CN112694939B - Hydrophilic oil special for centrifugal pumps in outdoor and humid areas and preparation method thereof - Google Patents
Hydrophilic oil special for centrifugal pumps in outdoor and humid areas and preparation method thereof Download PDFInfo
- Publication number
- CN112694939B CN112694939B CN202110074662.3A CN202110074662A CN112694939B CN 112694939 B CN112694939 B CN 112694939B CN 202110074662 A CN202110074662 A CN 202110074662A CN 112694939 B CN112694939 B CN 112694939B
- Authority
- CN
- China
- Prior art keywords
- additive
- percent
- base oil
- rust
- multifunctional
- 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.)
- Active
Links
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
- C10M169/04—Mixtures of base-materials 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
- C10M2207/00—Organic non-macromolecular hydrocarbon compounds containing hydrogen, carbon and oxygen as ingredients in lubricant compositions
- C10M2207/02—Hydroxy compounds
- C10M2207/021—Hydroxy compounds having hydroxy groups bound to acyclic or cycloaliphatic carbon atoms
- C10M2207/022—Hydroxy compounds having hydroxy groups bound to acyclic or cycloaliphatic carbon atoms containing at least two hydroxy groups
- C10M2207/0225—Hydroxy compounds having hydroxy groups bound to acyclic or cycloaliphatic carbon atoms containing at least two hydroxy groups 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
- C10M2207/04—Ethers; Acetals; Ortho-esters; Ortho-carbonates
-
- 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
- C10M2209/10—Macromolecular compoundss obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
- C10M2209/102—Polyesters
- C10M2209/1023—Polyesters 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
- C10M2209/00—Organic macromolecular compounds containing oxygen as ingredients in lubricant compositions
- C10M2209/10—Macromolecular compoundss obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
- C10M2209/103—Polyethers, i.e. containing di- or higher polyoxyalkylene groups
- C10M2209/1033—Polyethers, i.e. containing di- or higher polyoxyalkylene groups 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
- C10M2215/00—Organic non-macromolecular compounds containing nitrogen as ingredients in lubricant compositions
- C10M2215/22—Heterocyclic nitrogen compounds
- C10M2215/223—Five-membered rings containing nitrogen and carbon only
-
- 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
- C10M2223/00—Organic non-macromolecular compounds containing phosphorus as ingredients in lubricant compositions
- C10M2223/02—Organic non-macromolecular compounds containing phosphorus as ingredients in lubricant compositions having no phosphorus-to-carbon bonds
- C10M2223/04—Phosphate esters
- C10M2223/043—Ammonium or amine salts thereof
Abstract
The invention provides hydrophilic oil special for centrifugal pumps in outdoor and humid areas, which comprises the following components in percentage by weight: the base oil comprises base oil and additives, wherein the addition amount of the additives is 3.075-6.52% of the base oil, and the base oil at least comprises three components: 75-85% of polyether, 10-15% of polyester, alcohol: 5% -10%, the additive comprises at least five components: 0.2 to 1 percent of ashless type anti-wear, anti-rust and anti-oxidation multifunctional additive, 2 to 5 percent of HLB value regulator, 0.02 to 0.8 percent of high anti-rust additive, 0.005 to 0.02 percent of high water-resistant composite anti-foaming agent and 0.05 to 0.5 percent of multifunctional anti-corrosion additive. The product of the invention can still well protect equipment under the condition of entering moisture, so that the equipment can maintain good lubrication and still normally run.
Description
Technical Field
The invention belongs to the technical field of chemical industry, and particularly relates to hydrophilic oil special for centrifugal pumps in outdoor and humid areas and a preparation method thereof.
