News Details
Polyolefin natural environmental antioxidant
2018-1-9 17:35:59
Polyolefin natural environmental antioxidant
In order to meet the requirements of environmental protection and the needs of the people healthy, advocate make use in recent years some non-toxic natural antioxidants (especially in plastics and food contact), but most of the natural antioxidant thermal stability is poor, does not apply to polymer synthesis industry.
9 o 2 o century s development of vitamin E in polyolefin oxidation technology, natural environmental protection for polyolefin antioxidant vitamin E good antioxidant effect, less dosage, so the price is more expensive, but the overall cost of stabilizing formula is not higher than the traditional formula, has certain market competitiveness, especially the polyolefin natural environmental protection antioxidants used in food and medicine on contact materials.
So far, polyolefin natural environmental antioxidant vitamin E is the most successful example in polymer processing industry. The main component of vitamin E is a tocopherol, which is characterized by the presence of obstructive phenol and a structure that increases the compatibility with the polymer, which is relatively high in quality and non-toxic.
Simple vitamin E is easy to yellow when used, but it can be used to solve this problem with the combination of phosphatide and polyol. In addition, studies have found that vitamin C can be used to regenerate vitamin E, which can be used to reduce costs.
There are many different kinds of antioxidants and different mechanism, through the mixed use, to maximize the advantage and the disadvantage of antioxidants to minimize the extent, this is the development trend of antioxidants. In recent years the rapid development of polyolefin industry in China, will improve the anti-oxidant performance against the requirements, and in polyolefin additives in the important position of hindered phenolic antioxidants tend to multipurpose composite, and environmental protection. Therefore, it is necessary to recognize and understand the interaction between antioxidants, and to pay attention to the anti-oxidant.
Vitamin E is also known as vitamin E. It is also known as tocopherol or pregnancyphenol. It's one of the main antioxidants. Soluble in organic solvents such as fat and ethanol, insoluble in water, stable to heat and acid, unstable to alkali, sensitive to oxygen and insensitive to heat, but the activity of vitamin E decreased significantly when frying. It is found in oil, fruit, vegetables and grain. Vitamin E is a kind of eight forms of fat-soluble vitamins, is often used in creams and lotions, because it is believed that vitamin E for damage from such as burns, can promote skin healing and reduce scar formation.
There are four main derivatives of tocopherol, which are divided into four types: alpha, beta, gamma, and gamma. It is certain that the compound of trienol, which is related to tocopherol, is not active at the same time, but the activity of tocopherol will decrease obviously.
Triphenyl phosphite (antioxidant, stabilizer TPPi)
Packing method: net weight of 200KG/galvanized iron bucket (a small cabinet to hold 16 tons), 1000KG/IB (a small container with 18 tons) or 23 tons of it.
Port of shipment: Shanghai port
Price quotation validity: 15 days
Warehouse time: within 15 days (customs clearance)
Export rights: our own right to import and export.
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.
The content of vitamin E was determined by HPLC. Method principle: test samples and internal standard are made from methanol solution, chromatographic separation into the gas chromatograph, ultraviolet absorption detector, 254 nm wavelengths of detection of vitamin E (C31H52O3) and internal standard are 32 alkanes absorption value, its content is calculated.
The concentration of silicone (ov-17) was fixed, the coating concentration was 2%, or hp-1 capillary column (100% dimethylpolysiloxane) was used as the analytical column. The theoretical plate number is not less than 500 (filled column) or 5000 (capillary column) according to vitamin E peak, and the separation degree of vitamin E peak and internal standard material peak should meet the requirements.
Precise name of the product 20mg, set in a brown bottle. Preparation of the control solution. Precision according to take vitamin E reference substance and reference substance 25 mg vitamin E, 100 ml volumetric flask brown, add 80 ml isooctane, avoid heating, ultrasonic processing 1 minute make completely dissolved, and add isooctane to scale, shake well, blunt nitrogen plug, avoid light, store below 0 ℃.
Preparation of internal standard solution. Taking a moderate amount of tri-dodecane, plus n-hexane dissolved and diluted into a solution of 1.0mg per 1mL.
Preparation of the test solution. The above test products are precision plus internal standard solution 10mL, dense plug, shake to dissolve, ready to supply sample solution.
Calibration factor determination. Is 32 alkanes is right amount, plus n-hexane soluble (diluted into each 1 ml contains 1.0 mg solution) and vitamin E reference substance 20 mg, precision said, brown with a plug, precision and internal standard solution 10 ml, plug, vibration wave dissolving, take 1 ~ 3 mu L injection gas chromatograph, calculate calibration factor.
The weight should be accurate to one thousandth of the weight taken. The accuracy of "precision measurement" refers to the accuracy of the volume of the volume of the pipette in accordance with the national standard.
