Eco-friendly shield tail sealing grease as well as preparation method and application thereof

A technology of sealing grease and shield tail seal, applied in the direction of lubricating composition, etc., can solve the problems of biodegradability to be further improved, poor biodegradability, unable to meet environmental protection, etc., to achieve good consistency and pumpability, adhesion Excellent performance, good water pressure resistance and sealing effect

Active Publication Date: 2022-03-01
北京中铁新材料技术有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] CN112159698A discloses a kind of environment-friendly type shield tail sealing grease, its formula component comprises base oil, filler, lubricant, tackifier, adhesion improver, reinforcing agent, microcapsule, and the sealing grease and base in this patent application It has a good interaction with the surface of materials, but since the base oil, lubricant and tackifier are all from fossil raw materials, the biodegradability is poor and it is not friendly to the environment
The base oil in this patent application is biodegradable using one or more of tallow, soybean oil, and rapeseed oil, but its tackifier is still derived from fossil raw materials, and some fibers also use Polypropylene fiber, the biodegradability of the entire formulation system needs to be further improved, and still cannot meet the requirements of environmental protection

Method used

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  • Eco-friendly shield tail sealing grease as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] This embodiment provides an eco-friendly shield tail sealing grease and a preparation method thereof.

[0048] The sealing grease consists of 32kg epoxy soybean oil, 5kg polyisobutylene, 5kg guar gum, 3kg organic montmorillonite, 2kg vinyl tris (β-methoxyethoxy) silane, 3.5kg cellulose fiber, 3.4kg cotton fiber, Composition of straw powder 10kg, calcium carbonate 36kg, OBPA antifungal agent 0.1kg.

[0049] The preparation method is as follows:

[0050] (1) Epoxidized soybean oil, polyisobutylene and guar gum were mixed and stirred for 30min at a temperature of 80°C;

[0051] (2) Mix the mixture obtained in step (1) with organic montmorillonite in a kneader for 5 minutes at 70°C, then add vinyl tris(β-methoxyethoxy)silane, straw powder, carbonic acid Calcium and OBPA antifungal agent continue to stir for 5 minutes, and finally add cellulose fiber and cotton fiber and continue to mix and stir for 75 minutes;

[0052] (3) Pass the mixture obtained in step (2) through a ...

Embodiment 2-5

[0054] This embodiment provides an eco-friendly shield tail sealing grease and a preparation method thereof.

[0055] The only difference with Example 1 is that in this example, the amount of organic montmorillonite added is 2.5kg (Example 2), 2kg (Example 3), 1kg (Example 4), 5kg (Example 5 ).

Embodiment 6-9

[0057] This embodiment provides an eco-friendly shield tail sealing grease and a preparation method thereof.

[0058] The only difference with Example 1 is that in this example, epoxidized soybean oil is replaced by rapeseed oil (Example 6), palm oil (Example 7), industrial soybean oil (Example 8), chicken oil (Example 9).

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Abstract

The invention relates to eco-friendly shield tail sealing grease as well as a preparation method and application thereof, and the sealing grease comprises the following components in parts by weight: 15-40 parts of base oil, 5-20 parts of a tackifier, 1-5 parts of a thickening rheological agent, 1-5 parts of an adhesion improver, 3-8 parts of a reinforcing agent and 30-50 parts of a filler. The sealing grease provided by the invention is good in water pressure resistance and sealing performance, excellent in pumpability and strong in adhesion; meanwhile, most of the components are natural, non-toxic, renewable and biodegradable, pollution of shield tail sealing grease to underground water, the environment and structures can be avoided, and continuous improvement of the ecological environment is promoted.

Description

technical field [0001] The disclosure relates to the technical field of construction materials for tunnels and underground engineering, in particular to an eco-friendly shield tail sealing grease and its preparation method and application. Background technique [0002] The shield machine is the most commonly used equipment for shield construction in urban rail transit. The shield tail seal grease is the most important part of the shield machine tail system, and its ability to resist water pressure seals determines the upper limit of the shield tail seal. Especially when the shield machine encounters high water pressure, high formation permeability coefficient and extremely complex geological conditions, it is easy to cause the shield tail seal to fail. The structures on the ground collapsed, and the construction risk was extremely high. Therefore, the construction unit has high requirements on the comprehensive performance of shield tail sealing grease, which requires excel...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10M169/04
CPCC10M169/048C10M2207/401C10M2207/402C10M2201/105C10M2201/103C10M2209/12C10M2201/084C10M2201/08C10M2207/023C10M2227/083C10M2227/04
Inventor 王德乾王立新斯芳芳黄超谌启发孙世豪李博谢宇飞王明杰汤冕严振林沈锐锁丽丽吴兴光
Owner 北京中铁新材料技术有限公司
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