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CN-121991750-A - High-temperature-resistant and coking-resistant synthetic ester chain oil and preparation method and application thereof

CN121991750ACN 121991750 ACN121991750 ACN 121991750ACN-121991750-A

Abstract

The application belongs to the technical field of chain lubricating oil, and in particular relates to high-temperature-resistant and coking-resistant synthetic ester type chain oil, and a preparation method and application thereof. According to the synthetic ester type chain oil, the specific double-quaternary tetrapentanol ester and the trimellitic acid ester are used as the synthetic ester base oil in a synergistic mode, and the synthetic ester type chain oil is optimally compounded with the extreme pressure antiwear agent, the antioxidant and the antirust agent, so that the synthetic ester type chain oil which is good in low-temperature fluidity, high in flash point, low in friction coefficient, small in abrasive spot diameter, low in corrosiveness, excellent in adhesive property, small in evaporation loss and free of coking at a high temperature of 300 ℃ is obtained under the condition that a viscosity index improver is not added by utilizing the synergistic effect among components, and the long-acting lubricating requirement under a continuous high-temperature environment is met.

Inventors

  • LU XIAOLI
  • HUANG XIAOHUA
  • KONG YINAN
  • JIN XIANHUA

Assignees

  • 浙江传化化学品有限公司

Dates

Publication Date
20260508
Application Date
20260105

Claims (10)

  1. 1. The high-temperature-resistant and coking-resistant synthetic ester chain oil is characterized by comprising synthetic ester base oil, an extreme pressure antiwear agent, an antioxidant and an antirust agent; The synthetic ester base oil consists of dipentaerythritol ester and trimellitic acid ester, wherein the hydroxyl value of the dipentaerythritol ester is less than 10mg KOH/g, the aniline point is less than 100 ℃, and the synthetic ester base oil is prepared by directly esterifying dipentaerythritol and C5-C10 fatty acid at 180-250 ℃ under the action of an acid catalyst, wherein the number of carbon atoms of an alkyl chain of the trimellitic acid ester is C8-C12; The mass percentage of the synthetic ester base oil in the chain oil is 90% -99%, and the mass ratio of the dipentaerythritol ester to the trimellitic acid ester is (0.5-6): 1.
  2. 2. The synthetic ester type chain oil according to claim 1 is characterized by comprising, by mass, 94-99 parts of synthetic ester base oil, 1-4 parts of extreme pressure antiwear agent, 0.2-2 parts of antioxidant and 0.05-2 parts of antirust agent.
  3. 3. The synthetic ester chain oil according to claim 1 or 2, wherein the extreme pressure antiwear agent is a phosphorus extreme pressure antiwear agent selected from one or more of alkyl phosphites, phosphate esters, ammonium thiophosphate salts.
  4. 4. The synthetic ester chain oil according to claim 1 or 2, wherein the antioxidant is an amine antioxidant and/or a phenolic antioxidant.
  5. 5. The synthetic ester chain oil according to claim 4, wherein the weight ratio of the amine antioxidant to the phenolic antioxidant is (1.2-3): 1.
  6. 6. The synthetic ester chain oil according to claim 1 or 2, wherein the rust inhibitor is selected from one or more of dibutyl methylene ester, olefin succinic acid monoester, phosphate ester, amide, benzotriazole derivatives.
  7. 7. A method for producing the synthetic ester-type chain oil according to any one of claims 1 to 6, comprising the steps of: and uniformly mixing the synthetic ester base oil, the antiwear agent, the antioxidant and the antirust agent according to the proportion under the heating condition to prepare the synthetic ester type chain oil.
  8. 8. The method according to claim 7, wherein the heating temperature is 90 ℃ to 100 ℃.
  9. 9. Use of the synthetic ester chain oil according to any one of claims 1 to 6 for lubrication of transmission chains of high temperature industrial equipment.
  10. 10. A chain lubricating oil suitable for use in textile heat setting machines, characterized in that it comprises a synthetic ester chain oil as claimed in any one of claims 1 to 6.

