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Method for preparing organic and inorganic hybridization modified polyurethane chemical grouting material

A technology for polyurethane chemistry and grouting materials, which is applied in the field of preparation of organic-inorganic hybrid modified polyurethane chemical grouting materials, can solve the problems of less side reactions and poor compatibility, and achieves reduced toxicity, improved mechanical properties, and great competition. force effect

Active Publication Date: 2013-04-03
HEBEI TONGCHENG MINING TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is to overcome the disadvantages of the existing polymer grouting material preparation method, and provide a preparation method of organic-inorganic hybrid modified polyurethane chemical grouting material; Polymer and expandable phenolic resin form two-component system material A; secondly, inorganic silicate solution, amine catalyst and organotin catalyst are mixed to form material B; thirdly, material A and material B are mixed, and fully After stirring, a new type of grouting material with stable performance can be obtained; the system has less side reactions, the reaction is easy to control, and the gel time of the grouting material can be accurately controlled; A special expandable phenolic resin is used in material A, which solves the problem of polyurethane prepolymer and bulk phenolic resin. The compatibility of the resin is poor, and the reaction speed between the phenolic resin and the isocyanate group is stable, and the grout obtained after mixing with the B material has excellent characteristics of flame retardancy, high mechanical strength, and good corrosion resistance and aging performance

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] ① Weigh 82 parts of water-soluble isocyanate-terminated polyether prepolymer in the container, the -NCO group content is 17.5%, the viscosity is 230mPa·s, the temperature is 25°C, add 16 parts of special expandable phenolic resin, which contains The water content is 3.5%, the viscosity is 1400mPa·s, and the temperature is 25°C. After stirring evenly, add 2 parts of surfactant silicone oil DC-193, and stir evenly to obtain component A;

[0021] ② Weigh 96 parts of inorganic silicate solution with specific modulus, add 3 parts of triethylenediamine and 1 part of dibutyltin dilaurate, stir well to obtain component B;

[0022] ③Mix component A and component B fully and stir for 18s, and solidify under normal temperature and pressure to prepare organic-inorganic hybrid modified polyurethane chemical grouting material.

Embodiment 2

[0024] ①Weigh 80 parts of water-soluble isocyanate-terminated polyether prepolymer in the container, the -NCO group content is 18.2%, the viscosity is 220mPa s, add 17 parts of special expandable phenolic resin, the water content is 4.8%, the viscosity 1200mPa·s, the temperature is 25°C, after stirring evenly, add 3 parts of surfactant Tween 80 (TWEEN-80), stir evenly to obtain component A;

[0025] ②Weigh 96 parts of inorganic silicate solution, add 3 parts of triethylamine and 1 part of stannous octoate, stir well to obtain component B;

[0026] ③Mix component A and component B fully and stir for 24s, and solidify under normal temperature and pressure to prepare organic-inorganic hybrid modified polyurethane chemical grouting material.

Embodiment 3

[0028] ① Weigh 80 parts of water-soluble terminal isocyanate-polyether prepolymer in the container, the -NCO group content is 19.2%, the viscosity is 210mPa·s, add 16 parts of special expandable phenolic resin, its water content is 5.3%, The viscosity is 1380mPa·s, the temperature is 25°C, after stirring evenly, add 4 parts of surfactant Tween 80 (TWEEN-80), stir evenly, and obtain component A;

[0029] ②Weigh 96 parts of inorganic silicate solution with specific modulus, add 3 parts of N,N-dimethylbenzylamine and 1 part of dibutyltin dilaurate, stir well to obtain component B;

[0030] ③Mix component A and component B fully and stir for 30s, and solidify under normal temperature and pressure to prepare organic-inorganic hybrid modified polyurethane chemical grouting material.

[0031] The prepared organic-inorganic hybrid modified polyurethane chemical grouting material has low toxic chemical content, suitable viscosity, accurate gel time control, stable performance, bonding ...

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Abstract

The invention discloses a method for preparing an organic and inorganic hybridization modified polyurethane chemical grouting material. The method adopts water-soluble end isocyanate-polyether prepolymer, special expandable phenol-formaldhyde resin and a surfactant to form a component A; and inosilicate liquor, an amine catalyst and an organic tin catalyst form a component B, and the component A and the component B are mixed and stirred uniformly. The chemical grouting material has the advantages of wide raw material sources, low cost, stable performance, appropriate viscosity, accurate gelation time control, low toxic chemical composition content, good flame retardant property, high adhesive strength, high stone forming rate, low permeability, high mechanical strength and good corrosion resistance and aging characteristic.

Description

technical field [0001] The invention relates to a preparation method of a polymer grouting material, in particular to a preparation method of an organic-inorganic hybrid modified polyurethane chemical grouting material. Background technique [0002] The current civil construction projects are dominated by concrete structures. Cracks inevitably exist in concrete structures due to external factors, or cracks appear during use. Cracks are the main reason for the reduction of the bearing capacity, durability and water resistance of concrete structures. Therefore, the control and treatment of cracks is very important, and the method of concrete crack repair is the pressure grouting method, which requires a large amount of grouting materials (experimental research on high-performance grouting materials [J]. Shanxi Architecture, 2012 ,38(1): 110~111); At present, polymers, such as epoxy resin, are used as grouting materials to repair cracks in concrete structures, and generally sat...

Claims

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Application Information

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IPC IPC(8): C08G18/54C08G18/48C08G18/10C08K3/34C08L75/08
Inventor 宋彦波
Owner HEBEI TONGCHENG MINING TECH
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