阅读说明：本技术 一种合成酯型抗燃液压油 (Synthetic ester type flame-retardant hydraulic oil ) 是由 张继腾 吕冀川 于 2019-09-09 设计创作，主要内容包括：本发明公开了一种合成酯型抗燃液压油,包括下列比例的成分：饱和多元醇酯类基础油98.6～99％、硫化的二叔丁基苯酚0.2～0.5％、苯三唑十八胺盐0.1～0.25％、4-二异辛基二苯胺0.2～0.4％、硫代磷酸酯铵盐0.25～0.4％、添加剂0.17～0.34％,合成酯型抗燃液压油本发明设计合理,抗氧化性稳定,使用寿命长,换油周期短,降低了使用成本,基础油的辅助剂性能稳定和抗磨效果好,同时减少了添加剂的使用,在一定程度减少了抗燃液压油灰分、提高了降解率,基础油中分子结构不对称性更高,油品拥有更低的倾点,同时合成酯型抗燃液压油抗磨能力高,在高速、高压的环境中不易使器件遭到磨损,降低了器件的维护成本。(The invention discloses synthetic ester type flame-retardant hydraulic oil which comprises the following components in parts by weight: 98.6-99% of saturated polyol ester base oil, 0.2-0.5% of vulcanized di-tert-butylphenol, 0.1-0.25% of benzotriazole octadecylamine salt, 0.2-0.4% of 4-diisooctyl diphenylamine, 0.25-0.4% of thiophosphate ammonium salt and 0.17-0.34% of additive.)

1. A synthetic ester type flame-retardant hydraulic oil is characterized in that: which comprises the following components in percentage by weight:

98.6-99.3% of saturated polyol ester base oil, 0.15-0.5% of vulcanized di-tert-butylphenol, 0.1-0.25% of benzotriazole octadecylamine salt, 0.15-0.4% of 4-diisooctyl diphenylamine, 0.25-0.4% of thiophosphate ammonium salt and 0.17-0.34% of additive.

2. The synthetic ester type flame-retardant hydraulic oil as claimed in claim 1, wherein: comprises the following components: 98.8-99% of saturated polyol ester base oil, 0.2-0.35% of vulcanized di-tert-butylphenol, 0.1-0.25% of benzotriazole octadecylamine salt, 0.2-0.3% of 4-diisooctyl diphenylamine, 0.25-0.4% of thiophosphate ammonium salt and 0.2-0.25% of additive.

3. The synthetic ester type flame-retardant hydraulic oil according to claim 1 or 2, characterized in that: the saturated polyol ester base oil is a mixed solution of trimethylolpropane caprylic decanoate and pentaerythritol isostearic acid ester.

4. The synthetic ester type flame-retardant hydraulic oil as claimed in claim 1 or 2, wherein the additive comprises 0.08-0.9% by mass of a main antioxidant N-phenyl-alpha-naphthylamine, 0.02-0.1% by mass of an auxiliary antioxidant pentaerythritol tetraester (3-lauryl thiopropionate) and 0.1-0.35% by mass of an extreme pressure antiwear agent tricresyl phosphate.

5. The preparation method of the synthetic ester type flame-retardant hydraulic oil according to claim 1, characterized in that: the weight ratio of the thiophosphate ammonium salt, the vulcanized di-tert-butylphenol and the 4-diisooctyl diphenylamine is 6: 2.

6. The preparation method of the synthetic ester type flame-retardant hydraulic oil according to claim 4, characterized in that: the mass ratio of pentaerythritol isostearic acid ester to trimethylolpropane caprylic decanoate is 0.3-20: 1.

Technical Field

The invention relates to the technical field of hydraulic systems, in particular to synthetic ester type flame-retardant hydraulic oil.

Background

The hydraulic oil is a hydraulic medium used by a hydraulic system utilizing hydraulic pressure energy, plays roles of energy transfer, system lubrication, corrosion prevention, rust prevention, cooling and the like in the hydraulic system, and provides various requirements for the hydraulic oil due to continuous rising of the operating pressure of a vane pump and a plunger pump and abrasion of a friction pair, and the hydraulic oil is also a large family in lubricating oil, and has increasingly strict requirements for the operating condition of equipment and also has continuously improved requirements for fire prevention, rust prevention and environmental protection. The existing flame-retardant hydraulic oil on the market mainly comprises water glycol type, synthetic ester type and phosphate type hydraulic oil, wherein the water glycol hydraulic oil contains a large amount of water, so that the use temperature of the hydraulic oil is greatly limited (the temperature can not exceed 100 ℃), and the problems of poor lubricity and easy rusting of equipment exist. The phosphate type hydraulic oil is very expensive and pollutes the environment after being used. Therefore, synthetic ester type flame-retardant hydraulic oil is increasingly accepted by more users in the market. However, the synthetic ester type flame-retardant hydraulic oil in the market at present is mainly an esterified product of polyhydric alcohol and oleic acid, namely polyhydric alcohol unsaturated fatty acid ester, the oxidation resistance of an oil product is low, the oil change period is short, and the synthetic ester type flame-retardant hydraulic oil contains more additives, so that the flame-retardant hydraulic oil has high ash content, low degradation rate and serious environmental pollution.

