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Structural adhesive with excellent low-temperature impact peel strength and preparation method thereof

A technology of peel strength and low temperature impact, applied in the field of structural adhesives, can solve the problems of inability to meet the performance requirements of automobiles, poor impact resistance, poor impact resistance of body structural adhesives, etc., to achieve good high and low temperature shear strength, excellent low temperature Impact resistance, the effect of meeting performance requirements

Active Publication Date: 2020-05-12
HUBEI HUITIAN NEW MATERIALS STOCK CO LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, the impact resistance of conventional body structure adhesives is poor, especially at low temperatures of -40°C, which cannot meet the performance requirements of automobiles in low temperature and cold weather in winter

Method used

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  • Structural adhesive with excellent low-temperature impact peel strength and preparation method thereof
  • Structural adhesive with excellent low-temperature impact peel strength and preparation method thereof
  • Structural adhesive with excellent low-temperature impact peel strength and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] This embodiment provides a structural adhesive prepared from the raw materials shown in Table 1 below:

[0041] Table 1 Structural adhesive composition table of Example 1

[0042]

[0043]

[0044] The preparation method of the present embodiment structural adhesive comprises the following steps:

[0045] S1, weigh each raw material according to Table 1.

[0046] S2. Stir and mix the epoxy resin and the toughening agent at 55±5°C for 4 hours until completely dissolved to obtain a liquid mixture.

[0047] S3, add the liquid mixture, dicyandiamide and accelerator into the dynamic mixer respectively, and stir for 30min-40min under the conditions of 35±5°C, 15Hz revolution, and 30Hz rotation until uniformly dispersed to obtain an intermediate mixture.

[0048] S4, then add filler and physical blowing agent to the intermediate mixture, continue to stir for 5min-10min at 35±5℃, revolution 15Hz, rotation 10Hz until the dispersion is uniform, vacuum defoaming, the proce...

Embodiment 2

[0050] This embodiment provides a structural adhesive prepared from the raw materials shown in Table 2 below:

[0051] Table 2 Structural adhesive composition table of Example 2

[0052]

[0053]

[0054] The preparation method of the structural adhesive of this example is the same as that of Example 1.

Embodiment 3

[0056] This embodiment provides a structural adhesive prepared from the raw materials shown in Table 3 below:

[0057] Table 3 The structural adhesive composition table of Example 3

[0058]

[0059]

[0060] The preparation method of the structural adhesive of this example is the same as that of Example 1.

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Abstract

The invention relates to a structural adhesive with excellent low-temperature impact peel strength and a preparation method thereof. The structural adhesive is prepared from specific weight percentages of epoxy resin, a toughening agent, dicyandiamide, an accelerant, a filler and a physical foaming agent, can overally achieve excellent low-temperature impact resistance, has good high-and-low-temperature shear strength, and meets the use performance requirements of automobiles in low-temperature cold weather.

Description

technical field [0001] The invention relates to the field of structural adhesives, in particular to a structural adhesive with excellent low-temperature impact peel strength and a preparation method thereof. Background technique [0002] With the upgrading of national needs and industry capabilities, consumers and domestic and foreign auto companies have increasingly strong requirements for lightweight, comfortable, and low-noise vehicles. The use of body structure adhesive can meet the needs of sheet metal bonding, strengthen the body structure, replace some solder joints, strengthen the bonding toughness of the body structure, meet the collision requirements, reduce the weight of the body, and reduce the overall cost, especially for steel-aluminum mixed structures. Bonding and all-aluminum structure bonding have become a hot spot in the application of major automobile OEMs. [0003] However, the impact resistance of conventional body structure adhesives is poor, especiall...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J163/00C09J11/08C09J11/04C09J11/06
CPCC09J163/00C09J11/08C09J11/04C09J11/06C08L2205/035C08L2205/025C08L2205/03C08L2203/14C08K2003/2206C08K2003/265C08K2201/011C08K2003/2248C08K2003/2227C08L63/00C08L55/02C08L83/04C08K13/04C08K7/04C08K3/26C08K3/22C08L51/04C08L75/04C08K7/06C08K7/08C08K7/20
Inventor 李伟红胡胜鹰彭惠娴李东阳韩胜利赵勇刚章锋
Owner HUBEI HUITIAN NEW MATERIALS STOCK CO LTD
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