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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
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI 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 discloses an adhesive. After the adhesive is applied to the surface of steel plates, the steel plates have a very high bonding strength

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0028] The invention also discloses a preparation method of the above-mentioned adhesive, which includes: mixing main resin, toughening agent and filler, grinding and degassing to obtain a resin component; using a normal temperature curing agent as a curing component to obtain an adhesive. The above mixing and grinding methods are well known in the art, for example, it 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, the thixotropic agent and the heat-resistant agent are contained, one or more of the coupling agent, the thixotropic agent and the heat-resistant agent can be combined with the host resin , toughening agent and filler are mixed together, ground and defoamed to obtain the resin component. Similarly, when high-temperature curing agent and curing accelerator need to be used, it also includes mixing the high-temperature curing agent and curing accelerator with the normal temperature curing a...

Embodiment 1

[0035] This example is used to illustrate the adhesive disclosed in the present invention and its preparation method.

[0036] 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 ℃) mixed with 12 parts by weight of barite, 20 parts by weight of epoxidized soybean oil, and 2 parts by weight of aminopropyl triethoxysilane, rolled into a uniform paste on a three-roll mill and degassed to obtain a resin component .

[0037] Take 15 parts by weight of triethylenetetramine as a curing component. The above-mentioned resin component and curing component together constitute the adhesive S1.

Embodiment 2

[0039] This example is used to illustrate the adhesive disclosed in the present invention and its preparation method.

[0040] Mix an epoxy resin with an epoxy equivalent of 180, an epoxy resin with an epoxy equivalent of 475, and amino-terminated polyetheramine at a weight ratio of 80:20:50, and then stir and react rapidly at 150°C for 2 hours to obtain an amino-terminated polyetheramine. Polyetheramine modified epoxy resin prepolymer.

[0041] 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 (terminal isocyanate equivalent is 2000), 10 parts by weight of carboxyl-terminated nitrile rubber (acrylonitril...

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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.

Description

technical field [0001] The invention relates to an adhesive and a preparation method and a use method thereof, in particular to a vehicle structural adhesive and a preparation method and a use method thereof. Background technique [0002] At present, the welding method is mainly used for the connection of automobile structural parts, but with the increasing requirements of automobiles for reducing weight, reducing cost and improving impact resistance, the welding method can no longer meet these requirements; the welding method will be glued or glued. It is replaced by a combination of bonding and welding. Among them, the adhesive commonly used in bonding is structural adhesive. [0003] Traditional structural adhesives are available in materials such as epoxy, rubber, acrylate and polyurethane. Among them, epoxy resin has been widely used because of its excellent mechanical properties and can well meet the requirements of the current automobile manufacturing process. [0...

Claims

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Application Information

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IPC IPC(8): C09J163/00B32B37/12
Inventor 唐富兰赖学平
Owner BYD CO LTD
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