Low-wear environment-friendly shield tail sealing grease and preparation method thereof

An environment-friendly, shield tail sealing technology, applied in the petroleum industry, lubricating compositions, etc., can solve the problems of uneven varieties, high wear, unfavorable performance optimization, etc., and achieve the effect of good pumpability and low wear

Inactive Publication Date: 2017-08-25
苏州瀚固新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the cost of shield tail seal greases on the market is generally high, and the existing shield tail seal greases are of different varieties, especially in terms of pressure resistance, pumpability and environmental performance, it is difficult to truly meet the needs of industrial applications.
This is mainly because most of the existing sealing greases use artificial synthetic additives such as synthetic fibers. These artificial additives are not conducive to optimizing product performance and are difficult to be biodegraded, causing environmental burdens during use.
[0003] However, the natural degradable fibers currently used as sealing materials are mostly derived from fibers extracted from trees or cotton, which are relatively expensive, and pure plant fibers do not have lubricating effects and high wear, which is not conducive to product performance optimization.

Method used

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  • Low-wear environment-friendly shield tail sealing grease and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] A shield tail sealing grease, its components and mass percentages are as follows:

[0017] 25% soybean oil, 23% mica powder, 8.9% sepiolite fiber, 5.3% graphene, 17.8% castor oil, 6% rosin, 3% acetone, etc., 2% octadecylamine polyoxyethylene ether, 9 polyacryl alcohol %.

[0018] The preparation method is as follows: 25% soybean oil, 8.9% sepiolite fiber, 5.3% graphene, and 17.8% castor oil are mixed into a reaction kettle, and heated to above 100°C until the mixture is uniform. Add 3% acetone to the mixture, and stir at constant temperature until the mixture is uniform. Then add 6% rosin, 9% polypropylene alcohol, and 2% octadecylamine polyoxyethylene ether to raise the temperature to 140°C, then add 23% mica powder, keep warm and continue stirring at low speed for 2 to 3 hours.

Embodiment 2

[0020] A shield tail sealing grease, its components and mass percentages are as follows:

[0021] 22% peanut oil, 13% dioctyl terephthalate, 24% bentonite, 24% asbestos fiber, 6% polyacrylamide, 7% coumarone resin, 2% propylene carbonate, 2 stearylamine polyoxyethylene ether %.

[0022] The preparation method is as follows: mix 22% of peanut oil, 13% of dioctyl terephthalate, and 24% of asbestos fiber into a reaction kettle, and heat to above 100°C until the mixture is uniform. Add polyacrylamide 6% into the mixture, and stir at constant temperature until the mixture is uniform. Then add coumarone resin, 2% propylene carbonate, and 2% octadecylamine polyoxyethylene ether to raise the temperature to 140°C, then add 24% bentonite, keep warm and continue stirring at low speed for 2 to 3 hours.

[0023] The product quality of the embodiment of the present invention 1 and embodiment 2 is as follows:

[0024]

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PUM

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Abstract

The invention discloses low-wear environment-friendly shield tail sealing grease and a preparation method thereof. The shield tail sealing grease is mainly prepared from 10-15% of base oil, 15-35% of powder filler, 7-15% of thickener, 3-10% of tackifier, 1-5% of second dispersant, 10-30% of water-resistant sealing material, 2-8% of anti-static material, 0.2-2% of preservative and 1-5% of toner. The prepared shield tail sealing grease is applied to shield tail sealing of shield machines in tunnel engineering. The shield tail sealing grease has the advantages of low wear, excellent pumping performance, good compression resistance sealing performance, strong adhesion, good lubricity, oxidation resistance, environmental friendliness, simple preparation technology and the like.

Description

technical field [0001] The invention relates to a novel shield tail sealing grease, in particular to a formula of low-wear and environment-friendly shield sealing grease for a shield machine and a preparation method thereof. Background technique [0002] In the past 20 years, urban rail transit and tunnel engineering have developed vigorously. In order to adapt to the development of urban rail transit, the shield tunneling method is the main method used in densely populated underground projects, and the main construction equipment is the shield tunneling machine. During the tunneling process of the shield machine, due to the relative sliding between the shield tail and the installed segment, and the gap between the outer wall of the segment and the shield tail, the lubrication and sealing effect of the shield tail sealing grease can effectively protect the shield tail And isolate the mud, prevent the seepage of muddy water and grout, and ensure the smooth advancement of the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10M169/04C10M177/00C10N30/06C10N40/34
CPCC10M169/044C10M169/048C10M177/00C10M2201/041C10M2201/102C10M2201/103C10M2205/028C10M2205/20C10M2207/08C10M2207/285C10M2207/401C10M2207/402C10M2209/105C10M2217/024C10M2217/06C10N2030/06C10N2030/26C10N2040/34
Inventor 邢明阳杭一凡
Owner 苏州瀚固新材料科技有限公司
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