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Epoxy adhesive with high strength and high elasticity

An epoxy adhesive, high elasticity technology, applied in the direction of adhesive type, adhesive, epoxy resin glue, etc., can solve the problems that cannot meet the use requirements, and achieve good adhesion and good thixotropy

Inactive Publication Date: 2011-06-08
柴中南
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, this type of adhesive can not meet the requirements for use

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0066] 10 grams of 2-heptadecyl imidazole, 12 grams of dicyandiamide and 190 grams of epoxy-terminated polysulfide rubber were placed in an oil bath at 100° C. for 1 hour to obtain a pre-reaction product. After cooling, add 100 grams of epoxy resin, 20 grams of polyether polyol, 60 grams of nano-calcium carbonate, 100 grams of titanium dioxide, 1 gram of carbon black, 0.5 grams of defoamer BYK-555, 0.5 grams of KH550, and fumed silica 2 grams, stir well and place it on a three-roll machine and roll it twice. Then put it in a pressure vessel, vacuumize and defoam under stirring, and then it becomes an adhesive. The viscosity of the adhesive is 300 Pa.s. The adhesive can be fully cured at 130°C for 1 hour. Thixotropy is less than 5mm. The shear strength (normal temperature) is 7.5 MPa, and it is 6.0 MPa after 120 hours in warm water at 40°C. T-peel strength (room temperature) 500N / 20mm, 350N / 20mm after 120 hours in warm water at 40°C. Adhesive strength with glass plate (roo...

Embodiment 2

[0069] 15 grams of 2-ethyl-4-methylimidazole, 15 grams of dicyandiamide and 200 grams of epoxy-terminated polysulfide rubber were placed in an oil bath at 100° C. for 1 hour to obtain a pre-reaction product. After cooling, add 100 grams of epoxy resin, 20 grams of polyether polyol, 50 grams of nano-calcium carbonate, 100 grams of titanium dioxide, 1 gram of carbon black, 0.5 gram of defoamer BYK-051, 0.5 gram of 560 series 2 grams of coupling agent and fumed silica, after being stirred evenly, are placed on a three-roll machine and rolled twice. Then put it in a pressure vessel, vacuumize and defoam under stirring, and then it becomes an adhesive.

[0070] The viscosity of the adhesive is 330 Pa.s. The adhesive can be fully cured at 130°C for 1 hour. Thixotropy is less than 5mm. The shear strength (normal temperature) is 7.6 MPa, and it is 6.3 MPa after 120 hours in warm water at 40°C. T-peel strength (room temperature) 550N / 20mm, 360N / 20mm after 120 hours in warm water at...

Embodiment 3

[0073] 16 grams of 2-heptadecyl imidazole, 18 grams of dicyandiamide and 210 grams of epoxy-terminated polysulfide rubber were placed in an oil bath at 100° C. for 1 hour to obtain a pre-reaction product. The number average molecular weight of described polysulfide rubber is 1000, and epoxy equivalent is 600. After cooling, add 100 grams of bisphenol A epoxy resin, 30 grams of polyether polyols, 30 grams of nanometer calcium carbonate, 3 grams of carbon black, 0.9 grams Defoamer BYK-555, 0.9 grams of KH550, 3 grams of fumed silica. After stirring well, put it on a three-roll machine and roll it twice. Then put it in a pressure vessel, vacuumize and defoam under stirring, and then it becomes an adhesive.

[0074] The viscosity of the adhesive is 320 Pa.s. The adhesive can be fully cured at 130°C for 1 hour. Thixotropy is less than 6mm. The shear strength (normal temperature) is 8.5 MPa, and it is 7.0 MPa after 120 hours in warm water at 40°C. T-peel strength (room temperat...

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Abstract

The purpose of the invention is to provide an epoxy adhesive with high toughness, good elasticity, and good cementability. The high strength and high elasticity epoxy adhesive is suitable for steel-to-steel bonding and steel-to-metal bonding. The adhesive in the invention employs an epoxy resin with more than two epoxy groups in one molecule, and available epoxy resins include bisphenol A epoxy resin, bisphenol F epoxy resin, novolac epoxy, glycidyl ester type epoxy resin, glycidol amine type epoxy resin etc.

Description

technical field [0001] The present invention relates to adhesives, in particular, the present invention relates to a high-strength and high-elasticity epoxy adhesive. The high-strength and high-elasticity epoxy adhesive is suitable for steel-steel bonding and steel-metal bonding. Background technique [0002] The adhesive based on epoxy resin can bond a variety of metal and non-metal materials. It has good processing performance, excellent mechanical properties, electrical properties and chemical resistance. However, after the unmodified epoxy resin is cured, its use is limited due to its high brittleness (about 4% elongation at break). [0003] There are many ways to modify epoxy resin, but the main method is to add elastomers and thermoplastics for modification and toughening. However, in the past elastomer modification methods, the phase separation of the elastomer and the epoxy resin occurs during the curing process of the adhesive, and the elastomer forms a dispersed ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J163/00C09J9/00
Inventor 柴中南
Owner 柴中南
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