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Polyurethane grouting material and preparation method thereof

A grouting material, polyurethane technology, applied in the directions of reagents, educts, products, etc., can solve the problems of residual free TDI, environmental hazards, and high viscosity

Inactive Publication Date: 2013-07-24
BEIJING ORIENTAL YUHONG WATERPROOF TECH CO LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the above-mentioned products all face an obvious problem. As grouting materials, these products have high viscosity, and usually contain free TDI and low-boiling point additives, which pose a certain harm to the environment.

Method used

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024]

[0025] The preparation method of one-component polyurethane grouting material is as follows:

[0026] In the interlayer reaction kettle, add polyether polyol and dioctyl phthalate according to the formula, dehydrate for 2 to 3 hours at a temperature of 110-120°C and a vacuum of -0.1MPa, and cool down to 60 ℃, add small molecule chain extender, stir evenly, add MDI, slowly raise the temperature to 85°C, react for two hours, cool down to below 30°C, add additives, stir evenly, then discharge, fill with nitrogen and seal the package. When using, open the package and use directly.

Embodiment 2

[0028]

[0029] The preparation method of one-component polyurethane grouting material is as follows:

[0030] In the interlayer reaction kettle, add polyether polyol and dioctyl phthalate according to the formula, dehydrate for 2 to 3 hours at a temperature of 110-120°C and a vacuum of -0.1MPa, and cool down to 60 ℃, add MDI-50, slowly raise the temperature to 85 ℃, react for two hours, cool down to below 30 ℃, add additives, stir evenly, discharge, fill with nitrogen and seal the package. When using, open the package and use directly.

Embodiment 3

[0032]

[0033] The preparation method of one-component polyurethane grouting material is as follows:

[0034] In the interlayer reaction kettle, add polyether polyol and dioctyl phthalate according to the formula, dehydrate for 2 to 3 hours at a temperature of 110-120°C and a vacuum of -0.1MPa, and cool down to 60 ℃, add PAPI, slowly raise the temperature to 75°C, react for two hours, cool down to below 30°C, add additives, stir evenly, discharge, fill with nitrogen and seal the package. When using, open the package and use directly.

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PUM

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Abstract

The invention discloses a polyurethane grouting material which is a high-elasticity single-component polyurethane resin material and comprises the following components: a prepolymer formed from polyether polyol and polyisocyanate under the action of a chain extender, a plasticizer and a catalyst. The polyurethane grouting material disclosed by the invention has the characteristics of good elasticity, low viscosity, convenience in construction, no shrinkage and the like; the elasticity is good, so that the polyurethane grouting material can be used for seepage prevention and leakage blocking of movable cracks; the viscosity is low, so that the polyurethane grouting material can be grouted into small cracks, and the construction is convenient; the polyurethane grouting material has no solvent and no volatile liquid, and is environment-friendly; and the polyurethane grouting material does not shrink and can avoid secondary seepage after grouting.

Description

technical field [0001] The invention relates to a polyurethane grouting material and belongs to the field of building materials. Background technique [0002] Polyurethane material is currently the chemical grouting material with the most product types, the widest application range and the largest amount of grouting material. Generally speaking, it can be divided into two types according to the material characteristics: hydrophilic (water-soluble) and hydrophobic (oil-soluble) ), the hydrophilic polyurethane grouting material is mainly polymerized with polyisocyanate and high-molecular-weight multifunctional hydrophilic polyether polyol. In order to ensure low viscosity, the isocyanate is mostly made of TDI, and then added with a hydrophilic solvent. Such products It contains a lot of free TDI, and its environmental protection performance is poor; the hydrophobic polyurethane grouting material is mainly polymerized with polyisocyanate and ordinary polyether polyol, with solv...

Claims

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Application Information

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IPC IPC(8): C08L75/08C08K5/12C08G18/76C08G18/66C08G18/48
CPCY02P20/141
Inventor 郑先军李红英
Owner BEIJING ORIENTAL YUHONG WATERPROOF TECH CO LTD
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