News Details
Antioxidant use
2018-1-10 11:30:02
Antioxidant use
Substances that delay or prevent oxidation or automatic oxidation are called antioxidants, which delay the deterioration of materials, products and supplies in storage and use. The general dosage is small, most is the material with reduction performance. The general requirement of antioxidant is small dosage, high efficiency, low price and no adverse consequences.
Antioxidants are widely used in food, feed, grease, plastic, rubber, fiber etc. Antioxidant is an important food additive, which can prevent oxidation and spoilage of food ingredients and improve the stability and storage period of food. Food antioxidant purpose mainly is to prevent the oxidation of grease and fat food rich blessings, prevent food fade, Browning, and vitamins are destroyed, such as on edible oils, rich butter cookies, breakfast cereal, soup powder, instant noodles, frozen or dried fish, shellfish, etc.
Antioxidants are divided into oil solubility and water - soluble. At present, the total number of antioxidants used in each country is about 30. International has the widespread use of dibutyl hydroxy toluene (butylated hydroxytoluene), tertiary butyl hydroxy anisol (BHA), gallic acid ester C, tertiary butyl hydroquinone (TBHQ), vitamin E, vitamin C, etc.
China in recent years the development of tea polyphenols is a kind of tea extract, is better than that of BHA, butylated hydroxytoluene, VE antioxidant effect, both antibacterial and prevent fading effect, safe and non-toxic, China approved in 1990, is now vigorously expand applications. In addition, China from licorice extract extracted or glycyrrhizic acid from licorice residue extracted into a "licorice antioxidants", has a good antioxidant effect, and resistance to light and oxygen, security, non-toxic, China has been officially approved for use in 1991.
The use of antioxidants also includes rubber and plastics. Most macromolecular materials may react with oxygen, leading to degradation or crosslinking, especially in hot processing and sunlight. Antioxidants can delay the oxidation process of the polymer materials, ensuring that they can be processed smoothly and prolong the service life. In the rubber industry, antioxidants are known as anti-aging agents.
According to the mechanism of action, the antioxidants have two types: free radical inhibitor and peroxide decomposition agent. Free radical inhibitors are also known as main antioxidants, including amines and phenols. The amine antioxidant is almost a derivative of the aromatic secondary amine, which is mainly secondary to secondary amine, phenylenediamine and ketamine and aldol. Most of them have good anti-oxygen efficiency, but they are heavy pollution, mainly used in rubber industry. Phenolic antioxidants are mainly blocked phenols, which are generally less effective than amines, but are not polluting, mainly used in plastics and light-colored rubber products.
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.
Peroxide decomposers are also known as adjuvant antioxidants, which are mainly dipropionate (such as DLTP, DSTP) and thioesters (such as TPP, TNP, ODP). They are mainly used in polyolefin and are used with phenolic antioxidants to produce synergistic effect.
The antioxidants also include copper inhibitors (heavy metal passivating agents) and ozonizers. Copper inhibitors can inhibit the catalytic effect of heavy metal ions on polymer oxidation, which is mostly the derivative of hydrazine, oxime and aldol condensation. They are mainly used in cable and polymer materials containing mineral filler.
Antioxidants are also used in oils, and the antioxidants are generally divided into:
It is mainly used in internal combustion engine oil, which can prevent the corrosion of crankcase bearing. It is widely used for zinc dialkyl dithiophosphate, which is also a kind of effective extreme pressure antiwear agent, which is used in industrial lubricating oil such as gear oil and anti-wear hydraulic oil.
In addition, there are mainly screened phenols (e.g., 2, 6-ditert-butyl) and aromatic amines. The former is mainly used for industrial lubricants such as turbine oil and hydraulic oil; The latter is used more in synthetic lubricating oil. The effect of antioxidants in oil is to delay the oxidation of oil and prolong the life of oil.
Dust-free and specialized. Antioxidants are mostly powder goods, as people to the requirement of increasing the working environment, aggregate type antioxidant began to appear, this not only improved the working environment of workers, also makes people can accurately measuring the amount of antioxidants, and antioxidants in polymer distribution more uniform, help to improve the overall stability of the product.
The compound products have the characteristics of short development cycle, good effect, good comprehensive performance, and full synergistic effect of various additives, so as to facilitate user's use. The compound antioxidant Naugard900 series has the characteristics of low volatility and no precipitation. The antioxidant CyanoxXS4 is a compound system containing hindered phenol and phosphatide, which is used to enhance the processing performance and long-term stability of polyolefin.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
http://www.yaruichem.com
Substances that delay or prevent oxidation or automatic oxidation are called antioxidants, which delay the deterioration of materials, products and supplies in storage and use. The general dosage is small, most is the material with reduction performance. The general requirement of antioxidant is small dosage, high efficiency, low price and no adverse consequences.
