阅读说明：本技术 一种润滑脂组合物及其制备方法 (Lubricating grease composition and preparation method thereof ) 是由 任海栋 卓杰夫 于 2020-05-20 设计创作，主要内容包括：本发明公开了一种润滑脂组合物,按照重量百分比计,该润滑脂组合物包含以下组分且各组分含量为：基础油60~70%,增稠剂15~20%,抗氧剂2~4%,高分子醇类1~3%,以及植物胺3~22%。本发明还公开了该润滑脂的制备方法,包括：1)将基础油置于反应釜中,加入高分子醇类和植物胺,然后通入惰性气体并在惰性气氛下进行搅拌反应,得到产物一；在步骤1)所得的产物一中加入增稠剂并在120~140℃下反应10~30min,然后将反应釜降温至80~90℃加入抗氧剂并保持持续充分搅拌30~60min,即得润滑脂组合物。本发明的润滑脂理化性能优异,并且其制备方法简单,制备周期短,适于工业化生产,具有广泛的应用前景。(The invention discloses a lubricating grease composition, which comprises the following components in percentage by weight: 60-70% of base oil, 15-20% of thickening agent, 2-4% of antioxidant, 1-3% of high molecular alcohol and 3-22% of plant amine. The invention also discloses a preparation method of the lubricating grease, which comprises the following steps: 1) placing base oil in a reaction kettle, adding high-molecular alcohols and plant amine, then introducing inert gas, and carrying out stirring reaction under inert atmosphere to obtain a product I; adding a thickening agent into the product I obtained in the step 1), reacting for 10-30 min at 120-140 ℃, then cooling the reaction kettle to 80-90 ℃, adding an antioxidant, and keeping continuously and fully stirring for 30-60 min to obtain the lubricating grease composition. The lubricating grease disclosed by the invention is excellent in physical and chemical properties, simple in preparation method, short in preparation period, suitable for industrial production and wide in application prospect.)

1. The lubricating grease composition comprises the following components in percentage by weight: 60-70% of base oil, 15-20% of thickening agent, 2-4% of antioxidant, 1-3% of high molecular alcohol and 3-22% of plant amine.

2. The grease composition according to claim 1, wherein the grease composition comprises the following components in percentage by weight: 70% of base oil, 15% of thickening agent, 3% of antioxidant, 2% of high molecular alcohol and 10% of plant amine.

3. The grease composition according to claim 1, wherein the base oil is a mixture of at least two of group I mineral oils, group II mineral oils, polyolefin synthetic base oils, ester base oils, naphthenic base oils, and paraffinic base oils, and has a kinematic viscosity of 200 to 600mm at 40 ℃²(s) a kinematic viscosity at 100 ℃ of 15 to 40mm²/s。

4. A grease composition according to claim 3, wherein the thickener is selected from one or more of atactic polypropylene, amorphous alpha-olefin copolymers, bentonite, silica.

5. Grease composition according to claim 1, wherein the antioxidant is selected from one or more of bisphenol A, N-phenyl alpha naphthylamine, diphenylamine, 2, 6-di-tert-butyl-p-cresol, zinc dialkyldithiophosphate.

6. The grease composition according to claim 1, wherein the high molecular alcohol is selected from one or more of polyethylene glycol 2000, polyethylene glycol 3000, polyethylene glycol 4000, polyethylene glycol 6000 and polyethylene glycol 8000.

7. Grease composition according to claim 1, wherein the vegetable amine is selected from laurylamine or cocoamine.

8. A method of preparing a grease composition according to any one of claims 1 to 7, the method comprising the steps of:

1) placing base oil in a reaction kettle, adding high-molecular alcohols and plant amine, then introducing inert gas, and carrying out stirring reaction under inert atmosphere to obtain a product I;

2) adding a thickening agent into the product I obtained in the step 1), reacting for 10-30 min at 120-140 ℃, then cooling the reaction kettle to 80-90 ℃, adding an antioxidant, and keeping continuously and fully stirring for 30-60 min to obtain the lubricating grease composition.

