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Gasoline-resistant powder paint

A powder coating, gasoline-resistant technology, applied in powder coatings, anti-corrosion coatings, polyester coatings, etc., can solve the problems of obviousness, loss of gloss, coating film drop, etc., and achieve the effect of avoiding loss of gloss and good resistance to gasoline erosion

Inactive Publication Date: 2016-01-06
ANHUI SHENJIAN NEW MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] As we all know, the vast majority of cars currently use the combustion of gasoline as power, so it is inevitable that they will come into contact with gasoline when using the car. Because gasoline contains a large amount of aromatic hydrocarbons, conventional powder coatings will lose their luster after contact. Chromatic aberration, and even long-term contact may cause coating film to fall off, etc.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] A gasoline-resistant powder coating, comprising the following components in mass percentages:

[0027]

[0028]

[0029] The polyester resin is a carboxyl-terminated saturated polyester resin;

[0030] Described polyester resin comprises following weight part raw material:

[0031]

[0032] The esterification catalyst is monobutyltin oxide.

[0033] The preparation method of described polyester resin, comprises the following steps:

[0034] (1) Put 1,500 parts by mass of neopentyl glycol and 50 parts of trimethylolpropane into a reaction kettle, heat to 120° C. to melt, stir and mix;

[0035] (2) Add 2400 parts of terephthalic acid and 5 parts of esterification catalyst; heat to 240°C to maintain the reaction until the reactant is clear, take a sample, and the acid value of the test sample is 10.5 mgKOH / g;

[0036] (3) Cool down to 180°C, then add 100 parts of trimellitic anhydride and 540 parts of isophthalic acid, raise the temperature to 220°C and maintai...

Embodiment 2

[0039] A gasoline-resistant powder coating, comprising the following components in mass percentages:

[0040]

[0041] Described polyester resin comprises following weight part raw material:

[0042]

[0043] The esterification catalyst is monobutyltin oxide.

[0044] The preparation method of described polyester resin is:

[0045] (1) Put 1,800 parts by mass of neopentyl glycol and 70 parts of trimethylolpropane into the reaction kettle, heat to 130°C to melt, stir and mix;

[0046] (2) Add 3000 parts of terephthalic acid and 9 parts of esterification catalyst; heat to 220-240 ° C to maintain the reaction until the reactant is clear, take a sample, and the acid value of the test sample is 10.5 mgKOH / g;

[0047] (3) Cool down to 200°C, then add 140 parts of trimellitic anhydride and 180 parts of isophthalic acid, raise the temperature to 220°C and maintain until the reactants are clear, and the acid value is 63.6mgKOH / g by sampling;

[0048] (4) Vacuumize for 3.5 hour...

Embodiment 3

[0050] A gasoline-resistant powder coating, comprising the following components in mass percentages:

[0051]

[0052] Described polyester resin comprises following weight part raw material:

[0053]

[0054]

[0055] The esterification catalyst is monobutyltin oxide.

[0056] The preparation method of described polyester resin is:

[0057] (1) Put 1,400 parts by mass of neopentyl glycol and 50 parts of trimethylolpropane into a reaction kettle, heat to 100°C to melt, stir and mix;

[0058] (2) Add 2300 parts of terephthalic acid and 6 parts of esterification catalyst; heat to 220-240 ° C to maintain the reaction until the reactant is clear, take a sample, and the acid value of the test sample is 10.5 mgKOH / g;

[0059] (3) Cool down to 180°C, then add 140 parts of trimellitic anhydride and 120 parts of isophthalic acid, raise the temperature to 220°C and maintain until the reactants are clear, and the acid value is 63.6mgKOH / g by sampling;

[0060] (4) Vacuumize fo...

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Abstract

The invention discloses gasoline-resistant powder paint, which is prepared from the components: 50-70% of polyester resin, 5.5-8% of curing agent, 0.8-1.2% of levelling agent, 0.8-20% of pigment, 20-42% of inorganic filler, and 0-3% of auxiliary agent. Compared with the prior art, by preparing polyester resin with high crosslinking density and controlling the use ratio of the polyester resin and the curing agent, the prepared powder paint has very good characteristic of gasoline erosion resistance, and the powder paint can be well applied to the aspects of automobile products and automobile parts. The phenomena of gloss loss, fading and falling when contacting gasoline after the ink is sprayed to the automobile parts are avoided.

Description

technical field [0001] The invention belongs to the field of coatings, and in particular relates to a gasoline-resistant powder coating. The coating has a good protective effect on gasoline corrosion. After the gasoline is corroded, the surface of the coating film does not lose its luster and the color difference basically does not change. Background technique [0002] Powder coating is a newly developed new type of coating. It has a series of superior properties such as excellent chemical resistance, flexibility, strong adhesion, mechanical strength, excellent decoration, and low pollution. It is widely used in building materials, household appliances, oil and gas pipelines, instruments and meters, medical machinery, mechanical and electrical products, and its varieties and types are becoming more and more perfect. [0003] In addition, powder coatings are also widely used in auto parts, such as auto chassis, auto wheel primer, auto fuel tank and so on. Moreover, with the ...

Claims

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Application Information

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IPC IPC(8): C09D167/00C09D7/12C09D5/03C09D5/08C08G63/20
Inventor 汪俊
Owner ANHUI SHENJIAN NEW MATERIALS
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