CN112029557A - High-performance shield tail sealing grease and preparation method thereof - Google Patents
High-performance shield tail sealing grease and preparation method thereof Download PDFInfo
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M169/00—Lubricating compositions characterised by containing as components a mixture of at least two types of ingredient selected from base-materials, thickeners or additives, covered by the preceding groups, each of these compounds being essential
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M169/00—Lubricating compositions characterised by containing as components a mixture of at least two types of ingredient selected from base-materials, thickeners or additives, covered by the preceding groups, each of these compounds being essential
- C10M169/04—Mixtures of base-materials and additives
- C10M169/044—Mixtures of base-materials and additives the additives being a mixture of non-macromolecular and macromolecular compounds
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M177/00—Special methods of preparation of lubricating compositions; Chemical modification by after-treatment of components or of the whole of a lubricating composition, not covered by other classes
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2201/00—Inorganic compounds or elements as ingredients in lubricant compositions
- C10M2201/06—Metal compounds
- C10M2201/062—Oxides; Hydroxides; Carbonates or bicarbonates
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2201/00—Inorganic compounds or elements as ingredients in lubricant compositions
- C10M2201/10—Compounds containing silicon
- C10M2201/102—Silicates
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2205/00—Organic macromolecular hydrocarbon compounds or fractions, whether or not modified by oxidation as ingredients in lubricant compositions
- C10M2205/02—Organic macromolecular hydrocarbon compounds or fractions, whether or not modified by oxidation as ingredients in lubricant compositions containing acyclic monomers
- C10M2205/022—Ethene
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2205/00—Organic macromolecular hydrocarbon compounds or fractions, whether or not modified by oxidation as ingredients in lubricant compositions
- C10M2205/02—Organic macromolecular hydrocarbon compounds or fractions, whether or not modified by oxidation as ingredients in lubricant compositions containing acyclic monomers
- C10M2205/024—Propene
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2205/00—Organic macromolecular hydrocarbon compounds or fractions, whether or not modified by oxidation as ingredients in lubricant compositions
- C10M2205/02—Organic macromolecular hydrocarbon compounds or fractions, whether or not modified by oxidation as ingredients in lubricant compositions containing acyclic monomers
- C10M2205/026—Butene
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2205/00—Organic macromolecular hydrocarbon compounds or fractions, whether or not modified by oxidation as ingredients in lubricant compositions
- C10M2205/02—Organic macromolecular hydrocarbon compounds or fractions, whether or not modified by oxidation as ingredients in lubricant compositions containing acyclic monomers
- C10M2205/028—Organic macromolecular hydrocarbon compounds or fractions, whether or not modified by oxidation as ingredients in lubricant compositions containing acyclic monomers containing aliphatic monomers having more than four carbon atoms
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2205/00—Organic macromolecular hydrocarbon compounds or fractions, whether or not modified by oxidation as ingredients in lubricant compositions
- C10M2205/10—Organic macromolecular hydrocarbon compounds or fractions, whether or not modified by oxidation as ingredients in lubricant compositions containing cycloaliphatic monomers
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2207/00—Organic non-macromolecular hydrocarbon compounds containing hydrogen, carbon and oxygen as ingredients in lubricant compositions
- C10M2207/10—Carboxylix acids; Neutral salts thereof
- C10M2207/16—Naphthenic acids
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2219/00—Organic non-macromolecular compounds containing sulfur, selenium or tellurium as ingredients in lubricant compositions
- C10M2219/04—Organic non-macromolecular compounds containing sulfur, selenium or tellurium as ingredients in lubricant compositions containing sulfur-to-oxygen bonds, i.e. sulfones, sulfoxides
- C10M2219/044—Sulfonic acids, Derivatives thereof, e.g. neutral salts
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Organic Chemistry (AREA)
- Sealing Material Composition (AREA)
- Lubricants (AREA)
Abstract
The application relates to a high-performance shield tail sealing grease and a preparation method thereof. The high-performance shield tail sealing grease lubricant provided by the invention adopts anhydrous calcium-based lubricating grease as a lubricant, adopts mineral fibers, particularly asbestos fibers, as a sealant, and adopts calcium carbonate as a filler and an antiwear agent, so that the production cost can be obviously reduced, and the high-performance shield tail sealing grease lubricant has very good sealing property, pumpability and high temperature resistance, and can meet the high requirement of excavation construction of underground tunnels such as modern urban subways on shield machine sealing grease performance.
