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Solvent-free one-component polyurethane grouting material and preparation method thereof

A grouting material and one-component technology, which is applied in the field of solvent-free one-component polyurethane grouting material and its preparation, can solve the problems of environmental pollution, inability to quickly block water, solvent-based polyurethane grouting material is not environmentally friendly, and achieve hydrophilicity Good performance, good adhesion effect

Inactive Publication Date: 2018-06-08
SHANGHAI DONGDA CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The technical problem solved by the present invention is to overcome the defects that the existing solvent-based polyurethane grouting materials are not environmentally friendly, have environmental pollution, and the existing solvent-free polyurethane grouting materials cannot quickly block water, and provide a solvent-free single-component Part polyurethane grouting material and preparation method thereof

Method used

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  • Solvent-free one-component polyurethane grouting material and preparation method thereof

Examples

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Effect test

Embodiment 1

[0034] A solvent-free one-component polyurethane grouting material, which is prepared by the following preparation method:

[0035] (1) Put 100g of hydrophilic polyether polyol DJ-1 into the reaction kettle, raise the temperature to 100°C, stir, vacuum dehydrate and degas for 3 hours, cool down to 50°C, then add 45g of toluene diisocyanate TDI-80, in At a reaction temperature of 80°C, the reaction polymerization was carried out for 3 hours to obtain 145 polyurethane prepolymers; among them, the functionality of the hydrophilic polyether polyol DJ-1 was 3, and the number average molecular weight was 12000; the -NCO of the polyurethane prepolymer The content is 14.26%;

[0036] (2) Cool down to 50°C, fully stir and mix the polyurethane prepolymer obtained in step (1) with 3g water-soluble silicone oil AK8805, 0.75g bismorpholino diethyl ether and 15g diethyl phthalate, namely have to.

Embodiment 2

[0038] A solvent-free one-component polyurethane grouting material, which is prepared by the following preparation method:

[0039] (1) Put 100g of hydrophilic polyether polyol DJ-2 into the reaction kettle, raise the temperature to 102°C, stir, vacuum dehydrate and degas for 3 hours, cool down to 52°C, and then add 100g of diphenylmethane diisocyanate MDI- 50, at a reaction temperature of 82°C, react and polymerize for 3 hours to obtain 200 g of polyurethane prepolymer; among them, the functionality of the hydrophilic polyether polyol DJ-2 is 2, and the number average molecular weight is 8000; the polyurethane prepolymer The -NCO content is 16.28%;

[0040] (2) Lower the temperature to 52°C, fully stir and mix the polyurethane prepolymer obtained in step (1) with 4g of water-soluble silicone oil 8407, 2g of N-ethylmorpholine and 15g of dioctyl phthalate.

Embodiment 3

[0042] A solvent-free one-component polyurethane grouting material, which is prepared by the following preparation method:

[0043] (1) Put 100g of hydrophilic polyether polyol DJ-3 into the reactor, raise the temperature to 98°C, stir, vacuum dehydrate and degas for 3 hours, cool down to 48°C, then add 25g of toluene diisocyanate TDI-80 and 50g Diphenylmethane diisocyanate MDI-50, at a reaction temperature of 78 ° C, reacted and polymerized for 3 hours to obtain 175 g of polyurethane prepolymer; among them, the functionality of the hydrophilic polyether polyol DJ-3 was 3, and the number average The molecular weight is 10000; the -NCO content of the polyurethane prepolymer is 15.78%;

[0044] (2) Cool down to 48°C, mix the polyurethane prepolymer obtained in step (1) with 0.75g water-soluble silicone oil 8407, 0.75g water-soluble silicone oil AK8805, 1.2g N-ethylmorpholine, 6g diethyl phthalate and 6g of dioctyl phthalate was fully stirred and mixed evenly to obtain the product...

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Abstract

The invention discloses a solvent-free one-component polyurethane grouting material and a preparation method thereof. The preparation method comprises the following steps: (1) mixing hydrophilic polyether polyol with organic polyisocyanate for reaction polymerization to obtain a polyurethane prepolymer, wherein hydrophilic polyether polyol has functionality of 2-3 and number average molecular weight of 8000-12000; (2) mixing the polyurethane prepolymer with a surfactant, a catalyst and a plasticizer to obtain the grouting material. The solvent-free one-component polyurethane grouting materialhas good hydrophilicity, is subjected to reaction rapidly in water, can plug water quickly, has better adhesion, and can have a reaction with water to form polyurethane foam with good toughness; tinygaps in the treatment part can be completely filled, and the material is environmentally friendly and pollution-free.

Description

technical field [0001] The invention relates to a solvent-free one-component polyurethane grouting material and a preparation method thereof. Background technique [0002] In the modern construction industry, a large number of chemical grouting materials are used for foundation reinforcement, tunnel roof support, construction water-blocking curtain partition, repair of ruptured dams, etc. Polyurethane grouting material is a kind of chemical grouting material. Because of its excellent performance, it has become one of the most rapidly developed and widely used chemical grouting materials. [0003] Polyurethane grouting materials are divided into one-component and two-component. Polyurethane one-component grouting material is a material that uses its highly active -NCO group and the moisture exuded from the foundation as another component to react with gel consolidation. The polyurethane one-component grouting material not only maintains the high permeability of the grout, b...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/48C08G18/10C08K5/12
CPCC08G18/4829C08G18/10C08G18/4825C08K5/12C08G18/302
Inventor 马立青郭东雷杨林超杜辉董建国
Owner SHANGHAI DONGDA CHEM
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