Preparation method of environment-friendly hydrophobic polyurethane grouting material

An environmentally friendly, grouting material technology, used in mining equipment, shaft equipment, earth-moving drilling and other directions, can solve the problems of natural environment pollution and high toxicity, reduce negative effects, use safety, and benefit health and environmental protection Effect

Active Publication Date: 2012-06-13
SHANGHAI DONGDA CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Toluene and xylene have a pungent smell and high toxicity, which have certain negative effects on construction personnel and the environment. At the same time, the flash points of these three organic solvents are all <60°C, and they are flammable and dangerous chemicals. , The use of each link brings many unsafe factors such as combustion, explosion, poisoning, etc.
It also pollutes the natural environment on which human beings depend

Method used

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  • Preparation method of environment-friendly hydrophobic polyurethane grouting material
  • Preparation method of environment-friendly hydrophobic polyurethane grouting material
  • Preparation method of environment-friendly hydrophobic polyurethane grouting material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Prepare environment-friendly hydrophobic polyurethane grouting material of the present invention according to the following steps

[0036] ①. Preparation of polyurethane prepolymer

[0037] Accurately weigh 30 parts by weight of polyether diol DL-1 with a number average molecular weight of 400, and 3 parts by weight of ethylene glycol, put them into the reaction kettle, and carry out negative pressure dehydration and degassing treatment for 3 hours under stirring, and cool down to 40±2 After ℃, add 200 parts by weight of polymethylene polyphenyl polyisocyanate PAPI PM-200, and carry out polymerization reaction for 3 hours at a temperature of 80±2℃, and control the -NCOwt% content of the prepolymer between 20% and 35%. is the end point of the reaction;

[0038] ②. Cool down, add additives

[0039] In the polyurethane prepolymer prepared in step ①, add 10 parts by weight of diglyme, fully dissolve under stirring, then add 0.003 parts by weight of phosphoric acid, 9 part...

Embodiment 2～ Embodiment 4

[0045] According to the method and steps of Example 1, prepare the environment-friendly hydrophobic polyurethane grouting material of the present invention according to the formula in Table 1

[0046] Table 1

[0047] Raw materials and product technical indicators

[0048] Viscosity at 25℃ mPa·s

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Abstract

The invention relates to a preparation method of an environment-friendly hydrophobic polyurethane grouting material, belonging to polyurethane compositions. The environment-friendly hydrophobic polyurethane grouting material is made from the following raw materials in parts by weight: 100 parts of polyurethane prepolymer, 1-6 parts of high-boiling-point solvent, 0.001-0.004 parts of retarder, 1-5parts of surfactant, 0.1-3 parts of catalyst and 10-30 parts of plasticizing agent. The invention provides the preparation method of the environment-friendly hydrophobic polyurethane grouting material which does not contain combustible, explosive, poisonous solvents and still has excellent technical indicators, such as service performance in grouting and bonding strength. The accidents of combustion, explosion and poisoning are avoided. The environment-friendly hydrophobic polyurethane grouting material is safe in use, is beneficial to the health of operating personnel and environmental protection, and is applicable to the construction of railways, highway tunnels, bridge constructions, and ports and docks, hydraulic power facilities, exploitation of mineral resources, embankment supporting projects, waterproofing treatment for the original construction of underground and underwater construction projects, and the normal maintenance and reinforcement and the fault repair treatment on water leakage and permeability for the on-service underground and underwater construction projects.

Description

technical field [0001] The invention relates to a method for preparing an environment-friendly hydrophobic polyurethane grouting material, belonging to polyurethane compositions. Background technique [0002] Since the advent of polyurethane grouting materials in the 1960s, with its unique chemical structure and adhesive properties, it can quickly trigger a crosslinking reaction when it encounters water, and enter the wall under the pressure of the perfusion pressure and the carbon dioxide gas generated by the foaming reaction. Fill the tiny cracks in the rock wall, and quickly solidify and bond with the rock wall or concrete wall material to be treated to block the leakage channel. It has excellent anti-seepage, plugging, filling and reinforcement functions. Therefore, it is widely used in many fields such as railways, highway tunnels, bridge engineering, port construction, hydropower facilities, mining of mineral resources, river embankment support engineering, undergroun...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L75/08C08G18/66C08G18/48C08G18/12E01D19/08E02B3/16E02D31/02E21D11/38
Inventor 董建国马立青于鹏程王振波杜辉
Owner SHANGHAI DONGDA CHEM
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