Precision from the above respectively with reference substance solution of test sample solution, 1 ~ 3 mu L injection gas chromatograph, ultraviolet absorption detector, 254 nm wavelengths of the determination of vitamin E) and internal standard are 32 absorption value, according to the internal standard method with peak area calculation, quick.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
http://www.yaruichem.com
In order to meet the requirements of environmental protection and the needs of the people healthy, advocate make use in recent years some non-toxic natural antioxidants (especially in plastics and food contact), but most of the natural antioxidant thermal stability is poor, does not apply to polymer synthesis industry.
9 o 2 o century s development of vitamin E in polyolefin oxidation technology, natural environmental protection for polyolefin antioxidant vitamin E good antioxidant effect, less dosage, so the price is more expensive, but the overall cost of stabilizing formula is not higher than the traditional formula, has certain market competitiveness, especially the polyolefin natural environmental protection antioxidants used in food and medicine on contact materials.
So far, polyolefin natural environmental antioxidant vitamin E is the most successful example in polymer processing industry. The main component of vitamin E is a tocopherol, which is characterized by the presence of obstructive phenol and a structure that increases the compatibility with the polymer, which is relatively high in quality and non-toxic.
Simple vitamin E is easy to yellow when used, but it can be used to solve this problem with the combination of phosphatide and polyol. In addition, studies have found that vitamin C can be used to regenerate vitamin E, which can be used to reduce costs.
There are many different kinds of antioxidants and different mechanism, through the mixed use, to maximize the advantage and the disadvantage of antioxidants to minimize the extent, this is the development trend of antioxidants. In recent years the rapid development of polyolefin industry in China, will improve the anti-oxidant performance against the requirements, and in polyolefin additives in the important position of hindered phenolic antioxidants tend to multipurpose composite, and environmental protection. Therefore, it is necessary to recognize and understand the interaction between antioxidants, and to pay attention to the anti-oxidant.
Vitamin E is also known as vitamin E. It is also known as tocopherol or pregnancyphenol. It's one of the main antioxidants. Soluble in organic solvents such as fat and ethanol, insoluble in water, stable to heat and acid, unstable to alkali, sensitive to oxygen and insensitive to heat, but the activity of vitamin E decreased significantly when frying. It is found in oil, fruit, vegetables and grain. Vitamin E is a kind of eight forms of fat-soluble vitamins, is often used in creams and lotions, because it is believed that vitamin E for damage from such as burns, can promote skin healing and reduce scar formation.
There are four main derivatives of tocopherol, which are divided into four types: alpha, beta, gamma, and gamma. It is certain that the compound of trienol, which is related to tocopherol, is not active at the same time, but the activity of tocopherol will decrease obviously.
Triphenyl phosphite (antioxidant, stabilizer TPPi)
Packing method: net weight of 200KG/galvanized iron bucket (a small cabinet to hold 16 tons), 1000KG/IB (a small container with 18 tons) or 23 tons of it.
Port of shipment: Shanghai port
Price quotation validity: 15 days
Warehouse time: within 15 days (customs clearance)
Export rights: our own right to import and export.
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.
The content of vitamin E was determined by HPLC. Method principle: test samples and internal standard are made from methanol solution, chromatographic separation into the gas chromatograph, ultraviolet absorption detector, 254 nm wavelengths of detection of vitamin E (C31H52O3) and internal standard are 32 alkanes absorption value, its content is calculated.
The concentration of silicone (ov-17) was fixed, the coating concentration was 2%, or hp-1 capillary column (100% dimethylpolysiloxane) was used as the analytical column. The theoretical plate number is not less than 500 (filled column) or 5000 (capillary column) according to vitamin E peak, and the separation degree of vitamin E peak and internal standard material peak should meet the requirements.
Precise name of the product 20mg, set in a brown bottle. Preparation of the control solution. Precision according to take vitamin E reference substance and reference substance 25 mg vitamin E, 100 ml volumetric flask brown, add 80 ml isooctane, avoid heating, ultrasonic processing 1 minute make completely dissolved, and add isooctane to scale, shake well, blunt nitrogen plug, avoid light, store below 0 ℃.
Preparation of internal standard solution. Taking a moderate amount of tri-dodecane, plus n-hexane dissolved and diluted into a solution of 1.0mg per 1mL.
Preparation of the test solution. The above test products are precision plus internal standard solution 10mL, dense plug, shake to dissolve, ready to supply sample solution.
Calibration factor determination. Is 32 alkanes is right amount, plus n-hexane soluble (diluted into each 1 ml contains 1.0 mg solution) and vitamin E reference substance 20 mg, precision said, brown with a plug, precision and internal standard solution 10 ml, plug, vibration wave dissolving, take 1 ~ 3 mu L injection gas chromatograph, calculate calibration factor.
The weight should be accurate to one thousandth of the weight taken. The accuracy of "precision measurement" refers to the accuracy of the volume of the volume of the pipette in accordance with the national standard.
Precision from the above respectively with reference substance solution of test sample solution, 1 ~ 3 mu L injection gas chromatograph, ultraviolet absorption detector, 254 nm wavelengths of the determination of vitamin E) and internal standard are 32 absorption value, according to the internal standard method with peak area calculation, quick.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
http://www.yaruichem.com
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