9. The method according to claim 8, wherein the inert gas in the step 1) is nitrogen or argon.

10. The preparation method according to claim 8, wherein the reaction conditions in the step 1) are: the temperature is 80-100 ℃, and the time is 30-60 min.

Technical Field

The invention belongs to the technical field of lubricating materials in the chemical industry, and particularly relates to a lubricating grease composition and a preparation method thereof.

Background

Grease-like semisolid such as grease. The friction part is used for the machinery and plays a role in lubrication and sealing. Also used on metal surface to fill gap and prevent rust. Is prepared mainly from mineral oil (or synthetic lubricating oil) and thickening agent.

According to the thickening agent, the thickening agent can be divided into soap-based grease and non-soap-based grease: the thickener of soap base grease is usually metal soap such as lithium, sodium, calcium, aluminum, zinc and the like, and also metal soap such as potassium, barium, lead, manganese and the like; the thickener of non-soap base grease is made of graphite, carbon black, asbestos and synthetic (such as polyurea and bentonite). The grease composition can be divided into general grease and special grease according to the application, wherein the former is used for general mechanical parts, and the latter is used for tractors, railway locomotives, ship machinery, petroleum drilling machinery, valves and the like.

With the rapid development of modern industry, the requirements on the lubricating grease are higher and higher, and the high-quality multi-effect lubricating grease is the development direction of the lubricating grease. The single lubricating grease is more and more difficult to meet the market demand in long-term development, so that a composite lubricating grease appears, and a proper substance is added on the basis of the original single lubricating grease, so that the novel lubricating grease has excellent high and low temperature performance, mechanical safety, colloid stability, oxidation stability, water resistance, corrosion resistance, excellent antirust performance and extreme pressure wear resistance.

For example, application numbers are: the CN200910182033.1 Chinese patent invention discloses a flame-retardant lubricating grease and a preparation method thereof, wherein the flame-retardant lubricating grease comprises, by weight, 0.5-5 parts of calcium soap fatty acid, 2.5-15 parts of lithium soap fatty acid, 0.1-5.0 parts of an inorganic thickening agent, 0.5-5.0 parts of a dispersing agent, 0.01-1.0 parts of an antioxidant, 0.1-8 parts of a flame retardant, 0.1-0.5 parts of an antirust agent and 60-97 parts of base oil. The composite lubricating grease has good flame retardance, excellent mechanical stability, water resistance, lubricity, rust resistance and flame retardance, longer service life and low cost, and can replace the common lithium-based lubricating grease used in coal mines, subways, metallurgy and the like at present. The lubricating grease has complex components, complex preparation method and high process requirement.

As another example, application numbers are: chinese patent CN201210581258.6 discloses a hydrocarbon-based grease for surface protection of steel wire ropes and a preparation method thereof. The hydrocarbon lubricating grease comprises the following components in percentage by weight: base oil: 52.0-78.0%; microcrystalline wax: 10.0-35.0%; thickening agent: 8.0-30.0%; alkyl diphenylamine: 0.25-0.6%; barium petroleum sulfonate: 1.5-3.0%; lanolin calcium soap: 1.5-3.0%; the sum of the weight percentages is 100 percent; the base oil is base oil with the kinematic viscosity of 10.0-40.0 mm2/s at 100 ℃, and the thickening agent is APP or APAO; the drop melting point of the microcrystalline wax is 65-85 ℃. According to the invention, APP or APAO is selected as the thickening agent, so that the dropping point of the hydrocarbon lubricating grease is improved, the adhesion performance of the hydrocarbon lubricating grease is enhanced, and the antirust and anticorrosive performances are excellent. The lubricating grease is mainly used for the protection requirement of the surface of a steel wire rope, the application is limited, and the application range is narrow.

Based on the above, a grease composition with simple components and a preparation method thereof are desired, wherein the grease composition not only has rust prevention and corrosion prevention properties, but also has excellent high and low temperature properties, mechanical safety, colloid stability, oxidation stability, water resistance and corrosion resistance, and excellent rust prevention properties and extreme pressure wear resistance.

