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Water-based protective spray film

A spray film and water-based technology, applied in the direction of coating, etc., can solve the problems of reduced tearability, damage to the original car paint, monotonous color, etc., and achieve good protection function, good weather resistance, and high transparency.

Active Publication Date: 2018-06-26
广州驰彩汽车科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing car color changing products are stickers, and there is adhesive behind the stickers, but this product has the problem of easy degumming and monotonous color
However, the tearability of the color-changing sticker will be reduced under long-term use, and it will damage the original car paint

Method used

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Examples

Experimental program
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Effect test

preparation example Construction

[0030] The preparation process of aliphatic polyester polyurethane of the present invention is:

[0031] (1) Add organic dibasic acid and polyhydric alcohol into a 500mL four-necked flask, pass nitrogen gas until the air is completely exhausted, then heat to 155°C, keep warm for 1h, then heat the flask to 230°C, keep warm for 3h, Analyze the acid value and hydroxyl value, stop the reaction when the number average molecular weight reaches about 2000, and obtain the first step product;

[0032] (2) In a three-neck flask equipped with a mechanical stirrer, a thermometer, and a condenser tube, add the product of the first step and polyisocyanate containing ether bonds, heat to 60°C, keep the temperature for 2 hours, then add dimethylolpropionic acid and 2 Drop dibutyltin dilaurate, heat up to 85°C, keep warm for 3h, then add N-methylpyrrolidone, react for 3h, then cool down to 40°C, add triethylamine and stir quickly, disperse in deionized water, and vacuum dry , that is.

[003...

Embodiment

[0087] a1 Aliphatic polyester polyurethane, prepared from raw materials containing organic dibasic acids, polyols and polyisocyanates. Among them, the organic dibasic acid is dodecanedioic acid, the polyol is ethylene glycol, and the polyisocyanate is 4',5'-diisocyanate benzo-15-crown-5.

[0088] The preparation process of 4',5'-benzo-15-crown-5 diisocyanate is as follows:

[0089] (1) Weigh 10 mL of pentaethylene glycol and place it in a 250 mL double-necked flask equipped with a reflux condenser, add 50 mL of thionyl chloride and 3 drops of DMF. Heating to reflux for 15 hours, cooling to room temperature after the reaction, and drying the thionyl chloride with a rotary evaporator to obtain dichloropentaethylene glycol.

[0090] (2) Put 0.01mol 4,5-diaminocatechol and 0.012mol dichloropentaethylene glycol in a 250mL round bottom flask, then add 0.01mol sodium hydroxide and 0.005mol lithium hydroxide, and use 100mL butanol as Solvent, heated to reflux for 2h. After the reac...

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PUM

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Abstract

The invention relates to a novel aqueous protective spray film. The novel aqueous protective spray film is prepared from a component A and a component B, wherein the weight ratio of the component A to the component B is (3 to 8): 12; the component A contains the substances in parts by weight: 30-40 parts of aliphatic polyester polyurethane and 60-70 parts of water; the component B contains the substances in parts by weight: 75-90 parts of modified aqueous polyurethane resin, 0.5-5 parts of adjuvant and 5-15 parts of water; the modified aqueous polyurethane resin is subjected to grafting modification by a vinyl sulfocompound.

Description

technical field [0001] The invention relates to the technical field of painting, in particular to a water-based protective spray film. Background technique [0002] Automobile is one of the modern means of transportation, and more than 90% of its outer surface is painted. The quality of the coating (appearance, gloss, color, etc.) is people's intuitive evaluation of the quality of the car, which directly affects the market competitiveness of the car. In addition, painting is also one of the main measures to improve the corrosion resistance of automobile products and prolong the service life of automobiles. Therefore, the automobile manufacturing industry pays more and more attention to the painting of products, especially the painting of automobile body has become one of the most important processes of automobile manufacturing. [0003] The purpose of automobile painting is to make the automobile have excellent corrosion resistance and high decorative appearance, so as to ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D151/08C09D175/06C09D7/40
CPCC08L2201/10C08L2203/16C09D7/41C09D7/61C09D151/08C08L75/06
Inventor 曹启林曹启升
Owner 广州驰彩汽车科技有限公司
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