Background
The centrifugal pump is one of various water conservancy machines which is most widely applied and is a machine which is most closely connected with daily life and production activities, in recent years, the centrifugal pump is more and more widely applied to water supply and drainage, agricultural engineering, petroleum industry, aerospace and navigation engineering, the occupied proportion of the centrifugal pump is larger, the centrifugal pump plays a role of a heart in the process of transporting raw materials, and irrecoverable loss can occur once a fault occurs. Particularly in the fields of water supply and drainage, agricultural engineering, aerospace and navigation engineering, which are in contact with water and have moist environment, the existence of moisture is easy to enter a lubricating system to cause equipment lubrication failure, so that more special requirements are provided for centrifugal pump oil than other lubricating oil, no special oil special for the centrifugal pump exists at present, the lubricating oil used for the centrifugal pump at present is mainly replaced by anti-wear hydraulic oil, the quality index of the anti-wear hydraulic oil completely cannot meet the special requirements of the centrifugal pump, the requirement of the anti-wear hydraulic oil on the moisture is quickly separated, the oil tank of the centrifugal pump is less, the continuous operation is realized, and the sufficient settling time cannot be provided for oil products in the centrifugal pump, so that the moisture can form uneven distribution in the lubricating system, the lubricating film is easy to damage, the lubricating system and the wear equipment, and the entry of the moisture can also cause anti-foaming damage and the rusting of the equipment. The hydrophilic oil special for the centrifugal pump in the outdoor and humid areas can well solve the problems.
Disclosure of Invention
In order to solve the problems, the invention provides hydrophilic oil special for centrifugal pumps in outdoor and humid areas and a preparation method thereof.
The technical scheme of the invention is realized as follows: a hydrophilic oil special for centrifugal pumps in outdoor and humid areas comprises the following components in percentage by weight: the base oil comprises base oil and additives, wherein the addition amount of the additives is 3.075 to 6.52 percent of the base oil, and the base oil at least comprises three components: 75-85% of polyether, 10-15% of polyester, alcohol: 5% -10%, the additive comprises at least five components: 0.2 to 1 percent of ashless type anti-wear, anti-rust and anti-oxidation multifunctional additive, 2 to 5 percent of HLB value regulator, 0.02 to 0.8 percent of high anti-rust additive, 0.005 to 0.02 percent of high water-resistant composite anti-foaming agent and 0.05 to 0.5 percent of multifunctional anti-corrosion additive;
preferably, the composition comprises the following components in percentage by weight: a base oil and an additive, the amount of additive being 4.6% of the base oil, the base oil comprising at least three components: polyether 80%, polyester 12%, alcohol: 8%, the additive at least comprises five components: 0.8 percent of ashless type anti-wear, anti-rust and anti-oxidation multifunctional additive, 3 percent of HLB value regulator, 0.4 percent of high anti-rust additive, 0.1 percent of high water resistance composite anti-foaming agent and 0.3 percent of multifunctional anti-corrosion additive.
Preferably, the molecular weight of the polyether is 800-1000, and the viscosity at 40 ℃ is 30-70CST;
preferably, the polyester is an ester-based olefin copolymer;
preferably, the alcohol is glycol or polyglycol alcohol;
preferably, the ashless type anti-wear, anti-rust and anti-oxidation multifunctional additive is a phosphorus compound consisting of one phosphorus atom, at least one aryl or alkyl group and other active groups, such as CI-, or OH-;
preferably, the high antirust additive is a thixotropic pasty calcium-based antirust agent;
preferably, the high water resistance composite antifoaming agent is compounded by a high-performance water resistance organosilicon type antifoaming agent and a three-dimensional synthetic hydrocarbon antifoaming agent;
preferably, the multifunctional preservative additive is benzotriazole preservative;
also provides a method for preparing the hydrophilic oil special for the centrifugal pump in outdoor and humid areas, which comprises the following steps:
(1) Adding polyether, polyester and alcohol into a reaction kettle, heating to 45-65 ℃, and stirring for 8-10 minutes;
(2) Sequentially adding an ashless anti-wear, anti-rust and anti-oxidant multifunctional additive, an HLB (hydrophile-lipophile balance) value regulator, a high anti-rust additive, a high water-resistance composite anti-foaming agent and a multifunctional anti-corrosion additive, stirring at the constant temperature of 60-70 ℃ for 60 minutes, and filtering by a filter bag with the diameter of 1 mu m to obtain a finished product.
The polyether can adopt No. 50 polyether, the polyether is a polymer with hydroxyl as a terminal group, and the viscosity at 40 ℃ is 50cst.
