CN107446680A - The preparation method of shield seal grease - Google Patents

The preparation method of shield seal grease Download PDF

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Publication number
CN107446680A
CN107446680A CN201710751298.3A CN201710751298A CN107446680A CN 107446680 A CN107446680 A CN 107446680A CN 201710751298 A CN201710751298 A CN 201710751298A CN 107446680 A CN107446680 A CN 107446680A
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CN
China
Prior art keywords
parts
seal grease
stirring
preparation
synthetic fibers
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201710751298.3A
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Chinese (zh)
Inventor
李淳
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Anhui Wanke New Technological Development Co Ltd
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Anhui Wanke New Technological Development Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Priority to CN201710751298.3A priority Critical patent/CN107446680A/en
Publication of CN107446680A publication Critical patent/CN107446680A/en
Pending legal-status Critical Current

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Classifications

    • 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
    • C10M169/06—Mixtures of thickeners and additives
    • 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
    • C10M2201/14—Inorganic compounds or elements as ingredients in lubricant compositions inorganic compounds surface treated with organic compounds
    • C10M2201/145—Inorganic compounds or elements as ingredients in lubricant compositions inorganic compounds surface treated with organic compounds used as thickening agents
    • 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
    • C10M2207/02—Hydroxy compounds
    • C10M2207/023—Hydroxy compounds having hydroxy groups bound to carbon atoms of six-membered aromatic rings
    • C10M2207/026—Hydroxy compounds having hydroxy groups bound to carbon atoms of six-membered aromatic rings with tertiary alkyl groups
    • 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
    • C10M2207/04—Ethers; Acetals; Ortho-esters; Ortho-carbonates
    • C10M2207/046—Hydroxy ethers
    • 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
    • C10M2207/12—Carboxylix acids; Neutral salts thereof having carboxyl groups bound to acyclic or cycloaliphatic carbon atoms
    • C10M2207/125—Carboxylix acids; Neutral salts thereof having carboxyl groups bound to acyclic or cycloaliphatic carbon atoms having hydrocarbon chains of eight up to twenty-nine carbon atoms, i.e. fatty acids
    • C10M2207/126—Carboxylix acids; Neutral salts thereof having carboxyl groups bound to acyclic or cycloaliphatic carbon atoms having hydrocarbon chains of eight up to twenty-nine carbon atoms, i.e. fatty acids monocarboxylic
    • 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
    • C10M2207/12—Carboxylix acids; Neutral salts thereof having carboxyl groups bound to acyclic or cycloaliphatic carbon atoms
    • C10M2207/125—Carboxylix acids; Neutral salts thereof having carboxyl groups bound to acyclic or cycloaliphatic carbon atoms having hydrocarbon chains of eight up to twenty-nine carbon atoms, i.e. fatty acids
    • C10M2207/128—Carboxylix acids; Neutral salts thereof having carboxyl groups bound to acyclic or cycloaliphatic carbon atoms having hydrocarbon chains of eight up to twenty-nine carbon atoms, i.e. fatty acids containing hydroxy groups; Ethers thereof
    • 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
    • C10M2207/40—Fatty vegetable or animal oils
    • 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
    • C10M2207/40—Fatty vegetable or animal oils
    • C10M2207/401—Fatty vegetable or animal oils used as base material
    • 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
    • C10M2207/40—Fatty vegetable or animal oils
    • C10M2207/402—Castor oils
    • 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
    • C10M2209/00—Organic macromolecular compounds containing oxygen as ingredients in lubricant compositions
    • C10M2209/12—Polysaccharides, e.g. cellulose, biopolymers
    • C10M2209/126—Polysaccharides, e.g. cellulose, biopolymers used as thickening agents
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
    • C10N2030/00—Specified physical or chemical properties which is improved by the additive characterising the lubricating composition, e.g. multifunctional additives
    • C10N2030/26—Waterproofing or water resistance
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
    • C10N2040/00—Specified use or application for which the lubricating composition is intended
    • C10N2040/34—Lubricating-sealants
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
    • C10N2050/00—Form in which the lubricant is applied to the material being lubricated
    • C10N2050/10—Semi-solids; greasy

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Organic Chemistry (AREA)
  • Lubricants (AREA)

Abstract

The invention discloses a kind of preparation method of shield seal grease：(1) various raw materials are weighed by formula rate；(2) after successively sequentially adding base oil, antioxidant, thickener, lubricant into reactor, carry out quick stirring 10 15 minutes, after be warming up to 55 65 DEG C；Mixing speed is reduced, inserts is added and stirring at low speed is inflated into liquid；(3) after the completion of step (2), tackifier and synthetic fibers are added, continues to stir and inflate into liquid, then carries out 23 hours of stirring at low speed, until synthetic fibers are thoroughly mixed；It is of the invention that base oil, antioxidant, thickener, lubricant, inserts, tackifier and synthetic fibers are stirred by mixing in the case where low temperature is inflated by priority, acid molecule content in seal grease is reduced, improving shield seal grease, there is good pumping, water-insoluble, adhesive force, rubber seal compatibility, water resistant to wash away.

