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A kind of structural adhesive for automobile and preparation method thereof

A technology for structural adhesives and automobiles, applied in the field of structural adhesives, can solve problems such as limited improvement in mechanical properties, complicated operation, and ablation of the adhesive layer, and achieve cross-tensile strength improvement, excellent mechanical properties, and increased shear strength. Effect

Inactive Publication Date: 2017-12-19
YANTAI DARBOND TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the problems of epoxy resin structural adhesives are high brittleness and insufficient impact peeling ability, etc. The methods used in the industry are limited to adding modified epoxy resin or toughening agent, which has limited improvement in mechanical properties.
However, this type of method is complicated to operate, requires special spot welding equipment, and the cost of glue for spot welding is high, and the glue layer is ablated during the welding process
At present, there is no report on the method of combining structural adhesives and low-melting point solders and simultaneously realizing adhesive bonding and welding

Method used

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  • A kind of structural adhesive for automobile and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] A preparation method of structural adhesive for automobiles, the steps are as follows:

[0041] (1) 19wt% epoxy resin E-51, 30wt% nanometer rubber modified epoxy resin (HH-0801), 3wt% polyethylene glycol diglycidyl ether, 18wt% nanometer calcium carbonate, 10wt% silicon micropowder, 1.5wt% siloxane coupling agent, 5wt% fumed silica, 2wt% hydrogenated castor oil, 3wt% dicyandiamide, 0.5wt% 4,4'methylene-bis(phenyldimethylurea) and Add 8wt% (0.2mm) reduced iron powder into a double planetary power mixer, stir and disperse at 5-35°C for 20-30 minutes to make each component evenly dispersed, vacuumize to below -0.09MPa and continue stirring for 60-90 minutes, Obtain epoxy resin glue A component;

[0042](2) Heat 3wt% rosin pentaerythritol ester to 130°C to make it melt, add 0.5wt% DBU caprylate and 1.5wt% imidazole derivatives, stir for 30-60min, continue to add 95wt% tin-bismuth alloy (42% Sn and 58% Bi), stirred at -0.09MPa for 30min, lowered to room temperature 20-25°C...

Embodiment 2

[0046] A preparation method of structural adhesive for automobiles, the steps are as follows:

[0047] (1) 15wt% epoxy resin E-51, 25wt% carboxy-terminated nitrile rubber modified epoxy resin, 7wt% polypropylene glycol diglycidyl ether, 25wt% nanometer calcium carbonate, 10wt% silica powder, 1wt% titanic acid Ester coupling agent, 3wt% hydrogenated castor oil, 2.5wt% sebacic acid dihydrazide, 1.5wt% dicyandiamide and 10wt% (0.2mm) stainless steel powder are added to the double planetary dynamic mixer, at 5 ~ 35 ℃ Stir and disperse for 20-30 minutes to make each component disperse evenly, vacuumize to below -0.09MPa and continue stirring for 60-90 minutes to obtain component A of epoxy resin glue;

[0048] (2) Heat 5wt% polyester polyol to 80°C to melt, add 0.5wt% imidazole derivatives, 1.1wt% glutaric acid and 1.4wt% triethanolamine, stir for 30-60min, continue to add 92wt% alloy solder (48 %Bi, 9%Sb, 28.5%Pb and 14.5%Sn), stirred at -0.09MPa for 30min, lowered to room temper...

Embodiment 3

[0052] A preparation method of structural adhesive for automobiles, the steps are as follows:

[0053] (1) 30wt% epoxy resin E-55, 15wt% nano-rubber modified epoxy resin (MX-125), 4wt% butanediol diglycidyl ether, 20wt% nanometer calcium carbonate, 15wt% aluminum oxide, 1wt% % titanate coupling agent, 3wt% organobentonite, 2wt% fumed silica, 4wt% 1-o-phenylbiguanide and 6wt% (0.2mm) nickel powder are added to the double planetary dynamic mixer, at 5 ~ 35 ℃ Stir and disperse under the same conditions for 20-30 minutes to make the components dispersed evenly, vacuumize to below -0.09MPa and continue stirring for 60-90 minutes to obtain component A of epoxy resin glue;

[0054] (2) Heat 6wt% ethylene-vinyl acetate copolymer at 100°C to melt, add 2wt% methyl imidazolium butyrate, 1.5wt% DBU phenate and 0.5wt% citric acid, stir for 30-60min, continue to add 90wt% Tin-bismuth alloy (42% Sn and 58% Bi), stirred at -0.09MPa for 30min, lowered to 20-25°C, ground and dispersed, sealed ...

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Abstract

The invention belongs to the technical field of structural adhesives, and in particular relates to a structural adhesive for automobiles and a preparation method thereof. In the present invention, metal particles are added to the epoxy resin adhesive component, which can adjust the thickness of the adhesive layer, and at the same time play the role of destroying the surface oxide layer and promoting welding; mixing the epoxy resin adhesive with the solder can effectively wet the surface of the metal component, And a firm solder joint is formed between the metal components, and the soldering and curing processes have a synergistic effect; the structural adhesive for automobiles of the present invention realizes the soldering of metal solder while the epoxy resin adhesive is solidified, and has excellent mechanical properties. Changes, T-peel strength is increased by 30%, cross tensile strength is increased by 20% to 55%, and shear strength is increased by 10% to 30%. It can be effectively used in the structural bonding of automotive body-in-white metal components, such as vehicle structural bonding. Bonding, door and floor bonding, folded structural bonding, etc.

Description

technical field [0001] The invention belongs to the technical field of structural adhesives, in particular to a structural adhesive for automobiles and a preparation method thereof. Background technique [0002] With the development of automobile lightweight technology, numerous polymer adhesive materials have been developed and applied. Among them, structural bonding materials are used to replace traditional methods such as riveting and welding, which can greatly reduce the weight under the premise of ensuring structural strength. At present, the structural adhesives used in domestic and foreign automobile production mainly include epoxy resin adhesives, polyurethane adhesives, polyacrylate adhesives, polyvinyl chloride adhesives, etc., in order to achieve higher impact strength The mechanical properties such as elastic modulus and elastic modulus are often modified by different types of polymer materials, and the performance improvement is often limited, which cannot meet...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09J163/00C09J11/04C09J11/06C09J11/08
Inventor 甘俊杰姜贵琳王建斌陈田安解海华
Owner YANTAI DARBOND TECH
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