Description
Technical Field
The application belongs to the technical field of sealing, and particularly relates to high-performance shield tail sealing grease and a preparation method thereof.
Background
At present, the underground traffic in China develops rapidly, particularly subway traffic, and a shield method is taken as a mainstream method for urban underground tunnel construction, so that the method has the advantages of high automation degree, high construction speed, safety, stability, high efficiency, small influence on environment and the like, and has strong advantages in underground construction.
When the shield machine is used for tunneling, relative sliding friction exists between the shield tail and the installed pipe pieces, in order to prevent external underground water and slurry from flowing into the shield head, a shield tail sealing device needs to be arranged between the shield tail and the installed pipe pieces, shield tail sealing grease is one of main ideal sealing materials between the shield tail and the installed pipe pieces, the shield tail can be effectively protected from isolating the underground water and the slurry, and the shield can be guaranteed to be effectively pushed forwards. Good tail sealing grease should have the advantages of good hydraulic pressure resistance, pumpability, lubricity, and also have the effects of corrosion resistance and wear reduction on the shield machine.
The requirement of shield tail sealing grease is greatly increased, the problem of how to ensure the product quality and reduce the cost is urgently needed to be solved at present. .
Chinese patent CN111394160A discloses a high-performance shield tail sealing grease and a preparation method thereof, and the components comprise 20-30 parts of vegetable oil, 15-23 parts of ethylene propylene rubber, 3-6 parts of reinforcing fiber, 0.5-1.5 parts of dispersant, 1-2 parts of bentonite, 5-10 parts of light calcium carbonate, 2-5 parts of boron nitride nanosheet/montmorillonite intercalation composite material and 1-5 parts of hollow mesoporous titanium dioxide; the method has the advantages of multiple components, complex process, high production cost by adopting bentonite as a lubricant and further improved sealing performance.
Disclosure of Invention
The high-performance shield tail sealing grease and the preparation method thereof are provided for solving the defects of high production cost, poor sealing performance, poor pumpability and the like of the shield tail sealing grease in the prior art.
The invention provides a high-performance shield tail sealing grease which comprises the following components in percentage by mass:
20-50% of lubricant, 20-40% of sealant, 2-6% of curing agent, 2-3% of preservative and 25-40% of antiwear agent.
Further preferably, the lubricant is an anhydrous calcium-based grease or a lithium-based grease, more preferably, the lubricant is an anhydrous calcium-based grease, and most preferably, the lubricant is an anhydrous calcium-based grease in an amount of 40 to 50%.
Further preferably, the sealant is wood fiber, mineral fiber; preferably, the sealing agent is asbestos fiber, or consists of asbestos fiber and high molecular polymer; preferably, the asbestos fibers have a fiber length of 1-2 mm; when the sealing agent consists of asbestos fiber and high molecular polymer, the content of the high molecular polymer is 2-3%, and the balance is the asbestos fiber, namely the content of the asbestos fiber is 17-38%.
Preferably, the high molecular polymer is ethylene propylene rubber, polyisobutylene or trackless polypropylene. The inventor finds that the adhesiveness of the tail sealing grease can be effectively increased by adding a certain high molecular polymer.
Further preferably, the curing agent is an oil-soluble petroleum resin; preferably, the curing agent is a C9 petroleum resin, 120 resin, or terpene resin, and the curing agent is present in an amount of 2-6%, most preferably 2-3%.
