Two-component polyurethane coating used for automobile and preparation method thereof

A two-component polyurethane and coating technology, used in anti-corrosion coatings and other directions, can solve problems such as yellowing, and achieve the effects of improving gloss, improving weather resistance and stone resistance, and improving interlayer adhesion.

Inactive Publication Date: 2011-04-13
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Diphenylmethane diisocyanate (MDI) is also widely used in the paint industry, but it also has the problem of yellowing, so it can only be used in dark interior paints

Method used

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  • Two-component polyurethane coating used for automobile and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] In terms of mass percentage, the content of each raw material component of a two-component polyurethane coating A component mixture for automobiles is:

[0044] RT-9020 30%

[0045] PBA2000 8%

[0046] Barium Sulfate 10%

[0047] Talc 8%

[0048] Calcium Carbonate 2%

[0049] Titanium dioxide 12%

[0050] Carbon black 0.06%

[0051] Zinc Phosphate 9%

[0052] Aluminum tripolyphosphate 3%

[0053] Zinc powder 1.8%

[0054] Anti-Terra-203 1.5%

[0055] BYK-310 2%

[0056] T-12 0.64%

[0057] UV1130 2%

[0058] Mixed solvent 10%

[0059] Hydroxy acrylic resin is RT-9020 produced by Jiangsu Rongtai Chemical Co., Ltd. The linear saturated polyester is PBA2000 (sold by Guangzhou Petrochemical General Factory). Fillers are barium sulfate, talc and calcium carbonate. The coloring pigments are titanium dioxide and carbon black. The anticorrosion pigments are zinc phosphate, aluminum tripolyphosphate and zinc powder. Additives include wetting and dispersing agent...

Embodiment 2

[0065] In terms of mass percentage, the content of each raw material component of a two-component polyurethane coating component A mixture is:

[0066] RT-9020 33%

[0067] PBA2000 9%

[0068] Barium Sulfate 8%

[0069] Talc 7%

[0070] Calcium Carbonate 1%

[0071] Titanium dioxide 10%

[0072] Carbon black 0.1%

[0073] Zinc Phosphate 9%

[0074] Aluminum tripolyphosphate 3%

[0075] Zinc powder 3%

[0076] Anti-Terra-203 1.3%

[0077] BYK-310 1.8%

[0078] T-12 0.8%

[0079] UV1130 3%

[0080] Mixed solvent 10%

[0081] Prepare the component A mixture according to the method and steps described in Example 1.

[0082] The B component mixture was prepared according to the recipe described in Example 1.

[0083] The diluent is ethylene glycol ethyl ether acetate:toluene:propylene glycol butyl ether=1:2:2.

[0084] According to the weight ratio A / B / thinner = 5 / 1 / 1, spray on the iron plate with anti-rust primer produced by DuPont, dry it for 5 minutes, and bake it a...

Embodiment 3

[0086] In terms of mass percentage, the content of each raw material component of a two-component polyurethane coating component A mixture is:

[0087] RT-9020 33%

[0088] PBA2000 8%

[0089] Barium Sulfate 10%

[0090] Talc 8%

[0091] Calcium Carbonate 4%

[0092] Titanium dioxide 11.9%

[0093] Carbon black 0.1%

[0094] Zinc Phosphate 9%

[0095] Aluminum tripolyphosphate 4%

[0096] Zinc powder 3%

[0097] Anti-Terra-203 1%

[0098] T-12 0.5%

[0099] UV1130 3%

[0100] Mixed solvent 4.5%

[0101] Prepare the component A mixture according to the method and steps described in Example 1.

[0102] The B component mixture was prepared according to the recipe described in Example 1.

[0103] The diluent is ethylene glycol ethyl ether acetate:toluene:propylene glycol butyl ether=1:2:2.

[0104] According to the weight ratio A / B / thinner = 5 / 1 / 1, spray on the iron plate with anti-rust primer produced by DuPont, dry it for 5 minutes, and bake it at 60°C for 30 minut...

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Abstract

The invention discloses a two-component polyurethane coating used for an automobile and a preparation method thereof. The coating comprises two components, namely a component A and a component B, and hydroxy acrylic resin in the component A and aliphatic series polyisocyanates in the component B are taken as the basic components, The preparation method comprises the following steps: adding linear saturated polyester, solvent, auxiliaries and color padding into the basic components, wherein the weight ratio of the component A to the component B is (2.5-5.5):1, the component A comprises hydroxide radical, the linear saturated polyester, wetting dispersing agent, catalyst, coloringpigment, padding, rust resisting pigment and solvent, and the component B comprises the aliphatic series polyisocyanates and solvent. The coating provided by the invention can be used for improving the glossiness of an under-coat coating, the adhesion between the layers of the under-coat coating and antirust primer, the weather fastness and stone-impact resistance of a solidified coating film, and the shock resistance and water resistance of the solidified coating film at the same time.

Description

technical field [0001] The invention relates to polyurethane coatings, in particular to a two-component polyurethane coating for automobiles and a preparation method thereof. technical background [0002] In countries with developed automobile industries, the amount of automotive coatings occupies an extremely important position in the output of coatings, generally second only to architectural coatings. But it accounts for the largest percentage of sales in coatings, higher than architectural coatings. Therefore, coating manufacturers in various countries attach great importance to the development trend and development of automotive coatings to meet the needs of the development of the automotive industry. The production and technology development of automotive coatings tend to be collectivized and internationalized. In the past 10 years, automotive coatings have made great progress in terms of weather resistance, stone chip resistance, appearance decoration, and high artist...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D175/06C09D5/08C09D5/10
Inventor 袁文辉常然然李莉
Owner SOUTH CHINA UNIV OF TECH
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