Highly waterproof steel cable protective grease and preparation method thereof

Abstract

The invention provides highly waterproof steel cable protective grease and a preparation method thereof, and relates to the technical field of steel wire rope lubricating grease. The highly waterproof steel cable protective grease comprises the following components in percentage by mass: 35-50% of high-viscosity base oil, 5-15% of a high-melting-point amino organic matter, 10-30% of a viscosity index improver and 30-50% of high-melting-point anti-rust microcrystalline wax, wherein the total amount of the components is 100%. The invention relates to highly waterproof steel cable protective grease, which is prepared by densifying high-viscosity base oil with high-melting-point amino organic matters and matching with antirust microcrystalline wax with high antirust performance, and the product is endowed with excellent metal surface adhesive force, so that the waterproof performance of the grease special for steel cables is obviously improved; and the product can be isolated from the surrounding watery environment for a long time.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of steel wire rope lubricating grease, in particular to a high waterproof steel cable rope protective grease and a preparation method thereof. BACKGROUND

[0002] China's FAST (500-meter Aperture Spherical radio Telescope) is a radio telescope with the largest single aperture in the world, which was completed in September 2016 after more than 20 years of research and development by the National Astronomical Observatory of China. FAST is the most sensitive radio telescope in the world with independent intellectual property rights. The FAST feed cabin is pulled by six sets of supports and a steel wire rope with a diameter of about 50 mm. Each support system weighs 7 tons, and the steel cable bears about 100 KN.

[0003] FAST is located in the mountainous area of Pingtang County, Guizhou Province, China. The area is a karst area with a tropical rainforest climate and perennial rainfall. The average humidity of the environment is more than 70%. In addition, the FAST steel cable bears a large load. The FAST steel cable requires a special grease film that has good metal surface adhesion at 55°C, can effectively isolate the effects of the environment, can withstand the scouring of rainwater, and the oil film does not change within a 5-year cycle. Therefore, the steel wire rope grease suitable for FAST steel cable must have outstanding metal surface adhesion and waterproof performance.

[0004] At present, the base oil of the domestic steel cable special grease mainly includes extract oil, general residual oil, and residual rust-preventing microcrystalline wax. The thickening agent mainly includes petroleum wax and polyethylene wax, and there are few high-melting-point amine-based organic compounds used as thickening agents to improve the metal surface adhesion of the product. There is no report on the formula of the related FAST steel cable special grease abroad. The base oil mainly includes synthetic oil, and the thickening agent mainly includes asphalt, polyurethane, and urea compounds.

[0005] Chinese patent application CN105238506A discloses a steel wire rope protective grease, which includes the following components in parts by weight: base oil 100, thickening agent 3-10, viscosity protective oil 2-14, and rust inhibitor 3-13. The base oil is mixed from wax oil and solvent oil at a mixing ratio of (1-5):1. Since the thickening agent in CN105238506A is selected from any one or a combination of at least two of polyethylene wax, phenolic resin, and petroleum resin, the metal surface adhesion and waterproof performance need to be further improved.

[0006] Therefore, there is an urgent need to provide a steel cable rope protective grease with outstanding metal surface adhesion and waterproof performance and a preparation method thereof. SUMMARY

[0007] In view of the problems in the prior art, the present application provides a high waterproof steel cable rope protection grease, which is prepared from high melting point amine-based organic matter thickened large viscosity base oil and rust-preventing microcrystalline wax with high rust-preventing performance. By imparting the product with excellent metal surface adhesion, the waterproof performance of the steel cable special grease is obviously improved, the product can be kept isolated from the surrounding environment with much water for a long time, and the grease film is not lost, not emulsified and kept stable in protective ability during a long service period.

[0008] The first aspect of the present application is to provide a high waterproof steel cable rope protection grease, which contains the following components in mass fraction, based on 100% of the total amount of the high waterproof steel cable rope protection grease: large viscosity base oil 35-50%, high melting point amine-based organic matter 5-15%, tackifier 10-30%, and high melting point rust-preventing microcrystalline wax 30-50%.

[0009] Preferably, the mass ratio of the large viscosity base oil, the high melting point amine-based organic matter and the high melting point rust-preventing microcrystalline wax is 3-7:1:2-6.