The polyester is an ester-based olefin copolymer, so that the polyester has the comprehensive performance of IV-type and V-type base oil, and the unique characteristic ensures that the polyester has excellent solubility to additives, can greatly reduce abrasion, prevents foam from forming and can form a hard and durable lubricating film in various materials; preferred polyester No. 30: v40=332mm2/s, VI =159, flash point =290 ℃, pour point-40 ℃, acid number =0.02mgKOH/g;
the alcohol is glycol or polyglycol alcohol, preferably terylene grade glycol;
the HLB value regulator is used for regulating the HLB value of the final product so as to well disperse the water in the product.
A high-water-resistance composite anti-foaming agent is a No. 4 composite anti-foaming agent, and is formed by compounding a high-performance water-resistance organosilicon type anti-foaming agent and a three-dimensional synthetic hydrocarbon anti-foaming agent, so that the problems that a common lubricating oil anti-foaming agent is poor in water resistance, and is quickly inactivated, rapidly increased in foam and incapable of being inhibited in the presence of water are solved.
The method for preparing the hydrophilic oil special for the centrifugal pump in the outdoor and humid areas comprises the following steps:
(1) Adding polyether, polyester and alcohol into a reaction kettle, heating to 45-65 ℃, and stirring for 8-10 minutes;
(2) Sequentially adding an ashless anti-wear, anti-rust and anti-oxidation multifunctional additive, an HLB (hydrophile-lipophile balance) value regulator, a high anti-rust additive, a high water-resistance composite anti-foaming agent and a multifunctional anti-corrosion additive, stirring at the constant temperature of 60-70 ℃ for 60 minutes, and filtering by a filter bag of 1 mu m to obtain a finished product.
The invention has the beneficial effects that: the invention has the advantages of excellent water dispersibility, anti-bubble retention, high wear resistance, high rust resistance under the condition of moisture, excellent low-temperature performance, excellent oxidation resistance, excellent temperature control performance, long service cycle and long water-resistant decay time.
Detailed Description
For better understanding and implementation, the following detailed description describes a special oil for centrifugal pumps in outdoor and humid areas of hydrophilic type and a preparation method thereof:
example 1: a hydrophilic special oil for centrifugal pumps in outdoor and humid areas is prepared from 800kg of polyether 50, 120kg of polyester 30, 80kg of ethylene glycol, 8kg of aryl phosphate mixed ammonium salt, 30kg of alkoxylated fatty alcohol, 4kg of ALOX 2290AS 4, 1kg of high-water-resistance composite antifoaming agent 4 and 3kg of benzotriazole.
The preparation method comprises the following steps: (1) Adding 800kg of polyether 50, 120kg of polyester 30 and 80kg of ethylene glycol into a reaction kettle, heating to 45-65 ℃, and stirring for 8-10 minutes;
(2) 8kg of aryl phosphate mixed ammonium salt, 30kg of alkoxylated fatty alcohol, 1kg of ALOX 2290AS 4, 1kg of No. 4 high water resistance composite antifoaming agent and 3kg of benzotriazole are sequentially added, stirred at the constant temperature of 60-70 ℃ for 60 minutes, and filtered by a filter bag of 1 micron to obtain a finished product.
(3) Quality index
Note 1: testing the water dispersibility: the mixture of 40ml of water and 40ml of special oil for the hydrophilic outdoor and wet area centrifugal pump is mechanically stirred in a water bath at 54 ℃ at the rotating speed of 1500rpm for 5 minutes and then is kept stand, and the layering condition of a water-oil mixing interface is observed and recorded along with the lapse of time, wherein the water layer is 0 within 1 hour, the oil layer is less than or equal to 2ml, the dispersion layer is greater than or equal to 78ml and is a top grade, and the water layer is greater than 1 within 1 hour, the oil layer is greater than 4ml and the dispersion layer is less than or equal to 75ml and is unqualified.
Comparative example 1: the common hydraulic oil of the centrifugal pump in the prior art is selected, and the internal components of the hydraulic oil are as follows: mineral base oil, and additives such as ZDDP, phosphate ester, phenolic antioxidant, metal deactivator T551, antifoaming agent 901, and demulsifier DL-32. The quality indexes are as follows:
quality index
Note 1: testing the water dispersibility: the mixture of 40ml water and 40ml hydrophilic oil specially used for centrifugal pumps in outdoor and humid areas is mechanically stirred for 5 minutes in a water bath at 54 ℃ at the rotating speed of 1500rpm, then is kept stand, and the layering condition of a water-oil mixing interface is observed and recorded along with the lapse of time, wherein the water layer is 0 within 1h, the oil layer is less than or equal to 2ml, the dispersion layer is more than or equal to 78ml, the mixture is a high-grade, and the water layer is more than 1 within 1h, the oil layer is more than 4ml, and the dispersion layer is less than or equal to 75ml, which is unqualified.