Further preferably, in order to ensure that the shield sealing grease can protect the shield machine from corrosion and reduce abrasion, a preservative and an anti-abrasion agent are also required to be added into the shield tail sealing grease, the preservative can be selected from barium petroleum sulfonate, zinc naphthenate and barium dinonylnaphthalene sulfonate, and the content of the preservative is 2-3%.
Further, the antiwear agent is calcium carbonate; preferably, the antiwear agent is calcium carbonate powder with a particle size of more than 1000 meshes.
In a more preferred embodiment of the invention, a high-performance shield tail sealing grease is provided, which comprises the following components in percentage by mass:
lubricants, sealants, curing agents, preservatives and antiwear agents; wherein the content of the first and second substances,
said lubricant is an anhydrous calcium-based grease or a lithium-based grease, most preferably said anhydrous calcium-based grease; the content of the lubricant is 20-50%;
the sealing agent is asbestos fiber or consists of asbestos fiber and high molecular polymer, wherein the fiber length of the asbestos fiber is most suitable to be 1-2 mm; the content of the sealant is 20-40%;
the curing agent is a polymeric resin selected from the group consisting of petroleum resins, such as C9 petroleum resin, 120 resin, and terpene resins, it being understood that these polymeric resins are oil soluble; the content of the curing agent is 2-6%, and the optimal dosage is 2-3%;
the preservative is barium petroleum sulfonate, zinc naphthenate or barium dinonyl naphthalene sulfonate; the content is 2-3%;
the antiwear agent is calcium carbonate, more preferably calcium carbonate powder with the particle size of more than 1000 meshes is used, and the content is 25-40%.
Further, in the high-performance shield tail sealing grease, the content of the sealant is 20-40%, when the sealant consists of asbestos fibers and high-molecular polymers, the content of the high-molecular polymers is 2-3%, and the balance is the asbestos fibers.
The invention also provides a preparation method of the high-performance shield tail sealing grease, which comprises the following steps:
adding a lubricant, an optional high-molecular polymer and a curing agent into a kneader, stirring and kneading for 1-2h, optionally heating to 50-70 ℃, continuously adding an antiwear agent, stirring for 1-2h, adding a preservative and a sealant, and stirring for 1-2h to obtain the high-performance shield tail sealing grease.
In another more preferred embodiment of the present invention, there is provided a method for preparing the high performance shield tail sealing grease, comprising the following steps:
adding the anhydrous calcium-based grease, the high-molecular polymer and the curing agent into a kneading machine, stirring and kneading for 1-2h, heating to 50-70 ℃, continuously adding the calcium carbonate, stirring for 1-2h, adding the preservative and the asbestos fiber, and stirring for 1-2h to obtain the high-performance shield tail sealing grease.
The contents mentioned in the invention are all mass percentages, wherein the contents of all the components are calculated by taking the total weight of the high-performance shield tail sealing grease as a reference. For example, the content of the lubricant is 20-50% of the mass of the lubricant accounting for 20-50% of the total weight of the high-performance shield tail sealing grease.
The invention has the beneficial effects that:
firstly, the anhydrous calcium-based lubricating grease adopted by the high-performance shield tail sealing grease lubricant provided by the invention is good in oxidation stability, water resistance, colloid stability, low-temperature fluidity, wear resistance and high temperature, the dropping point is more than 140 ℃, the using temperature can reach 120 ℃ at most, and compared with the bentonite lubricating grease adopted in the prior art, the high-performance shield tail sealing grease lubricant has the advantages that the production cost is greatly reduced, and the production process is simple.
Secondly, the invention adopts mineral fibers, especially asbestos fibers, as the sealant, has low cost, and the addition of high molecular polymers in the asbestos fibers as the sealant can obviously increase the adhesiveness of the shield tail sealing grease.
Thirdly, the calcium carbonate is adopted as the filler and the antiwear agent, and the calcium carbonate powder with the particle size of more than 1000 meshes is particularly used, so that the production cost can be reduced.
