhanced by combining the polyamide resin with heat stabilizers of the zinc stearate and the barium stearate and the paint has no foaming, crack and falling after baked at 210DEG C, so that the coating effect of the automobile body can be improved and the service life of the automobile body can be prolonged. The PVC stone-bumping resistant paint has no lead salt heat stabilizers and avoids the damage to the environment and human body; and the produced PVC stone-bumping resistant paint has excellent performance and can carry out the multilayer anticorrosion protection of the body and the bottom of the automobile.

Description

1. Technical Field [0001] The invention relates to a PVC anti-stone-strike paint for protecting the bottom of an automobile body and a preparation method thereof, and belongs to the technical field of chemical compositions. 2. Background technology [0002] PVC anti-stone impact coating is used on the underside of the car, the fender and other parts to prevent the car body from being corroded by the impact of gravel, mud and sand during the driving process, and to improve the anti-corrosion, shock resistance and heat insulation performance of the car body. [0003] The currently widely used PVC anti-stone-strike paint has certain baking resistance, but its sagging and over-baking properties are not good. After the PVC anti-stone-strike paint is sprayed, it vibrates on the conveyor belt with the car body, causing the coating to sag, and the thickness is uneven, which affects the anti-stone-strike effect and beauty. When baking and shaping, the local temperature on both sides of the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D127/06C09D7/12
Inventor 张富平蔡金芳王强史永亮
Owner SHAANXI DADI IND CO LTD OF CHINA NAT NUCLEAR
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