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High strength polyurethane modified epoxy construction structure glue and manufacturing method thereof

A technology of polyurethane modification and building structural adhesive, which is applied in the direction of epoxy resin glue, polyurea/polyurethane adhesive, adhesive, etc., and can solve problems such as bad smell, poor compatibility, and unsatisfactory modification effect

Active Publication Date: 2012-08-15
HUNAN SHENLI IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The use of liquid polysulfide rubber to modify epoxy resin has the disadvantages of odor, and the use of liquid nitrile rubber to modify has the disadvantages of poor compatibility, curing needs to be heated and cured, and the modification effect is not ideal.

Method used

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  • High strength polyurethane modified epoxy construction structure glue and manufacturing method thereof
  • High strength polyurethane modified epoxy construction structure glue and manufacturing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] (1) Preparation of polyurethane prepolymer

[0034] The feed amount and free isocyanate group content in the preparation of polyurethane prepolymer are shown in Table 1.

[0035] The preparation of table 1 polyurethane prepolymer

[0036]

[0037] Preparation:

[0038] In a reactor equipped with a stirrer, dropping funnel, reflux condenser, vacuum tube, and water bath heating device, add 100g of polyether polyol, start stirring, raise the temperature to 90°C, and vacuum for 2 hours, with a vacuum degree of 0.092~ 0.095 MPa. Then the temperature was lowered to 60° C., the vacuum was eliminated, and TDI was added through the dropping funnel, and the dosage was shown in Table 1. React at 60°C for 1 hour, raise the temperature to 70°C for 1 hour, then raise the temperature to 85°C for 1 hour, lower to normal temperature, and take samples to test for free isocyanate groups.

[0039] (2) Preparation of component A of modified epoxy building structure adhesive

[0040]...

Embodiment 2

[0061] Ingredients for component A: epoxy resin E-44 80.0g D.E.R-354 20.0g

[0062] Reactive diluent 501 10.0g 678 3.0g

[0063] Polyurethane prepolymer 4.0g

[0064] Nano powder material SiO 2 3.0g

[0065] Organosilane coupling agent KH-560 1.5g

[0066] All the other are the same as embodiment 1

[0067] The preparation method and test method are the same as in Example 1, and the test results are shown in Table 2.

Embodiment 3

[0069] Ingredients for Component A:

[0070] Epoxy resin E-51 40.0g E-56 40.0g D.E.R-354 20.0g

[0071] Reactive diluent 501 5.0g 678 5.0g

[0072] Polyurethane prepolymer 3.0g

[0073] Nano powder material SiO 2 3.0g

[0074] Organosilane coupling agent KH-560 1.8g

[0075] All the other are the same as embodiment 1

[0076] The preparation method and test method are the same as in Example 1, and the test results are shown in Table 2.

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Abstract

The invention discloses a high-strength polyurethane modified epoxy building structural adhesive and a method for preparing the same. The high-strength polyurethane modified epoxy building structural adhesive consists of two compositions A and B, wherein the composition A consists of 82 to 95 weight percent of polyurethane modified epoxy resin, 5 to 15 weight percent of reactive diluent, 2 to 5 weight percent of nanometer powder material and 1 to 3 weight percent of organosilane coupling agent; and the composition B consists of 20 to 78 weight percent of modified amine curing agent, 20 to 78 weight percent of aromatic amine curing agent, 1 to 5 weight percent of accelerant and 1 to 3 weight percent of organosilane coupling agent. Compared with the common epoxy resin building structural adhesive, the high-strength polyurethane modified epoxy building structural adhesive has higher colloid strength, bonding strength and colloid elongation rate.

Description

technical field [0001] The invention relates to an adhesive used in the construction industry, in particular to a high-strength adhesive for structure reinforcement. Background technique [0002] In 1979, my country began to use and research building structural adhesives, and it has been 30 years since then. Due to the great opportunity of my country's reform and opening up, the technological progress and market demand of the construction industry have developed rapidly. So far, there are close to 300 domestic construction structural adhesive production and R&D units, and basically all kinds of construction structural adhesives can be produced. Entering the 21st century, the domestic carbon fiber material manufacturing technology is becoming more and more mature, and a large number of carbon fiber material products such as carbon fiber cloth and carbon fiber panels have begun to be used in building reinforcement construction. The national standard "Code for Design of Concr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09J163/00C09J163/02C09J175/04C09J11/04C09J11/06
Inventor 袁素珍王理尧李冬月刘辉
Owner HUNAN SHENLI IND
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