News Details
Polypropylene complex antioxidant
2018-1-15 12:09:01
Polypropylene complex antioxidant
Phenolic antioxidant and phosphate-ester complex system are the mainstream of the development of polypropylene compound antioxidant.
Polypropylene complex antioxidant is developed by the plastics processing and application research institute, mainly for polypropylene processing applications. The results show that polypropylene compound antioxidant has the characteristics of high quality, high efficiency, economy and convenience. The study also argues that antioxidant 264 12 (2, 6 tertiary butyl a 4 a methyl phenol) and hindered phenolic antioxidants lOlO homogeneous, replace the latter with the former. After with phosphite ester for improving thermal oxidation resistance of polypropylene with similar effect.
Since the antioxidant 264 is about 50% lower than the antioxidant 1010, it should be given some attention.
The compound anti-oxidant DF 1 5 is a compound additive, which can improve the antioxidant aging, thermal stability and processing properties of HDPE. Compound with antioxidant DF 5:1076 [~ a f4, hydroxy 3, 5 two butyl phenyl) 1 octadecanol propionate with 168 quality ratio is 0.40 ~ 0.75, recommend 0.50. Distribution of antioxidant agent mass fraction is 0.06% ~ 0.08%. The recommended formula: 168/1010 / calcium stearate (heat stabilizer)/zinc stearate thermal stability (N)/low molecular polyethylene (dispersant) mass fraction ratio of 2/4/4/7/3. The results show that the distribution of antioxidant 1076 and 168 system can well improve the antioxidant of HDPE
Performance, achieve or even exceed the grade of HDPE, the same elbow can reduce the main antioxidant usage, reduce the production cost. Linear low density polyethylene fLLDPE) special compound auxiliary agent, including compound antioxidant CAO- o.
Polypropylene has excellent mechanical properties due to its high crystallinity and structure. The absolute value of the mechanical properties of polypropylene is higher than that of polyethylene, but it is still a relatively low variety in plastic materials, and its tensile strength can reach only 30 MPa or slightly higher. While the larger polypropylene has a higher tensile strength, the impact strength of the material decreases with the increase of the index, but it does not change after dropping to a certain number.
Temperature and loading rate have great influence on the toughness of polypropylene. When the temperature is higher than the vitrification temperature, the impact failure is ductile fracture, which is lower than the vitrification temperature, and the impact strength value is greatly reduced. Increasing the loading rate can increase the temperature of fracture transition to brittle fracture. Polypropylene has excellent resistance to bending fatigue, and its products can bend 106 times at normal temperature without damage.
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.
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 the resistance to bending fatigue.
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.
Polypropylene has a higher dielectric coefficient and can be used to make thermal electrical insulation products as the temperature rises. Its breakdown voltage is also high, suitable for electrical accessories and so on. Good resistance to voltage and arc resistance, but high static electricity, easy to age with copper contact.
Polypropylene is very sensitive to ultraviolet light, adding zinc oxide, dipropionic acid dilaurate, carbon black or similar opal filler can improve its aging resistance.
Hydrophobic parameter calculation reference (XlogP) : 3.32, the number of hydrogen bonding donor: 03, hydrogen bond receptor number: 34, the number of rotating chemical bonds: 15, tautomer quantity: 6, topological molecular polar surface area (TPSA) : 29.5 to avoid strong oxidizer, chloride, potassium permanganate sealed, a cool and dry place preserve, ensure good ventilation.
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. However, it is brittle at low temperature and is not wear-resistant and easy to wear. 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
Phenolic antioxidant and phosphate-ester complex system are the mainstream of the development of polypropylene compound antioxidant.
Polypropylene complex antioxidant is developed by the plastics processing and application research institute, mainly for polypropylene processing applications. The results show that polypropylene compound antioxidant has the characteristics of high quality, high efficiency, economy and convenience. The study also argues that antioxidant 264 12 (2, 6 tertiary butyl a 4 a methyl phenol) and hindered phenolic antioxidants lOlO homogeneous, replace the latter with the former. After with phosphite ester for improving thermal oxidation resistance of polypropylene with similar effect.
Since the antioxidant 264 is about 50% lower than the antioxidant 1010, it should be given some attention.
The compound anti-oxidant DF 1 5 is a compound additive, which can improve the antioxidant aging, thermal stability and processing properties of HDPE. Compound with antioxidant DF 5:1076 [~ a f4, hydroxy 3, 5 two butyl phenyl) 1 octadecanol propionate with 168 quality ratio is 0.40 ~ 0.75, recommend 0.50. Distribution of antioxidant agent mass fraction is 0.06% ~ 0.08%. The recommended formula: 168/1010 / calcium stearate (heat stabilizer)/zinc stearate thermal stability (N)/low molecular polyethylene (dispersant) mass fraction ratio of 2/4/4/7/3. The results show that the distribution of antioxidant 1076 and 168 system can well improve the antioxidant of HDPE
Performance, achieve or even exceed the grade of HDPE, the same elbow can reduce the main antioxidant usage, reduce the production cost. Linear low density polyethylene fLLDPE) special compound auxiliary agent, including compound antioxidant CAO- o.
Polypropylene has excellent mechanical properties due to its high crystallinity and structure. The absolute value of the mechanical properties of polypropylene is higher than that of polyethylene, but it is still a relatively low variety in plastic materials, and its tensile strength can reach only 30 MPa or slightly higher. While the larger polypropylene has a higher tensile strength, the impact strength of the material decreases with the increase of the index, but it does not change after dropping to a certain number.
Temperature and loading rate have great influence on the toughness of polypropylene. When the temperature is higher than the vitrification temperature, the impact failure is ductile fracture, which is lower than the vitrification temperature, and the impact strength value is greatly reduced. Increasing the loading rate can increase the temperature of fracture transition to brittle fracture. Polypropylene has excellent resistance to bending fatigue, and its products can bend 106 times at normal temperature without damage.
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.
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 the resistance to bending fatigue.
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.
Polypropylene has a higher dielectric coefficient and can be used to make thermal electrical insulation products as the temperature rises. Its breakdown voltage is also high, suitable for electrical accessories and so on. Good resistance to voltage and arc resistance, but high static electricity, easy to age with copper contact.
Polypropylene is very sensitive to ultraviolet light, adding zinc oxide, dipropionic acid dilaurate, carbon black or similar opal filler can improve its aging resistance.
Hydrophobic parameter calculation reference (XlogP) : 3.32, the number of hydrogen bonding donor: 03, hydrogen bond receptor number: 34, the number of rotating chemical bonds: 15, tautomer quantity: 6, topological molecular polar surface area (TPSA) : 29.5 to avoid strong oxidizer, chloride, potassium permanganate sealed, a cool and dry place preserve, ensure good ventilation.
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. However, it is brittle at low temperature and is not wear-resistant and easy to wear. 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
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