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Spraying and wind leaking stoppage polyurethane combined polyether for coal mine as well as preparation and use methods thereof

A technology combining polyether and plugging air, applied in mining equipment, shaft equipment, earth-moving drilling, etc., can solve the problems of micro-toxic, strong irritating odor, bulky protective equipment, etc., and achieve high and low surface resistance of foam. GWP, the effect of reducing dosage

Inactive Publication Date: 2012-07-18
SHANGHAI DONGDA POLYURETHANE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But the disadvantage is that during the construction process, personnel must wear heavy protective equipment, and the workplace needs to be well ventilated. During the spraying process, there is slight toxicity and a strong pungent smell. After the spraying, at least 8 hours before entering

Method used

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  • Spraying and wind leaking stoppage polyurethane combined polyether for coal mine as well as preparation and use methods thereof
  • Spraying and wind leaking stoppage polyurethane combined polyether for coal mine as well as preparation and use methods thereof
  • Spraying and wind leaking stoppage polyurethane combined polyether for coal mine as well as preparation and use methods thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Preparation of spray-type combined polyether: Firstly, HFC-365mfc and HFC-245fa are airtightly transported to the foaming agent premixing tank according to the mass ratio of 3:7, and circulated by a circulating pump to form a uniform and stable liquid, which is used as a mixed foaming agent . According to the proportions in Table 1, the raw materials were put into the reaction kettle, and stirred at room temperature for 1 hour to obtain the combined polyether.

[0023] Table 1

[0024] YD-401P

Embodiment 2

[0026] Preparation of spray-coating combined polyether: First, HFC-365mfc and HFC-245fa are airtightly transported to the foaming agent premixing tank according to the mass ratio of 5:5, and circulated by a circulating pump to form a uniform and stable liquid, which is used as a mixed foaming agent . According to the proportions in Table 2, the raw materials were put into the reaction kettle, and stirred at room temperature for 1 hour to obtain the combined polyether.

[0027] Table 2

[0028] YD-401P

Embodiment 3

[0030] Preparation of spray-coating combined polyether: First, HFC-365mfc and HFC-245fa are airtightly transported to the foaming agent premixing tank according to the mass ratio of 7:3, and circulated and mixed by a circulating pump to form a uniform and stable liquid, which is used as a mixed foaming agent . According to the proportions in Table 3, the raw materials were put into the reaction kettle, and stirred at room temperature for 1 hour to obtain the composite polyether.

[0031] table 3

[0032] YD-401P

30

CF-6255

50

NT-403

20

LK221

0.0

LK443

2.5

h 2 o

1.3

PT303

3.0

PT304

5.0

PT306

2.0

TEP

17.5

DEEP

17.5

HFC-365mfc / HFC-245fa

40

LQ-01

5

[0033] Polyurethane foam prepared from the sprayed polyurethane combination polyether obtained in the above examples: the combination polyether obtained in...

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Abstract

The invention belongs to the field of chemical synthesis and in particular relates to a spraying and wind leaking stoppage polyurethane combined polyether for a coal mine as well as preparation and use methods thereof. According to the invention, the polyether is prepared through formulation regulation by using HCFC (hydrochlorofluorocarbon)-365mfa and / or HCFC-245fa as foaming agents, is free of fluorine and is environment-friendly; because the boiling point of HCFC-245fa is low, prepared foam is good in size stability; a reaction type amine catalyst with low VOC (volatile organic compound) and low smell is applied, thus the problem of irritative smell is solved; and the foam prepared by using a fire retardant is good in fire retardant property, and an antistatic agent is added so as to improve the problem of high resistance on the surface of polyurethane foam.

Description

technical field [0001] The invention belongs to the field of chemical synthesis, and in particular relates to a spray-coated leak-stopping polyurethane combined polyether for coal mines and its preparation and use methods. Background technique [0002] With the reform of coal mining technology, the application of coal pillar-free technologies such as gob-side retaining and gob-side conveying has greatly increased the rate of air leakage in coal roadways, which has brought great difficulties to the management of spontaneously combusted coal seams. very important. At present, some commonly used spraying plugging measures include cement mortar, yellow mud and other spraying technologies, which have certain applications in different mining areas. However, they all have the disadvantages of high labor intensity, large volume of spraying equipment, large amount of materials used, low spraying efficiency, poor material viscosity, high rebound rate, and easy cracking or peeling aft...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/50C08G18/42C08G18/16C08J9/14C08L75/08C08L75/06E21D11/00
Inventor 李心强倪军董建国许凤华曹小伟
Owner SHANGHAI DONGDA POLYURETHANE
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