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Polyurethane grouting material and preparation method thereof

A grouting material and polyurethane technology, applied in the field of grouting materials, can solve the problems of large proportion of self-condensation, poor fluidity, and inability to fill internal gaps.

Inactive Publication Date: 2020-04-28
南通市裕如工程材料有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing polyurethane grouting materials tend to generate high internal heat during the expansion process, and have poor fluidity during the grouting process
As a result, the polyurethane grouting material has a poor filling effect in the process of grouting some special locations, especially when grouting buildings with deep gaps, it is easy to cause excessive internal self-condensation due to excessive internal heat, making the internal gaps unable to fill up

Method used

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  • Polyurethane grouting material and preparation method thereof

Examples

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Embodiment 1

[0021] This specific embodiment discloses a kind of polyurethane grouting material, and it is made up of modifier, isocyanate, polyether polyol, modified adhesive, acrylate, plasticizer, catalyst, retarder and dispersant, described The modifying agent is a fiber slurry, and the molar ratio of the -NCO group of the isocyanate to the -OH in the polyether polyol is 10:1. In this specific example, the isocyanate is hexamethylene diisocyanate, The weight ratio of the prepolymer formed by the acrylate to the isocyanate and polyether polyol is 1:5, and the weight ratio of the prepolymer formed by the modified adhesive to the isocyanate and polyether polyol is 1:4 , the weight ratio of the prepolymer formed by the plasticizer to isocyanate and polyether polyol is 1:2, and the weight ratio of the prepolymer formed by the catalyst to isocyanate and polyether polyol is 1:200, so The weight ratio of the prepolymer formed by the retarder and isocyanate and polyether polyol is 1:100, and th...

Embodiment 2

[0031] This specific embodiment discloses a kind of polyurethane grouting material, and it is made up of modifier, isocyanate, polyether polyol, modified adhesive, acrylate, plasticizer, catalyst, retarder and dispersant, described The modifying agent is a fiber slurry, and the molar ratio of the -NCO group of the isocyanate to the -OH in the polyether polyol is 10:1. In this specific example, the isocyanate is diphenylmethane diisocyanate, The weight ratio of the prepolymer formed by the acrylate to the isocyanate and polyether polyol is 1:5, and the weight ratio of the prepolymer formed by the modified adhesive to the isocyanate and polyether polyol is 1:4 , the weight ratio of the prepolymer formed by the plasticizer to isocyanate and polyether polyol is 1:2, and the weight ratio of the prepolymer formed by the catalyst to isocyanate and polyether polyol is 1:200, so The weight ratio of the prepolymer formed by the retarder and isocyanate and polyether polyol is 1:100, and ...

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Abstract

The invention discloses a polyurethane grouting material, and relates to the field of grouting materials. The polyurethane grouting material is composed of a modifier, isocyanate, polyether polyol, amodified adhesive, acrylate, a plasticizer, a catalyst, a retarder and a dispersing agent, wherein the modifier is fiber pulp or nylon 6, the mass ratio of -NCO groups of isocyanate to -OH in polyether polyol is 10: 1, and the modified adhesive is isocyanurate modified toluene diisocynate. The invention also discloses a preparation method of the polyurethane grouting material. The polyurethane grouting material is prepared by preparing a prepolymer, adding a modifier and the like. The polyurethane grouting material has the advantages that the fiber slurry or the nylon 6 is added into the polyurethane grouting material so that the fluidity of the polyurethane grouting material in the use process is enhanced, and the cohesive elastomer is formed by using the modified toluene diisocynate so that the internal heat can be effectively reduced after grouting, and shrinkage caused by cohesion is avoided.

Description

technical field [0001] The invention relates to the field of grouting materials, in particular to a polyurethane grouting material and a preparation method thereof. Background technique [0002] The grouting material is injected into structures such as buildings or pavements through grouting, and reacts with water to form a water-insoluble grout material with a certain degree of elasticity or strength consolidation. In the prior art, grouting materials are commonly used in roadbed repairs, bridge repairs and building repairs. In the prior art, polyurethane grouting materials are used for repairs. However, the existing polyurethane grouting materials tend to generate high internal heat during the expansion process, and have poor fluidity during the grouting process. As a result, the polyurethane grouting material has a poor filling effect in the process of grouting some special locations, especially when grouting buildings with deep gaps, it is easy to cause excessive intern...

Claims

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Application Information

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IPC IPC(8): C08G18/48C08G18/10C08G18/79C08K7/14C08L77/02C08L75/08
CPCC08G18/4825C08G18/10C08G18/794C08K7/14C08L77/02C08L75/08
Inventor 姜如宏
Owner 南通市裕如工程材料有限责任公司