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Two-component epoxy structural adhesive and method for preparing same

A technology of structural adhesives and epoxy structural adhesives, applied in the direction of epoxy resin adhesives, adhesives, adhesive additives, etc., can solve the problems of performance or curing degradation, low elongation at break, etc., and achieve waterproof and chemical resistance The effects of strong corrosion resistance, good adhesion, and good low-temperature applicability

Active Publication Date: 2019-03-08
法施达(大连)实业集团有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Generally speaking, the higher the tensile elastic modulus, the lower the corresponding elongation at break, that is, the tensile elastic modulus and elongation at break are mutually restricted, and the general epoxy resin adhesive will When used in water or water, its performance or curing conditions are reduced

Method used

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  • Two-component epoxy structural adhesive and method for preparing same
  • Two-component epoxy structural adhesive and method for preparing same
  • Two-component epoxy structural adhesive and method for preparing same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] The preparation of embodiment 1 two-component epoxy structural adhesive 1

[0047] Component A: bisphenol A epoxy resin 2 48 parts, bisphenol A epoxy resin 3 12 parts, bisphenol F epoxy resin 1 15 parts, bisphenol F epoxy resin 2 18 parts, AGE 6 parts, CGE 4 parts 0.5 parts of A-187, 3.5 parts of CTBN with a mass fraction of bound acrylonitrile of 20-30% and a hydroxyl value of 0.80-1.00 nmol / g, and 10 parts of calcium carbonate.

[0048] Component B: 37 parts of Aradur 140, 23 parts of aminoethylpiperazine, 10 parts of Jeffamine T403, 24 parts of JeffamineD230, 14 parts of modified amine, 0.5 part of Momentive A-1120, and 0.5 part of triethanolamine.

[0049] Preparation method: Preheat the dual planetary power mixing equipment to 60°C, add bisphenol A epoxy resin and bisphenol F epoxy resin respectively, stir well, and turn on the vacuum, add CTBN and calcium carbonate, stir, vacuumize, and finally add AGE , BGE and A-187 were stirred evenly to prepare A component; A...

Embodiment 2

[0052] Embodiment 2 Preparation of two-component epoxy structural adhesive 2

[0053] The A component of the two-component epoxy structural adhesive 2 is exactly the same as in Example 1, and the B component is only different in the composition of the modified amine. The preparation process of the modified amine is: add 10 parts of DETA to a three-necked flask , 37 parts of MXDA and 10 parts of benzyl alcohol, stirred, vacuumed, heated to raise the temperature to 35°C and kept the temperature constant, feed nitrogen into the reaction system, add 35 parts of benzoxazine in three times, fully Stir, and when the reaction temperature gradually decreases, it indicates that the reaction is complete. Add 2 parts of DMP-30 to stop the reaction to obtain a modified amine.

[0054] The preparation method of structural adhesive 2 is the same as that of Example 1. The basic properties of the adhesive are as follows: component A is a white colloid with a viscosity of 700000mPa.s / 25℃ and 9...

Embodiment 3

[0055] Embodiment 3 Preparation of two-component epoxy structural adhesive 3

[0056] The A component of the two-component epoxy structural adhesive 3 is exactly the same as in Example 1, and the B component is only different in the composition of the modified amine. The preparation process of the modified amine is: add 30 parts of MXDA to a three-necked flask , Stir after 5 parts of TEPA, vacuumize, heat to raise the temperature to 35°C and keep the temperature constant, feed nitrogen into the reaction system, add 35 parts of benzoxazine in three times, fully stir after each addition, and wait until the reaction temperature When it gradually decreases, it indicates that the reaction is complete. Add 5 parts of DMP-30 to stop the reaction to obtain a modified amine.

[0057] The preparation method of structural adhesive 3 is the same as that in Example 1. The basic properties of the adhesive are as follows: component A is a white colloid with a viscosity of 700000mPa.s / 25℃ an...

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Abstract

The invention discloses two-component epoxy structural adhesive. The two-component epoxy structural adhesive comprises a component A and a component B. The component A comprises, by weight, 42-63 parts of bisphenol A epoxy resin, 24-45 parts of bisphenol F epoxy resin, 8-15 parts of diluents, 0.3-1.5 parts of silane coupling agents A, 1-10 parts of rubber and 5-20 parts of fillers; the component Bcomprises 32-56 parts of polyamide, 43-64 parts of aliphatic amine, 8-16 parts of modified amine, 0.3-1.5 parts of silane coupling agents B and 0.5-8 parts of accelerators. The two-component epoxy structural adhesive has the advantages that the two-component epoxy structural adhesive is high in mechanical strength, is excellent in bonding power for most materials and is good in aging resistance and excellent in low-temperature applicability, and construction can be carried out in environments at the temperatures lower than zero Celsius degrees.

Description

technical field [0001] The invention belongs to the field of adhesives, in particular to a two-component epoxy structural adhesive and a preparation method thereof. Background technique [0002] Today, adhesive technology is already a very important technology in production and manufacturing, providing solutions for various complex bonding tasks and gradually replacing traditional bonding techniques, such as brazing and welding or using screws and rivets, Improve energy utilization and reduce waste of raw materials. Among them, two-component adhesive technology plays a pivotal role in many cases, providing economic feasibility for the implementation of various innovative solutions, especially some for the purpose of lightweight structure or design principles. Products made of materials. After the materials are mixed, there is no need for high pressure and high temperature, and the curing reaction at pure room temperature reflects the great advantage of two-component adhesi...

Claims

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Application Information

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IPC IPC(8): C09J163/00C09J11/04C08G59/60C08G59/56
CPCC08G59/56C08G59/60C08K2003/265C08L2201/08C08L2205/025C08L2205/035C09J11/04C09J163/00C08L63/00C08K3/26
Inventor 刘平原
Owner 法施达(大连)实业集团有限公司