Foaming type structural adhesive and preparation method thereof

A foaming, structural adhesive technology, applied in the direction of adhesives, epoxy resin adhesives, adhesive types, etc., can solve the problems of easy slippage or falling off, unable to achieve effective bonding, etc., and achieve good foaming ratio, The effect of reducing labor cost and high mechanical bonding performance

Inactive Publication Date: 2021-03-16
上海汉司实业有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Conventional structural adhesives are suitable for bonding sheet metal gaps ≤ 2mm. If larger gaps are bonded, it is easy to slip or fall off during the transportation, pretreatment and electrophoresis process of the body-in-white, so that effective bonding cannot be achieved

Method used

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  • Foaming type structural adhesive and preparation method thereof
  • Foaming type structural adhesive and preparation method thereof
  • Foaming type structural adhesive and preparation method thereof

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Embodiment Construction

[0020] The technical solutions of the present invention will be clearly and completely described below through specific embodiments.

[0021] The following materials were used in the examples.

[0022]

[0023]

[0024] The rest of the reagents are routinely commercially available.

[0025] A preparation method of foamed structural adhesive, comprising the following steps:

[0026] (1) Take raw materials according to the weight percentage of each component in Table 1:

[0027] (2) Add epoxy resin and phenoxy resin into a vacuum planetary mixer and stir at 60°C-70°C until completely dissolved to obtain a liquid mixture.

[0028] (3) Add the above liquid mixture and toughening resin into a vacuum planetary mixer, and mix uniformly at 50°C-70°C; then add fillers therein, and mix uniformly at 40°C-50°C.

[0029] (4) Lower the temperature to 30°C-40°C and add curing agent and accelerator respectively for stirring. After stirring evenly, add foaming agent and foaming accele...

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Abstract

The invention discloses a foaming type structural adhesive and a preparation method thereof. The foaming type structural adhesive comprises the following raw materials in percentage by weight: 20-50%of epoxy resin, 10-35% of a toughening agent, 2-15% of thermoplastic resin, 10-25% of filler, 1-15% of a foaming agent, 1-10% of a foaming accelerator, 1-10% of a curing agent and 0.5-5% of an accelerator. Wherein the epoxy resin comprises at least one of bisphenol A glycidyl ether, bisphenol F glycidyl ether and bisphenol A / F diglycidyl ether; wherein the toughening agent is selected from at least one of a core-shell polymer dispersed in epoxy resin, a carboxyl-terminated butadiene rubber epoxy adduct, polyurethane-modified epoxy resin, polyether amine-modified epoxy resin and an adduct of dimer fatty acid and epoxy resin; wherein the thermoplastic resin is selected from at least one of solid rubber, phenoxy resin, thermoplastic polyether and thermoplastic polyurethane. After the foamed structural adhesive is cured, good bonding strength is provided for a bonding layer, and a connecting gap between metal plates can be effectively compensated.

Description

technical field [0001] The invention relates to an adhesive material, in particular to a foamed structural adhesive and a preparation method thereof. Background technique [0002] With the continuous improvement of the requirements for the lightweight of automobiles, more and more thermosetting epoxy structural adhesives have been used in body connection technology to replace traditional connection technologies such as riveting and welding. The use of structural adhesives on the body-in-white can more effectively improve the rigidity and durability of the body, meet the collision requirements, and improve the noise and vibration of the vehicle during driving. [0003] Conventional structural adhesives are suitable for bonding sheet metal gaps ≤ 2mm. If larger gaps are bonded, it is easy to slip or fall off during the transportation, pretreatment and electrophoresis process of the body-in-white, so that effective bonding cannot be achieved. Contents of the invention [000...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J163/02C09J163/00C09J171/12C09J11/04C09J11/06C09J11/08
CPCC08K2003/2206C08K2003/2296C08K2003/265C08L2205/025C08L2205/035C08L2207/53C09J11/04C09J11/06C09J11/08C09J163/00C08L63/00C08L71/12C08K13/02C08K3/26C08K3/22C08K3/34C08K5/098
Inventor 尤佳林孝蔚吴海平向劲松
Owner 上海汉司实业有限公司
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