Description

The preparation method of shield seal grease
Technical field
The invention belongs to the technical field of the composition of high-molecular compound, is specifically related to a kind of shield seal grease Preparation method.
Background technology
Now with the development of domestic infrastructure, subway construction is like a raging fire, tunneling shield tunneling construction at home in Big city is in the ascendant.By tunnel construction several years ago, construction technology is greatly improved, in project planning addressing side Face, due to the needs of urban development, increasing tunnel is deepened in terms of buried depth than the tunnel of early stage, also has more and more Tunnel will be travelling through domestic big and small rivers and lakes.
For Shield Construction Method Used, the soil property run into will also become increasingly complex, soil layer moisture content compared with it is high, permeability is big In the case of, for the grease for playing tail sealing effect, it requires also corresponding and improved.
Grease production producer domestic at present is a lot, but in the prevalence of in sand soil or to pass through rivers and lakes etc. poor Easily occurs the problem of spillage and very big dosage under soil condition, if the dosage in the soil layer is usually 25kg/m (shields A diameter of 6.4m of machine or so), but 70~80kg/m perhaps can be used in sand soil.And the product of external import such as France or day Although the product quality of this import reaches a standard, the problem of cost is higher be present：Its price is generally more expensive than domestic tail seal grease of shield One times, such as French import grease is 25 yuan/kg, and Japanese import grease is 34 yuan/kg, and its dosage is also close unlike domestic shield tail It is few to seal grease amount.
The content of the invention
In view of this, it is an object of the invention to provide a kind of preparation method of shield seal grease, a kind of shield are close The preparation method of oil sealing fat by by priority by base oil, antioxidant, thickener, lubricant, inserts, tackifier and conjunction Mixing is stirred in the case where low temperature is inflated into fiber, acid molecule content in seal grease is reduced, improves shield Seal Oil There is fat good pumping, water-insoluble, adhesive force, rubber seal compatibility, water resistant to wash away.
In order to achieve the above object, the invention provides a kind of preparation method of shield seal grease, the shield sealing Grease its composition parts by weight be：
Base oil 350-500 parts,
Thickener 15-26 parts,
Inserts 45-55 parts,
Lubricant 3-5 parts,
Tackifier 10-15 parts,
Antioxidant 4-6 parts,
Synthetic fibers 10-12 parts
Composition described above ingredient manufacturing process is as follows：
(1) various raw materials are weighed by formula rate；
(2) after successively sequentially adding base oil, antioxidant, thickener, lubricant into the reactor of closing, carry out fast Speed stirring 10-15 minutes, stirring proceed by after 5 minutes and are warming up to 55-65 DEG C；After the completion of quick stirring, start reduction and stir Speed is mixed, while adds inserts into the reactor of closing and is inflated into liquid, it is 4-6 small finally to carry out stirring at low speed When；
(3) after the completion of step (2), stop heating, add tackifier and synthetic fibers, continue stirring and into liquid Inflation, 2-3 hour of stirring at low speed is then carried out, until synthetic fibers are thoroughly mixed, finished product is obtained by 20 μm of filter element filtering.
Further, in step (2), stirring at low speed speed is arranged to 200~300r/min；High speed rotating speed is arranged to 600 ~800r/min.
Further, described base oil is rapeseed oil, castor oil vegetable oil for industry purpose or one kind or more in hydrogenated vegetable oil The mixture of kind.
Further, described thickener is the one or more in organobentonite or methylcellulose or ethyl cellulose Mixture.
Further, described composite fibre materials are that the strings such as haircuts long fibre, bamboo fibre, wood-fibred or synthesis are fine One or more mixtures in dimension.
Further, described lubricant is No. 3 lithium saponifies, aluminium base fat, tallow, oleic acid and their a variety of mixtures.
Further, described antioxidant be butyl anisole, tert-butylhydroquinone, one kind in inorganic acid salt or A variety of mixtures.
The beneficial effects of the present invention are：
A kind of preparation method of shield seal grease of the present invention is by priority by base oil, antioxidant, thickener, lubrication Agent, inserts, tackifier and synthetic fibers are stirred mixing in the case where low temperature is inflated, and reduce acid molecule in seal grease Content, improving shield seal grease has good pumping, water-insoluble, adhesive force, rubber seal compatibility, water resistant punching Brush.
