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Medium-temperature curing high-toughness epoxy adhesive and preparation method thereof

An epoxy adhesive, high toughness technology, used in adhesives, epoxy resin adhesives, polymer adhesive additives, etc., can solve the problems of epoxy resin brittleness, poor impact toughness, limitations, etc., to achieve the effect of rapid transfer

Active Publication Date: 2020-04-28
康达新材料(集团)股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the shortcomings of epoxy resin itself, such as high brittleness and poor impact toughness, limit its application in the field of automobile lightweight

Method used

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  • Medium-temperature curing high-toughness epoxy adhesive and preparation method thereof
  • Medium-temperature curing high-toughness epoxy adhesive and preparation method thereof
  • Medium-temperature curing high-toughness epoxy adhesive and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0056] 1. The preparation method of the toughening agent:

[0057] React 100 parts of N330, 80 parts of N220 and 30 parts of TDI at 80°C to prepare an isocyanate-terminated prepolymer; weigh 100 parts of isocyanate-terminated prepolymer, 12 parts of KH550 and 10 parts of KH560 and mix them in the reactor, React for 60 minutes under stirring at a speed of 200-500 rev / min, and discharge the material to obtain a silicone hybrid polyurethane elastomer.

[0058] 2. The preparation method of medium temperature curing high toughness epoxy adhesive:

[0059] 1) Preparation of component A: 50 parts of E-51 resin, 50 parts of E-44 resin, 8 parts of 636 reactive diluent, 5 parts of siloxane hybrid polyurethane elastomer, 10 parts of talc powder, silicon micropowder Put 60 parts and 6 parts of hydrophobic fumed silica into the planetary stirring tank, control the rotation speed at 200-500 rpm for stirring and mixing, and the mixing time is 2 hours. After vacuum defoaming, filter, discharge...

Embodiment 2

[0062] 1. The preparation method of the toughening agent:

[0063] React 100 parts of N330, 80 parts of N220 and 30 parts of TDI at 80°C to prepare an isocyanate-terminated prepolymer; weigh 100 parts of isocyanate-terminated prepolymer, 12 parts of KH550 and 10 parts of KH560 and mix them in the reactor, React for 60 minutes under stirring at a speed of 200-500 rev / min, and discharge the material to obtain a silicone hybrid polyurethane elastomer.

[0064] 2. The preparation method of medium temperature curing high toughness epoxy adhesive:

[0065] 1) Preparation of component A: 50 parts of E-51 resin, 50 parts of E-44 resin, 8 parts of 636 reactive diluent, 10 parts of siloxane hybrid polyurethane elastomer, 10 parts of talcum powder, and microsilica powder Put 55 parts and 6 parts of hydrophobic fumed silica into a planetary stirring tank, control the rotation speed at 200-500 rpm for stirring and mixing, and the mixing time is 2 hours. After vacuum defoaming, filter, dis...

Embodiment 3

[0068] 1. The preparation method of the toughening agent:

[0069] React 100 parts of N330, 80 parts of N220 and 30 parts of TDI at 80°C to prepare an isocyanate-terminated prepolymer; weigh 100 parts of isocyanate-terminated prepolymer, 12 parts of KH550 and 10 parts of KH560 and mix them in the reactor, React for 60 minutes under stirring at a speed of 200-500 rev / min, and discharge the material to obtain a silicone hybrid polyurethane elastomer.

[0070] 2. The preparation method of medium temperature curing high toughness epoxy adhesive:

[0071] 1) Preparation of component A: 50 parts of E-51 resin, 50 parts of E-44 resin, 8 parts of 636 reactive diluent, 20 parts of siloxane hybrid polyurethane elastomer, 10 parts of talcum powder, and microsilica powder Put 45 parts and 6 parts of hydrophobic fumed silica into a planetary stirring tank, control the rotation speed at 200-500 rpm for stirring and mixing, and the mixing time is 2 hours. After vacuum defoaming, filter, dis...

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Abstract

The invention discloses a medium-temperature curing high-toughness epoxy adhesive which comprises a component A and a component B. The mass ratio of the component A to the component B is (0.9-1.1): (1.1-0.9). The component A comprises the following components in parts by mass: 80-120 parts of epoxy resin; 6-20 parts of an active diluent; 20-40 parts of a toughening agent; 30-60 parts of a fillingmaterial; and 2-10 parts of a thixotropic agent; the component B comprises the following components in parts by mass: 10-50 parts of a low-molecular-weight polyamide curing agent; 20-60 parts of a modified amine curing agent; 1-5 parts of an accelerant; 40-80 parts of a filling material; and 1-5 parts of thixotropic agent. The invention also discloses a preparation method thereof. A winding interlocking type interpenetrating network structure formed by the medium-temperature curing high-toughness epoxy adhesive is beneficial to rapid transmission and dispersion of stress and can realize cementing of various automobile lightweight materials, including an aluminum plate, a honeycomb aluminum interlayer and a carbon fiber composite material.

Description

technical field [0001] The invention belongs to the technical field of epoxy adhesives, and in particular relates to a medium-temperature curing high-toughness epoxy adhesive and a preparation method thereof. Background technique [0002] In recent years, the automobile industry has begun to develop in the direction of new energy, lightweight, intelligence and networking. While ensuring safety, better experience and comfort are increasingly favored by consumers. Among them, lightweight is an important way to achieve energy saving and emission reduction in the automotive industry. The concept of "replacing steel with aluminum and steel with plastic" is quietly entering the automobile industry under the guidance of my country's policies and industrial transformation and development. These emerging materials can reduce weight, reduce energy consumption, and replace traditional welding and riveting with adhesive bonding. , Improving the quality effect of automobile products. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J163/00C09J11/04C09J11/08C08G77/458C08G18/48C08G18/28C08G18/83C08G59/60
CPCC09J163/00C09J11/04C09J11/08C08G77/458C08G18/4804C08G18/289C08G18/837C08G59/60C08L63/00C08L75/08C08K3/34C08K3/36
Inventor 吴杰李达
Owner 康达新材料(集团)股份有限公司
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