Adhesive, its preparation method and application method

A technology of adhesives and toughening agents, applied in the direction of adhesives, chemical instruments and methods, adhesive types, etc., can solve the problem of low initial viscosity of adhesives, achieve wide use temperature range, high bonding strength, The effect of improving appearance performance

Active Publication Date: 2012-04-18
BYD CO LTD
3 Cites 35 Cited by

AI-Extracted Technical Summary

Problems solved by technology

[0007] In order to overcome the problem of low initial viscosity of the adhesive in the prior art, the present invention disclos...
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Method used

As can be seen from the test results of table 1, the initial bond strength of adhesive provided by the invention has been greatly improved, and spot welding or riveting is not required between the steel plates bonded by this adhesive , greatly improving the appearance performance of the product.
In the present invention, in the curing component that adopts, contain normal temperature curing agent at least, adopt this normal temperature curing agent to combine the system of aforementioned first epoxy resin and the second epoxy resin, can make the adhesive that prepares The initial bonding strength of the agent is high at room temperature. The above-mentioned normal temperature curing agent is a variety of curing agents known in the prior art that can cure epoxy resins at normal temperatures. For example, the normal temperature curing agent is selected from polyamide, triethylenetetramine, diethylenetriamine, One or more of polyethylene polyamine, hexamethylenediamine, diethylaminopropylamine, m-phenylenediamine, and amino-terminated polyetheramine; preferably one of polyamide, triethylenetetramine, and amino-terminated polyetheramine one or more species. The above-mentioned curing components are used to cure the resin components, and their content can vary within a wide range. Preferably, in order to further ensure the initial bond strength of the adhesive, the normal temperature curing agent is based on the content of the main resin. The content is 10-50wt%, preferably 25-45wt%.
Simultaneously, as can be seen from the test result of table 2, in the binding agent disclosed by the present invention, by adopting polyurethane, amino-terminated polyether amine modified epoxy resin prepolymer and carboxyl-terminated nitrile rubber jointly as enhancing ...
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Abstract

The invention provides an adhesive, its preparation method and an application method. The adhesive contains a resin ingredient and a cured ingredient, wherein the resin ingredient contains a main resin, a flexibilizer and a filling material. The main resin contains a first epoxy resin and a second epoxy resin, wherein epoxy equivalent of the first epoxy resin is 150-300 and softening point of the second epoxy resin is 65-100 DEG C. The cured ingredient contains a normal-temperature curing agent. After the adhesive is coated on the surface of steel plates, the bonding strength between the steel plates is very high without the need of spot welding or riveting.

Application Domain

LaminationLamination apparatus +1

Technology Topic

Steel platesChemistry +6

Examples

  • Experimental program(9)
  • Comparison scheme(5)

Example Embodiment

[0028] The present invention also discloses a preparation method of the above-mentioned adhesive, including: mixing the main resin, toughening agent and filler, grinding and defoaming to obtain a resin component; and using a normal temperature curing agent as the curing component to obtain the adhesive. The above-mentioned mixing and grinding methods are well-known in the art, for example, they can be rolled into a uniform paste on a three-roll mill.
[0029] In the above method, when one or more of the coupling agent, thixotropic agent, and heat-resistant agent is contained, one or more of the coupling agent, thixotropic agent, and heat-resistant agent can be combined with the host resin , Toughener and filler are mixed together, ground and defoamed to obtain resin component. Similarly, when it is necessary to use a high temperature curing agent and a curing accelerator, it also includes mixing the high temperature curing agent and the curing accelerator with the normal temperature curing agent to obtain the curing component.
[0030] During the mixing, the content of each component added is as described above, and will not be repeated here.
[0031] At the same time, the present invention also discloses the use method of the above-mentioned adhesive, including: mixing the resin component and the curing component uniformly, and then coating on the surface to be bonded of the steel plate substrate to form a 0.5-1.5mm thick adhesive After forming the layer, press the surfaces of the steel plate substrate to be bonded to each other, keeping the pressure at 0.1-0.5Mpa, and leave it for 10-25h.
[0032] In order to further improve the mechanical properties of the adhesive after bonding, the curing component also includes a high-temperature curing agent and a curing accelerator, and after the above-mentioned pressing and placing, the steel plate substrate after pressing Bake at 160-210℃ for 20-100min.

Example Embodiment

[0034] Example 1
[0035] This example is used to illustrate the adhesive disclosed in the present invention and its preparation method.
[0036] Combine 80 parts by weight of epoxy resin E-42 (produced by Guangzhou Hongchang Company, with an epoxy equivalent of 280) and 20 parts by weight of epoxy resin E-12 (produced by Guangzhou Hongchang Company, with an epoxy equivalent of 655 and a softening point of 80 °C) mixed with 12 parts by weight of barite, 20 parts by weight of epoxy soybean oil, and 2 parts by weight of aminopropyltriethoxysilane, rolled into a uniform paste on a three-roll mill and defoamed to obtain a resin component .
[0037] Take 15 parts by weight of triethylenetetramine as the curing component. The above-mentioned resin component and curing component together constitute the adhesive S1.

Example Embodiment

[0038] Example 2
[0039] This example is used to illustrate the adhesive disclosed in the present invention and its preparation method.
[0040] The epoxy resin with epoxy equivalent of 180, epoxy resin with epoxy equivalent of 475, and amino-terminated polyetheramine are mixed uniformly in a weight ratio of 80:20:50, and then rapidly stirred at 150°C for 2h to obtain amino-terminated Polyetheramine modified epoxy resin prepolymer.
[0041] Combine 60 parts by weight of epoxy resin E-54 (produced by Guangzhou Hongchang Company, with an epoxy equivalent of 180) and 40 parts by weight of epoxy resin E-12 (produced by Guangzhou Hongchang Company, with an epoxy equivalent of 655 and a softening point of 80 ℃) with 15 parts by weight of calcium carbonate, 18 parts by weight of amino-terminated polyetheramine modified epoxy resin prepolymer, 8 parts by weight of polyurethane (isocyanate equivalent of 2000), 10 parts by weight of carboxyl-terminated nitrile rubber (acrylonitrile content 10wt%), 2 parts by weight of γ-glycidoxypropyltrimethoxysilane are mixed, rolled into a uniform paste on a three-roll mill and defoamed to obtain a resin component.
[0042] Take 50 parts by weight of amino-terminated polyetheramine as the curing component. The above-mentioned resin component and curing component together form the adhesive S2.
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PUM

PropertyMeasurementUnit
Softening point80.0°C
Softening point65.0°C
Epoxy value0.45
tensileMPa
Particle sizePa
strength10

Description & Claims & Application Information

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