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Water-based self-repairing coating and coating layer for TPU invisible car cover

A self-healing, water-based technology, used in coatings, polyurea/polyurethane coatings, etc., can solve the problems of high health hazards for construction workers, harm to the health of construction workers, and narrow range of high and low temperature resistance. The effect of high drop angle and easy control

Active Publication Date: 2021-05-25
广州昊毅新材料科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] my country's invisible car cover technology started late and is still in the development stage. The invisible car cover currently used is mainly coated on TPU (thermoplastic polyurethane elastomer rubber) material, and the scratch-resistant and wear-resistant oily coating is used to protect the car paint. , but the harm to the environment and the health of the construction personnel from the VOC emission of the coating has always been a headache for this type of product, and it is flammable and explosive, which poses a great safety hazard
[0003] In general, the current TPU invisible car coating still has the following shortcomings: 1) high VOC content; 2) short service life, it needs to be prepared and used immediately, and cannot be used overnight; 3) long repair time, high and low temperature resistance Narrow range; 4) Flammable and explosive; 5) Great harm to the environment; 6) Great harm to the health of construction workers

Method used

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  • Water-based self-repairing coating and coating layer for TPU invisible car cover
  • Water-based self-repairing coating and coating layer for TPU invisible car cover
  • Water-based self-repairing coating and coating layer for TPU invisible car cover

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0059] The amount of raw materials used to prepare the water-based self-healing polyurethane resin material in this example is shown in Table 1.

[0060] The raw material consumption of table 1 embodiment 1 waterborne self-healing polyurethane resin

[0061] raw material parts by mass PTMEG2000 50 PCDL1000 8 Polymerized castor oil polyol D-290 5 TMXDI 10 IPDI 15 1,3-Propanediol 5 DMPA 3 Organic Bismuth Catalyst 0.5 DMEA 1 acetone 20 Deionized water 50

[0062] The preparation method of the water-based self-healing polyurethane resin of this example is as follows:

[0063] In a four-necked reaction flask equipped with a thermometer stirrer, add PTMEG2000, PCDL1000 and polymerized castor oil polyol D-290 according to the formula dosage in Table 1, heat up to 90-105°C, and vacuum dehydrate for 1.5-2 hours , lower the temperature to 50°C and install a condenser tube, add IPDI, TMXDI, 1,3-propanediol ...

Embodiment 2

[0065] The amount of raw materials used in the preparation of the water-based self-healing polyurethane resin material in this example is shown in Table 2.

[0066] The raw material consumption of table 2 embodiment 2 aqueous self-healing polyurethane resins

[0067] raw material parts by mass PTMEG3000 50 PCDL2000 8 Polymerized castor oil polyol D-290 5 TMXDI 10 IPDI 15 1,4-Butanediol 5 DMPA 3 Catalyst organotin 0.5 DMEA 1 acetone 20 Deionized water 50

[0068] The preparation method of the water-based self-healing polyurethane resin of this example is as follows:

[0069] In a four-necked reaction flask equipped with a thermometer stirrer, add PTMEG3000, PCDL2000 and polymerized castor oil polyol D-290 according to the formula dosage in Table 2, heat up to 90-105°C, and vacuum dehydrate for 1.5-2 hours , lower the temperature to 50°C and install a condenser tube, add IPDI, TMXDI, 1,4-butanediol...

Embodiment 3

[0071] The amount of raw materials used to prepare the water-based self-healing polyurethane resin material in this example is shown in Table 3.

[0072] The raw material consumption of table 3 embodiment 3 waterborne self-healing polyurethane resins

[0073]

[0074]

[0075] The preparation method of the water-based self-healing polyurethane resin of this example is as follows:

[0076] In a four-necked reaction flask equipped with a thermometer stirrer, according to the formula dosage in Table 3, add PTMEG1000, PCDL3000 and polymerized castor oil polyol D-290 to heat up to 90-105 ° C, vacuum dehydration for 1.5-2 hours , lower the temperature to 50°C and install a condenser tube, add IPDI, TMXDI, 1,6-hexanediol and organotin T-12 catalyst, pass in nitrogen, keep warm at 70°C for 1 hour, then slowly raise the temperature to 80-85°C, keep warm 3.5-4 hours. Then add DMPA slowly, raise the temperature to 85-105°C, and then keep it warm for 1-1.5 hours until the detected...

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Abstract

The invention discloses a water-based self-repairing coating and a coating layer for a TPU invisible car cover. The water-based self-repairing coating comprises water-based self-repairing polyurethane resin, and the water-based self-repairing polyurethane resin is prepared from the following components: polytetramethyl ether glycol, polycarbonate diol, polymerized castor oil polyol, polyisocyanate, chain extenders, a catalyst, a neutralizer and water, wherein the polyisocyanate comprises an alicyclic isocyanate and an aliphatic isocyanate, and the chain extenders comprise a lipophilic chain extender and a hydrophilic chain extender. The water-based self-repairing polyurethane resin provided by the invention is excellent in performance, and the coating layer formed by the coating containing the water-based self-repairing polyurethane resin has excellent weather resistance and good rebound resilience, can realize instant repair of a TPU invisible car cover coating film after damage, and is high in pollution resistance, good in carburetor cleaning agent resistance, excellent in water spot and water stain resistance, high in water drop angle and excellent in smoothness.

Description

technical field [0001] The invention relates to the technical field of polymer materials, in particular to a water-based self-repairing coating and a coating used for TPU invisible car coverings. Background technique [0002] my country's invisible car cover technology started late and is still in the development stage. The invisible car cover currently used is mainly coated on TPU (thermoplastic polyurethane elastomer rubber) material, and the scratch-resistant and wear-resistant oily coating is used to protect the car paint. , but the hazards of VOC emissions from the coating to the environment and the health of construction workers have always been a headache for this type of product, and it is flammable and explosive, and has great safety hazards. [0003] In general, the current TPU invisible car coating still has the following shortcomings: 1) high VOC content; 2) short service life, it needs to be prepared and used immediately, and cannot be used overnight; 3) long rep...

Claims

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Application Information

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IPC IPC(8): C08G18/12C08G18/36C08G18/40C08G18/44C08G18/48C08G18/66C08G18/76C08G18/34C09D175/04
CPCC08G18/6625C08G18/4018C08G18/4854C08G18/44C08G18/36C08G18/12C08G18/7642C09D175/04C08G18/348
Inventor 张国华谢洋黄华
Owner 广州昊毅新材料科技股份有限公司
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