Polyurethane grouting material and preparation method thereof

A grouting material and polyurethane technology, applied in the field of polyurethane grouting material and its preparation, can solve the problems of poor injectability, toxicity of organic chemical grouting materials, environmental protection restrictions, etc., and achieve low volatile components, fast and effective sealing. The effect of blocking water and convenient construction

Inactive Publication Date: 2017-12-08
CHINA UNIV OF GEOSCIENCES (BEIJING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0018] In order to overcome the problems of poor injectability of existing inorganic grouting materials, toxicity of organic chemical grouting materials, and environmental protection restrictions, the invention provides a polyurethane grouting material formula and its preparation method

Method used

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  • Polyurethane grouting material and preparation method thereof
  • Polyurethane grouting material and preparation method thereof

Examples

Experimental program
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Effect test

preparation example Construction

[0043] A preparation method of polyurethane grouting material, comprising the following steps:

[0044] 1) Accurately weigh a certain mass of polyol, the amount of additive added is calculated according to the percentage of the mass of polyol, after the addition, fully stir with a glass rod to form component B together;

[0045] 2) Weigh polyisocyanate equal to the volume of component B as component A;

[0046] 3) Add an appropriate amount of water to component B to simulate an underground water-rich environment (above 1g);

[0047] 4) Mix components A and B and stir quickly and fully. The system starts to foam and expand, the liquid level rises slowly, and the system gradually becomes viscous. When it reaches a certain height, it stops foaming and rising, and the product gradually hardens. Strength and stiffness, and no stick when the reaction is over.

Embodiment

[0049] The polyisocyanate selected in this embodiment is the polymerized MDI produced by Jining Huakai Resin Co., Ltd., which is a brown liquid at room temperature, with a density of 1.23g / cm3 and a viscosity of 170 ± 5mPa s; polyols are produced by Haian Petrochemical Plant in Jiangsu Province Polyoxypropylene diol, colorless oily liquid at room temperature, density 1.19g / cm3, viscosity 150±5mPa·s; in order to coordinate the reaction of polyisocyanate with polyol and water, tertiary amine catalyst and organotin catalyst are selected at the same time, tertiary The amine catalyst is triethanolamine produced by Sinopharm Chemical Reagent Co., Ltd.; the organic tin catalyst is dibutyltin dilaurate produced by Tianjin Guangxia Fine Chemical Research Institute; the chain-extending cross-linking agent is produced by Sinopharm Chemical Reagent Co., Ltd. The ethylene glycol; Foam stabilizer selects dimethyl silicone oil produced by Guangzhou Suixin Chemical Co., Ltd.

[0050] Raw mate...

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Abstract

The invention discloses a polyurethane grouting material and a preparation method thereof. The polyurethane grouting material comprises polyhydric alcohols, polyisocyanates, an organic amine catalyst, an organic tin catalyst, a chain extender and a foam stabilizer. The content of the components is as follows: 1 part of polyhydric alcohols and 1 part of polyisocyanates are contained; the content of the organic amine catalyst is 0.3% of the mass of the polyhydric alcohols; the content of the organic tin catalyst is 1.6% of the mass of the polyhydric alcohols; the content of the chain extender is 0.6% of the mass of the polyhydric alcohols; the content of the foam stabilizer is 1.0% of the mass of the polyhydric alcohols. The preparation method comprises the following steps: dividing the raw materials into two components, wherein the component A includes polyisocyanates and the component B includes the polyhydric alcohols and the additives; adding a defined amount of water into the component B; mixing the components A and B and quickly and fully stirring. The polyurethane grouting material prepared according to the preparation method has the advantages of low toxicity, low pollution, excellent grouting performance, low cost, convenience in construction, and the like, and meets national relevant standard and requirement for water plugging construction in China.

Description

technical field [0001] The invention belongs to the technical field of chemical materials and grouting engineering, and in particular relates to a polyurethane grouting material and a preparation method thereof. Background technique [0002] At present, more than 30 cities in my country are undergoing subway construction. In the construction of subway tunnels, sandy soil strata with low bearing capacity, strong permeability and poor self-stabilization ability are often encountered, especially in the presence of a large amount of confined water. Causing accidents such as piping, landslides, uneven settlement, etc., the excavation is difficult, the construction cost is high, and the risk is high. It not only threatens the life safety of construction personnel, affects the quality of the project and the construction progress, but also induces surface geological disasters and damages the surrounding areas of the construction. The ecological environment of the site. [0003] Due t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/76C08G18/66C08G18/48C08G18/32C08J9/08C08G101/00
CPCC08G18/3206C08G18/4825C08G18/6674C08G18/6688C08G18/7664C08G2110/0083
Inventor 王贵和史博研黄峰杨洪磊
Owner CHINA UNIV OF GEOSCIENCES (BEIJING)
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