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A kind of wide temperature range urea-based shield tail sealing grease and preparation method thereof

A shield tail sealing and wide temperature range technology is applied in the field of shield tail sealing grease and its preparation of urea-based shield machine with a wide temperature range, which can solve the impact of tunnel construction engineering construction, propulsion efficiency shield tail sealing grease research and development cost and quality control. , The shield tail sealing grease is greatly affected by temperature factors, and the shield tail sealing grease becomes thinner, etc., to achieve the effect of good water pressure resistance, wide application range and high pumpability.

Active Publication Date: 2022-07-22
BEIJING MUNICIPAL CONSTR +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, most shield tail sealing greases currently on the market cannot meet the requirements of water pressure resistance, pumpability, adhesion, and corrosion resistance at the same time, and the shield tail sealing grease is greatly affected by temperature. In low temperature environments, The fluidity of the shield tail seal grease is affected by temperature, resulting in poor pumpability; under high temperature environment, the shield tail seal grease will become thinner, the fluidity will become larger, and the water resistance will be poor.
Therefore, at present, domestic shield tail sealing grease generally has two formulas in winter and summer, which has a great impact on the construction of tunnel construction projects, propulsion efficiency, and research and development costs and quality control of shield tail sealing grease.

Method used

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  • A kind of wide temperature range urea-based shield tail sealing grease and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] The components and parts by weight of the shield tail sealing grease of the shield machine in this embodiment are as follows: 10 parts of urea-based resin, 50 parts of calcium carbonate, 10 parts of calcium-based bentonite, 10 parts of gear oil B, and 5 parts of sodium-based grease , 5 parts of cellulose fiber

[0030] Preparation:

[0031] Step A: weigh 80 parts of PTMG1000, add into a three-necked flask, and slowly heat to 110~120°C under stirring;

[0032] Step B: dehydration, then cooling to 50°C, adding 32 parts of TDI, warming up to 85°C and reacting for 3h;

[0033] Step C: add 29 parts of ALT402 latent curing agent, 1 part of leveling agent, 0.5 part of defoamer, stir rapidly and discharge after vacuum defoaming for 40min to obtain a single-component polyurea resin with an NCO mass fraction of 6%.

[0034] Step D: put gear oil, cellulose fiber and sodium-based grease into the kneader, after being heated to 80~100 DEG C under stirring conditions, keep constant ...

Embodiment 2

[0038] The components and parts by weight of the shield tail sealing grease of the shield machine in this embodiment are as follows: 15 parts of urea resin, 40 parts of calcium carbonate, 10 parts of sodium bentonite, 10 parts of 150SN mineral oil, 5 parts of sodium base grease parts, 5 parts cellulose fiber

[0039] Preparation:

[0040] Step A: weigh 80 parts of PTMG1000, add into a three-necked flask, and slowly heat to 110~120°C under stirring;

[0041] Step B: dehydration, then cooling to 50 ° C, adding 40 parts of HMDI, warming up to 85 ° C and reacting for 3h;

[0042] Step C: add 26 parts of ALT402 latent curing agent, 1 part of leveling agent, 0.5 part of defoamer, stir rapidly and discharge after vacuum defoaming for 40min, to obtain NCO mass fraction of 6% single-component polyurea resin.

[0043] Step D: put 150SN mineral oil, cellulose fiber, and sodium-based grease into the kneader, after being heated to 80~100 ℃ under stirring conditions, keep constant tempera...

Embodiment 3

[0047] The components and parts by weight of the shield tail sealing grease of the shield machine in this embodiment are as follows: 20 parts of urea-based resin, 40 parts of calcium carbonate, 10 parts of sodium bentonite, 10 parts of ester synthetic oil, and lithium-based grease 5 parts, 5 parts wood fiber

[0048] Preparation:

[0049] Step A: weigh 80 parts of PTMG1000, add into a three-necked flask, and slowly heat to 110~120°C under stirring;

[0050] Step B: dehydration, then cooling to 50 ° C, adding 42 parts of IPDI, warming up to 85 ° C and reacting for 3h;

[0051] Step C: add 30 parts of latent curing agent, 1 part of leveling agent, 0.5 part of defoamer, stir rapidly and discharge after vacuum defoaming for 40min, to obtain NCO mass fraction of 6% single-component polyurea resin.

[0052]Step D: put the ester synthetic oil, wood fiber and organic grease into the kneader, after being heated to 80~100 ℃ under stirring conditions, keep constant temperature until fu...

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Abstract

The invention discloses a wide temperature range urea-based shield tail sealing grease and a preparation method thereof. The invention comprises the following components in parts by weight: 10-25 parts of base oil, 10-30 parts of urea-based resin, 5-15 parts of lubricating grease, 35-70 parts of powdery filler, and 3-5 parts of fiber. The invention has the following characteristics: (1) it is suitable for use in a wide temperature range, and the pumping capacity varies little with temperature; (2) the water pressure resistance and sealing performance are good, and when encountering water leakage and slurry leakage, the latent curing agent in the grease and the The water molecules react to form a waterproof layer membrane to achieve the effect of sealing and plugging; (3) the components are simple, the performance is stable, non-toxic and non-corrosive, and it is environmentally friendly.

Description

technical field [0001] The invention relates to a sealing grease and a preparation method thereof, in particular to a shield tail sealing grease of a urea-based shield machine with a wide temperature range and a preparation method thereof. Background technique [0002] With the rapid development of the times, in order to meet the needs of urbanization construction, tunnel construction projects have increased. At present, the shield technology is mainly used in the construction of underground tunnels and subway projects. The shield method has less impact on the surrounding environment, etc. Unique advantages and unique in the field of tunnel construction. However, in the shield construction, the shield tail seal is a key link, which can affect whether the shield machine can advance smoothly, and even affect the safety of construction. The shield tail grease is the sealing material used for the shield tail when the shield machine is tunneling. It can effectively prevent groun...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10M169/06C08G18/48C08G18/42C10N30/08
CPCC10M169/06C08G18/48C08G18/42C10M2201/062C10M2201/103C10M2209/12C10M2217/045C10M2209/102C10M2207/40C10M2205/024
Inventor 郭飞孔恒姜瑜张丽丽胡嵩张旭光李永生赵欣徐鹏飞张春发赵晨阳高胜雷田治州孙博通张亚珍王璐刘雷廷户迁迁
Owner BEIJING MUNICIPAL CONSTR
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