Fourthly, the invention obtains the high-performance shield tail sealing grease by optimizing the component composition and the using amount of the shield tail sealing grease, not only greatly reduces the production cost, but also has very good sealing property, pumpability and high temperature resistance, and can meet the high requirement of the excavation construction of underground tunnels such as modern urban subways on the shield tail sealing grease performance of the shield machine.
Drawings
The technical solution of the present application is further explained below with reference to the drawings and the embodiments.
Fig. 1 is a schematic view of a metal mesh structure of a shield tail brush metal bundle simulated by a sealing performance test performed in example 5 of the present application.
Detailed Description
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict.
Example 1 high-performance shield tail sealing grease and preparation method thereof
A high-performance shield tail sealing grease comprises the following components:
200g of anhydrous calcium-based lubricating grease,
280g of asbestos fibers,
30g of polyisobutylene,
60g of C9 petroleum resin,
30g of barium petroleum sulfonate, namely 30g of barium,
400g of calcium carbonate powder.
The preparation method comprises the following steps:
adding 200g of anhydrous calcium-based grease, 30g of polyisobutylene and 60g of C9 petroleum resin into a kneader, stirring and kneading for 1h, properly heating to 50-70 ℃, adding 400g of calcium carbonate powder with more than 1000 meshes, stirring for 1-2h, adding 30g of barium petroleum sulfonate and 280g of asbestos fibers, and stirring for 1-2h to obtain a finished product.
Example 2 high-performance shield tail sealing grease and preparation method thereof
A high-performance shield tail sealing grease comprises the following components:
500g of anhydrous calcium-based lubricating grease,
the weight of the asbestos fiber is 180g,
20g of polyisobutylene,
120 of a resin (a) and 30g of resin,
20g of zinc naphthenate, namely zinc naphthenate,
250g of calcium carbonate powder.
The preparation method comprises the following steps:
adding 500g of anhydrous calcium-based resin, 20g of polyisobutylene and 30g of 120 resin into a kneader, stirring and kneading for 1.5h, properly heating to 50-70 ℃, adding 250g of calcium carbonate powder with more than 1000 meshes, stirring for 1-2h, adding 20g of zinc naphthenate and 180g of asbestos fibers, and stirring for 1-2h to obtain a finished product.
Example 3 high-performance shield tail sealing grease and preparation method thereof
A high-performance shield tail sealing grease comprises the following components:
400g of anhydrous calcium-based lubricating grease,
the asbestos fibers are used in an amount of 210g,
25g of ethylene-propylene rubber,
40g of terpene resin is added in the resin,
25g of barium dinonyl naphthalene sulfonate,
300g of calcium carbonate powder.
The preparation method comprises the following steps:
adding 400g of anhydrous calcium-based resin, 25g of ethylene propylene rubber and 40g of terpene resin into a kneader, stirring and kneading for 1.5h, properly heating to 50-70 ℃, adding 300g of calcium carbonate powder with more than 1000 meshes, stirring for 1-2h, adding 25g of barium dinonylnaphthalene sulfonate and 210g of asbestos fiber, and stirring for 1-2h to obtain a finished product.
Example 3 high-performance shield tail sealing grease and preparation method thereof
A high-performance shield tail sealing grease comprises the following components:
300g of lithium-based grease,
300g of asbestos fiber is adopted, and the weight of the asbestos fiber,
25g of trackless polypropylene,
50g of terpene resin is added in the resin,
25g of barium dinonyl naphthalene sulfonate,
300g of calcium carbonate powder.
The preparation method comprises the following steps:
adding 300g of lithium-based resin, 25g of trackless polypropylene and 50g of terpene resin into a kneader, stirring and kneading for 2h, properly heating to 50-70 ℃, adding 300g of calcium carbonate powder with more than 1000 meshes, stirring for 1-2h, adding 25g of barium dinonylnaphthalene sulfonate and 300g of asbestos fiber, and stirring for 1-2h to obtain a finished product.
