News Details
Natural nontoxic antioxidant
2018-1-1 11:45:46
Natural nontoxic antioxidant
Along with the people to the environmental protection and safety requirements more and more high, people on the safety of plastic products for food, medicine and feed packaging put forward higher requirements, especially in recent years, BHT suspected carcinogenic, as safe and effective measures, high molecular weight hindered phenol on the one hand, high heat resistance in the continuous development and Application on the other hand, non-toxic natural antioxidant varieties into practice application, the most representative natural non-toxic antioxidants VE, VE active ingredient is alpha tocopherol (ATP), ATP not only showed high antioxidant activity, but also can eliminate or reduce the peculiar smell of polypropylene in the packaging material, so the plastic packaging industry especially food and pharmaceutical manufacturers expressed a great interest.
Although the price of natural non-toxic antioxidant VE is 3~4 times higher than that of hindered phenol such as Irganox and 1076, the actual cost is lower than 40% of the corresponding phenolic antioxidants, which has the potential of substitution. The antioxidants, such as VE and oophosphate, not only have good antioxidation, but also have high safety and non-toxic side effects.
Can be used to replace the toxic side effects of the currently widely used tert Ding Ji hydroxyanisole (BHA), 2, 6- di Ding Ji (BHT) and p-cresol gallate (PG) and other chemical antioxidant is represent the general trend. Based on VE, solid composite "green" varieties, which are combined with phosphite, glycerol, polyethylene glycol and high porosity resin, have good prospects for development.
Vitamin E is also known as vitamin E. It is also known as tocopherol or PIH. It's one of the most important antioxidants. Soluble in organic solvents such as fat and ethanol, it is insoluble in water, stable in heat and acid, unstable in alkali, sensitive to oxygen and insensitive to heat, but vitamin E activity is reduced significantly during frying. Are there in the cooking oil, fruits, vegetables and grain. Vitamin E is a fat soluble vitamin with 8 forms. It is often used in cream and lotion, because people believe that vitamin E can promote skin healing and scar formation after being injured by burns.
Natural vitamin E (Vitamin E) is a fat soluble vitamin, also known as tocopherol, is one of the most important antioxidants. Soluble in organic solvents such as fat and ethanol, it is insoluble in water, stable in heat and acid, unstable in alkali, sensitive to oxygen and insensitive to heat, but vitamin E activity is reduced significantly during frying. Tocopherol can promote hormone secretion, make sperm motility and increase in the number; the women's estrogen levels, improve fertility, prevention of abortion, but also has good curative effect for the prevention and treatment of male infertility, burns, frostbite, capillary hemorrhage, climacteric syndrome, beauty and other aspects. In recent years, vitamin E has also been found to inhibit the reaction of peroxide in the crystalline body of the eye, dilatation of the end of the blood vessels and the improvement of blood circulation.
Triphenyl phosphite (antioxidant, stabilizer TPPi) production process
1. Phosphorus oxychloride as the direct method (also called thermal method) phenol with pyridine and anhydrous benzene as solvent, in no more than 10 ℃ temperature, slowly add oxygen phosphorus chloride, then under reflux temperature, the reaction of 3 ~ 4 h. After cooling to room temperature, the reactants are washed by water to recycle pyridine. After centrifugal dehydration, the reagents are dehydrated with dried sodium sulfate, which is filtered to remove sodium sulfate. The first atmospheric distillation recovery of benzene, vacuum distillation, collected 243 ~ 245 ℃ (1.47 kPa) fraction, by cooling, crystallization, crushing is the finished product.
2. After phenol melting, stirring under add phosphorus trichloride under 25 ℃, Triphenyl phosphite is generated; Then heat up to 70 ℃ ventilation with chlorine gas, generated two chlorinated triphenyl phosphate; Again at 50 ℃ water hydrolysis, triphenyl phosphate. The hydrolysate with 5% soda solution for neutralization, water washing, the evaporation and vacuum distillation, collected 243 ~ 245 ℃ (1.47 kPa) fractions, cooling, crystallization, crushing, packaging is the finished product.
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.