[0010] Preferably, the large viscosity base oil is selected from one or more of intermediate base oil, paraffin base oil and naphthenic base oil, the kinematic viscosity of the large viscosity base oil at 40℃ is not less than 1000mm 2 / s, and the freezing point is not less than -12℃.

[0011] Preferably, the high melting point amine-based organic matter is selected from one or two of fatty amine-based organic matter, alcohol amine-based organic matter and amide-based organic matter, and the melting point of the high melting point amine-based organic matter is between 80-160℃.

[0012] Preferably, the tackifier is selected from terpolymer, polyolefin or polymethacrylate, the average molecular weight of the tackifier is not more than 2500, and the shear stability index is not more than 20.

[0013] Preferably, the high melting point rust-preventing microcrystalline wax has a drop melting point of not less than 70℃, and a kinematic viscosity of not less than 25mm 2 / s at 100℃.

[0014] The second aspect of the present application is to provide a preparation method of the above high waterproof steel cable rope protection grease, which comprises the following steps: putting high melting point rust-preventing microcrystalline wax into large viscosity base oil, heating to 100℃±5℃ and standing until the microcrystalline wax is completely melted; putting high melting point amine-based organic matter and tackifier, heating to 160℃±5℃, stirring for 2 hours, and keeping the stirring speed at 250-300r / min, and then discharging the kettle to obtain the high waterproof steel cable rope protection grease.

[0015] Compared with the prior art, the present application has the following beneficial effects: 1) It has excellent adhesion to metal surfaces, and its adhesion performance can reach 100% under dynamic conditions of 55℃ and 380r / min; 2) Excellent film-forming properties, which can instantly form a cured film on the surface of steel wire or rope, effectively isolating the steel wire rope from the working environment; 3) Excellent waterproof performance, able to prevent water loss and emulsification even under static conditions with large amounts of water.

[0016] The high waterproof steel cable protective grease provided by this invention, composed of specific components and in specific proportions, has outstanding adhesion to metal surfaces and excellent film-forming properties. It can effectively isolate steel wire ropes from the surrounding environment at high temperatures, preventing harmful substances from corroding the steel wire ropes. Detailed Implementation

[0017] Example 1: Add 30 kg of high-melting-point rust-preventive microcrystalline wax to 44 kg of intermediate-base high-viscosity base oil, heat to 102°C, and let stand until the microcrystalline wax is completely melted; add 14 kg of alkanolamine organic matter and 12 kg of terpolymer viscosity index agent, heat to 160°C, stir for 2 hours at a stirring speed of 250 r / min, and remove from the kettle to obtain high waterproof steel cable rope protective grease.

[0018] Example 2: Add 35 kg of high-melting-point rust-preventive microcrystalline wax to 40 kg of intermediate-base high-viscosity base oil, heat to 104°C, and let stand until the microcrystalline wax is completely melted; add 10 kg of fatty amine organic matter and 15 kg of polyolefin viscosity indexing agent, heat to 156°C, stir for 2 hours at a stirring speed of 300 r / min, and remove from the kettle to obtain high waterproof steel cable rope protective grease.

[0019] Example 3: Add 32 kg of high-melting-point rust-preventing microcrystalline wax to 35 kg of intermediate-base high-viscosity base oil, heat to 95°C, and let stand until the microcrystalline wax is completely melted; add 15 kg of alkanolamine organic matter and 18 kg of terpolymer, heat to 164°C, stir for 2 hours at a stirring speed of 250 r / min, and remove from the reactor to obtain the final product.

[0020] Comparative Example 1: Add 30 kg of high-melting-point rust-preventive microcrystalline wax to 27 kg of intermediate-base high-viscosity base oil, heat to 102°C, and let stand until the microcrystalline wax is completely melted; add 3 kg of alkanolamine organic matter and 40 kg of terpolymer viscosity indexing agent, heat to 160°C, stir for 2 hours at a stirring speed of 250 r / min, and remove from the reactor to obtain the final product.

