News Details
Sulfur ester antioxidant
2017-12-31 19:00:08
Sulfur ester antioxidant
Thioester antioxidant mainly consists of two propionate (DLTP), two propionic acid double eighteen ester (DSTP) and two (fourteen) ester (DMTP) of thiopropionic acid, thiopropionic acid, two propionic acid. The sulfur ester antioxidant and phenolic antioxidant have good synergistic effect, which can obviously improve the long-term thermal oxidation stability of polypropylene.
Among them, the synergistic effect of DSTP and phenolic antioxidants is better, but the compatibility of polypropylene with polypropylene is poor and the spray frost will occur when the amount of addition is much added. Sulfur ester antioxidants are widely used antioxidants in the early stage of polypropylene. However, because of their poor processing stability, the products are easy to yellowing. They are antagonistic to the hindered amine light stabilizers and will significantly reduce their weathering resistance. In addition, because of the odor, it is restricted in the application of food packaging.
Compared with the phosphorus antioxidant, the development and application of sulfur antioxidants appears to be very monotonous, and thiopropionic acid still occupies the dominant position. In the future, the development of high molecular weight and functional varieties is the development direction of sulfur antioxidants.
The new product combines the advantages of thioester and phosphite two auxiliary antioxidant, has good stability, color change and lasting antiweathering, and under the condition of high temperature and no smell escape, can produce a good synergistic effect of stability and UV light stabilizer. There are also liquid sulfur antioxidants with the internal synergism of the molecules.
Thiopropionic acid two propionate (DILAURYL THIODIPROPIONATE, DLTP), molecular C10H58O4S, relative molecular mass of 514.85. In our country allows for food antioxidant thioethers only thio two propionic acid cinnamyl ester (DLTP) in February a, as a kind of peroxide decomposition agent, it can effectively decompose the hydrogen peroxide oxidation of lipids in the chain reaction (ROOH), to achieve the purpose of interruption of chain reaction, thereby prolonging the shelf life and rich oil fat food. As an oil soluble antioxidant, it is not only toxic, but also has good antioxidant and stability properties, and its price is low, so it has good prospects for development.
Thiopropionic acid, two propionate, was called DLTP for short. A white powder or a scaly substance. The density is 0.915, and the melting point is 39~40. Soluble in benzene, toluene, acetone, gasoline and other solvents. It has the effect of decomposing peroxide. It can be used as an auxiliary antioxidant for polyethylene, polypropylene, ABS resin, PVC and so on. It has the characteristics of non pollution, no coloring and no decomposition at high temperature. The esterification of thiopropionic acid and lauryl alcohol is made from thiopropionic acid two. It can be used as a reference GB2760-2011 for food antioxidants.
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.
The flocculent white crystalline solid, is a kind of special sweet smell and lipid odor sulfiden. The melting point is above 38 degrees centigrade, and the relative density (20 /4 C) is 0.975. Insoluble in water, soluble in acetone, carbon tetrachloride, benzene, petroleum ether and other organic solvents. The solubility of g/100g in various solvents at 20 C is: methanol 9.1, acetone 20, petroleum ether 40, carbon tetrachloride 100, and benzene 133. It is easily coloured and has little solubility in oil.
DLTP has synergistic effect with phenolic antioxidants such as BHA and BHT, which can be used in production not only to improve the antioxidant properties but also to reduce the toxicity and cost. DLTP has excellent thermal stability, the loss rate of 30min at 200 c is only 0.7%, which is more suitable for baking and fried food, and also has excellent time stability.
Two propionic acid of thiopropionic acid in February. The three step method is to produce thiosulfonic acid from propylene and cyanide as raw material by condensation with sodium sulfide, and then hydrolyze to two propionic acid, then react with lauryl alcohol to separate and refine it from the reaction of lauryl alcohol. Two step method: using acryl cyanide as raw material, condensation into thiopropionic acid two propionic acid, and reacting with lauryl alcohol, separated and refined.
As an antioxidant, cinnamate, thiopropionic acid two, can effectively decompose the hydrogen peroxide (ROOH) in the auto oxidation chain reaction of oils and fats, and achieve the purpose of interrupting chain reactions. Thus prolonging the storage period of fat and fat food. As an oil soluble antioxidant, it is not only small in toxicity, but also with good antioxidant and stable performance. GB2760-2011 stipulates that it can be used for antioxidant and fruit and vegetable preservation with oil and fat food, and the maximum use is 0.2g/kg.
