High-brightness impact-resistant aluminum epoxy repair adhesive and preparation method thereof

An impact-resistant and repairing adhesive technology, used in epoxy resin adhesives, adhesives, carboxyl rubber adhesives, etc., can solve the problems of low aging resistance, reduced processing performance, low impact resistance, etc., to achieve good thermal conductivity and Effects of thermal stability, improved shear impact strength, good machinability

Inactive Publication Date: 2011-02-16
YANTAI DARBOND TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The general aluminum epoxy repair adhesive cured product is brittle, with low impact resistance and poor aging resistance; the aluminum repair adhesive with better impact resistance is mostly modified by acrylic acid, polyurethane and carboxyl-terminated liquid nitrile rubber. Epoxy resin, but these modification methods improve the impact resistance of aluminum epoxy repair glue, but at the same time, the glass transition temperature of the cured product is greatly reduced; at the same time, because the modified product is mostly elastomer rubber, it has a large The viscoelasticity and viscous force of the resin greatly increase the viscosity of the resin, and it is difficult to fill a large amount of metal aluminum powder, which increases the difference in properties between the cured repair adhesive and the aluminum substrate, and reduces the processing performance; and the glue liquid flows when the temperature is high 1. When the temperature is low, it becomes hard, which makes the construction performance of the aluminum repair adhesive worse, and it is not easy to mix evenly.
[0005] Vehicle parts are mostly in high and low temperature alternating working conditions. Generally, repair adhesives have poor thermal stability and low aging resistance, and it is difficult to meet the harsh environment of long-term cold and hot alternating shocks.

Method used

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  • High-brightness impact-resistant aluminum epoxy repair adhesive and preparation method thereof
  • High-brightness impact-resistant aluminum epoxy repair adhesive and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] 1. Aluminum silver powder pretreatment: Weigh 200g of 1,6-hexanediol diglycidyl ether and 350g of E-51 epoxy resin, put them in a 2000mL glass beaker, add KH56050g, stir with a glass rod for 5 minutes, add non-floating Type aluminum silver powder 400g, stir and wet with a glass rod for 10 minutes; let it stand for 2 hours, stir for another 10 minutes, let stand for 24 hours to get a thick paste of aluminum silver powder, set aside;

[0033] 2. Preparation of component A: Weigh 200g of E-51 epoxy resin, place it in a 2L double planetary power mixing kettle with a high-speed dispersion disc and a low-speed scraping mixer, heat to 90°C and control the temperature; weigh Rubber particle modified E-51 epoxy resin 150g, stirred at 1000 rpm for 60 minutes; stopped heating, added 100g of spherical alumina powder, stirred at 800 rpm for 30 minutes, cooled to 40°C and controlled temperature; add 300g of spherical metal aluminum powder and stir for 20 minutes at 500 rpm; add gas-p...

Embodiment 2

[0037] 1. aluminum silver powder pretreatment (with embodiment 1)

[0038] 2. Preparation of component A: Weigh 112.5g of E-51 epoxy resin, place it in a 2L double planetary dynamic mixing kettle with a high-speed dispersing disc and a low-speed scraping edge mixer, heat to 90°C and control the temperature; weigh Nano-rubber particles modified E-51 epoxy resin 250g, stirred at 1100 rpm for 60 minutes; stop heating, added 77.5g of spherical alumina powder, stirred at 900 rpm for 30 minutes, cooled to 40°C And control the temperature; add 280g of spherical metal aluminum powder, stir for 20 minutes at 500 rpm; add gas phase method SiO 2 30g, stirred at 700 rpm for 20 minutes; then added 250g of pretreated aluminum-silver powder slurry, controlled temperature at 40°C, stirred at 700 rpm for 15 minutes; controlled temperature at 40°C; evacuated to 0.09MPa and Minutes stirred for 30 minutes, discharged to obtain component A.

[0039] 3. Preparation of component B: weigh polyether...

Embodiment 3

[0042] 1. Aluminum silver powder pretreatment method is the same as embodiment 1.

[0043] 2. Preparation of component A: Weigh 256.2g of E-51 epoxy resin, place it in a 2L double planetary dynamic mixing kettle with a high-speed dispersing disc and a low-speed scraping edge mixer, heat to 90°C and control the temperature; weigh Nano-rubber particles modified E-51 epoxy resin 168.8g, stirred at 900 rpm for 60 minutes; stop heating, added 120g of spherical alumina powder, stirred at 700 rpm for 30 minutes, cooled to 40°C And temperature control; add spherical aluminum powder 280g, stir at 700 rpm for 20 minutes, add gas phase method SiO 2 50g, stirred at 500 rpm for 20 minutes; then added 125g of pretreated aluminum-silver powder slurry, controlled temperature at 40°C, stirred at 500 rpm for 15 minutes; controlled temperature at 40°C; evacuated to 0.09MPa and Minutes stirred for 30 minutes, discharged to obtain component A.

[0044] 3. Preparation of component B: Weigh 250g o...

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PUM

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Abstract

The invention relates to high-brightness impact-resistant aluminum epoxy repair adhesive and a preparation method thereof. The epoxy repair adhesive is composed of component A and component B based in the weight ratio of 100:12.5-16.6 (i.e. 8:1-6:1), wherein the component A is composed of the following raw materials in weight ratio: 16-30 parts of bisphenol A epoxy resin, 15-25 parts of superfine full-vulcanized carboxylic nitrile butadiene rubber particle modified bisphenol A epoxy resin, 2.5-5 parts of an epoxy resin reactive diluent, 0.6-1.2 parts of a coupling agent, 28-32 parts of spherical metallic aluminum powder, 7-12 parts of spherical-like alumina powder, 5-10 parts of aluminum powder and 3-5 parts of white carbon black; and the component B is composed of the following raw materials in weight ratio: 6-10 parts of aminoethyl piperazine, 10-15 parts of isophorone diamine, 30-40 parts of modified aromatic amine, 25-35 parts of polyether amine, 9-15 parts of spherical-like alumina powder and 3-6 parts of white carbon black. The preparation method comprises the steps of preparation of the component A and the component B; and the component A and the component B are mixed according to the ratio when in use.

Description

technical field [0001] The invention relates to an epoxy repair adhesive, in particular to a high-brightness impact-resistant aluminum epoxy repair adhesive and a preparation method thereof, belonging to the technical field of adhesives. Background technique [0002] More and more modern vehicle parts and engine parts are manufactured by aluminum alloy die-casting process. Aluminum alloy die-casting parts have the characteristics of high precision, complex molding and good brightness. It is difficult to avoid air holes, trachoma, scratches, dimensional tolerances and wear in the manufacture and use of die-casting aluminum. Epoxy resin type aluminum metal repair glue has excellent bonding and repairing properties, and has the advantages of high mechanical strength, corrosion resistance, and firm adhesion to metal substrates. It is suitable for repairing and repairing aluminum alloy castings. [0003] Generally, aluminum epoxy repair glue is composed of epoxy resin curing sys...

Claims

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Application Information

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IPC IPC(8): C09J113/00C09J11/06C09J163/02C09J11/04C09J109/02
Inventor 刘铁钢王建斌解海华
Owner YANTAI DARBOND TECH
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