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Water soluble polyurethane leak-stopping agent and its prepn

A technology of water-soluble polyurethane and preparation process, which can be applied in other chemical processes, chemical instruments and methods, etc., and can solve problems such as engineering quality problems, fractures, and rusting of steel bars.

Inactive Publication Date: 2005-03-30
SHANGHAI HUAYUE WATERPROOF MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, it is used for plugging and foundation reinforcement of underground projects, tunnels, reservoirs, pools, and slope protection of highways and railways. Most of them use fast fine cement for plugging. The water leakage at the concrete reinforcement cannot be completely plugged, resulting in the long-term immersion of the reinforcement in water, the reinforcement is rusted, and even broken, which leads to project quality problems

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0006] Example 1: One-component water-soluble polyurethane plugging agent. The composition ratio of the plugging agent is: toluene diisocyanate 95; polyoxyethylene polyoxypropylene fatty alcohol ether with a polyoxyethylene content of 10-60% 37; Polyoxyethylene polyoxypropylene fatty alcohol ether with a polyoxyethylene content of 60 to 90% 190; plasticizer dibutyl 75; polyglycerol oxyalkylene ether 45; tartaric acid 0.30; trichloroethylene 218; polyoxyethylene Polyoxyethylene polyoxypropylene fatty alcohol ether with a content of 10-60%, polyoxyethylene polyoxypropylene fatty alcohol ether with a polyoxyethylene content of 60-90%, polyglycerol oxyalkylene ether and dibutyl ester are put into the reaction according to the ratio Inside the kettle, heat to 110°C, dehydrate under reduced pressure for 2 hours, then add the proportion of toluene diisocyanate, reaction temperature 80°C, time 1.5 hours, add tartaric acid, and add trichloroethylene 45 for the first time after the temperat...

Embodiment 2

[0007] Example 2: The process is the same as in Example 1, and the composition ratio of the plugging agent is: toluene diisocyanate 120; polyoxyethylene polyoxypropylene fatty alcohol ether 50 with a polyoxyethylene content of 10-60%; polyoxyethylene Polyoxyethylene polyoxypropylene fatty alcohol ether 190 with a content of 60-90%; plasticizer dibutyl 90; polyglycerol oxyalkylene ether 60; tartaric acid 0.70; prepared directly after adding 45 parts of trichloroethylene during the preparation process It becomes a solvent-free water-soluble polyurethane plugging agent.

Embodiment 3

[0008] Example 3: Same as the process of Example 2, the composition ratio of the plugging agent composition is: toluene diisocyanate 110; polyoxyethylene polyoxypropylene fatty alcohol ether 45 with a polyoxyethylene content of 10-60%; polyoxyethylene Polyoxyethylene polyoxypropylene fatty alcohol ether 200 with a content of 60-90%; plasticizer dibutyl 80; polyglycerol alkylene oxide ether 55; tartaric acid 0.50; trichloroethylene 45; acetone 150. During the preparation process, 45 parts of trichloroethylene is added for the first time, and then when the temperature is between 35°C and 50°C, the proportioning acetone is added, and the mixture is stirred for 20-30 minutes to prepare a solvent-soluble polyurethane plugging agent.

[0009] For the three types of plugging agents obtained in the above examples, the technical indicators of the products are: viscosity 40~400mPa.s (23℃±0.5℃); density 1~1.2g / cm 3 (23℃±0.5℃); appearance is light yellow or amber transparent liquid; induced c...

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Abstract

The products of single-component water soluble polyurethane leak-stopping agent includes no-solvent type, fireproof type and solvent type, and they are used in stopping leak in underground engineering, foundation reinforcement and slope protecting engineering. The products have material composition of toluene diisocyante 95-120, No. 523 water soluble polyether 37-50, No. 521 water soluble polyether 190-215, plasticizer 75-90, No. 3050 polyether 45-60, tartaric acid 0.30-0.70, vinyl trichloride 38-218 and acetone 0-150. No. 523 water soluble polyether, No. 521 water soluble polyether, No. 3050 polyether and plasticizer are first thrown into reactor; toluene diisocyante is then added to produce prepolymer and tartaric acid is added at 50-60 deg.c; and finally, vinyl trichloride and acetone in different amount are added to produce water soluble polyurethane leak-stopping agent of different type.

Description

1. Technical Field: [0001] The invention relates to a preparation technology of polymer compounds, in particular to a water-soluble polyurethane plugging agent and its preparation process. The products are divided into solvent-free, solvent-containing and flame-retardant types, and are used in underground engineering for plugging and Foundation reinforcement, slope protection for roads and railways. 2. Background technology: [0002] At present, it is used for leak plugging and foundation reinforcement of underground projects, tunnels, reservoirs, pools, and slope protection of highways and railways. Most of them use fast precision cement to plug leaks. The plugging of this material can only be applied to the surface of the leak, especially Water leakage at the concrete steel bar cannot completely stop it, causing the steel bar to be soaked in water for a long time, the steel bar is rusty, or even broken, which leads to engineering quality problems. 3. Summary of the invention: ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L75/04C09K3/12
Inventor 张华戴君花
Owner SHANGHAI HUAYUE WATERPROOF MATERIAL