Foaming-free fast-curing high-strength leak-stopping waterproof polyurethane grouting material

A grouting material and polyurethane technology, applied in the field of building materials, can solve the problems of inability to achieve long-term waterproofing and reinforcement of concrete, and achieve the effects of good sealing and waterproofing effect, good toughness and high bonding strength.

Active Publication Date: 2015-10-14
RAILWAY ENG RES INST CHINA ACADEMY OF RAILWAY SCI +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] To sum up, the foamed polyurethane plugging material can only be used to plug leaking water from cracks, and cannot play the role of long-term waterproofing and concrete reinforcement

Method used

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  • Foaming-free fast-curing high-strength leak-stopping waterproof polyurethane grouting material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Component A:

[0028] Add tetrahydrofuran diol, tetrahydrofuran copolyether diol and hydroxyl-terminated polybutadiene into the reaction kettle according to the mass ratio of 0.5:3:0.2, heat to (115±5)°C while stirring, vacuum dehydrate for 3 hours, cool down and store for mixing Diol oligomers: Add the isocyanate monomer IPDI into the reaction kettle, heat to (80±5)°C, slowly add the dehydrated mixed diol oligomers dropwise, after 1.5h, mix the diols to low The uniform dropwise addition of the polymer is completed, and when the isocyanate group content of the prepolymer reaches 20%, the reaction is stopped, and the temperature of the prepolymer is lowered to below 50° C. for storage. Add 15 parts of prepolymer, 30 parts of PAPI, 25 parts of vegetable oil-based plasticizer and 30 parts of citric acid ester plasticizer into the reaction kettle, stir and defoam under vacuum for 1 hour, and discharge to obtain component A.

[0029] Component B:

[0030] Add 10 parts of t...

Embodiment 2

[0033] Component A:

[0034] Add tetrahydrofuran diol, tetrahydrofuran copolyether diol and hydroxyl-terminated polybutadiene into the reaction kettle according to the mass ratio of 1:3:0.5, heat to (115±5)°C while stirring, vacuum dehydrate for 3 hours, cool down and store for mixing Diol oligomers: Add the isocyanate monomer IPDI into the reaction kettle, heat to (80±5)°C, slowly add the dehydrated mixed diol oligomers dropwise, after 1.5h, mix the diols to low After the uniform dropwise addition of the polymer is completed, the reaction is stopped when the isocyanate group content of the prepolymer is 15%, and the temperature of the prepolymer is lowered to below 50° C. for storage. Add 5 parts of prepolymer, 60 parts of carbodiimide-modified MDI and 30 parts of fatty acid ester plasticizer into the reaction kettle, stir and defoam under vacuum for 1 hour, and discharge to obtain component A.

[0035] Component B:

[0036] Add 23 parts of tetrafunctional polypropylene oxi...

Embodiment 3

[0039] Component A:

[0040] Add tetrahydrofuran diol, tetrahydrofuran copolyether diol and hydroxyl-terminated polybutadiene into the reaction kettle according to the mass ratio of 0.75:3:0.35, heat to (115±5)°C while stirring, vacuum dehydrate for 3 hours, cool down and store for mixing Diol oligomers: Add the isocyanate monomer IPDI into the reaction kettle, heat to (80±5)°C, slowly add the dehydrated mixed diol oligomers dropwise, after 1.5h, mix the diols to low After the uniform dropwise addition of the polymer is completed, the reaction is stopped when the isocyanate group content of the prepolymer is 17.5%, and the temperature of the prepolymer is lowered to below 50° C. for storage. Add 10 parts of prepolymer, 45 parts of MDI-50, 22.5 parts of vegetable oil-based plasticizer and 20 parts of fatty acid ester plasticizer into the reaction kettle, stir and defoam under vacuum for 1 hour, and discharge to obtain component A.

[0041] Component B:

[0042] Add 16 parts o...

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Abstract

The invention provides a foaming-free fast-curing high-strength leak-stopping waterproof polyurethane grouting material. The material is composed of a component A and a component B, wherein the component A comprises isocyanate monomer, isocyanate prepolymer and highly-hydrophobic environment-friendly plasticizer, the component B comprises high-activity polyether polyol, chain-extending cross-linking agent, highly-hydrophobic environment-friendly plasticizer and antioxidant, and a volume ratio of the component A to the component B is 1: 1. The leak-stopping waterproof polyurethane grouting material has low viscosity, is convenient to grout, has the characteristics of no foaming and fast curing and the advantages of good leak-stopping effect, high mechanical strength and wet bonding strength and excellent aging resistance, and is applicable to rapid leak stopping, water prevention and reinforcement of distress in concrete of an underground construction.

Description

technical field [0001] The invention belongs to the field of building materials, in particular to a non-foaming fast-curing high-strength polyurethane plugging and waterproof grouting material. Background technique [0002] At present, the problem of tunnel leakage is relatively serious. As of the end of 1998, there were more than 5,000 railway tunnels in operation in my country, with a total length of 2,500 km, of which about 70% were water-damaged tunnels, and 1,362 were seriously water-damaged, accounting for about 30% of the operating tunnels. Underground projects such as subways, underground civil air defense, and underground garages are also facing problems such as leakage. Leakage in the tunnel will increase the air humidity in the tunnel, and easily cause damage to rails, communications, lighting and other facilities. According to the statistics of the railway engineering department, the service life of the rails in the leaking tunnel is about 1 / 2 of the normal state....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/76C08G18/10C08G18/66C08G18/48C08G18/32C08G18/75
CPCC08G18/10C08G18/3228C08G18/4804C08G18/4845C08G18/6685C08G18/755C08G18/7657C08G18/48
Inventor 易忠来靳昊李化建谭盐宾谢永江
Owner RAILWAY ENG RES INST CHINA ACADEMY OF RAILWAY SCI
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