News Details
Polypropylene is used as a metal ion antioxidant
2018-1-7 20:05:48
Polypropylene is used as a metal ion antioxidant
Double the salicyl diamine and grass amide is a typical polypropylene antioxidants with metal ions, the polypropylene with metal ion antioxidants to double the salicyl diamine is given priority to, from its breed development trends, muti_function change is the main characteristic of functional metal ions passivator is bonded hindered phenol more functional products, polypropylene products with metal ions, antioxidants and the copper resistance and thermal oxygen aging resistance.
Oxamide, also called oxamide, code OA. It used to be made from oxalic acid and amide, and the cost was too high. Now with plastic industrial by-product of cyanic acid as raw material, using copper nitrate as catalytic agent, the direct synthesis under atmospheric pressure low temperature 50 ℃ to 80 ℃, lower cost, product purity can reach 99%.
Colorless crystal or powder. The relative density is 1.667 g/cm3. Melting point is 419 ℃. Soluble in water, insoluble in ethanol and ether. No moisture absorption. It can be decomposed into ammonia and carbonic acid. The action of hot water can produce ammonium ethylate. The cyanide was produced underheating conditions with phosphorus pentoxide. It is produced by diethyl diethyl diethyl ester and strong ammonia.
Used as stabilizer for nitrocellulose products. It can also be used as a slow-acting fertilizer. In the propellant used as a speed reducer, used as a chain extender in the lining formula, used as an air agent and a cooling agent in the gas producer.
Polypropylene has good heat resistance, products can be in above 100 ℃ temperature disinfection sterilization, under the condition of not affected by external forces, 150 ℃ and deformation. Brittle temperature - 35 ℃, 35 ℃ below - will happen embrittlement, cold tolerance than polyethylene. Reported values for polypropylene glass transition temperature of a 18 qc, 0 qc, 5 ℃, it is also because people with different samples, containing crystalline and amorphous facies proportion is different, make the molecular chains in the amorphous part of different chain length. Than polyethylene polypropylene melt temperature around 40 a 50%, about 164 an 164 ℃, 100% degree of isotactic polypropylene melting point is 176 ℃.
Polypropylene has a good chemical stability, besides can be concentrated sulfuric acid, nitric acid erosion, for other kinds of chemical reagents are stable, but the low molecular weight fatty hydrocarbon, aromatic hydrocarbon and chlorinated hydrocarbon can make polypropylene softening and swelling, such as its chemical stability at the same time there is some increase with the increase of the crystallinity, chemical pipe and fittings for the production, so the polypropylene anti-corrosion effect is good.
It has a high dielectric coefficient and can be used to make heated electrical insulation products as the temperature rises. Its breakdown voltage is also high, suitable for electrical accessories. The anti-voltage and arc resistance is good, but the electrostatic degree is high, and the copper contact is easy to age.
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.
Polypropylene is very sensitive to ultraviolet ray and can improve its aging resistance by adding zinc oxide, dipropionic acid dipropionate, carbon black or similar emulsion filler.
Polypropylene is a nontoxic, odorless, tasteless, high-crystalline polymer with a density of 0.90 -- "0.91g/cm3, one of the lightest of all plastics. It is especially stable for water, with water absorption rate of only 0.01 percent, and the molecular weight of about 815 thousand. It is well formed, but the shrinkage rate is large (for 1%~ 2.5%). Thick wall products are easy to sag, and for some parts with high precision, it is difficult to meet the requirements.
Polypropylene has high crystallinity and structure and thus has excellent mechanical properties. The absolute value of the mechanical properties of polypropylene is higher than that of polyethylene, but it is still a low quality in plastic materials, and its tensile strength can reach only 30 MPa or slightly higher. The high tensile strength of the larger polypropylene index is higher, but the impact strength of the material decreases with the increase of the other index, but it is no longer changed after falling to a certain value.
Temperature and loading rate have great influence on the toughness of polypropylene. When the temperature is higher than the glass temperature, the impact fracture is ductile fracture, which is lower than the vitrification temperature, and the impact strength value is greatly reduced. Increasing loading rate can increase the temperature of fracture transition to brittle fracture. Polypropylene has excellent anti-bending fatigue, and its products can bend 106 times without damage at normal temperature.
But at room temperature and low temperature, due to the high degree of molecular structure, the impact strength is poor. The most outstanding performance of polypropylene is anti - bending fatigue, commonly known as a hundred fold adhesive.
Polypropylene non-toxic, tasteless, small density, strength, stiffness, are better than that of low pressure polyethylene, hardness and heat resistance can be used at about 100 ℃. It has good dielectric performance and high frequency insulation and is not affected by humidity, but it is brittle at low temperature and is not wear-resistant and aging. Suitable for general mechanical parts, corrosion resistant parts and insulation parts. Organic solvents such as acid and alkali have little effect on it and can be used for food.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
http://www.yaruichem.com
Double the salicyl diamine and grass amide is a typical polypropylene antioxidants with metal ions, the polypropylene with metal ion antioxidants to double the salicyl diamine is given priority to, from its breed development trends, muti_function change is the main characteristic of functional metal ions passivator is bonded hindered phenol more functional products, polypropylene products with metal ions, antioxidants and the copper resistance and thermal oxygen aging resistance.
