A kind of polyurethane grouting material and its preparation method and application

A grouting material and polyurethane technology, applied in the field of grouting engineering and polymer materials, can solve the problems of cell ablation and collapse, affect the strength, and react violently, so as to increase the compressive strength and toughness, increase the compatibility, and increase the reaction. Highly active effect

Active Publication Date: 2021-09-21
ZHONGLU HI TECH (BEIJING) HIGHWAY TECHNOLOGY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, polyurethane grouting material belongs to exothermic reaction, and the reaction is violent, fast, and generates a lot of heat, causing local cell ablation and collapse, affecting strength, and even safety accidents

Method used

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  • A kind of polyurethane grouting material and its preparation method and application
  • A kind of polyurethane grouting material and its preparation method and application
  • A kind of polyurethane grouting material and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] 1. Preparation of component A of polyurethane grouting material

[0052] 1A), prepare component A raw materials (g) according to the following weight ratio:

[0053]

[0054] Among them: polyether polyols include propylene oxide-ethylene oxide copolyether triol and polyoxypropylene triol, wherein the functionality of propylene oxide-ethylene oxide copolyether triol is 3, the average molecular weight is 600, and the hydroxyl value is 330 mgKOH / g; The functionality of polyoxypropylene triol is 3, the average molecular weight is 3000, and the hydroxyl value is 36KOH / g; the weight ratio of propylene oxide-ethylene oxide copolyether triol to polyoxypropylene triol is 1:1, that is, propylene oxide -Ethylene oxide copolyether triol is 50g, and polyoxypropylene triol is 50g; The functionality of ethylenediamine polyether tetraol is 4, the average molecular weight is 300, and the hydroxyl value is 770mgKOH / g; Bisphenol A epoxy resin is E44; The average molecular weight of hy...

Embodiment 2

[0072] 1. Preparation of component A of polyurethane grouting material

[0073] 1A), prepare component A raw materials (g) according to the following weight:

[0074]

[0075] Among them: polyether polyol includes polyoxypropylene diol and rosin ester polyol, wherein the functionality of polyoxypropylene diol is 2, the average molecular weight is 2000, and the hydroxyl value is 56; the functionality of rosin ester polyol is 3, and the average The molecular weight is 280, the hydroxyl value is 400mgKOH / g; the weight ratio of polyoxypropylene diol and rosin ester polyol is 1:1, that is, the polyoxypropylene diol is 50g, and the rosin ester polyol is 50g; toluene diamine polyether Tetrol has a functionality of 4, an average molecular weight of 600, and a hydroxyl value of 410 mgKOH / g; bisphenol F epoxy resin NPEF-170;

[0076] In this embodiment, polyoxypropylene diol and rosin ester polyol in the polyether polyol compound are mixed in a weight ratio of 1:1 as an example for ...

Embodiment 2A

[0090] 1. Preparation of component A of polyurethane grouting material

[0091] 1A), prepare component A raw materials (g) according to the following weight:

[0092]

[0093] Among them: polyether polyol is polyoxypropylene triol, wherein the functionality of polyoxypropylene triol is 3, the average molecular weight is 350, and the hydroxyl value is 500mgKOH / g; 4, the average molecular weight is 300, and the hydroxyl value is 760mgKOH / g; bisphenol S-type epoxy resin is 185s; the average molecular weight of hydroxyl-terminated liquid nitrile rubber is 3000;

[0094] Polyoxypropylene triol in the polyether polyol compound in this embodiment is illustrated as an example. In the present invention, polyether polyol can be one or multiple polyols. When multiple polyols are included, multiple polyols Alcohols can be mixed in any proportion.

[0095] Compounds mixed with polyether polyols with an average functionality of 2-8, an average molecular weight of 200-4000, and a hydrox...

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Abstract

The invention relates to a polyurethane grouting material, its preparation method and application, and discloses a polyurethane compound for grouting, its preparation method and its application. The polyurethane compound consists of two components, A and B. The A The components include: polyether polyol, amino polyol, epoxy resin, foaming agent, toughening agent, phase change material, reactive diluent, compatibilizer, retarder; the B component is polyisocyanate . The polyurethane grouting material of the present invention has good toughness, excellent bonding effect, can cool down, is self-catalyzed, has the characteristics of lipophilic and hydrophilic grouting, and is not only suitable for hollowing out, cracks, grouting of road surface bases of highway tunnels, bridges, etc. It can also be used for water conservancy and power facilities, mining of mineral resources, underground and underwater construction projects for waterproofing, maintenance, reinforcement, and emergency repair of water leakage and permeation.

Description

technical field [0001] The invention relates to the field of polymer materials and the technical field of grouting engineering, in particular to a polyurethane grouting material and a preparation method thereof. Background technique [0002] As of the end of 2017, the mileage of traffic has reached 136,000 kilometers. With the increase of construction mileage, road maintenance has gradually become one of the important tasks of the road construction industry. The problem of deep cracks and voids in highways is one of the most common diseases. Cracks and voids not only affect road driving comfort, but also reduce the bearing capacity of the surface layer. Under complex climate changes and heavy traffic loads, if cracks and voids If it is not repaired, it will easily expand into structural damage of the road surface and shorten the service life of the road. Traditional excavation, backfilling, milling, overlay and other work not only take a long time to maintain, but also have...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G18/69C08G18/58C08G18/50C08G18/48C08G101/00
CPCC08G18/4009C08G18/4804C08G18/482C08G18/4825C08G18/4829C08G18/5024C08G18/5027C08G18/58C08G18/696C08G2110/0083
Inventor 张艳君曹东伟夏磊
Owner ZHONGLU HI TECH (BEIJING) HIGHWAY TECHNOLOGY CO LTD
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