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Environment-friendly polyurethane grouting material and preparation method thereof

A grouting material and an environment-friendly technology, applied in the field of polyurethane chemical grouting materials and preparation, can solve problems such as increasing costs and achieve the effect of reducing fire hazards

Active Publication Date: 2016-01-13
山西浩博瑞新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the common polyurethane grouting material in the market in our country is acetone system. Since the closed cup flash point of acetone is -20°C, the open cup flash point is -10°C, and the boiling point is only 56.2°C, it is an out-and-out grouting material. Dangerous flammable and explosive chemicals, and one of the raw materials for precursor drugs, every time you buy acetone, you need to apply for a purchase permit, and you need to apply for a transport operation certificate for dangerous chemicals and precursor drugs, which not only improves safety management requirements, and increased costs

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] A polyurethane grouting anti-leakage material, comprising the following components in parts by weight:

[0023] Pump 900 parts of hydrophilic polyether with a molecular weight of 1000 and a hydroxyl value of 168mgKOH / g into the reactor, and take samples to measure the moisture by the Karl Fischer method. until the moisture is qualified), start stirring, add accurately measured 111 parts of MDI, stir for 30 minutes and then heat up, keep the constant temperature at 45°C for 1h, then continue to heat up to 80°C, and keep for 3.5h. Detect the -NCO content therein, and stop the reaction when there is almost no (indicating that the MDI is completely capped). Cool to room temperature (25°C), and keep sealed until use.

[0024] Preparation of prepolymer: under anaerobic and anhydrous conditions, mix polyether diols with a molecular weight of 1000-2000 and benzoyl chloride, put them into a reaction kettle, carry out negative pressure dehydration and degassing treatment for 1.5...

Embodiment 2

[0027] Pump 800 parts of hydrophilic polyether with a molecular weight of 1000 and a hydroxyl value of 168mgKOH / g into the reactor, and take samples to measure the moisture by the Karl Fischer method. until the moisture is qualified), start stirring, add 99 parts of MDI accurately measured, stir for 30 minutes and then heat up, keep the constant temperature at 50°C for 1h, then continue to heat up to 85°C, and keep for 4.0h. Detect the -NCO content therein, and stop the reaction when there is almost no (indicating that the MDI is completely capped). Cool to room temperature (25°C), and keep sealed until use.

[0028] Preparation of prepolymer: under anaerobic and anhydrous conditions, mix polyether diols with a molecular weight of 1000-2000 and benzoyl chloride, put them into a reaction kettle, carry out negative pressure dehydration and degassing treatment for 1.5 hours under stirring, and cool down to Add the hydroxyl-terminated prepolymer after 10°C, and carry out the poly...

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PUM

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Abstract

The invention relates to an environment-friendly polyurethane grouting material. A preparation method comprises the following steps: mixing polyether polyol and a retarder in the absence of oxygen and water; putting the mixture into a reaction kettle and adding a hydroxyl-terminated prepolymer in a stirring manner; carrying out a polymerization reaction for 2 to 3 hours at 78 DEG C to 85 DEG C; controlling the weight percent of -NCO in the prepolymer and detecting the content of -NCO in the prepolymer; stopping the reaction until the content of - NCO is between 5.6% and 6.0%; and cooling to a room temperature.

Description

technical field [0001] The invention belongs to waterproof plugging technology, and provides a polyurethane chemical grouting material and a preparation method. Background technique [0002] Polyurethane, referred to as polyurethane. The English name is polyurethane, referred to as PU. Macromolecular polymers containing many carbamate groups (-NHCOO-) on the main chain of the polymer structure are collectively called polyurethanes, which are polyadditions of organic diisocyanates or polyisocyanates and dihydroxy or polyhydroxy compounds. made. Polyurethane material is a kind of engineering material with a very wide range of uses. Most of its industrial production is prepared by the reaction of organic isocyanate and a variety of compounds containing terminal hydroxyl groups. According to the different functional groups selected and applied in actual production or the different processing methods, polyurethane industrial products with different functions and expressions ca...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G18/48C08G18/10C08L75/08
CPCC08G18/10C08G18/4837C08G2101/00C08G2190/00C08G18/48
Inventor 杨小波
Owner 山西浩博瑞新材料有限公司