Antioxidants are widely used in food, feed, grease, plastic, rubber, fiber etc. Antioxidant is an important food additive, which can prevent oxidation and spoilage of food ingredients and improve the stability and storage period of food. Food antioxidant purpose mainly is to prevent the oxidation of grease and fat food rich blessings, prevent food fade, Browning, and vitamins are destroyed, such as on edible oils, rich butter cookies, breakfast cereal, soup powder, instant noodles, frozen or dried fish, shellfish, etc.
Antioxidants are divided into oil solubility and water - soluble. At present, the total number of antioxidants used in each country is about 30. International has the widespread use of dibutyl hydroxy toluene (butylated hydroxytoluene), tertiary butyl hydroxy anisol (BHA), gallic acid ester C, tertiary butyl hydroquinone (TBHQ), vitamin E, vitamin C, etc.
China in recent years the development of tea polyphenols is a kind of tea extract, is better than that of BHA, butylated hydroxytoluene, VE antioxidant effect, both antibacterial and prevent fading effect, safe and non-toxic, China approved in 1990, is now vigorously expand applications. In addition, China from licorice extract extracted or glycyrrhizic acid from licorice residue extracted into a "licorice antioxidants", has a good antioxidant effect, and resistance to light and oxygen, security, non-toxic, China has been officially approved for use in 1991.
The use of antioxidants also includes rubber and plastics. Most macromolecular materials may react with oxygen, leading to degradation or crosslinking, especially in hot processing and sunlight. Antioxidants can delay the oxidation process of the polymer materials, ensuring that they can be processed smoothly and prolong the service life. In the rubber industry, antioxidants are known as anti-aging agents.
According to the mechanism of action, the antioxidants have two types: free radical inhibitor and peroxide decomposition agent. Free radical inhibitors are also known as main antioxidants, including amines and phenols. The amine antioxidant is almost a derivative of the aromatic secondary amine, which is mainly secondary to secondary amine, phenylenediamine and ketamine and aldol. Most of them have good anti-oxygen efficiency, but they are heavy pollution, mainly used in rubber industry. Phenolic antioxidants are mainly blocked phenols, which are generally less effective than amines, but are not polluting, mainly used in plastics and light-colored rubber products.
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.
Peroxide decomposers are also known as adjuvant antioxidants, which are mainly dipropionate (such as DLTP, DSTP) and thioesters (such as TPP, TNP, ODP). They are mainly used in polyolefin and are used with phenolic antioxidants to produce synergistic effect.
The antioxidants also include copper inhibitors (heavy metal passivating agents) and ozonizers. Copper inhibitors can inhibit the catalytic effect of heavy metal ions on polymer oxidation, which is mostly the derivative of hydrazine, oxime and aldol condensation. They are mainly used in cable and polymer materials containing mineral filler.
Antioxidants are also used in oils, and the antioxidants are generally divided into:
It is mainly used in internal combustion engine oil, which can prevent the corrosion of crankcase bearing. It is widely used for zinc dialkyl dithiophosphate, which is also a kind of effective extreme pressure antiwear agent, which is used in industrial lubricating oil such as gear oil and anti-wear hydraulic oil.
In addition, there are mainly screened phenols (e.g., 2, 6-ditert-butyl) and aromatic amines. The former is mainly used for industrial lubricants such as turbine oil and hydraulic oil; The latter is used more in synthetic lubricating oil. The effect of antioxidants in oil is to delay the oxidation of oil and prolong the life of oil.
Dust-free and specialized. Antioxidants are mostly powder goods, as people to the requirement of increasing the working environment, aggregate type antioxidant began to appear, this not only improved the working environment of workers, also makes people can accurately measuring the amount of antioxidants, and antioxidants in polymer distribution more uniform, help to improve the overall stability of the product.
The compound products have the characteristics of short development cycle, good effect, good comprehensive performance, and full synergistic effect of various additives, so as to facilitate user's use. The compound antioxidant Naugard900 series has the characteristics of low volatility and no precipitation. The antioxidant CyanoxXS4 is a compound system containing hindered phenol and phosphatide, which is used to enhance the processing performance and long-term stability of polyolefin.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
http://www.yaruichem.com
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