High-permeability polyurethane graft-modified epoxy resin interpenetrating-network polymer grouting material and preparation method thereof

A technology of epoxy resin and graft modification, which is applied in the direction of educts, products, reagents, etc., can solve the problems of limited modification effect, poor environmental protection, and difficult to meet the tensile strength, so as to improve the moisture curing rate, The effect of solving curing difficulties and reducing adverse effects

Inactive Publication Date: 2013-02-13
HUNAN UNIV OF TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The epoxy resin grouting material improves the toughness of the grouting material to a certain extent. Since the toughening is achieved through the change of the curing agent, the modification effect is limited, and the toughness of the prepared epoxy resin grouting material is difficult to meet the tensile strength requirements. Engineering construction requirements with slightly higher strength
[0004] Although the above-mentioned invention patents overcome some shortcomings of epoxy resin grouting materials (such as low wet bonding strength, poor toughness, high viscosity, poor environmental protection, etc.), there is still no better solution for underground concrete construction projects in these technologies. For example, some grouting materials are environmentally friendly but have poor mechanical properties; some grouting materials have good mechanical properties but poor working performance; some grouting materials have good overall performance but are relatively expensive.

Method used

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  • High-permeability polyurethane graft-modified epoxy resin interpenetrating-network polymer grouting material and preparation method thereof
  • High-permeability polyurethane graft-modified epoxy resin interpenetrating-network polymer grouting material and preparation method thereof
  • High-permeability polyurethane graft-modified epoxy resin interpenetrating-network polymer grouting material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] Raw material pretreatment: put epoxy resin and polyethylene glycol in a vacuum drying oven, dry in vacuum at 110-120° C. for 4 hours, and cool to room temperature for later use.

[0049] Synthesis of isocyanate-terminated polyurethane prepolymer (PU-prepolymer): Add 100 g PEG1000 into a four-necked flask equipped with a stirrer, thermometer, Y-shaped dropping funnel, and reflux condenser, and heat up to 50 °C under slow stirring. ℃, under the protection of nitrogen, add 34.8 g TDI dropwise (dropping within 30 minutes), raise the temperature to 60℃, and react for 1-3 hours to obtain the isocyanate-terminated PU-prepolymer.

[0050] (1) Preparation of component A:

[0051] Mix the isocyanate-terminated polyurethane prepolymer and epoxy resin in a mass ratio of 5:95, heat up to 70°C under stirring, react under nitrogen protection, and sample -NCO groups every hour until all of them disappear, stop reaction to obtain the intermediate; mix 100 parts of the above intermediat...

Embodiment 2

[0056] The synthesis of the isocyanate-terminated (-NCO) polyurethane (PU) prepolymer is the same as step (1) of Example 1.

[0057] The preparation of the isocyanate-based polyurethane prepolymer is compared with Example 1, except that the mass ratio between the isocyanate-based polyurethane prepolymer and the epoxy resin is changed to 10:90, and the others are the same.

[0058] The preparation of the intermediate (grafted PU / EP IPNs) is the same as in Example 1;

[0059] Component A: 100 parts of synthetic grafted PU / EP IPNs, 20 parts of diluent I (composed of 10 parts of butyl glycidyl ether, 5 parts of ethylene glycol diglycidyl ether and 5 parts of 1,6-hexanediol diol Glycidyl ether is uniformly mixed), 1 part of simethicone antifoaming agent is mixed, stirred evenly, and component A is obtained.

[0060] Component B: 45 parts of curing agent (composed of 25 parts of diethylenetriamine, 15 parts of triethylenetetramine and 5 parts of isophoronediamine), 20 parts of dilu...

Embodiment 3

[0063] The synthesis of the isocyanate-terminated (-NCO) polyurethane (PU) prepolymer is the same as step (1) of Example 1.

[0064] The preparation of the isocyanate-based polyurethane prepolymer is compared with Example 1, except that the mass ratio between the isocyanate-based polyurethane prepolymer and the epoxy resin is changed to 15:85, and the others are the same.

[0065] The preparation of the intermediate (grafted PU / EP IPNs) is the same as in Example 1;

[0066] Component A: 100 parts of synthetic grafted PU / EP IPNs, 20 parts of diluent I (composed of 5 parts of butyl glycidyl ether, 5 parts of ethylene glycol diglycidyl ether, 5 parts of 1,6-hexanediol diol Glycidyl ether and 5 parts of phenyl glycidyl ether are uniformly mixed), and 1 part of simethicone antifoaming agent is mixed and stirred evenly to obtain component A.

[0067] Component B: 45 parts of curing agent (composed of 20 parts of diethylenetriamine, 20 parts of triethylenetetramine and 5 parts of is...

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Abstract

The invention belongs to the field of construction materials, and particularly relates to a high-permeability polyurethane graft-modified epoxy resin interpenetrating-network polymer grouting material which is composed of a component A and a component B, wherein the component A is composed of 5-30 parts of isocyanate-terminated polyurethane prepolymer, 95-70 parts of epoxy resin and 10-30 parts of diluter I, and the polyurethane and epoxy resin form a grafted interpenetrating network structure; the component B is composed of 40-60 parts of curing agent, 10-30 parts of diluter II, 0.5-2 parts of accelerator and 0.5-2 parts of defoaming agent; and when in use, the components A and B can be evenly mixed to obtain the grouting material. The interpenetrating network grouting material provided by the invention integrates the advantages of the polyurethane and epoxy resin, has the characteristics of high adhesive strength, moderate toughness, high stability, low viscosity, favorable groutability and excellent cost performance, and can be widely used in seepage prevention, leakage stoppage, reinforcement and strengthening of construction, maintenance and other projects of tunnels, hydropower, rock soil slopes, foundation treatment, ground settlement, railways and highways.

Description

technical field [0001] The invention belongs to the technical field of building materials, and specifically relates to a kind of anti-seepage, plugging, reinforcement and reinforcement for treating tunnels, hydropower, rock and soil slopes, foundation treatment, construction of railways and highways, and cracks in concrete buildings. A high-permeability grafted polyurethane / epoxy resin interpenetrating network polymer grouting material and a preparation method thereof. technical background [0002] Epoxy resin has the characteristics of high bonding strength, can be cured at room temperature, small shrinkage rate of cured products, excellent mechanical properties and good corrosion resistance, etc. It is widely used as adhesives, coatings, grouting materials, etc. in electronics, machinery, and civil engineering and many other fields. Epoxy resin grouting material has become the leading chemical grouting material in foundation reinforcement and structural repair projects be...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G59/32C08G59/38C08G18/66C08G18/48C08G18/30
CPCY02P20/141
Inventor 陈宪宏侯清麟黄金明余江鸿
Owner HUNAN UNIV OF TECH
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