Disclosure of Invention

The invention mainly aims to overcome the defects in the conventional lubricating grease and provide a lubricating grease composition and a preparation method thereof. The lubricating grease composition has simple components and excellent performance. The preparation method of the lubricating grease disclosed by the invention is simple in process, mild in condition and suitable for industrial production.

The purpose of the invention and the technical problem to be solved are realized by adopting the following technical scheme.

The invention provides a lubricating grease composition, which comprises the following components in percentage by weight: 60-70% of base oil, 15-20% of thickening agent, 2-4% of antioxidant, 1-3% of high molecular alcohol and 3-22% of plant amine.

The lubricating grease composition comprises the following components in percentage by weight: 70% of base oil, 15% of thickening agent, 3% of antioxidant, 2% of high molecular alcohol and 10% of plant amine.

The grease composition, wherein the base oil is a mixture of at least two of group I mineral oil, group II mineral oil, polyolefin synthetic base oil, ester base oil, naphthenic base oil, and paraffinic base oil, and has a kinematic viscosity of 200 to 600mm at 40 ℃²(s) a kinematic viscosity at 100 ℃ of 15 to 40mm²/s。

The grease composition of the present invention, wherein the thickener is one or more selected from atactic polypropylene, amorphous α -olefin copolymer, bentonite, and silica.

The lubricating grease composition, wherein the antioxidant is selected from one or more of N-phenyl alpha naphthylamine, diphenylamine, 2, 6-di-tert-butyl-p-cresol and zinc dialkyl dithiophosphate.

In the grease composition, the high molecular alcohol is selected from one or more of polyethylene glycol 2000, polyethylene glycol 3000, polyethylene glycol 4000, polyethylene glycol 6000, and polyethylene glycol 8000.

The grease composition of the preceding, wherein the vegetable amine is selected from laurylamine or cocoamine.

The object of the present invention and the technical problems solved thereby can be further achieved by the following technical measures.

The present invention also provides a method of preparing a grease composition, the method comprising the steps of:

1) placing base oil in a reaction kettle, adding high-molecular alcohols and plant amine, then introducing inert gas, and carrying out stirring reaction under inert atmosphere to obtain a product I;

2) adding a thickening agent into the product I obtained in the step 1), reacting for 10-30 min at 120-140 ℃, then cooling the reaction kettle to 80-90 ℃, adding an antioxidant, and keeping continuously and fully stirring for 30-60 min to obtain the lubricating grease composition.

In the preparation method, in step 1), the inert gas is nitrogen or argon.

The preparation method described above, wherein the reaction conditions in the step 1) are: the temperature is 80-100 ℃, and the time is 30-60 min.

By the technical scheme, the invention at least has the following advantages: the invention is an improvement of the prior art, and the lubricating grease composition has simple components and only contains base oil, a thickening agent, an antioxidant, high molecular alcohols and plant amine. The lubricating grease composition disclosed by the invention is added with a small amount of macromolecular alcohols and plant amine on the basis of the original lubricating grease composition, and the performance of the lubricating grease can be synergized, so that the lubricating grease composition not only has the anti-rust and anti-corrosion performances, but also has excellent high and low temperature performance, mechanical safety, colloid stability, oxidation stability, water resistance and corrosion resistance, and excellent anti-rust performance and extreme pressure wear resistance. In addition, the lubricating grease composition disclosed by the invention is simple in preparation method, mild in condition and suitable for industrial production.

In conclusion, the special grease composition of the present invention has excellent performance. The grease composition has a plurality of advantages and practical values, does not have similar design publication or use in the similar products and methods, is innovative, has great improvement on the method or the function, has great technical progress, produces good and practical effects, has multiple enhanced effects compared with the prior grease composition and the preparation method thereof, is more practical, has industrial wide utilization value, and is a novel, improved and practical new design.

The foregoing is a summary of the present invention, and in order to provide a clear understanding of the technical means of the present invention and to be implemented in accordance with the present specification, the following is a detailed description of the preferred embodiments of the present invention.

Detailed Description

In order to make the technical means, the creation features, the achievement purposes and the effects of the invention easy to understand, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Hereinafter, the details will be described with reference to specific examples, wherein the respective raw materials are based on 100 parts of the total amount.