The viscosity-temperature performance, low-temperature performance, water dispersibility, anti-foaming retentivity and high anti-wear retentivity of the anti-wear hydraulic oil can be seen from the indexes of the anti-wear hydraulic oil, and the requirements of the invention are far not met.
From the two tables, the hydrophilic oil special for the centrifugal pump in the outdoor and humid areas has little influence on the anti-foaming performance of the hydrophilic oil special for the centrifugal pump, has larger influence on anti-grinding hydraulic oil, greatly reduces the foaming tendency and the defoaming capability, can not form an effective lubricating film in the running process of the pump due to the existence of foam, can cause the oil to overflow from a mail box, and can damage the equipment of the centrifugal pump.
The hydrophilic oil special for the centrifugal pump in the outdoor and humid areas has small influence on the abrasion resistance, has larger influence on the anti-abrasion hydraulic oil, increases the diameter of the abrasion spot by times, greatly reduces the abrasion resistance, and can not effectively protect the bearing of the centrifugal pump, so that the equipment is abraded.
The invention has excellent low-temperature performance, excellent oxidation resistance, excellent temperature control performance, excellent water dispersibility, anti-bubble retentivity, high wear resistance retentivity, high rust resistance under the condition of moisture, high wear resistance retentivity and anti-bubble retentivity, so that the water-resistant pump has long water-resistant decay time and long service life and can meet the special requirements of the centrifugal pump in an outdoor or humid place.
Claims (3)
1. The special hydrophilic oil for the centrifugal pump in outdoor and humid areas is characterized by comprising the following components in percentage by weight: the base oil comprises base oil and additives, wherein the addition amount of the additives is 3.075-6.52% of the base oil, and the base oil consists of three components: 75-85% of polyether, 10-15% of polyester, alcohol: 5% -10%, the additive is composed of five components: 0.2 to 1 percent of ashless type anti-wear, anti-rust and anti-oxidation multifunctional additive, 2 to 5 percent of HLB value regulator, 0.02 to 0.8 percent of high anti-rust additive, 0.005 to 0.02 percent of high water-resistant composite anti-foaming agent and 0.05 to 0.5 percent of multifunctional anti-corrosion additive; the polyether is polyether with hydroxyl as an end group, the molecular weight is 800-1000, and the viscosity is 30-70cSt at 40 ℃; the polyester is an ester-based olefin copolymer; the alcohol is glycol or polyglycol alcohol substance; the ashless anti-wear, anti-rust and anti-oxidation multifunctional additive is aryl phosphate mixed ammonium salt; the high antirust additive is a thixotropic pasty calcium-based antirust agent; the high water resistance composite antifoaming agent is formed by compounding a high-performance water resistance organosilicon type antifoaming agent and a three-dimensional synthetic hydrocarbon antifoaming agent; the multifunctional anticorrosive additive is a benzotriazole preservative.
2. The hydrophilic oil special for the centrifugal pump in the outdoor and humid areas as claimed in claim 1, which is characterized by comprising the following components in percentage by weight: a base oil and an additive in an amount of 4.6% of the base oil, the base oil consisting of three components: polyether 80%, polyester 12%, alcohol: 8%, the additive consists of five components: 0.8 percent of ashless type anti-wear, anti-rust and anti-oxidation multifunctional additive, 3 percent of HLB value regulator, 0.4 percent of high anti-rust additive, 0.1 percent of high water resistance composite anti-foaming agent and 0.3 percent of multifunctional anti-corrosion additive.
