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Polyurethane strengthening water shutoff material special for mining and preparation method thereof

A technology of polyurethane and raw materials, which is applied in the field of polyurethane reinforced water blocking materials and its preparation, and polyurethane compositions. It can solve problems such as poor filling and reinforcement effects, high bonding strength, and difficult construction, so as to prevent and reduce accidents and reactions. The effect of low temperature and reduction of personnel

Inactive Publication Date: 2013-09-11
SHANGHAI DONGDA CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In the prior art, cement slurry is used to fill the cracks, the filling and reinforcement effect is not good, and it is time-consuming, laborious and difficult to construct
Moderate viscosity, convenient construction, good filling performance; curing at room temperature, saving time and labor; high bonding strength, good reinforcement effect Polyurethane reinforced water blocking material for mining has not been reported in the literature

Method used

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  • Polyurethane strengthening water shutoff material special for mining and preparation method thereof
  • Polyurethane strengthening water shutoff material special for mining and preparation method thereof
  • Polyurethane strengthening water shutoff material special for mining and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Embodiment 1 According to the following steps, the special polyurethane reinforced water blocking material for mining of the present invention is prepared

[0035] ①. Preparation of component A

[0036] Accurately metered polyoxypropylene tetrahydric alcohol 635H67 parts by weight with a hydroxyl value of 400-460 mgKOH / g, foam stabilizer H32015 parts by weight, flame retardant tris (2-chloropropyl) phosphate TCPP27 parts by weight, catalyst dilaurel Put 1 weight part of dibutyltin acid into the reaction kettle, stir and mix for 3 to 4 hours at room temperature, discharge, and seal the package;

[0037] ②. Preparation of component B

[0038] Accurately weigh 20 parts by weight of polyoxypropylene diol DL-40020 with a relative molecular weight of 400±10 and put it into a polymerization reactor. Under stirring, heat up to 80-100°C, vacuum dehydrate and degas for 2-3 hours, and cool down to 10-100°C. 40°C, put in 80 parts by weight of polymethylene polyphenyl polyisocyana...

Embodiment 2～ Embodiment 5

[0041] According to the method and steps of Example 1, the special polyurethane reinforced water blocking material for mining of the present invention is prepared according to the formula in Table 1

[0042] Table 1

[0043]

[0044]

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PUM

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Abstract

The invention provides a polyurethane strengthening water shutoff material special for mining and a preparation method thereof. The polyurethane strengthening water shutoff material special for mining belongs to polyurethane compositions and is characterized by consisting of a component A and a component B according to the weight ratio of A:B=1:1, wherein the component A consists of, by weight, 63-77 parts of polyether polylol, 3.0-6.0 parts of foam stabilizer, 20-30 parts of flame retardant and 0.1-1 part of catalyst; and the component B consists of, by weight, 10-20 parts of polyether polylol, 80-90 parts of polyisocyanate and 0.001 part of storage stabilizer. The polyurethane strengthening water shutoff material special for mining and the preparation method are moderate in viscosity, convenient to construct, good in filling performance, cured in room temperature, time-saving, labor-saving, good in strengthening effect and excellent in water shutoff performance and flame retardant performance, have the advantages of being quick in reaction speed, low in reaction temperature, good in fluidity, strong in caking property and high in flame retardant performance, and are suitable for filling, strengthening, water shutoff and anti-seepage treatment of rock stratums in mining areas.

Description

technical field [0001] The invention is a special polyurethane reinforced water blocking material for mining and a preparation method thereof. It belongs to polyurethane composition. Background technique [0002] The continuous mining of mineral resources leads to the continuous increase of the depth of the rock formation. As the mining time continues, cracks will appear on the rock wall, and concrete structures such as tunnels and roadways will also appear cracks due to aging, and even landslides and water seepage accidents will pose a threat to safe production. threaten. Therefore, timely filling of rock formation cracks, stabilization of rock formation structure, and timely repair and reinforcement of concrete cracks in tunnels and roadways are crucial to ensure the normal operation of mining operations, high, stable, and safe production. [0003] In the prior art, cement slurry is used to fill the cracks, and the filling and reinforcement effect is not good, and it is ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G18/76C08G18/48C08K5/521C08L75/08C09K8/42
Inventor 于鹏程郑广朋董建国王振波杜辉
Owner SHANGHAI DONGDA CHEM
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