Embodiment
Embodiment one
The invention provides a kind of preparation method of shield seal grease, its step are as follows：
(1) various raw materials are weighed by formula rate：350 parts of base oil；15 parts of thickener；45 parts of inserts；Lubricant 5 Part；15 parts of tackifier；5 parts of antioxidant；12 parts of synthetic fibers；
(2) after successively sequentially adding base oil, antioxidant, thickener, lubricant into the reactor of closing, stirring Device mixing speed is to be stirred 10 minutes under 600r/min, and stirring proceeds by after 5 minutes and is warming up to 60 DEG C；Quickly stirring Cheng Hou, start to reduce mixing speed, while add inserts into the reactor of closing and inflated into liquid, finally carry out 4 hours of 200r/min stirring at low speed；
(3) after the completion of step (2), stop heating, add tackifier and synthetic fibers, continue stirring and into liquid Inflation, 2 hours of 200r/min stirring at low speed are then carried out, until synthetic fibers are thoroughly mixed, pass through 20 μm of filter element filtering Obtain finished product.
Embodiment two
The invention provides a kind of preparation method of shield seal grease, its step are as follows：
(1) various raw materials are weighed by formula rate：500 parts of base oil；26 parts of thickener；55 parts of inserts；Lubricant 3 Part；10 parts of tackifier；4 parts of antioxidant；10 parts of synthetic fibers；
(2) after successively sequentially adding base oil, antioxidant, thickener, lubricant into the reactor of closing, stirring Device mixing speed is to be stirred 15 minutes under 800r/min, and stirring proceeds by after 5 minutes and is warming up to 65 DEG C；Quickly stirring Cheng Hou, start to reduce mixing speed, while add inserts into the reactor of closing and inflated into liquid, finally carry out 6 hours of 300r/min stirring at low speed；
(3) after the completion of step (2), stop heating, add tackifier and synthetic fibers, continue stirring and into liquid Inflation, 3 hours of 300r/min stirring at low speed are then carried out, until synthetic fibers are thoroughly mixed, pass through 20 μm of filter element filtering Obtain finished product；
Embodiment three,
The invention provides a kind of preparation method of shield seal grease, its step are as follows：
(1) various raw materials are weighed by formula rate：400 parts of base oil；20 parts of thickener；50 parts of inserts；Lubricant 4 Part；12 parts of tackifier；6 parts of antioxidant；12 parts of synthetic fibers；
(2) after successively sequentially adding base oil, antioxidant, thickener, lubricant into the reactor of closing, stirring Device mixing speed is to be stirred 15 minutes under 700r/min, and stirring proceeds by after 5 minutes and is warming up to 60 DEG C；Quickly stirring Cheng Hou, start to reduce mixing speed, while add inserts into the reactor of closing and inflated into liquid, finally carry out 5 hours of 250r/min stirring at low speed；
(3) after the completion of step (2), stop heating, add tackifier and synthetic fibers, continue stirring and into liquid Inflation, 2.5 hours of 250r/min stirring at low speed are then carried out, until synthetic fibers are thoroughly mixed, pass through 20 μm of filter core mistake Filter to obtain finished product；
Further, preferable described base oil is one in rapeseed oil, castor oil vegetable oil for industry purpose or hydrogenated vegetable oil Kind or a variety of mixtures.
Further, preferable described thickener is one kind in organobentonite or methylcellulose or ethyl cellulose Or a variety of mixture.
Further, preferable described composite fibre materials for strings such as haircuts long fibre, bamboo fibre, wood-fibreds or One or more mixtures in synthetic fibers.
Further, preferable described lubricant is that No. 3 lithium saponifies, aluminium base fat, tallow, oleic acid and a variety of of theirs mix Compound.
Further, preferable described antioxidant is butyl anisole, in tert-butylhydroquinone, inorganic acid salt One or more mixtures.
The difference of the order of formula, mixing time and warm temperature is added in the present embodiment, causes the difference of product quality The opposite sex is very big, particularly oxidation reaction and synthetic reaction, and differentiation will be very big, and its result also differs.
Finally illustrate, preferred embodiment above is merely illustrative of the technical solution of the present invention and unrestricted, although logical Cross above preferred embodiment the present invention is described in detail, it is to be understood by those skilled in the art that can be Various changes are made to it in form and in details, without departing from claims of the present invention limited range.

