阅读说明：本技术 一种混合皂基电器触点润滑脂 (Mixed soap-based electrical appliance contact lubricating grease ) 是由 李林芳 于 2020-12-23 设计创作，主要内容包括：本发明公开了一种混合皂基电器触点润滑脂,它由润滑剂、稠化剂、添加剂配制而成,其中,基础油由PAO烯烃油和聚醚合成油组成,稠化剂为混合皂基,由12-羟基硬脂酸、合成无机皂基组成,添加剂由抗氧添加剂和防锈添加剂组成,各原料按质量百分比计如下：PAO烯烃油40-50%、聚醚合成油44-52%、12-羟基硬脂酸4-6%、无机二氧化硅皂2-3%、抗氧添加剂0.3-0.5%和防锈添加剂0.3-0.5%。它具有极好的耐温性,优秀的机械安定性,可以延长使用寿命,减少有害电弧,产生高质量的开关手感。(The invention discloses a mixed soap base electric appliance contact lubricating grease which is prepared from a lubricating agent, a thickening agent and an additive, wherein base oil consists of PAO olefin oil and polyether synthetic oil, the thickening agent is a mixed soap base and consists of 12-hydroxystearic acid and a synthetic inorganic soap base, the additive consists of an antioxidant additive and an antirust additive, and the raw materials are as follows by mass percent: 40-50% of PAO olefin oil, 44-52% of polyether synthetic oil, 4-6% of 12-hydroxystearic acid, 2-3% of inorganic silicon dioxide soap, 0.3-0.5% of antioxidant additive and 0.3-0.5% of antirust additive. The high-temperature-resistant switch has excellent temperature resistance and mechanical stability, can prolong the service life, reduces harmful electric arcs and generates high-quality switch hand feeling.)

1. The mixed soap-based electrical contact lubricating grease is characterized by being prepared from a lubricating agent, a thickening agent and an additive, wherein base oil consists of PAO olefin oil and polyether synthetic oil, the thickening agent is a mixed soap base and consists of 12-hydroxystearic acid and a synthetic inorganic soap base, the additive consists of an antioxidant additive and an antirust additive, and the raw materials are as follows by mass percent:

40-50% of PAO olefin oil, 44-52% of polyether synthetic oil, 4-6% of 12-hydroxystearic acid, 2-3% of inorganic silicon dioxide soap, 0.3-0.5% of antioxidant additive and 0.3-0.5% of antirust additive.

2. The mixed soap-based electrical contact grease of claim 1, wherein the mass ratio of lithium hydroxide to water in the aqueous lithium hydroxide solution is 1: 3-4.

Technical Field

The invention belongs to the technical field of lubricating grease preparation, and particularly relates to mixed soap-based electric appliance contact lubricating grease.

Background

The current electric contact lubricating grease product used in the market is easy to run off in hot days, and in addition, if the switch is exposed in an extremely high-temperature environment for a long time, the base oil is often volatilized, and a thickening agent cannot continuously maintain a surface layer with insulating and grinding functions on the surface of the contact.

Disclosure of Invention

The invention aims to provide a mixed soap-based electrical appliance contact lubricating grease which has excellent temperature resistance and mechanical stability, can prolong the service life, reduce harmful electric arcs and generate high-quality switch hand feeling.

The invention provides a mixed soap base electric appliance contact lubricating grease which is prepared from base oil, a thickening agent and an additive, wherein the base oil consists of PAO olefin oil and polyether synthetic oil, the thickening agent is a mixed soap base and consists of 12-hydroxystearic acid and a synthetic inorganic soap base, the additive consists of an antioxidant additive and an antirust additive, and the raw materials are as follows by mass percent:

40-50% of PAO olefin oil, 44-52% of polyether synthetic oil, 4-6% of 12-hydroxystearic acid, 2-3% of inorganic silicon dioxide soap, 0.3-0.5% of antioxidant additive and 0.3-0.5% of antirust additive; the preparation method comprises the following steps:

heating 12-hydroxystearic acid and 1/3 base oil until all components are dissolved; when the temperature is 85-95 ℃, starting to add lithium hydroxide aqueous solution for saponification, controlling the temperature between 100 ℃ and 105 ℃, and finishing saponification for 2 h; heating to dehydrate until the temperature is 150 ℃, sampling and titrating with phenolphthalein, wherein the color is changed into red and is alkaline, and keeping for 30 minutes; adding synthetic inorganic soap base, stirring, and slowly adding the rest base oil for thickening; meanwhile, when the temperature is stirred and heated to 190 ℃, the base oil is added completely; when the temperature of the materials in the kettle reaches 205 +/-2 ℃ and becomes a true solution, immediately filtering the solution through a 120-mesh metal net, pouring the solution into a tray and cooling the solution; when the temperature is cooled to 90 ℃, adding the additive, and uniformly stirring to obtain the product.

