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Mesh subaqueous patching material of interpenetrating polymer of epoxy/polyurethane, preparing process and application

A technology of interpenetrating polymer and repair material, applied in the field of underwater repair material, which can solve the problems of single use and poor mechanical properties of materials

Inactive Publication Date: 2005-10-26
CHANGJIANG RIVER SCI RES INST CHANGJIANG WATER RESOURCES COMMISSION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, in terms of underwater repair materials, underwater non-dispersible agents are generally used to prepare underwater non-dispersible concrete suitable for underwater thin-layer repairs; new materials include caulking GBW water-swellable water-stop strips, etc. Research on these materials Promote the repair of concrete dams and channels, but the use of the above materials is relatively single, such as only as an adhesive, etc., and the mechanical properties of the materials are poor. In addition, due to the various types of underwater defects, so Existing above-mentioned underwater patching materials are far from being able to meet the needs of the work

Method used

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  • Mesh subaqueous patching material of interpenetrating polymer of epoxy/polyurethane, preparing process and application
  • Mesh subaqueous patching material of interpenetrating polymer of epoxy/polyurethane, preparing process and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] Epoxy / polyurethane interpenetrating polymer network underwater repair material, which consists of the following components (amounts are parts by weight): acrylic epoxy resin 100, polyurethane prepolymer (NCO / OH is 2.5) 25, styrene (diluted agent) 50, benzoyl peroxide (initiator) 0.5-1.0, N,N-dimethylaniline (accelerator) 0.1-0.2.

[0044] The preparation method of above-mentioned epoxy / polyurethane interpenetrating polymer network underwater repairing material, it comprises the steps:

[0045] The synthesis of polyurethane prepolymer, the synthesis of acrylic epoxy resin; the synthetic method of described polyurethane prepolymer is: the castor oil of 90-100 weight part, the dibutyl phthalate of 15-25 weight part are poured into In the reaction body, stir evenly, then add 35-95 parts by weight of toluene diisocyanate, add it while stirring, let it rise to 60°C naturally, then cool down to 20-30°C, then heat slowly, and keep stirring to control the reaction When the temp...

Embodiment 2

[0049] Epoxy / polyurethane interpenetrating polymer network underwater repair material, which consists of the following components (amounts are parts by weight): acrylic epoxy resin 100, polyurethane prepolymer (NCO / OH is 2.5) 25, methacrylic methyl Ester (diluent) 50, benzoyl peroxide (initiator) 0.5-1.0, N,N-dimethylaniline (accelerator) 0.05-0.10, trihexanolamine 0.1 parts by weight.

[0050] The preparation method is the same as in Example 1.

[0051] Reality

[0052] Below is the experiment of investigating the epoxy / polyurethane interpenetrating polymer network underwater repair material of the present invention: the experiment will be 15 * 15 * 15cm 3 The concrete test block is split and put together again, and a grouting nozzle and an exhaust nozzle are pasted at both ends along the diagonal line, and the seam is sealed with epoxy glue, and the sealed concrete test block is filled with water and put into the water for grouting , After the grout pushes the wa...

Embodiment 3

[0054] Epoxy / polyurethane interpenetrating polymer network underwater repair material, which consists of the following components (amounts are parts by weight): acrylic epoxy resin 100, polyurethane prepolymer (NCO / OH is 2.5) 25, styrene (diluted agent) 40, benzoyl peroxide (initiator) 0.5-1.0, N,N-dimethylaniline (accelerator) 0.1-0.2, cement 200, sand 200.

[0055] The preparation method is: after preparing according to Example 1, add 200 parts by weight of cement and 200 parts by weight of sand and mix evenly, and pass the sand through a 0.63mm sieve. It should be noted that the ratio of cement and sand can be appropriately increased or decreased in practical applications. Under the circumstances, the use of the underwater repair material of the present invention is not greatly affected.

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Abstract

The present invention relates to an epoxy / polyurethane interpenetrating polymer network underwtaer repairing material. Its composition includes (by weight portions) acrylic epoxy resin 90-110 portions, polyurethane prepolymer 15-30 portions, diluting agent 30-60 prtions, initiator 0.5-1.0 portions of accelerator 0.1-0.2 portions. Besides, said invention also provides its excellent properties and extensive application range.

Description

technical field [0001] The invention relates to an underwater repair material, more specifically an epoxy / polyurethane interpenetrating polymer network underwater repair material; the invention also relates to the preparation method and application of the underwater repair material. Background technique [0002] Concrete defects are one of the most common and common diseases of hydraulic concrete buildings, especially the underwater part of concrete. Due to the long-term underwater and harsh working environment, once underwater concrete defects occur, dams and channels will leak , posing a direct hazard to the safe operation of the dam, resulting in a large amount of water loss from the channel. But due to operational requirements, many defective dams and channels do not allow water to be vented for repair, requiring underwater construction. For large-scale anti-seepage treatment under deep water conditions, materials and processes are a big problem. Therefore, the study o...

Claims

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Application Information

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IPC IPC(8): C08G81/00
Inventor 魏涛苏杰李珍汪在芹张杰蔡胜华李晓鄂蒋硕忠胡志坤王燕黄良锐
Owner CHANGJIANG RIVER SCI RES INST CHANGJIANG WATER RESOURCES COMMISSION
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