Example 4 high-performance shield tail sealing grease and preparation method thereof
A high-performance shield tail sealing grease comprises the following components:
400g of anhydrous calcium-based lubricating grease,
300g of asbestos fiber is adopted, and the weight of the asbestos fiber,
120 of a resin (20 g),
30g of zinc naphthenate, and the content of zinc naphthenate,
250g of calcium carbonate powder.
The preparation method comprises the following steps:
adding 400g of anhydrous calcium-based grease and 20g of 120 resin into a kneader, stirring and kneading for 1h, heating to 50-70 ℃ properly, adding 250g of calcium carbonate powder with more than 1000 meshes, stirring for 1-2h, adding 30g of zinc naphthenate and 300g of asbestos fibers, and stirring for 1-2h to obtain a finished product.
The high-performance shield tail sealing grease prepared by the invention is subjected to performance test, and the test result and the test method are shown in table 1.
Example 5 Performance testing and test results
The high performance shield tail sealing grease prepared in examples 1 to 4 of the present invention was subjected to the following performance tests, and the test results and test methods are shown below.
A) And (3) testing the sealing property: the test adopts a general hydrostatic test method, namely a cylindrical cylinder of metal or organic glass with the diameter of 50mm is about 100mm high, an air inlet is arranged above the cylindrical cylinder, and a layer of metal net with the aperture of 1mm or 0.5mm (the net is a simulated shield tail brush metal bundle) is attached below the cylindrical cylinder, as shown in figure 1;
in the test, a shield tail sealing grease with a thickness of 25mm is added above the metal mesh, no air bubbles are needed during filling, water with a thickness of about 50mm is added on the grease, and then 0.8MPa air pressure is applied on the water surface. And (3) measuring the time for the water to flow out from the bottom, keeping the time for 5 minutes when the diameters are 1mm and 0.5mm, ensuring that the water is not leaked, and judging that the sealing performance is qualified if the diameters are not 1mm and 0.5mm, otherwise, judging that the water is unqualified.
The products prepared in the embodiments 1 to 4 of the invention are kept for 5 minutes under the condition of 3.5MPa without water leakage, so the products have quite good water pressure resistant sealing performance.
The test results show that the products prepared by the invention have quite good water pressure resistance sealing performance.
B) Testing the pumpability: for simplicity, convenience and practicability, the inventor adopts a commercially available greasing gun, and manually operates after the shield tail sealing grease is filled in the greasing gun, so that the greasing can be easily and continuously realized, and the grease is qualified, or the grease is unqualified.
The test result shows that the product prepared by the invention can easily realize fat liquoring, so the product has good pumpability.
C) Ignition point test: a steel plate having a thickness of 5 to 8mm was placed on an electric furnace and heated, 5g of a test sample was placed on the steel plate, and the temperature of the sample during combustion was measured by an infrared thermometer. Test results show that the combustion temperature of the products prepared by the invention is higher than 300 DEG C
D) Other tests: the method is carried out according to the GB/T standard method, and the measured data are shown in the table.
The products prepared according to the invention were tested according to the method described above, the test results are shown in table 1.
TABLE 1 test methods and test results
Note that: the index in the table is the index of the qualified product; "actually measured" means the actual results of the products prepared in the examples of the present invention after the products are tested according to the method.
As can be seen from Table 1, the combustion temperature of the tail sealing grease prepared by the method provided by the invention is more than 300 ℃, and the tail sealing grease has quite good water pressure resistance and good pumpability.
In light of the foregoing description of the preferred embodiments according to the present application, it is to be understood that various changes and modifications may be made without departing from the spirit and scope of the invention. The technical scope of the present application is not limited to the contents of the specification, and must be determined according to the scope of the claims.
Claims (10)
1. The high-performance shield tail sealing grease is characterized by comprising the following components in percentage by mass:
20-50% of lubricant, 20-40% of sealant, 2-6% of curing agent, 2-3% of preservative and 25-40% of antiwear agent.