Disclosure of Invention

The invention aims to provide synthetic ester type flame-retardant hydraulic oil and a preparation method thereof so as to solve the problems in the background technology.

In order to achieve the purpose, the invention provides the following technical scheme: comprises the following components in percentage by weight:

98.6-99.3% of saturated polyol ester base oil, 0.15-0.5% of vulcanized di-tert-butylphenol, 0.1-0.25% of benzotriazole octadecylamine salt, 0.15-0.4% of 4-diisooctyl diphenylamine, 0.25-0.4% of thiophosphate ammonium salt and 0.17-0.34% of additive.

Further, the synthetic ester type flame-retardant hydraulic oil comprises the following components: 98.8-99% of saturated polyol ester base oil, 0.2-0.35% of vulcanized di-tert-butylphenol, 0.1-0.25% of benzotriazole octadecylamine salt, 0.2-0.3% of 4-diisooctyl diphenylamine, 0.25-0.4% of thiophosphate ammonium salt and 0.2-0.25% of additive.

By adopting the technical scheme, the total additive amount of the additive and the auxiliary agent in the synthetic ester type flame-retardant hydraulic oil is only 0.7-1.2% of the total oil by mass percent, so that the ash content of the flame-retardant hydraulic oil is reduced to a certain extent, the degradation rate is improved, and the environment is protected

Further, the saturated polyol ester base oil is a mixed solution of trimethylolpropane octadecanoate and pentaerythritol isostearate.

By adopting the technical scheme, the synthetic ester type flame-retardant hydraulic oil has no group of' -C-, greatly improves the oxidation resistance stability of molecules, and prolongs the service life, thereby prolonging the oil change period and reducing the use cost.

Further, the additive of the saturated polyol ester base oil comprises 0.08-0.9% of main antioxidant N-phenyl-alpha-naphthylamine, 0.02-0.1% of auxiliary antioxidant pentaerythritol tetra (3-lauryl thiopropionate) and 0.1-0.35% of extreme pressure antiwear additive tricresyl phosphate in percentage by mass of the total oil.

By adopting the technical scheme, the synthetic ester type flame-retardant hydraulic oil has high abrasion resistance, is not easy to wear in a high-speed and high-pressure environment, and reduces the maintenance cost of the device.

Further, it is characterized in that: the weight ratio of the thiophosphate ammonium salt, the vulcanized di-tert-butylphenol and the 4-diisooctyl diphenylamine is 6: 2.

By adopting the technical scheme, the content of the extreme pressure antiwear auxiliary agent in the synthetic ester type flame-retardant hydraulic oil is increased, so that the antiwear performance of the hydraulic oil is further improved.

Furthermore, the mass ratio of pentaerythritol isostearic acid ester to trimethylolpropane caprylic decanoate is 0.3-20: 1.

By adopting the technical scheme, the molecular structure in the base oil in the synthetic ester type flame-retardant hydraulic oil is more asymmetric, so that the pour point of the synthetic ester type flame-retardant hydraulic oil is reduced, and the flash point of the synthetic ester type flame-retardant hydraulic oil is also improved.

Compared with the prior art, the invention has the beneficial effects that: (1) the mixture of pentaerythritol isostearic acid ester and trimethylolpropane caprylic decanoate is a base oil saturated polyol ester molecular structure without a group of '-C ═ C-' so that the antioxidant stability of the molecules is greatly improved, the service life is long, the oil change period is prolonged, and the use cost is reduced. (2) The auxiliary agent of the base oil has stable performance and good anti-wear effect, and simultaneously reduces the use of the additive, so that the total addition amount of the additive and the auxiliary agent is only 1.0-1.4% of the total oil by mass percent, the ash content of the anti-combustion hydraulic oil is reduced to a certain extent, the degradation rate is improved, and the environment is protected. (3) The asymmetry of the molecular structure in the base oil is higher, the oil product has lower pour point, and meanwhile, the synthetic ester type flame-resistant hydraulic oil has high wear resistance, so that the device is not easily abraded in a high-speed and high-pressure environment, and the maintenance cost of the device is reduced.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and 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.