Description

High-temperature-resistant and coking-resistant synthetic ester chain oil and preparation method and application thereof Technical Field The application belongs to the technical field of chain lubricating oil, and in particular relates to high-temperature-resistant and coking-resistant synthetic ester type chain oil, and a preparation method and application thereof. Background In the industrial fields of textile printing and dyeing, metallurgy, glass manufacturing, ceramic sintering, food baking and the like, transmission devices such as conveying chains, oven chains, kiln car chains and the like are in extreme environments of high temperature, dust and chemical corrosion for a long time. Its operating temperature is generally above 200 ℃, locally even up to 300 ℃. Under such severe working conditions, the existing chain oil generally faces the problems of oxidation coking, high-temperature volatilization and lubrication film cracking, chain jamming, increased transmission resistance, aggravated abrasion and even jamming are easily caused, and electrode overload burning can be caused when the chain oil is severe. In addition, the adhesiveness of the existing chain oil is poor at high temperature, so that the oil is easy to drip, and a lasting oil film is difficult to form on the surface of the chain due to the fact that the permeability is too strong, so that the oil is difficult to achieve effective balance between quick penetration and long-acting adhesion. In order to improve the viscosity and adhesiveness of the oil, the traditional method usually adopts mineral oil and asphalt, soap base and other thickening agents for compounding, however, the formula oil is poor in stability at high temperature, and the coking and carbon deposition problems are outstanding. With the development of synthetic lubrication technology, synthetic base oils such as poly alpha-olefin, ester oil, polyether and the like gradually replace mineral oil, and the high-temperature performance of the chain oil is remarkably improved. However, in order to achieve both permeability and adhesiveness, the conventional synthetic ester type chain oil generally needs to be added with viscosity index improvers such as polyisobutylene and polymethacrylate, and the additives are more difficult to volatilize at high temperature and are easy to accumulate on the surface of the chain continuously to form coking and jelly, and the chain transmission is hindered, so that the long-acting lubricating requirement under the continuous high-temperature environment is difficult to meet. Therefore, there is a need to develop a synthetic ester-type chain oil capable of effective lubrication at high temperatures of 300 ℃, having good oil film retention, and having a low tendency to coke. Disclosure of Invention Aiming at the defects of the prior art, the application aims to provide high-temperature-resistant and coking-resistant synthetic ester type chain oil, and a preparation method and application thereof, and aims to solve the problems that the existing chain oil is commonly subjected to oxidation coking, evaporation loss, oil film rupture and difficult to balance permeability and adhesiveness at high temperature, and chain clamping stagnation, abnormal abrasion and even motor burnout are easy to cause. In order to achieve the aim, in a first aspect, the application provides high-temperature-resistant and coking-resistant synthetic ester chain oil, which consists of synthetic ester base oil, extreme pressure antiwear agent, antioxidant and antirust agent; the synthetic ester base oil consists of dipentaerythritol ester and trimellitic acid ester, wherein the hydroxyl value of the dipentaerythritol ester is less than 10mg KOH/g, the aniline point is less than 100 ℃, and the synthetic ester base oil is prepared by directly esterifying dipentaerythritol and C5-C10 fatty acid at 180-250 ℃ under the action of an acid catalyst, wherein the number of carbon atoms of an alkyl chain of the trimellitic acid ester is C8-C12; the mass percentage of the synthetic ester base oil in the chain oil is 90% -99%, and the mass ratio of the dipentaerythritol ester to the trimellitic acid ester is (0.5-6): 1. The synthetic ester type chain oil is composed of 94-99 parts of synthetic ester base oil, 1-4 parts of extreme pressure antiwear agent, 0.2-2 parts of antioxidant and 0.05-2 parts of antirust agent according to parts by weight. Preferably, the mass ratio of the dipentaerythritol ester to the trimellitate is (40-85): 14-60. Preferably, the extreme pressure antiwear agent is a phosphorus extreme pressure antiwear agent, and is selected from one or more of alkyl phosphite, phosphate and phosphorothioate ammonium salt. Preferably, the antioxidant is an amine antioxidant and/or a phenolic antioxidant. Preferably, the weight ratio of the amine antioxidant to the phenolic antioxidant is (1.2-3): 1. Preferably, the rust inhibitor is selected from one or more of dibutyl methyle