Claims (7)

  1. A kind of 1. preparation method of shield seal grease, it is characterised in that：The shield seal grease its composition parts by weight be：
    Base oil 350-500 parts,
    Thickener 15-26 parts,
    Inserts 45-55 parts,
    Lubricant 3-5 parts,
    Tackifier 10-15 parts,
    Antioxidant 4-6 parts,
    Synthetic fibers 10-12 parts；
    Composition described above ingredient manufacturing process is as follows：
    (1) various raw materials are weighed by formula rate；
    (2) after successively sequentially adding base oil, antioxidant, thickener, lubricant into the reactor of closing, quickly stirred Mix 10-15 minutes, stirring proceeds by after 5 minutes and is warming up to 55-65 DEG C；After the completion of quick stirring, start to reduce stirring speed Degree, while add inserts into the reactor of closing and inflated into liquid, finally carry out 4-6 hour of stirring at low speed；
    (3) after the completion of step (2), stop heating, add tackifier and synthetic fibers, continue to stir and fill into liquid Gas, 2-3 hour of stirring at low speed is then carried out, until synthetic fibers are thoroughly mixed, finished product is obtained by 20 μm of filter element filtering.
  2. A kind of 2. preparation method of shield seal grease according to claim 1, it is characterised in that：It is low in step (2) Fast mixing speed is arranged to 200~300r/min；High speed rotating speed is arranged to 600~800r/min.
  3. A kind of 3. preparation method of shield seal grease according to claim 1, it is characterised in that：Described base oil is One or more mixtures in rapeseed oil, castor oil vegetable oil for industry purpose or hydrogenated vegetable oil.
  4. 4. the preparation method of shield seal grease according to claim 1, it is characterised in that：Described thickener is organic One or more mixtures in bentonite or methylcellulose or ethyl cellulose.
  5. 5. the preparation method of shield seal grease according to claim 1, it is characterised in that：Described composite fibre materials For one or more mixtures in the strings such as haircuts long fibre, bamboo fibre, wood-fibred or synthetic fibers.
  6. 6. the preparation method of shield seal grease according to claim 1, it is characterised in that：Described lubricant is No. 3 Lithium saponify, aluminium base fat, tallow, oleic acid and their a variety of mixtures.
  7. 7. the preparation method of shield seal grease according to claim 1, it is characterised in that：Described antioxidant is fourth One or more mixtures in BHA, tert-butylhydroquinone, inorganic acid salt.
CN201710751298.3A 2017-08-28 2017-08-28 The preparation method of shield seal grease Pending CN107446680A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201710751298.3A CN107446680A (en) 2017-08-28 2017-08-28 The preparation method of shield seal grease

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201710751298.3A CN107446680A (en) 2017-08-28 2017-08-28 The preparation method of shield seal grease

Publications (1)

Publication Number Publication Date
CN107446680A true CN107446680A (en) 2017-12-08

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CN201710751298.3A Pending CN107446680A (en) 2017-08-28 2017-08-28 The preparation method of shield seal grease

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114075471A (en) * 2020-08-17 2022-02-22 北京奥力助兴石化有限公司 Tooth-shaped coupling leak-proof lubricating grease and preparation method thereof

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102757839A (en) * 2011-04-29 2012-10-31 上海茨夫新型建筑材料有限公司 Degradable type shield tail sealing grease of shield excavation machine
CN105368540A (en) * 2014-08-06 2016-03-02 上海茨夫新型建筑材料有限公司 Shield machine cutterhead main shaft sealing grease

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102757839A (en) * 2011-04-29 2012-10-31 上海茨夫新型建筑材料有限公司 Degradable type shield tail sealing grease of shield excavation machine
CN105368540A (en) * 2014-08-06 2016-03-02 上海茨夫新型建筑材料有限公司 Shield machine cutterhead main shaft sealing grease

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114075471A (en) * 2020-08-17 2022-02-22 北京奥力助兴石化有限公司 Tooth-shaped coupling leak-proof lubricating grease and preparation method thereof

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Application publication date: 20171208