Vitamin E rich foods are: fruits and vegetables, nuts, lean meat, milk, eggs, press plant oil, etc. Fruits and vegetables include gooseberry, spinach, cabbage, vegetable plug, kale, lettuce, yam, sweet potato. Nuts include almonds, hazelnuts and walnuts. The press plant oil includes sunflower seeds, sesame seeds, corn, olives, peanuts, and Camellia. In addition, safflower, soybean, cottonseed, wheat germ and cod liver oil have a certain content of vitamin E, which is the most abundant in wheat germ.
Alias: tocopherol; vitamin E; (2) -[2R* (4R*, 8R*)]-3,4- two -2,5,7,8- four -2- (4,8,12- methyl hydrogen three methyl thirteen alkyl) -6- chroman alcohols; tocopherol (vitamin E); natural vitamin E
Tocopherol has four main derivatives, which are divided into four kinds, namely, alpha, beta, gamma and delta according to the methyl position. The activity of three alkenols related to tocopherol in the substituent group is certain, but the activity of tocopherol can be significantly reduced.
Vitamin E can promote the metabolism of the body, enhance the endurance of the body and improve the immunity. In addition, vitamin E is an efficient antioxidant, which protects biofilms from damage by peroxide, and improves skin blood circulation, enhances skin cell vitality and delaying senility. The lack of it will result in adverse consequences such as dry skin, rough skin and excessive aging.
The crystallinity of polypropylene is high and the structure is regular, so it has excellent mechanical properties. The absolute value of mechanical properties of polypropylene is higher than that of polyethylene, but it still belongs to a low variety in plastic material, and its tensile strength can reach 30 MPa or a little higher. Polypropylene with higher isotactic index has higher tensile strength, but with the increase of isotactic index, the impact strength of the material decreases, but it doesn't change after a certain value.
Temperature and loading rate have a great influence on the toughness of polypropylene. When the temperature is higher than the vitrification temperature, the impact failure is ductile fracture, and the temperature is brittle fracture below the vitrification temperature, and the impact strength decreases greatly. Increasing the loading rate can increase the transition temperature of ductile fracture to brittle fracture. Polypropylene has excellent bending fatigue resistance, and its products can be flexed 106 times at normal temperature without damage.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
http://www.yaruichem.com
Along with the people to the environmental protection and safety requirements more and more high, people on the safety of plastic products for food, medicine and feed packaging put forward higher requirements, especially in recent years, BHT suspected carcinogenic, as safe and effective measures, high molecular weight hindered phenol on the one hand, high heat resistance in the continuous development and Application on the other hand, non-toxic natural antioxidant varieties into practice application, the most representative natural non-toxic antioxidants VE, VE active ingredient is alpha tocopherol (ATP), ATP not only showed high antioxidant activity, but also can eliminate or reduce the peculiar smell of polypropylene in the packaging material, so the plastic packaging industry especially food and pharmaceutical manufacturers expressed a great interest.
Although the price of natural non-toxic antioxidant VE is 3~4 times higher than that of hindered phenol such as Irganox and 1076, the actual cost is lower than 40% of the corresponding phenolic antioxidants, which has the potential of substitution. The antioxidants, such as VE and oophosphate, not only have good antioxidation, but also have high safety and non-toxic side effects.
Can be used to replace the toxic side effects of the currently widely used tert Ding Ji hydroxyanisole (BHA), 2, 6- di Ding Ji (BHT) and p-cresol gallate (PG) and other chemical antioxidant is represent the general trend. Based on VE, solid composite "green" varieties, which are combined with phosphite, glycerol, polyethylene glycol and high porosity resin, have good prospects for development.
Vitamin E is also known as vitamin E. It is also known as tocopherol or PIH. It's one of the most important antioxidants. Soluble in organic solvents such as fat and ethanol, it is insoluble in water, stable in heat and acid, unstable in alkali, sensitive to oxygen and insensitive to heat, but vitamin E activity is reduced significantly during frying. Are there in the cooking oil, fruits, vegetables and grain. Vitamin E is a fat soluble vitamin with 8 forms. It is often used in cream and lotion, because people believe that vitamin E can promote skin healing and scar formation after being injured by burns.
