News Details
High temperature resistant antioxidant
2018-1-1 11:45:49
High temperature resistant antioxidant
Because of the improvement of the mechanical design technology, the engine will develop towards high temperature, high speed and high output power. Therefore, relying solely on the addition of ZDDP anti oxidant and anti corrosion agent has been unable to meet the requirements of high temperature oxidation resistance of oil products. New high temperature resistant antioxidants need to be developed.
Amine type has higher thermal decomposition temperature due to the antioxidant capacity, increase control of sludge formation and control excellent viscosity, can be used as high temperature resistant antioxidant; carbamate (ester) compounds, the decomposition temperature has a high heat, but also has a good antioxidant effect at high temperature.
Boric acid ester compounds and alkali metal salts can greatly improve the antioxidant capacity of oil products. These compounds will become an important direction for future development of high temperature resistant antioxidants.
The oxidation stability of the steam turbine oil and the antioxidant can be effectively improved. The phenolic antioxidant (T501) is a commonly used antioxidant for turbogenerator oil. It has the advantages of good antioxidant properties, no discoloration of oil products and small toxicity. But used alone, the antioxidant cycle is short, and the antioxidant effect is quickly lost in the later period of use.
An amine type antioxidant has a high thermal decomposition temperature and a good effect on inhibiting the increase of acid value.
However, the amine type antioxidant can easily discolor the oil and produce precipitate. In order to get good oxidation stability, produce steam turbine oil and less sediment oxidation, a more reasonable approach is based on a 2,6 with antioxidant butylated cresol, and then use a small amount of amine antioxidant compound.
Amine antioxidant is a variety of antioxidant (hindered amines, or HALS.) antioxidants. In order to prevent or inhibit chain reaction and chain growth reaction by capturing peroxy radicals, the free radical chain reaction can be terminated, so as to prevent oxidation.
Hindered amine is a relatively new anti ultraviolet / anti-aging agent, because the aging of polymers is due to UV induced photooxidation and redox reaction, resulting in the destruction of polymer structures by free radicals, and ultimately the degradation of polymers. This process is called aging.
The synergistic use of hindered amines with other antiaging agents, such as benzolazole, two benzophenone, and so on, has a better effect than being used alone. There are two naphthylamine, aniline, two of benzene amine etc..
Triphenyl phosphite (TPPi antioxidants, stabilizer) is the main raw materials of phenol, phosphorus oxychloride, phosphorus trichloride, phosphorus oxychloride, phosphorus trichloride belong to highly toxic chemicals, state control chemicals. Through raw material phenol, triclosan phosphorous and trichloride phosphorus, the direct method of trichloro phosphorus is used to direct (also known as thermal) and the indirect method of trichloride phosphorus (also known as cold method).
According to the relevant state regulations, tppi is currently exported to 9 kinds of dangerous goods.
Triphenyl phosphite (TPPi antioxidants, stabilizer) is mainly used in PVC, polyethylene, polypropylene, polystyrene, polyester, abs resin, epoxy resin, synthetic rubber antioxidant stabilizer, used in polyvinyl chloride (PVC) products as a chelating agent.
Alkali metal refers to six metal elements in the periodic table group IA: lithium, sodium and potassium, rubidium, cesium, francium.
According to the latest IUPAC regulation, the alkali metal belongs to the IA element in the periodic table of the element. The alkali metal has an outermost electron belonging to the s orbit, so this family belongs to the S region of the periodic table of elements. The chemical properties of alkali metals show very obvious homologous behavior and are the best examples of the periodicity of the elements. Hydrogen (H) belongs to the first family in nominal terms, but its chemical properties are far apart from the alkali metals, so they are usually not considered to be alkali metals.
The study of borate as a lubricating oil additive began in 1940s. The primary purpose of its initial application is to improve the thermal oxidation stability of oil. In 1960s, boric acid esters were used as antifriction and antiwear additives. The results showed that the addition of boric acid to base oil increased the friction coefficient of 5%~50% by 0.5%~4.0%. The initial synthesis of borate additive molecular chain alkyl is usually composed of only two elements of C and H, and then the ester group is introduced into the alkyl group. In recent years, in order to meet the needs of energy saving and environmental protection, researchers have introduced active elements such as S, P and N into borate esters. Various borate additives with different molecular structures and tribological properties have been reported.
Borate ester additive that does not contain other active elements. The study of such compounds as lubricant additives started earlier. In addition to B elements, the molecules contained no other active elements, so their functions were relatively single, which was difficult to meet the needs of increasingly complex working conditions, and their applications were limited.
Boric acid ester containing hydroxyl is a reaction product of boric acid and long chain epoxides (more than 8 C), and it has many functions, such as antifriction, antiwear and antirust.