3. Process for the preparation of the oil specific for centrifugal pumps of the hydrophilic type for outdoor and humid areas according to any of claims 1 to 2, characterized in that it comprises the following steps:
(1) Adding polyether, polyester and alcohol into a reaction kettle, heating to 45-65 ℃, and stirring for 8-10 minutes;
(2) Sequentially adding an ashless anti-wear, anti-rust and anti-oxidation multifunctional additive, an HLB (hydrophile-lipophile balance) value regulator, a high anti-rust additive, a high water-resistance composite anti-foaming agent and a multifunctional anti-corrosion additive, stirring at the constant temperature of 60-70 ℃ for 60 minutes, and filtering by a filter bag of 1 mu m to obtain a finished product.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110074662.3A CN112694939B (en) | 2021-01-20 | 2021-01-20 | Hydrophilic oil special for centrifugal pumps in outdoor and humid areas and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110074662.3A CN112694939B (en) | 2021-01-20 | 2021-01-20 | Hydrophilic oil special for centrifugal pumps in outdoor and humid areas and preparation method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112694939A CN112694939A (en) | 2021-04-23 |
| CN112694939B true CN112694939B (en) | 2022-12-02 |
Family
ID=75515798
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110074662.3A Active CN112694939B (en) | 2021-01-20 | 2021-01-20 | Hydrophilic oil special for centrifugal pumps in outdoor and humid areas and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112694939B (en) |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3981793B2 (en) * | 1999-07-21 | 2007-09-26 | 日本精工株式会社 | Lubricant supply body, and rolling bearing, linear guide and ball screw provided with the lubricant supply body |
| CN108913307A (en) * | 2018-07-25 | 2018-11-30 | 烟台恒邦化工有限公司 | A kind of food-grade Ashless type long-life antiwear hydraulic oil and preparation method thereof |
| CN111690457A (en) * | 2020-07-08 | 2020-09-22 | 卡松科技股份有限公司 | Synthetic environment-friendly refrigerator oil |
-
2021
- 2021-01-20 CN CN202110074662.3A patent/CN112694939B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN112694939A (en) | 2021-04-23 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US4419252A (en) | Aqueous lubricant | |
| CN101921654A (en) | Oil-gas lubricating oil and production method thereof | |
| CN107338096A (en) | A kind of environment-friendly type superfine milling oil and preparation method thereof | |
| CN107987927B (en) | Steel wire rope oil composition | |
| CN108690698A (en) | A kind of high-effect wear-resistant Saving Energy by Lubrication fluid composition and preparation method thereof | |
| CN113122357A (en) | Motor vehicle brake fluid composition and preparation method thereof | |
| US5494595A (en) | Oil soluble polyethers | |
| EP1979448A1 (en) | Lubricant oil and lubricating oil additive concentrate compositions | |
| CN112694939B (en) | Hydrophilic oil special for centrifugal pumps in outdoor and humid areas and preparation method thereof | |
| CN114381319A (en) | Emulsified oil for copper and copper alloy wire drawing and preparation method thereof | |
| CN111500348A (en) | Fully-synthetic elevator gear oil composition and preparation method thereof | |
| CN109504515B (en) | Energy-saving environment-friendly agricultural machine oil and preparation method thereof | |
| CN108570342A (en) | Degradable compressor oil composition and preparation method thereof | |
| CN111471029B (en) | Liquid multi-effect lubricating oil oiliness agent and preparation method thereof | |
| CN111205919B (en) | Environment-friendly biostable cutting fluid and preparation method thereof | |
| US4601838A (en) | Water-soluble chlorinated fatty ester additives | |
| CN108795543A (en) | A kind of engineering machinery dedicated hydraulic fluid composition | |
| CN111718780A (en) | Turbine oil composition and use thereof | |
| CN115537247B (en) | Wear-resistant additive, wear-resistant lubricating oil and preparation method | |
| CN104277897A (en) | Low-freezing point anti-wear hydraulic oil and preparation method thereof | |
| CN115305130B (en) | Extreme pressure turbine oil composition with low oil sludge precipitation tendency, preparation method and application thereof | |
| CN110845419B (en) | Extreme pressure antiwear agent and road vehicle gear oil containing same | |
| CN113831948B (en) | Hydraulic oil complexing agent and preparation method thereof | |
| CN117511633A (en) | Low-carbon environment-friendly high-performance industrial gear oil and preparation method and application thereof | |
| CN114479993A (en) | Chain oil composition compatible with water-based paint and preparation method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |