CN118772938A - A water-soluble synthetic polyether industrial gear oil and its preparation method - Google Patents

Abstract

The present disclosure provides a water-soluble synthetic polyether type industrial gear oil and a preparation method thereof, belonging to the technical field of industrial gear oil, the industrial gear oil includes the following components by weight: 80-90 parts of water-soluble polyether, 1-5 parts of extreme pressure anti-wear agent, 0.5-1.5 parts of rust inhibitor, 1-5 parts of antioxidant, 5-10 parts of cosolvent, 0.01-1 parts of metal corrosion inhibitor, 0.01-1 parts of defoamer; the extreme pressure anti-wear agent is at least one of dialkyl dithiophosphate zinc, phosphate ester, and phosphate amine salt; the cosolvent is Guerbet alcohol and trimethylolpropane nonanoate. The present disclosure significantly improves the low temperature performance, anti-wear performance, stability performance and rust prevention performance of water-soluble synthetic polyether type industrial gear oil by adding specific extreme pressure anti-wear agent and cosolvent to industrial gear oil.

Description

A water-soluble synthetic polyether industrial gear oil and preparation method thereof

Technical Field

The present invention relates to the technical field of industrial gear oils, and in particular to a water-soluble synthetic polyether industrial gear oil and a preparation method thereof.

Background Art

With the improvement of productivity, the speed of machinery operation is faster, and precision gearbox equipment is becoming more and more popular. The characteristics of precision gearbox equipment are that the gearbox is getting smaller and smaller and the load is larger. Therefore, higher high temperature performance, lubrication performance and anti-corrosion and anti-rust performance are required for gear oil. Conventional mineral gear oil has poor high temperature performance and cannot meet the continuous high temperature operation of precision gearbox equipment. PAO synthetic gear oil has problems such as large temperature rise and low transmission efficiency. Oil-soluble polyether has insufficient lubricity. These problems will directly lead to reduced production efficiency and increased production costs. Water-soluble synthetic polyether industrial gear oil is more widely used due to its high viscosity index and better high temperature performance. At present, water-soluble synthetic polyether industrial gear oils are mainly compounded with water-soluble polyethers, chlorinated paraffin extreme pressure agents, alkenyl succinate rust inhibitors and octyl butyl diphenylamine, but the low-temperature performance of water-soluble polyethers is poor and they have strong water absorption. At the same time, they have poor solubility in other additives, which makes industrial gear oils prone to turbidity, chloride ion precipitation and stratification. When started at low temperatures, they cause wear and rust corrosion of gear box parts. Therefore, the low-temperature performance, anti-wear performance, stability performance and anti-rust performance of water-soluble synthetic polyether industrial gear oils still need to be improved.

Summary of the invention

The purpose of the present invention is to overcome the deficiencies of the prior art and provide a water-soluble synthetic polyether industrial gear oil and a preparation method thereof. The water-soluble synthetic polyether industrial gear oil has excellent low temperature performance, anti-wear performance, stability performance and anti-rust performance.

To achieve the above object, the technical solution adopted by the present disclosure is: a water-soluble synthetic polyether industrial gear oil, comprising the following components in parts by weight: 80-90 parts of water-soluble polyether, 1-5 parts of extreme pressure anti-wear agent, 0.5-1.5 parts of rust inhibitor, 1-5 parts of antioxidant, 5-10 parts of cosolvent, 0.01-1 parts of metal corrosion inhibitor, and 0.01-1 parts of defoaming agent;

The extreme pressure anti-wear agent is at least one of dialkyl dithiophosphate zinc, phosphate ester, and phosphate amine salt;

The cosolvents are Guerbet alcohols and trimethylolpropane nonanoate.

In one embodiment, the mass ratio of the Guerbet alcohol to trimethylolpropane nonanoate is (4-6):(2-4).

In one embodiment, the mass ratio of the co-solvent, the extreme pressure anti-wear agent and the rust inhibitor is co-solvent: extreme pressure anti-wear agent: rust inhibitor = (7-9): (2-4): 1.

In one embodiment, the extreme pressure anti-wear agent is phosphate ester and phosphate ester amine salt.

In one embodiment, the rust inhibitor is at least one of sodium petroleum sulfonate, N-oleoylsarcosine octadecylamine, and alkenyl succinate.

In one embodiment, the antioxidant is at least one of 2,6-di-tert-butyl-p-cresol, octylbutyldiphenylamine, octadecene phosphite, and dithiocarbamate derivatives.

In one embodiment, the metal corrosion inhibitor is at least one of a methylbenzotriazole derivative and benzotriazole.

In one embodiment, the defoaming agent is at least one of dimethyl silicone oil and polyacrylate.

On the other hand, a method for preparing the water-soluble synthetic polyether industrial gear oil is provided, comprising the following steps: mixing the components uniformly according to a certain proportion to obtain the water-soluble synthetic polyether industrial gear oil.

Compared with the prior art, the present invention has the following beneficial effects:

(1) The water-soluble synthetic polyether industrial gear oil provided by the present disclosure has excellent stability, low temperature performance, extreme pressure anti-wear performance and rust resistance; the oil has a long storage time, meets the use requirements in extreme high and low temperature environments, has high equipment transmission efficiency, and has a longer service life of components.

(2) The water-soluble synthetic polyether industrial gear oil disclosed in the present invention can be directly used for lubrication of precision gearboxes.

(3) The preparation method provided by the present disclosure is easy to operate, does not require special processes, and can be industrialized for production.

DETAILED DESCRIPTION

In order to make the purpose, technical solution and advantages of the embodiments of the present disclosure clearer, the technical solution in the embodiments of the present disclosure will be clearly and completely described below. Obviously, the described embodiments are part of the embodiments of the present disclosure, not all of the embodiments. Based on the embodiments in the present disclosure, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present disclosure.

In the present disclosure, there is no particular limitation on the specific dispersion and stirring treatment methods.

The reagents or instruments used in the present invention without indicating the manufacturer are all conventional products that can be obtained through commercial purchase.

The invention aims to solve the problems of poor low temperature performance, stability and lubricity of water-soluble polyether industrial gear oil in the prior art.

The present disclosure provides a water-soluble synthetic polyether industrial gear oil, comprising the following components in parts by weight: 80-90 parts of water-soluble polyether, 1-5 parts of extreme pressure anti-wear agent, 0.5-1.5 parts of rust inhibitor, 1-5 parts of antioxidant, 5-10 parts of cosolvent, 0.01-1 parts of metal corrosion inhibitor, and 0.01-1 parts of defoaming agent;

The extreme pressure anti-wear agent is at least one of dialkyl dithiophosphate zinc, phosphate ester, and phosphate amine salt;

The cosolvents are Guerbet alcohols and trimethylolpropane nonanoate.

The present invention adds a specific extreme pressure anti-wear agent to a water-soluble synthetic polyether type industrial gear oil to improve the anti-wear property of the industrial gear oil. Compared with conventional extreme pressure anti-wear agents, the extreme pressure anti-wear agent disclosed in the present invention has poorer solubility in water-soluble polyethers, so it is necessary to add a cosolvent to improve the compatibility between the water-soluble polyether and each component. However, the inventors have experimentally found that most of the existing solubilizers will affect the performance of the industrial gear oil, making it difficult to obtain higher low-temperature performance, stability, anti-wear performance and anti-rust performance. After exploration, a compound of Guerbet alcohol and trimethylolpropane nonanoate is used as a cosolvent to replace the existing solubilizer for the product described in the present application. Guerbet alcohol and trimethylolpropane nonanoate work synergistically, so that the cosolvent has good compatibility with the water-soluble polyether and each component, and can effectively improve the low-temperature performance, stability, anti-wear performance and anti-rust performance of the product.

For example, the weight parts of the water-soluble polyether may be 80 parts, 81 parts, 82 parts, 83 parts, 84 parts, 85 parts, 86 parts, 87 parts, 88 parts, 89 parts, 90 parts, but the present disclosure is not limited thereto;

For example, the weight proportion of the extreme pressure anti-wear agent may be 1 part, 1.3 parts, 1.5 parts, 2 parts, 2.5 parts, 2.7 parts, 3 parts, 3.2 parts, 3.5 parts, 4 parts, 4.5 parts, 4.8 parts, or 5 parts; the present disclosure is not limited thereto;

For example, the weight portion of the rust inhibitor may be 0.5 parts, 0.6 parts, 0.7 parts, 0.8 parts, 0.9 parts, 1 parts, 1.1 parts, 1.2 parts, 1.3 parts, 1.4 parts, 1.5 parts; the present disclosure is not limited thereto;

For example, the weight parts of the co-solvent can be 5 parts, 5.2 parts, 5.6 parts, 6 parts, 6.5 parts, 7 parts, 7.3 parts, 7.7 parts, 8 parts, 8.2 parts, 8.5 parts, 9 parts, 9.5 parts, 9.8 parts, 10 parts; the present disclosure is not limited thereto;

For example, the weight parts of the antioxidant can be 1 part, 1.2 parts, 1.5 parts, 1.7 parts, 2 parts, 2.5 parts, 3 parts, 3.2 parts, 3.6 parts, 4 parts, 4.3 parts, 4.5 parts, 4.8 parts, 5 parts; the present disclosure is not limited thereto;

Illustratively, the weight parts of the metal corrosion inhibitor and the defoaming agent can be independently 0.01 part, 0.05 part, 0.1 part, 0.15 part, 0.2 part, 0.25 part, 0.3 part, 0.35 part, 0.4 part, 0.45 part, 0.5 part, 0.55 part, 0.6 part, 0.65 part, 0.7 part, 0.75 part, 0.8 part, 0.9 part, and 1 part; the present disclosure is not limited to this.

For example, the kinematic viscosity of the water-soluble polyether at 40°C is 300-600 mm ² /s, preferably 435-480 mm ² /s. In the present application, the water-soluble polyphenylene ether is Clariant D21/300, and the kinematic viscosity at 40°C is 458 mm ² /s.

Illustratively, the Guerbet alcohol is isooctadecyl alcohol.

In one embodiment, the mass ratio of the Guerbet alcohol to trimethylolpropane nonanoate is (4-6):(2-4); for example, it can be 4:2, 4:3, 4:4, 5:2, 5:3, 5:4, 6:2, 6:4, but is not limited to the listed values, and other unlisted values are also applicable within this range.

When the mass ratio of Guerbet alcohol to trimethylolpropane nonanoate is within the above mass ratio range, the solubility of extreme pressure anti-wear agents, rust inhibitors and metal corrosion inhibitors in water-soluble polyether can be further improved, so that the industrial gear oil has better low temperature performance, anti-wear performance and stability.

In one embodiment, the mass ratio of the co-solvent, the extreme pressure anti-wear agent and the rust inhibitor is co-solvent: extreme pressure anti-wear agent: rust inhibitor = (7-9): (2-4): 1; for example, it can be 7:2:1, 7:3:1, 7:4:1, 8:2:1, 8:3:1, 8:4:1, 9:2:1, 9:3:1, 9:4:1, but is not limited to the listed values, and other unlisted values are also applicable within this range.

When the mass ratio of the cosolvent, the extreme pressure anti-wear agent and the rust inhibitor is within the above mass ratio range, the obtained industrial gear oil has better anti-wear performance, low temperature performance and stability performance.

In one embodiment, the extreme pressure anti-wear agent is phosphate ester and phosphate ester amine salt.

Specifically, the mass ratio of the phosphate ester to the phosphate amine salt is preferably 1:1-6, more preferably 1:4-5. The present invention adopts phosphate ester and phosphate amine salt as extreme pressure anti-wear agents, which have a good positive synergistic effect, greatly improve the anti-wear performance of the product, and are conducive to solving the contradiction between the anti-wear and corrosion properties of the product.

Exemplarily, the phosphate ester is an alkylthiophosphate complex ester; and the phosphate amine salt is isooctyl acid phosphate octadecylamine.

In one embodiment, the rust inhibitor is at least one of sodium petroleum sulfonate, N-oleoylsarcosine octadecylamine, and alkenyl succinate.

Specifically, the rust inhibitor is N-oleoylsarcosine octadecylamine. The rust inhibitor can promote the industrial gear oil to form a lubricating film on the surface of the component, inhibiting the corrosion of water vapor, oxygen and other chemical components on the gear box components.

In one embodiment, the antioxidant is at least one of 2,6-di-tert-butyl-p-cresol, octylbutyldiphenylamine, octadecene phosphite, and dithiocarbamate derivatives.

The above antioxidants can enhance the antioxidant properties of industrial gear oil, prevent premature oxidation and decay, and extend the oil change cycle and service life of industrial gear oil.

In one embodiment, the metal corrosion inhibitor is at least one of a methylbenzotriazole derivative and benzotriazole.

The toluene triazole derivative is toluene triazole.

The above metal corrosion inhibitor can enhance the anti-corrosion protection of the rust inhibitor to the metal.

In one embodiment, the defoaming agent is at least one of dimethyl silicone oil and polyacrylate.

The defoaming agent used in the present disclosure can reduce the foam of the industrial gear oil, and avoid the dry friction phenomenon caused by the destruction of the oil film due to bubbles in the use of the industrial gear oil.

On the other hand, a method for preparing the water-soluble synthetic polyether industrial gear oil is provided, comprising the following steps: mixing the components uniformly according to a certain proportion to obtain the water-soluble synthetic polyether industrial gear oil.

Specifically, the preparation method of the water-soluble synthetic polyether industrial gear oil comprises the following steps:

(1) mixing a cosolvent, an extreme pressure anti-wear agent and a rust inhibitor uniformly at 50-60° C. to obtain a mixture A;

(2) Add antioxidant, metal corrosion inhibitor and water-soluble agent to mixture A, mix well, then add defoaming agent and mix well to obtain water-soluble synthetic polyether industrial gear oil.

Specifically, if the mixing temperature in step (1) is too low, the dissolution effect of the extreme pressure anti-wear agent and the rust inhibitor in the water-soluble polyether will be poor, thereby causing the overall performance of the water-soluble synthetic polyether industrial gear oil to decrease; if the mixing temperature is too high, the mixture A will decompose, causing the overall performance of the water-soluble synthetic polyether industrial gear oil to decrease.

The following examples are provided to facilitate understanding of the present disclosure. These examples are not provided to limit the scope of the claims.

The raw material information used in the examples and comparative examples of the present disclosure is as follows:

The water-soluble polyether was purchased from Clariant with the brand name D21/300 and a kinematic viscosity of 458 mm ² /s at 40°C.

Examples and Comparative Examples

The components of the water-soluble synthetic polyether industrial gear oils described in the examples and comparative examples are shown in Tables 1-2 below.

The preparation method of the water-soluble synthetic polyether industrial gear oil described in the embodiment and comparative example comprises the following steps:

(1) mixing a cosolvent, an extreme pressure anti-wear agent and a rust inhibitor uniformly at 50-60° C. to obtain a mixture A;

(2) Add an antioxidant, a metal corrosion inhibitor and a water-soluble polyether to mixture A, mix them evenly, and then add a defoaming agent and mix them evenly to obtain a water-soluble synthetic polyether type industrial gear oil.

Table 1

Table 2

Performance Testing

The water-soluble synthetic polyether industrial gear oils obtained in the examples and comparative examples were subjected to performance tests. The test results are shown in Table 3.

Table 3

It can be seen from the experimental data in Table 3 that the water-soluble synthetic polyether industrial gear oil disclosed in the present invention has excellent stability, low temperature performance, extreme pressure anti-wear performance and rust resistance.

