Double-component epoxy structural adhesive

A technology of epoxy structural adhesives and adhesives, which is applied in the direction of epoxy resin adhesives, adhesives, and adhesive additives. Convenient transportation and long storage period

Inactive Publication Date: 2021-02-12
三友(天津)高分子技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Commonly used epoxy resin structural adhesives are one-component epoxy structural adhesives, and one-component epoxy structural adhesives generally use latent curing agents, which are cured by heating. When it rises, the curing agent is activated, the material is gradually cured, and the material cannot be used normally when it expires, or strict storage conditions are adopted to ensure the temperature and humidity of the one-component epoxy structural adhesive. Therefore, the one-component epoxy structural adhesive is sticky There is a problem that the agent is not easy to preserve, which limits its application conditions and scope of use.

Method used

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  • Double-component epoxy structural adhesive

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preparation example Construction

[0028] A preparation method of a two-component epoxy structural adhesive, comprising the following steps:

[0029] Step 1: Preparation of component A

[0030] (1) Weigh the epoxy resin and toughener according to the formula, heat at 50-70°C for 20-30 minutes, and mix well;

[0031] (2) Add fillers and plasticizers according to the formula amount, and after stirring, defoam on a vacuum high-speed stirring degassing machine at a speed of 2000-3000r / min for 180-300 seconds to a uniform mixture, and then obtain component A;

[0032] Step 2: Preparation of component B

[0033] (1) Weigh the curing agent, filler, plasticizer and auxiliary agent according to the formula amount, and after stirring, defoam on a vacuum high-speed stirring defoaming machine at a speed of 2000-3000r / min for 180-300 seconds to a uniform mixture, and then obtain group B share;

[0034] Mix the prepared components A and B according to the mass ratio of 3:1 to obtain a two-component structural adhesive.

Embodiment 1

[0036] (1) Put 40% epoxy resin E51 and 35% nano-core-shell modified resin in an oven at 50-70°C and heat for 20-30 minutes, stirring twice during the process to make the materials evenly mixed;

[0037] (2) Add 5% dodecyl glycidyl ether, 2% fumed white carbon black, and 18% nano-calcium carbonate to the above-mentioned mixed material, and mix them evenly, and put them on a vacuum high-speed stirring defoaming machine Degas at a speed of 2000r / min for 300 seconds to a homogeneous mixture to obtain component A;

[0038] (3) Weighing 3% dicyandiamide curing agent, 15% aliphatic amine curing agent, 10% alicyclic amine curing agent, 15% didecyl phthalate, 2% dicyandiamide curing agent, 2% dicyandiamide curing agent Dialkyl glycidyl ether, 2% coupling agent, 2% anti-aging agent, 6% antioxidant, 40% nano-calcium carbonate and 5% fumed silica, after mixing evenly, stir in vacuum at high speed Degassing at a speed of 2000r / min for 300 seconds on a degassing machine until a homogeneous...

Embodiment 2

[0041] (1) Put 40% epoxy resin E51, 30% nano-core-shell modified resin, and 5% carboxyl-terminated liquid butyronitrile in an oven at 50-70°C for 20-30 minutes by mass, during which time Stir twice to mix the ingredients evenly;

[0042] (2) Add 5% dioctyl phthalate, 5% didecyl phthalate, 4% fumed silica, and 11% light calcium carbonate to the above mixed material. , after mixing evenly, defoam at a speed of 2000r / min for 300 seconds on a vacuum high-speed stirring degassing machine to obtain a uniform mixture, that is, to obtain component A;

[0043] (3) Weigh 3% dicyandiamide curing agent, 20% aliphatic amine curing agent, 8% alicyclic amine curing agent, 10% didecyl phthalate, 5% dicyandiamide curing agent, 5% dicyandiamide curing agent Dialkyl glycidyl ether, 2% coupling agent, 2% anti-aging agent, 6% antioxidant, 40% nano-calcium carbonate and 4% fumed silica, after mixing evenly, stir in vacuum at high speed Degassing at a speed of 2000r / min for 300 seconds on a degass...

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Abstract

The invention discloses a double-component epoxy structural adhesive which comprises the following raw material components in percentage by mass: a component A, the component A comprising the following components in percentage by mass: 40-60% of epoxy resin, 5-10% of a plasticizer, 20-40% of a flexibilizer and 10-20% of a filler; a component B, prepared from the following components in percentageby mass: 20-35 percent of an epoxy curing agent, 1020 percent of an auxiliary agent, 1025 percent of a plasticizer and 3545 percent of filler; wherein the mass ratio of the component A to the component B is 3: 1. The double-component epoxy structural adhesive is low in curing temperature, simple to operate and long in storage life, and can meet the bonding requirements of conventional mechanical structural parts such as airplanes and automobiles.

Description

technical field [0001] The invention relates to the technical field of epoxy resin adhesives, in particular to a two-component epoxy structural adhesive, which can be widely used in the bonding of mechanical structural parts in the fields of aircraft, automobiles and the like. Background technique [0002] The technological progress of the modern automobile and aircraft industries requires lightweight structures, energy saving and environmental protection, and aesthetic comfort. It is necessary to replace traditional steel with new materials such as aluminum alloy, glass fiber reinforced plastics, honeycomb sandwich structures, plastics, and rubber. Connecting instead of welding significantly increases the amount of adhesive used. Epoxy resin structural adhesive is a kind of adhesive used for stressed components, which can transmit load, bear large stress and have high strength. Structural adhesives are mainly used for bonding structural parts of automobiles, replacing or p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J163/00C09J11/08C09J11/04C09J11/06
CPCC08K2003/265C08K2201/011C08L2205/025C08L2205/03C08L2205/035C09J11/04C09J11/06C09J11/08C09J163/00C08L101/00C08K13/04C08K5/1515C08K7/26C08K3/26C08K5/12C08L13/00C08L63/00
Inventor 陈雨高之香李建武张永胜陈力李世春万福荣吴子刚
Owner 三友(天津)高分子技术有限公司
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