After the hydrolysis of 1,2- epoxy sixteen alkane to the ester of the reaction with boric acid, it is the 1 excellent antifriction agent. Steric phenol and hydroxyl ester react with boric acid to produce 1 kinds of boric acid ester, which have many functions as antioxidant, corrosion resistant and anti wear.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
http://www.yaruichem.com
Because of the improvement of the mechanical design technology, the engine will develop towards high temperature, high speed and high output power. Therefore, relying solely on the addition of ZDDP anti oxidant and anti corrosion agent has been unable to meet the requirements of high temperature oxidation resistance of oil products. New high temperature resistant antioxidants need to be developed.
Amine type has higher thermal decomposition temperature due to the antioxidant capacity, increase control of sludge formation and control excellent viscosity, can be used as high temperature resistant antioxidant; carbamate (ester) compounds, the decomposition temperature has a high heat, but also has a good antioxidant effect at high temperature.
Boric acid ester compounds and alkali metal salts can greatly improve the antioxidant capacity of oil products. These compounds will become an important direction for future development of high temperature resistant antioxidants.
The oxidation stability of the steam turbine oil and the antioxidant can be effectively improved. The phenolic antioxidant (T501) is a commonly used antioxidant for turbogenerator oil. It has the advantages of good antioxidant properties, no discoloration of oil products and small toxicity. But used alone, the antioxidant cycle is short, and the antioxidant effect is quickly lost in the later period of use.
An amine type antioxidant has a high thermal decomposition temperature and a good effect on inhibiting the increase of acid value.
However, the amine type antioxidant can easily discolor the oil and produce precipitate. In order to get good oxidation stability, produce steam turbine oil and less sediment oxidation, a more reasonable approach is based on a 2,6 with antioxidant butylated cresol, and then use a small amount of amine antioxidant compound.
Amine antioxidant is a variety of antioxidant (hindered amines, or HALS.) antioxidants. In order to prevent or inhibit chain reaction and chain growth reaction by capturing peroxy radicals, the free radical chain reaction can be terminated, so as to prevent oxidation.
Hindered amine is a relatively new anti ultraviolet / anti-aging agent, because the aging of polymers is due to UV induced photooxidation and redox reaction, resulting in the destruction of polymer structures by free radicals, and ultimately the degradation of polymers. This process is called aging.
The synergistic use of hindered amines with other antiaging agents, such as benzolazole, two benzophenone, and so on, has a better effect than being used alone. There are two naphthylamine, aniline, two of benzene amine etc..
Triphenyl phosphite (TPPi antioxidants, stabilizer) is the main raw materials of phenol, phosphorus oxychloride, phosphorus trichloride, phosphorus oxychloride, phosphorus trichloride belong to highly toxic chemicals, state control chemicals. Through raw material phenol, triclosan phosphorous and trichloride phosphorus, the direct method of trichloro phosphorus is used to direct (also known as thermal) and the indirect method of trichloride phosphorus (also known as cold method).
According to the relevant state regulations, tppi is currently exported to 9 kinds of dangerous goods.
Triphenyl phosphite (TPPi antioxidants, stabilizer) is mainly used in PVC, polyethylene, polypropylene, polystyrene, polyester, abs resin, epoxy resin, synthetic rubber antioxidant stabilizer, used in polyvinyl chloride (PVC) products as a chelating agent.
Alkali metal refers to six metal elements in the periodic table group IA: lithium, sodium and potassium, rubidium, cesium, francium.
According to the latest IUPAC regulation, the alkali metal belongs to the IA element in the periodic table of the element. The alkali metal has an outermost electron belonging to the s orbit, so this family belongs to the S region of the periodic table of elements. The chemical properties of alkali metals show very obvious homologous behavior and are the best examples of the periodicity of the elements. Hydrogen (H) belongs to the first family in nominal terms, but its chemical properties are far apart from the alkali metals, so they are usually not considered to be alkali metals.
The study of borate as a lubricating oil additive began in 1940s. The primary purpose of its initial application is to improve the thermal oxidation stability of oil. In 1960s, boric acid esters were used as antifriction and antiwear additives. The results showed that the addition of boric acid to base oil increased the friction coefficient of 5%~50% by 0.5%~4.0%. The initial synthesis of borate additive molecular chain alkyl is usually composed of only two elements of C and H, and then the ester group is introduced into the alkyl group. In recent years, in order to meet the needs of energy saving and environmental protection, researchers have introduced active elements such as S, P and N into borate esters. Various borate additives with different molecular structures and tribological properties have been reported.
Borate ester additive that does not contain other active elements. The study of such compounds as lubricant additives started earlier. In addition to B elements, the molecules contained no other active elements, so their functions were relatively single, which was difficult to meet the needs of increasingly complex working conditions, and their applications were limited.
Boric acid ester containing hydroxyl is a reaction product of boric acid and long chain epoxides (more than 8 C), and it has many functions, such as antifriction, antiwear and antirust.
After the hydrolysis of 1,2- epoxy sixteen alkane to the ester of the reaction with boric acid, it is the 1 excellent antifriction agent. Steric phenol and hydroxyl ester react with boric acid to produce 1 kinds of boric acid ester, which have many functions as antioxidant, corrosion resistant and anti wear.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
http://www.yaruichem.com
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