Natural vitamin E (Vitamin E) is a fat soluble vitamin, also known as tocopherol, is one of the most important antioxidants. Soluble in organic solvents such as fat and ethanol, it is insoluble in water, stable in heat and acid, unstable in alkali, sensitive to oxygen and insensitive to heat, but vitamin E activity is reduced significantly during frying. Tocopherol can promote hormone secretion, make sperm motility and increase in the number; the women's estrogen levels, improve fertility, prevention of abortion, but also has good curative effect for the prevention and treatment of male infertility, burns, frostbite, capillary hemorrhage, climacteric syndrome, beauty and other aspects. In recent years, vitamin E has also been found to inhibit the reaction of peroxide in the crystalline body of the eye, dilatation of the end of the blood vessels and the improvement of blood circulation.
Triphenyl phosphite (antioxidant, stabilizer TPPi) production process
1. Phosphorus oxychloride as the direct method (also called thermal method) phenol with pyridine and anhydrous benzene as solvent, in no more than 10 ℃ temperature, slowly add oxygen phosphorus chloride, then under reflux temperature, the reaction of 3 ~ 4 h. After cooling to room temperature, the reactants are washed by water to recycle pyridine. After centrifugal dehydration, the reagents are dehydrated with dried sodium sulfate, which is filtered to remove sodium sulfate. The first atmospheric distillation recovery of benzene, vacuum distillation, collected 243 ~ 245 ℃ (1.47 kPa) fraction, by cooling, crystallization, crushing is the finished product.
2. After phenol melting, stirring under add phosphorus trichloride under 25 ℃, Triphenyl phosphite is generated; Then heat up to 70 ℃ ventilation with chlorine gas, generated two chlorinated triphenyl phosphate; Again at 50 ℃ water hydrolysis, triphenyl phosphate. The hydrolysate with 5% soda solution for neutralization, water washing, the evaporation and vacuum distillation, collected 243 ~ 245 ℃ (1.47 kPa) fractions, cooling, crystallization, crushing, packaging is the finished product.
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.
Vitamin E rich foods are: fruits and vegetables, nuts, lean meat, milk, eggs, press plant oil, etc. Fruits and vegetables include gooseberry, spinach, cabbage, vegetable plug, kale, lettuce, yam, sweet potato. Nuts include almonds, hazelnuts and walnuts. The press plant oil includes sunflower seeds, sesame seeds, corn, olives, peanuts, and Camellia. In addition, safflower, soybean, cottonseed, wheat germ and cod liver oil have a certain content of vitamin E, which is the most abundant in wheat germ.
Alias: tocopherol; vitamin E; (2) -[2R* (4R*, 8R*)]-3,4- two -2,5,7,8- four -2- (4,8,12- methyl hydrogen three methyl thirteen alkyl) -6- chroman alcohols; tocopherol (vitamin E); natural vitamin E
Tocopherol has four main derivatives, which are divided into four kinds, namely, alpha, beta, gamma and delta according to the methyl position. The activity of three alkenols related to tocopherol in the substituent group is certain, but the activity of tocopherol can be significantly reduced.
Vitamin E can promote the metabolism of the body, enhance the endurance of the body and improve the immunity. In addition, vitamin E is an efficient antioxidant, which protects biofilms from damage by peroxide, and improves skin blood circulation, enhances skin cell vitality and delaying senility. The lack of it will result in adverse consequences such as dry skin, rough skin and excessive aging.
The crystallinity of polypropylene is high and the structure is regular, so it has excellent mechanical properties. The absolute value of mechanical properties of polypropylene is higher than that of polyethylene, but it still belongs to a low variety in plastic material, and its tensile strength can reach 30 MPa or a little higher. Polypropylene with higher isotactic index has higher tensile strength, but with the increase of isotactic index, the impact strength of the material decreases, but it doesn't change after a certain value.
Temperature and loading rate have a great influence on the toughness of polypropylene. When the temperature is higher than the vitrification temperature, the impact failure is ductile fracture, and the temperature is brittle fracture below the vitrification temperature, and the impact strength decreases greatly. Increasing the loading rate can increase the transition temperature of ductile fracture to brittle fracture. Polypropylene has excellent bending fatigue resistance, and its products can be flexed 106 times at normal temperature without damage.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
http://www.yaruichem.com
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