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Flame-retardant hand-coating type shield tail sealing grease and preparation method thereof

A technology of shield tail sealing and flame retardancy, which is applied in the petroleum industry, lubricating compositions, etc., can solve problems such as fire on the construction site and affect the safety of construction personnel, and achieve the goals of avoiding fire, ensuring safety, and high water pressure resistance. Effect

Active Publication Date: 2021-10-29
CHINA RAILWAY FIFTH SURVEY & DESIGN INST GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the hand-applied shield tail seal grease used in the market is flammable. After the shield tail brush is applied, the construction personnel often carry out a lot of welding work. If not careful, the welding slag will fall into the hand-applied shield tail seal grease. It is very easy to cause fire on the construction site, and then the entire shield tail brush forms a "fire ring", which seriously affects the safety of construction personnel

Method used

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  • Flame-retardant hand-coating type shield tail sealing grease and preparation method thereof
  • Flame-retardant hand-coating type shield tail sealing grease and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] This embodiment provides a hand-applied shield tail sealing grease. This hand-applied shield tail seal grease formula consists of chlorinated paraffin, polyisobutylene, lithium ester, PET synthetic fiber, asbestos fiber, barium sulfate, light calcium carbonate, aluminum hydroxide and magnesium hydroxide. 21kg of paraffin wax, 16kg of polyisobutylene, 11kg of lithium ester, 3.5kg of PET synthetic fiber, 2.5kg of asbestos fiber, 12kg of barium sulfate, 8kg of magnesium hydroxide, 6kg of aluminum hydroxide, and 20kg of light calcium carbonate.

[0036] During preparation, add 21kg of chlorinated paraffin and 16kg of polyisobutylene into the mixing tank successively, set the temperature of the mixing tank at 70-90°C, and stir for 30 minutes to obtain a mixed solution; pump the mixed solution into a kneader, set the kneader Temperature 60~100℃, then add 3.5kg PET synthetic fiber, 2.5kg asbestos fiber, after stirring for 5 minutes, continue to add 20kg light calcium carbonate...

Embodiment 2

[0038] This embodiment provides a hand-applied shield tail sealing grease. This hand-applied shield tail seal grease formula consists of chlorinated paraffin, polyisobutylene, lithium ester, PET synthetic fiber, asbestos fiber, barium sulfate, light calcium carbonate, aluminum hydroxide and magnesium hydroxide. 20.5kg of paraffin wax, 15kg of polyisobutylene, 15kg of lithium ester, 3.5kg of PET synthetic fiber, 2kg of asbestos fiber, 10kg of barium sulfate, 5kg of magnesium hydroxide, 5kg of aluminum hydroxide, and 24kg of light calcium carbonate.

[0039] During preparation, add 20.5kg of chlorinated paraffin and 15kg of polyisobutylene into the mixing tank successively, set the temperature of the mixing tank at 70-90°C, and stir for 30 minutes to obtain the mixed liquid; pump the mixed liquid into the kneader, set the kneading Machine temperature is 60~100℃, then add 3.5kg PET synthetic fiber, 2kg asbestos fiber, after stirring for 5 minutes, continue to add 24kg light calci...

Embodiment 3

[0041] This embodiment provides a hand-applied shield tail sealing grease. This hand-applied shield tail seal grease formula consists of chlorinated paraffin, polyisobutylene, lithium ester, PET synthetic fiber, asbestos fiber, barium sulfate, light calcium carbonate, aluminum hydroxide and magnesium hydroxide. 19kg of paraffin wax, 13kg of polyisobutylene, 16kg of lithium ester, 3.5kg of PET synthetic fiber, 2.5kg of asbestos fiber, 10kg of barium sulfate, 5kg of magnesium hydroxide, 5kg of aluminum hydroxide, and 26kg of light calcium carbonate.

[0042]During preparation, add 19kg of chlorinated paraffin and 13kg of polyisobutylene successively into the mixing tank, set the temperature of the mixing tank at 70-90°C, and stir for 30 minutes to obtain the mixed solution; pump the mixed solution into the kneader, set the kneader Temperature 60~100℃, then add 3.5kg PET synthetic fiber, 2.5kg asbestos fiber, after stirring for 5 minutes, continue to add 26kg light calcium carbon...

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Abstract

The invention relates to the technical field of shield tunneling machine sealing grease, and particularly discloses flame-retardant hand coating type shield tail sealing grease. The flame-retardant hand coating type shield tail sealing grease is prepared from the following components in parts by weight: 15 to 30 parts of chlorinated paraffin, 5 to 20 parts of polyisobutene, 8 to 22 parts of lithium ester, 2 to 6 parts of PET synthetic fiber, 1 to 3 parts of asbestos fiber, 10 to 15 parts of barium sulfate, 5 to 10 parts of magnesium hydroxide, 5 to 10 parts of aluminum hydroxide and 20 to 30 parts of light calcium carbonate. By adjusting and optimizing the formula, the prepared hand coating type shield tail sealing grease product has high flame retardance and can be extinguished away from fire, and fire disasters possibly caused by welding slag in the welding process during shield launching are avoided. The maximum water breakdown pressure of the hand coating type shield tail sealing grease product can reach 7 MPa, the hand coating type shield tail sealing grease product has high water pressure resistant sealing performance, and shield construction safety is guaranteed.

Description

technical field [0001] The invention relates to the technical field of shield machine sealing grease, in particular to a flame-retardant hand-applied shield tail sealing grease. Background technique [0002] Before the start of the shield machine, the construction personnel apply the hand-applied shield tail sealing grease to the inside and surface of the shield tail wire brush, so that the hand-applied shield tail sealing grease and the wire brush are fully bonded, providing a good seal for the shield tail during shield construction. Seal the first line of protection. [0003] At present, the hand-applied shield tail seal grease used in the market is flammable. After the shield tail brush is applied, the construction personnel often carry out a lot of welding work. If not careful, the welding slag will fall into the hand-applied shield tail seal grease. It is very easy to cause the construction site to catch fire, and then the entire shield tail brush forms a "ring of fire...

Claims

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Application Information

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IPC IPC(8): C10M169/04
CPCC10M169/048C10M2211/08C10M2205/026C10M2207/1415C10M2207/1443C10M2201/062C10M2201/084C10M2201/08C10M2209/102C10N2030/36
Inventor 王德乾谢宇飞王明杰斯芳芳孙世豪周光忠王浩胡莲周衍领
Owner CHINA RAILWAY FIFTH SURVEY & DESIGN INST GRP
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