Comparative Examples 3-6 show that when the mass ratio of Guerbet alcohol to trimethylolpropane nonanoate is (4-6):(2-4), the water-soluble synthetic polyether industrial gear oil has better overall performance.

By comparing Example 3 with Examples 7-9, it can be seen that when the mass ratio of the cosolvent, the extreme pressure anti-wear agent and the rust inhibitor is cosolvent: extreme pressure anti-wear agent: rust inhibitor = (7-9): (2-4): 1, the water-soluble synthetic polyether industrial gear oil has better overall performance.

By comparing Example 3 with Examples 10-12, it can be seen that when the extreme pressure anti-wear agent is phosphate ester and phosphate amine salt, the water-soluble synthetic polyether industrial gear oil has better overall performance.

By comparing Example 3 with Examples 13-14, it can be seen that when the rust inhibitor is N-oleoylsarcosine octadecylamine, the water-soluble synthetic polyether industrial gear oil has better overall performance.

By comparing Example 3 with Comparative Examples 1-3, it can be seen that there is a synergistic effect between Guerbet alcohol and trimethylolpropane nonanoate in the present disclosure, which effectively improves the low temperature performance and lubricity of the water-soluble synthetic polyether type industrial gear oil. When at least one of Guerbet alcohol and trimethylolpropane nonanoate is missing, the low temperature performance and lubricity of the obtained water-soluble synthetic polyether type industrial gear oil are significantly reduced.

Finally, it should be noted that the above embodiments are used to illustrate the technical solution of the present disclosure rather than to limit the protection scope of the present disclosure. Although the present disclosure has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present disclosure can be modified or replaced by equivalents without departing from the essence and scope of the technical solution of the present disclosure.

Claims (9)

1. A water-soluble synthetic polyether industrial gear oil, characterized in that it comprises the following components in parts by weight: 80-90 parts of water-soluble polyether, 1-5 parts of extreme pressure anti-wear agent, 0.5-1.5 parts of rust inhibitor, 1-5 parts of antioxidant, 5-10 parts of cosolvent, 0.01-1 parts of metal corrosion inhibitor, and 0.01-1 parts of defoaming agent; The extreme pressure anti-wear agent is at least one of dialkyl dithiophosphate zinc, phosphate ester, and phosphate ester amine salt; the co-solvent is Guerbet alcohol and trimethylolpropane nonanoate. 2. The water-soluble synthetic polyether industrial gear oil according to claim 1, characterized in that the mass ratio of the Guerbet alcohol to trimethylolpropane nonanoate is (4-6):(2-4). 3. The water-soluble synthetic polyether industrial gear oil according to claim 1, characterized in that the mass ratio of the cosolvent, the extreme pressure anti-wear agent and the rust inhibitor is cosolvent: extreme pressure anti-wear agent: rust inhibitor = (7-9): (2-4): 1. 4. The water-soluble synthetic polyether industrial gear oil according to claim 1, characterized in that the extreme pressure anti-wear agent is a phosphate ester and a phosphate amine salt. 5. The water-soluble synthetic polyether industrial gear oil according to claim 1, characterized in that the rust inhibitor is at least one of sodium petroleum sulfonate, N-oleoylsarcosine octadecylamine, and alkenyl succinate. 6. The water-soluble synthetic polyether industrial gear oil according to claim 1, characterized in that the antioxidant is at least one of 2,6-di-tert-butyl-p-cresol, octylbutyldiphenylamine, octadecene phosphite, and dithiocarbamate derivatives. 7. The water-soluble synthetic polyether industrial gear oil according to claim 1, characterized in that the metal corrosion inhibitor is at least one of a methylbenzotriazole derivative and benzotriazole. 8. The water-soluble synthetic polyether industrial gear oil according to claim 1, characterized in that the defoaming agent is at least one of dimethyl silicone oil and polyacrylate. 9. A method for preparing the water-soluble synthetic polyether industrial gear oil according to any one of claims 1 to 8, characterized in that it comprises the following steps: mixing the components uniformly in proportion to obtain the water-soluble synthetic polyether industrial gear oil.