Among the above, the mass ratio of lithium hydroxide to water in the lithium hydroxide aqueous solution is preferably 1:2 to 3.

The thickening agent of the invention selects 12-hydroxystearic acid and synthetic inorganic soap base, 12-hydroxystearic acid has excellent mechanical stability and colloid stability after saponification, wherein the 12-hydroxystearic acid comprises a very low friction coefficient, so that smoother lubricating grease can be generated, abrasion is reduced, the synthetic inorganic soap base is silicon dioxide rubber powder, the temperature resistance is good, the synthetic inorganic soap base does not flow at high temperature, and has damping feeling and high-quality switch hand feeling.

The base oil is water-insoluble polyether oil which adopts PAO olefin oil and polyether synthetic oil, wherein the viscosity of the PAO olefin oil is 46-50mm2/s at 40 ℃, the pour point is-48 ℃, the flash point is more than 250 ℃, the viscosity of the polyether synthetic oil is 25-35mm2/s at 40 ℃, the pour point is-45 ℃, and the flash point is more than 210 ℃. The two kinds of oil are light synthetic oil, have small effect on metal and rubber, high flash point, high viscosity index, low volatilization and low pour point, can be completely volatilized even if being burnt at high temperature, do not leave burnt sediments on equipment, and can reduce or eliminate harmful electric foxes generated due to current increase during switching.

The additive of the invention adopts an antioxidant and an antirusting agent, wherein the antioxidant is aromatic amine diphenylamine, phenyl-alpha-naphthylamine and phenol 2, 6-di-tert-butyl-p-cresol. The present invention selects alkyl diphenylamine (liquid). The antirust agent is mainly used for the rust prevention of nonferrous metals, such as tolyltriazole (liquid).

The product of the invention has better temperature resistance, high lubricating grease dropping point, compatibility with plastics, good electrical property, capability of generating smoother lubricating grease and excellent mechanical stability, wherein the lubricating grease dropping point is higher than that of the electric shock grease prepared from single lithium soap, the loss is reduced, the service life is prolonged, the noise is eliminated, harmful electric arc is reduced, high-quality switch hand feeling is generated, and the defect of no flowing at high temperature is overcome. Be applicable to completely household electrical appliances and car, industrial switch contact site such as electric power, electron also is applicable to car steering wheel combination formula switch, gleitbretter electric touch switch, the lubrication and the protection of positions such as conductive track, suitable temperature: -45-130 ℃.

Detailed Description

The invention provides a mixed soap base electric appliance contact lubricating grease which is prepared from base oil, a thickening agent and an additive, wherein the base oil consists of PAO olefin oil and polyether synthetic oil, the thickening agent is a mixed soap base and consists of 12-hydroxystearic acid and a synthetic inorganic soap base, the additive consists of an antioxidant additive and an antirust additive, and the raw materials are as follows by mass percent:

40-50% of PAO olefin oil, 44-52% of polyether synthetic oil, 4-6% of 12-hydroxystearic acid, 2-3% of inorganic silicon dioxide soap, 0.3-0.5% of antioxidant additive and 0.3-0.5% of antirust additive; the preparation method comprises the following steps:

heating 12-hydroxystearic acid with 1/3 base oil; when the temperature is 90 ℃, beginning to add a lithium hydroxide aqueous solution for saponification, wherein the mass ratio of lithium hydroxide to water in the lithium hydroxide aqueous solution is 1:3, the temperature is controlled to be 102 ℃, and the saponification is finished for 2 hours; heating to dehydrate until the temperature is 150 ℃, sampling and titrating with phenolphthalein, wherein the color is changed into red and is alkaline, and keeping for 30 minutes; adding synthetic inorganic soap base, stirring, and slowly adding the rest base oil for thickening; meanwhile, when the temperature is stirred and heated to 190 ℃, the base oil is added completely; when the temperature of the materials in the kettle reaches 205 +/-2 ℃ and becomes a true solution, immediately filtering the solution through a 120-mesh metal net, pouring the solution into a tray and cooling the solution; when the temperature is cooled to 90 ℃, adding the additive, and uniformly stirring to obtain the product. Sampling, grinding, measuring cone penetration and regulating cone penetration. Grinding for 2 times to form grease, and packaging after appearance, dropping point and cone penetration are qualified.

The following table shows the first and second examples:

the quality data and indices are shown in the following table:

although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.