Ultraviolet curing adhesive for temporary protection in aluminum surface anodizing process and preparation method thereof

A treatment process and temporary protection technology, applied in the direction of adhesives, adhesive types, polyurea/polyurethane adhesives, etc., can solve problems such as high labor costs, difficult to improve yield, rubber plug breakage, etc., and achieve precise automation control , high efficiency and yield, not easy to break

Active Publication Date: 2015-12-23
TONSAN ADHESIVES INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method has low efficiency and high labor cost, and during the process of pulling out the rubber plug, the rubber plug is easy to break in the screw hole, and the yield rate is difficult to improve; while the aluminum surface does not need to be anodized, it is pasted with film or tape Temporary protection is carried out in the form of temporary protection, and it is also more dependent on the professional level of workers. The low efficiency of the entire anodizing section is increasingly unable to meet the needs of rapid and efficient production in the electronics industry.

Method used

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  • Ultraviolet curing adhesive for temporary protection in aluminum surface anodizing process and preparation method thereof
  • Ultraviolet curing adhesive for temporary protection in aluminum surface anodizing process and preparation method thereof
  • Ultraviolet curing adhesive for temporary protection in aluminum surface anodizing process and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Synthesis of polyester polyurethane acrylate PUA-1: 100 grams of polyester diol with a molecular weight (Mn) of 1000 and a hydroxyl value of 112 was vacuum dehydrated at 120°C for 1 hour, and the dehydrated polyester diol , 26.64 grams of isophorone diisocyanate and 10 grams of isobornyl acrylate are put into the reaction kettle together, add 0.1 grams of dibutyltin dilaurate, react at 78 ° C for 3 hours, add 7.8 grams of hydroxyethyl methacrylate, 0.1 gram of hydroquinone as a polymerization inhibitor, continue to react at 78°C for 2 hours, cool to 45°C and discharge, which is called PUA-1.

Embodiment 2

[0025] Synthesis of polyester polyurethane acrylate PUA-2: 100 grams of polyester diol with a molecular weight (Mn) of 2000 and a hydroxyl value of about 56 was vacuum dehydrated at 120°C for 1 hour, and the dehydrated polyester diol Alcohol, 13.32 grams of isophorone diisocyanate and 10 grams of isobornyl acrylate were put into the reaction kettle together, 0.1 gram of dibutyltin dilaurate was added, reacted at 78 °C for 3 hours, and 6 grams of hydroxypropyl methacrylate was added, 0.2 g of hydroquinone is used as a polymerization inhibitor, continue to react at 78°C for 2 hours, cool to 45°C and discharge, which is called PUA-2.

Embodiment 3-7

[0027] The PUA-1 and PUA-2 prepared in Example 1 and Example 2 are used as polyester polyurethane acrylate components, and the proportions are carried out according to the contents of each component in Table 1, and they are stirred and mixed in a planetary stirring tank until uniform, and then pumped Vacuum defoaming, discharge.

[0028] Table 1

[0029]

[0030]

[0031] Note: TS-720 and TS-530 are the trademarks of CABOT; R202 is the trademark of Evonik AEROSIL.

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Abstract

The invention relates to an ultraviolet curing adhesive for temporary protection in the aluminum surface anodizing process. The ultraviolet curing adhesive comprises, by weight, 30-70 parts of polyester type polyurethane acrylic resin, 5-50 parts of a (methyl)acrylic acid reactive diluent, 0.1-6 parts of a photoinitiator, 0.1-10 parts of a thixotropic agent and 0.1-3 parts of a coupling agent. The ultraviolet curing adhesive can achieve machine adhesive dispensing, and is more precise in automatic control, higher in efficiency and lower in cost; meanwhile, after anodizing is performed, the ultraviolet curing adhesive is removed more easily and is not likely to be broken, and higher in efficiency and yield, and the ultraviolet curing adhesive can completely meet the requirement for production and using of full-lamination modules.

Description

technical field [0001] The invention relates to the field of polymer materials, in particular to a temporary protection material during anodic treatment of aluminum surfaces. Background technique [0002] In just a few years, the mobile Internet has penetrated into all aspects of social life and has had a huge impact. As an important carrier of the Internet, handheld devices such as notebook computers, tablet computers, and smart phones are developing faster and faster. Due to its excellent thermal conductivity, low density and high strength, aluminum is widely used in the casing and keyboard frame of notebook computers, tablet computers and mobile phone casings. When aluminum is used in these aspects, the surface must be anodized, that is, a dense oxide film is formed on the aluminum surface through anodization. The outer layer of the anodized aluminum film is porous and easy to absorb dyes and colored substances, so it can be dyed. Improve its decorative properties, whil...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J175/14C09J11/04C09J11/06C08G18/67C08G18/42
Inventor 赵迎波何利军李守平
Owner TONSAN ADHESIVES INC
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