Oxamide, also called oxamide, code OA. It used to be made from oxalic acid and amide, and the cost was too high. Now with plastic industrial by-product of cyanic acid as raw material, using copper nitrate as catalytic agent, the direct synthesis under atmospheric pressure low temperature 50 ℃ to 80 ℃, lower cost, product purity can reach 99%.
Colorless crystal or powder. The relative density is 1.667 g/cm3. Melting point is 419 ℃. Soluble in water, insoluble in ethanol and ether. No moisture absorption. It can be decomposed into ammonia and carbonic acid. The action of hot water can produce ammonium ethylate. The cyanide was produced underheating conditions with phosphorus pentoxide. It is produced by diethyl diethyl diethyl ester and strong ammonia.
Used as stabilizer for nitrocellulose products. It can also be used as a slow-acting fertilizer. In the propellant used as a speed reducer, used as a chain extender in the lining formula, used as an air agent and a cooling agent in the gas producer.
Polypropylene has good heat resistance, products can be in above 100 ℃ temperature disinfection sterilization, under the condition of not affected by external forces, 150 ℃ and deformation. Brittle temperature - 35 ℃, 35 ℃ below - will happen embrittlement, cold tolerance than polyethylene. Reported values for polypropylene glass transition temperature of a 18 qc, 0 qc, 5 ℃, it is also because people with different samples, containing crystalline and amorphous facies proportion is different, make the molecular chains in the amorphous part of different chain length. Than polyethylene polypropylene melt temperature around 40 a 50%, about 164 an 164 ℃, 100% degree of isotactic polypropylene melting point is 176 ℃.
Polypropylene has a good chemical stability, besides can be concentrated sulfuric acid, nitric acid erosion, for other kinds of chemical reagents are stable, but the low molecular weight fatty hydrocarbon, aromatic hydrocarbon and chlorinated hydrocarbon can make polypropylene softening and swelling, such as its chemical stability at the same time there is some increase with the increase of the crystallinity, chemical pipe and fittings for the production, so the polypropylene anti-corrosion effect is good.
It has a high dielectric coefficient and can be used to make heated electrical insulation products as the temperature rises. Its breakdown voltage is also high, suitable for electrical accessories. The anti-voltage and arc resistance is good, but the electrostatic degree is high, and the copper contact is easy to age.
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.
Polypropylene is very sensitive to ultraviolet ray and can improve its aging resistance by adding zinc oxide, dipropionic acid dipropionate, carbon black or similar emulsion filler.
Polypropylene is a nontoxic, odorless, tasteless, high-crystalline polymer with a density of 0.90 -- "0.91g/cm3, one of the lightest of all plastics. It is especially stable for water, with water absorption rate of only 0.01 percent, and the molecular weight of about 815 thousand. It is well formed, but the shrinkage rate is large (for 1%~ 2.5%). Thick wall products are easy to sag, and for some parts with high precision, it is difficult to meet the requirements.
Polypropylene has high crystallinity and structure and thus has excellent mechanical properties. The absolute value of the mechanical properties of polypropylene is higher than that of polyethylene, but it is still a low quality in plastic materials, and its tensile strength can reach only 30 MPa or slightly higher. The high tensile strength of the larger polypropylene index is higher, but the impact strength of the material decreases with the increase of the other index, but it is no longer changed after falling to a certain value.
Temperature and loading rate have great influence on the toughness of polypropylene. When the temperature is higher than the glass temperature, the impact fracture is ductile fracture, which is lower than the vitrification temperature, and the impact strength value is greatly reduced. Increasing loading rate can increase the temperature of fracture transition to brittle fracture. Polypropylene has excellent anti-bending fatigue, and its products can bend 106 times without damage at normal temperature.
But at room temperature and low temperature, due to the high degree of molecular structure, the impact strength is poor. The most outstanding performance of polypropylene is anti - bending fatigue, commonly known as a hundred fold adhesive.
Polypropylene non-toxic, tasteless, small density, strength, stiffness, are better than that of low pressure polyethylene, hardness and heat resistance can be used at about 100 ℃. It has good dielectric performance and high frequency insulation and is not affected by humidity, but it is brittle at low temperature and is not wear-resistant and aging. Suitable for general mechanical parts, corrosion resistant parts and insulation parts. Organic solvents such as acid and alkali have little effect on it and can be used for food.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
http://www.yaruichem.com
Spanish
French
Italian
Portuguese
Japanese
Korean
Arabic
Russian