[0021] Comparative Example 2: Add 20 kg of high-melting-point rust-preventive microcrystalline wax to 52 kg of intermediate-base high-viscosity base oil, heat to 104°C, and let stand until the microcrystalline wax is completely melted; add 20 kg of fatty amine organic matter and 8 kg of polyolefin viscosity indexing agent, heat to 156°C, stir for 2 hours at a stirring speed of 250 r / min, and remove from the reactor to obtain the final product.

[0022] Comparative Example 3: Add 60 kg of high-melting-point rust-preventing microcrystalline wax to 20 kg of intermediate-base high-viscosity base oil, heat to 95°C, and let stand until the microcrystalline wax is completely melted; add 15 kg of alkanolamine organic matter and 15 kg of terpolymer, heat to 164°C, stir for 2 hours at a stirring speed of 250 r / min, and remove from the reactor to obtain the final product.

[0023] Test Example 1: The products of Examples 1-3 and Comparative Examples 1-3 were subjected to performance tests, and the results are shown in Table 1.

[0024] Table 1: Test results of the performance of steel cable protective grease in Examples 1-3 and Comparative Examples 1-3

[0025] According to the data in the table, the steel cable protective greases obtained in Examples 1-3 of this invention, under specific component composition and specific mass fraction conditions, exhibit significantly better overall performance than the comparative examples in terms of dropping point, metal surface adhesion, film-forming properties, and waterproofing. Specifically, the steel cable protective greases obtained in Examples 1-3 demonstrate outstanding metal surface adhesion, achieving 100% adhesion under dynamic conditions of 55℃ and 380r / min. Among the comparative examples 1-3, only Comparative Example 2 shows a relatively high adhesion rate of 66.31%, while Comparative Example 3 exhibits the worst metal surface adhesion at only 2.12%.

[0026] Finally, it should be noted that the above content is only used to illustrate the technical solution of the present invention, and is not intended to limit the scope of protection of the present invention. Simple modifications or equivalent substitutions made by those skilled in the art to the technical solution of the present invention do not depart from the essence and scope of the technical solution of the present invention.

Claims

1. A high-waterproof steel cable protective grease, wherein the high-waterproof steel cable protective grease comprises the following components by mass fraction, based on a total of 100%: 35-50% high-viscosity base oil, 5-15% high-melting-point amine organic compound, 10-30% viscosity index enhancer, and 30-50% high-melting-point rust-preventive microcrystalline wax.

2. The high waterproof steel cable protective grease according to claim 1, characterized in that... It has excellent adhesion, film-forming and waterproof properties, and the mass ratio of the high viscosity base oil, high melting point amine organic compound and high melting point rust-preventive microcrystalline wax is 3-7:1:2-6.

3. The high waterproof steel cable protective grease according to claim 1, characterized in that, The high-viscosity base oil is selected from one or more of intermediate-based base oils, paraffinic base oils, and naphthenic base oils, and the kinematic viscosity of the high-viscosity base oil at 40°C is not less than 1000 mmHg. 2 / s, and the freezing point is not lower than -12℃.

4. The high waterproof steel cable protective grease according to claim 1, characterized in that, The high-melting-point amine organic compound is selected from one or two of aliphatic amine organic compounds, alcoholic amine organic compounds, and amide organic compounds, and the melting point of the high-melting-point amine organic compound is between 80-160℃.

5. The high waterproof steel cable protective grease according to claim 1, characterized in that, The viscosity index agent is selected from terpolymers, polyolefins, or polymethacrylates, and the average molecular weight of the viscosity index agent is not greater than 2500, and the shear stability index is not greater than 20.

6. The high waterproof steel cable protective grease according to claim 1, characterized in that, The high-melting-point anti-rust microcrystalline wax droplets have a melting point of not less than 70℃ and a kinematic viscosity of not less than 25 mm at 100℃. 2 / s.

7. The method for preparing the high waterproof steel cable protective grease according to any one of claims 1-6, wherein the preparation method comprises the following steps: Add high-melting-point rust-preventive microcrystalline wax to high-viscosity base oil, heat to 100℃±5℃, and let stand until the microcrystalline wax is completely melted; add high-melting-point amine organic matter and viscosity index enhancer, heat to 160℃±5℃, stir for 2 hours, and maintain the stirring speed at 250-300r / min. Remove from the kettle to obtain high-waterproof steel cable rope protective grease.

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