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Bi-component adhesive composition and preparation method thereof

A two-component adhesive and composition technology, used in adhesives, adhesive additives, carboxyl rubber adhesives, etc., can solve the problem of poor heat resistance and water resistance, inability to use impact resistance, low bonding strength problems, to achieve the effect of reducing water absorption, improving heat resistance, and high bonding strength

Active Publication Date: 2013-09-18
BYD CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The invention solves the problems of low bonding strength, poor heat resistance and water resistance, inability to use at high temperature and poor impact resistance in the conventional epoxy structural adhesives in the prior art, so that it cannot be used as a structure for connecting automotive structural parts. glue technical issues

Method used

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  • Bi-component adhesive composition and preparation method thereof
  • Bi-component adhesive composition and preparation method thereof
  • Bi-component adhesive composition and preparation method thereof

Examples

Experimental program
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Embodiment approach

[0028] Preferably, in the present invention, the epoxy equivalent of the third epoxy resin is 120-250 g / eq, and the content of naphthalene ring groups is 40-60 wt%. As an embodiment of the present invention, the third epoxy resin may be an epoxy resin represented by formula I or formula II, but is not limited thereto.

[0029]

[0030] In the present invention, the third epoxy resin can directly use a commercially available product, for example, it can be selected from HP-4700 of DIC Corporation of Japan.

[0031] In the present invention, the toughening agent is properly selected so that the two-component adhesive of the present invention has good toughness and impact resistance within the service temperature of the automobile without reducing heat resistance and rigidity, and at the same time It has good low-temperature flexibility and adhesion, so that the two-component adhesive of the present invention meets the use requirements at -40°C-80°C. Specifically, the first t...

Embodiment 1-3

[0052] (1) According to the raw material ratio shown in Table 1, mix the first epoxy resin, the second epoxy resin, the third epoxy resin and the first toughening agent evenly at 65°C, and then add filler and thixotropic The mixture was mixed to a powder-free state, rolled into a paste on a three-roll mill, and vacuum degassed for 30 minutes to obtain component A of the two-component adhesives S1-S3 of Examples 1-3.

[0053] (2) According to the ratio of raw materials shown in Table 1, the second toughening agent, normal temperature curing agent, high temperature curing agent and accelerator are stirred and mixed evenly at room temperature to a powder-free state, and then rolled on a three-roll mill Paste, after vacuum degassing for 30 minutes, the B components of the two-component adhesives S1-S3 of Examples 1-3 were obtained.

[0054] Table 1

[0055]

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Abstract

The invention provides a bi-component adhesive composition composed of an A component and a B component. The A component contains an epoxy resin mixture, a first toughening agent, filler and a thixotropic agent; the B component contains a second toughening agent, a normal temperature curing agent, a high-temperature curing agent and an accelerant; the epoxy resin mixture contains a first epoxy resin, a second epoxy resin and a third epoxy resin, the first epoxy resin is a bisphenol A epoxy resin or a bisphenol A epoxy resin, the second epoxy resin is a chelate modified epoxy resin, and the third epoxy resin is a naphthalene-nucleus modified epoxy resin; the first toughening agent is a core-shell structure rubber nano particle, the second toughening agent is an end-isocyanate polyurethane and / or end-carboxy nitrile rubber. The invention further provides a preparation method of the bi-component adhesive. The adhesive composition provided by the invention is high in adhesion strength, high in heat resistance, low in water adsorption, high in impact resistance, and capable of satisfying the use requirement of structural adhesive for connecting structural members of an automobile.

Description

technical field [0001] The invention belongs to the field of epoxy structural adhesives for automobiles, and specifically designs a two-component adhesive composition and a preparation 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 energy consumption and improving safety, the welding method can no longer meet the technical requirements. For example, in order to reduce the weight of the car body, some light metals such as aluminum alloy or magnesium alloy are used to replace steel in the components of the car body, but aluminum alloy and magnesium alloy are difficult to weld. In addition, the traditional welding method is difficult to improve the crash resistance of the car, resulting in the inability to effectively improve the safety of the car. Therefore, welding is gradually replaced by gluing or ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J163/02C09J163/00C09J175/04C09J113/00C09J133/12C09J109/06C09J147/00C09J183/04C09J11/04C08G59/56
Inventor 唐富兰
Owner BYD CO LTD
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