2. The high-performance shield tail sealing grease according to claim 1, wherein the lubricant is anhydrous calcium-based grease or lithium-based grease, preferably the lubricant is anhydrous calcium-based grease, and the content is 40-50%.
3. The high-performance shield tail sealing grease of claim 1, wherein the sealing agent is asbestos fiber or consists of asbestos fiber and 2-3% of high-molecular polymer.
4. The high performance shield tail sealing grease of claim 3, wherein the asbestos fibers have a fiber length of 1-2 mm.
5. The high-performance shield tail sealing grease of claim 3, wherein the high-molecular polymer is ethylene propylene rubber, polyisobutylene or trackless polypropylene.
6. The high-performance shield tail sealing grease according to claim 1, wherein the curing agent is oil-soluble petroleum resin; preferably, the curing agent is a C9 petroleum resin, a 120 resin, or a terpene resin.
7. The high-performance shield tail sealing grease of claim 1, wherein the preservative is barium petroleum sulfonate, zinc naphthenate or barium dinonylnaphthalene sulfonate.
8. The high performance shield tail seal grease of claim 1, wherein the antiwear agent is calcium carbonate; preferably, the antiwear agent is calcium carbonate powder with a particle size of more than 1000 meshes.
9. The preparation method of the high-performance shield tail sealing grease of any one of claims 1 to 8, which is characterized by comprising the following steps:
adding a lubricant, an optional high-molecular polymer and a curing agent into a kneader, stirring and kneading for 1-2h, optionally heating to 50-70 ℃, continuously adding an antiwear agent, stirring for 1-2h, adding a preservative and a sealant, and stirring for 1-2h to obtain the high-performance shield tail sealing grease.
10. The preparation method of the high-performance shield tail sealing grease of claim 9, which comprises the following steps:
adding the anhydrous calcium-based grease, the high-molecular polymer and the curing agent into a kneading machine, stirring and kneading for 1-2h, heating to 50-70 ℃, continuously adding the calcium carbonate, stirring for 1-2h, adding the preservative and the asbestos fiber, and stirring for 1-2h to obtain the high-performance shield tail sealing grease.
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| CN202010729496.1A CN112029557A (en) | 2020-07-27 | 2020-07-27 | High-performance shield tail sealing grease and preparation method thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114874825A (en) * | 2021-06-26 | 2022-08-09 | 上海鸿栩化工科技有限公司 | Production process and use method of shield tail sealing grease |
| CN115466597A (en) * | 2021-11-12 | 2022-12-13 | 虎牌石油（中国）有限公司 | Environment-friendly shield tail sealant and preparation method thereof |
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| CN111253998A (en) * | 2020-02-13 | 2020-06-09 | 上海果石实业(集团)有限公司 | Shield tail sealing grease and preparation method and application thereof |
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2020
- 2020-07-27 CN CN202010729496.1A patent/CN112029557A/en active Pending
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| CN101939398A (en) * | 2008-02-13 | 2011-01-05 | 蓝宝迪有限公司 | Tail seals |
| US20110008107A1 (en) * | 2008-02-13 | 2011-01-13 | Lamberti Spa | Tail seals |
| CN109370747A (en) * | 2018-12-24 | 2019-02-22 | 浙江安赛新材料科技有限公司 | A kind of shield machine shield tail seal grease and preparation method thereof |
| CN111253998A (en) * | 2020-02-13 | 2020-06-09 | 上海果石实业(集团)有限公司 | Shield tail sealing grease and preparation method and application thereof |
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| CN114874825A (en) * | 2021-06-26 | 2022-08-09 | 上海鸿栩化工科技有限公司 | Production process and use method of shield tail sealing grease |
| CN115466597A (en) * | 2021-11-12 | 2022-12-13 | 虎牌石油（中国）有限公司 | Environment-friendly shield tail sealant and preparation method thereof |
| CN115466597B (en) * | 2021-11-12 | 2023-11-14 | 虎牌石油（中国）有限公司 | Environment-friendly shield tail sealant and preparation method thereof |
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Application publication date: 20201204 |