News Details
Molecular structure of antioxidants
2018-1-16 12:16:28
Molecular structure of antioxidants
With the rapid development of macromolecule material industry, the research, development and production of antioxidant are also increasing. In recent decades, the improvement and development of anti-oxygen agent have been increasing, and new kinds of antioxidant varieties suitable for special purpose have been springing up.
The activity of the molecular structure of the antioxidants - research become the one of quite active frontier research fields in the world, and in medicinal chemistry, environmental chemistry, metallurgy and flotation reagents molecular design has been successfully used. In recent years, the molecular structure of the antioxidant activity - correlation research caused the extensive interest of scholars, the molecular structure of the antioxidants and antioxidant activity, the relationship between existing more experimental research, and obtained some research results.
The relationship between antioxidant structure and antioxidant properties. The structure of the polymer antioxidant determines its antioxidant properties. It is known from the oxidation mechanism that antioxidants should have the following properties:
(1) the active hydrogen atom should be more active than the active hydrogen atom on the polymer chain;
(2) the antioxidant free radicals should have sufficient stability;
(3) antioxidants themselves should be more difficult to oxidize, otherwise they will not be oxidized to resist oxidation. Due to high polymer material (especially plastic) often processing molding at high temperatures, which requires the use of antioxidants with sufficient enough thermal stability and high boiling point, otherwise under the processing temperature decomposition or volatile, not only can severely affect their antioxidant effect, still can pollute the environment. In addition, the antioxidant should have good compatibility with the polymer materials, so as to ensure the good dispersion of the polymer materials, so as to better play its anti-oxidation performance.
New chemical structure of antioxidant. Most of the antioxidants used in polymers in the last 20 years have modified the known structures and improved their auxiliary properties. There is no basic new chemical structure.
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 Irganox HP series for polyolefin stability is a new invention because the series is based on a new type of complex. These compounds, known as benzoans or lactones, have long been known in patent literature but have not yet been applied in the form of industrial products.
Irganox HP series consists of three components: as for the center with oxygen free radical scavenger space steric phenol (or AO, AO AO - 2-3-4), as a hydrogen peroxide decomposition agent of phosphite (PS - 1) and lactone HP - 136 (AO), the latter is used as a less oxygen free radical scavenger and under the condition of C centered on oxygen free radical scavenger, particularly effective in the machining process. The ratio of three components is balanced to achieve good processing stability and long-term thermal stability with low decolorization tendency.
Comparison of the role of Irganox HP (hp-2) with conventional diphenol/phosphatide mixtures (b-1). The amount of antioxidants can be reduced by about 40%, and the effect is the same. The high efficiency of the lactone series with extremely high processing temperatures is obvious, although the concentration is low.
Irganox XP is an extension of Ciba containing lactone products. Unlike Irganox HP products, these products use high-performance phosphates ps-2 and ps-3 in order to achieve better color characteristics in specific applications. The containing lactone series is also used as a stabilizing PU foaming agent. The triple combination of ao-1, ao-6 and ao-7 can prevent the coke burning of PU foam. The advantages of the series also include: better resistance to discoloration and low volatility caused by nitrogen oxides, which is particularly important in the automotive field.
CGX AO145 is a new type of main antioxidant. It is part of the synergistic mixture Irganox 1141, which is specially developed for stabilization of ABS and MBS. This series is liquid and can be added to ABS latex in the form of emulsion before solidification. This series of products can improve the thermal stability of ABS, and it has good cost effectiveness compared with the antioxidant used in the present.
The same series is also used for the termination of the PVC chain. As an antioxidant, it contributes to the stability of PVC. As a liquid antioxidant, ao-9 can be added more easily, and compared with the current process state, the PVC with this component makes the color better.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
http://www.yaruichem.com
With the rapid development of macromolecule material industry, the research, development and production of antioxidant are also increasing. In recent decades, the improvement and development of anti-oxygen agent have been increasing, and new kinds of antioxidant varieties suitable for special purpose have been springing up.
The activity of the molecular structure of the antioxidants - research become the one of quite active frontier research fields in the world, and in medicinal chemistry, environmental chemistry, metallurgy and flotation reagents molecular design has been successfully used. In recent years, the molecular structure of the antioxidant activity - correlation research caused the extensive interest of scholars, the molecular structure of the antioxidants and antioxidant activity, the relationship between existing more experimental research, and obtained some research results.
The relationship between antioxidant structure and antioxidant properties. The structure of the polymer antioxidant determines its antioxidant properties. It is known from the oxidation mechanism that antioxidants should have the following properties:
(1) the active hydrogen atom should be more active than the active hydrogen atom on the polymer chain;
(2) the antioxidant free radicals should have sufficient stability;
(3) antioxidants themselves should be more difficult to oxidize, otherwise they will not be oxidized to resist oxidation. Due to high polymer material (especially plastic) often processing molding at high temperatures, which requires the use of antioxidants with sufficient enough thermal stability and high boiling point, otherwise under the processing temperature decomposition or volatile, not only can severely affect their antioxidant effect, still can pollute the environment. In addition, the antioxidant should have good compatibility with the polymer materials, so as to ensure the good dispersion of the polymer materials, so as to better play its anti-oxidation performance.
New chemical structure of antioxidant. Most of the antioxidants used in polymers in the last 20 years have modified the known structures and improved their auxiliary properties. There is no basic new chemical structure.
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 Irganox HP series for polyolefin stability is a new invention because the series is based on a new type of complex. These compounds, known as benzoans or lactones, have long been known in patent literature but have not yet been applied in the form of industrial products.
Irganox HP series consists of three components: as for the center with oxygen free radical scavenger space steric phenol (or AO, AO AO - 2-3-4), as a hydrogen peroxide decomposition agent of phosphite (PS - 1) and lactone HP - 136 (AO), the latter is used as a less oxygen free radical scavenger and under the condition of C centered on oxygen free radical scavenger, particularly effective in the machining process. The ratio of three components is balanced to achieve good processing stability and long-term thermal stability with low decolorization tendency.
Comparison of the role of Irganox HP (hp-2) with conventional diphenol/phosphatide mixtures (b-1). The amount of antioxidants can be reduced by about 40%, and the effect is the same. The high efficiency of the lactone series with extremely high processing temperatures is obvious, although the concentration is low.
Irganox XP is an extension of Ciba containing lactone products. Unlike Irganox HP products, these products use high-performance phosphates ps-2 and ps-3 in order to achieve better color characteristics in specific applications. The containing lactone series is also used as a stabilizing PU foaming agent. The triple combination of ao-1, ao-6 and ao-7 can prevent the coke burning of PU foam. The advantages of the series also include: better resistance to discoloration and low volatility caused by nitrogen oxides, which is particularly important in the automotive field.
CGX AO145 is a new type of main antioxidant. It is part of the synergistic mixture Irganox 1141, which is specially developed for stabilization of ABS and MBS. This series is liquid and can be added to ABS latex in the form of emulsion before solidification. This series of products can improve the thermal stability of ABS, and it has good cost effectiveness compared with the antioxidant used in the present.
The same series is also used for the termination of the PVC chain. As an antioxidant, it contributes to the stability of PVC. As a liquid antioxidant, ao-9 can be added more easily, and compared with the current process state, the PVC with this component makes the color better.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
http://www.yaruichem.com
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