Thiosulfate two propionate double eighteen ester is a white floc or scaly crystal. Melting point (temperature):64.5-67.5 relative density (water =1):1.03; saturated vapor pressure (kPa):0.13 (250 C); solubility: soluble in acetone, ethyl ether, alcohol, insoluble in cold water. The antioxidants are used as antioxidants in polyethylene, polypropylene, synthetic rubber and oil esters.
Thiol antioxidant thinester antioxidant is used as a sulfur and vinegar compound to prevent the degradation of high molecular compounds. Its antioxidant mechanism is that sulfur compounds, such as sulfonic acid and other acidic substances, play a catalytic role in the decomposition of hydroperoxide, which shows good antioxidant capacity. This kind of antioxidants are: thio two propionic acid vinegar, January, P) better phenol [DU. Two}}}I 18}} phosphorothioate (T) STP).
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
http://www.yaruichem.com
Thioester antioxidant mainly consists of two propionate (DLTP), two propionic acid double eighteen ester (DSTP) and two (fourteen) ester (DMTP) of thiopropionic acid, thiopropionic acid, two propionic acid. The sulfur ester antioxidant and phenolic antioxidant have good synergistic effect, which can obviously improve the long-term thermal oxidation stability of polypropylene.
Among them, the synergistic effect of DSTP and phenolic antioxidants is better, but the compatibility of polypropylene with polypropylene is poor and the spray frost will occur when the amount of addition is much added. Sulfur ester antioxidants are widely used antioxidants in the early stage of polypropylene. However, because of their poor processing stability, the products are easy to yellowing. They are antagonistic to the hindered amine light stabilizers and will significantly reduce their weathering resistance. In addition, because of the odor, it is restricted in the application of food packaging.
Compared with the phosphorus antioxidant, the development and application of sulfur antioxidants appears to be very monotonous, and thiopropionic acid still occupies the dominant position. In the future, the development of high molecular weight and functional varieties is the development direction of sulfur antioxidants.
The new product combines the advantages of thioester and phosphite two auxiliary antioxidant, has good stability, color change and lasting antiweathering, and under the condition of high temperature and no smell escape, can produce a good synergistic effect of stability and UV light stabilizer. There are also liquid sulfur antioxidants with the internal synergism of the molecules.
Thiopropionic acid two propionate (DILAURYL THIODIPROPIONATE, DLTP), molecular C10H58O4S, relative molecular mass of 514.85. In our country allows for food antioxidant thioethers only thio two propionic acid cinnamyl ester (DLTP) in February a, as a kind of peroxide decomposition agent, it can effectively decompose the hydrogen peroxide oxidation of lipids in the chain reaction (ROOH), to achieve the purpose of interruption of chain reaction, thereby prolonging the shelf life and rich oil fat food. As an oil soluble antioxidant, it is not only toxic, but also has good antioxidant and stability properties, and its price is low, so it has good prospects for development.
Thiopropionic acid, two propionate, was called DLTP for short. A white powder or a scaly substance. The density is 0.915, and the melting point is 39~40. Soluble in benzene, toluene, acetone, gasoline and other solvents. It has the effect of decomposing peroxide. It can be used as an auxiliary antioxidant for polyethylene, polypropylene, ABS resin, PVC and so on. It has the characteristics of non pollution, no coloring and no decomposition at high temperature. The esterification of thiopropionic acid and lauryl alcohol is made from thiopropionic acid two. It can be used as a reference GB2760-2011 for food antioxidants.
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.
The flocculent white crystalline solid, is a kind of special sweet smell and lipid odor sulfiden. The melting point is above 38 degrees centigrade, and the relative density (20 /4 C) is 0.975. Insoluble in water, soluble in acetone, carbon tetrachloride, benzene, petroleum ether and other organic solvents. The solubility of g/100g in various solvents at 20 C is: methanol 9.1, acetone 20, petroleum ether 40, carbon tetrachloride 100, and benzene 133. It is easily coloured and has little solubility in oil.
DLTP has synergistic effect with phenolic antioxidants such as BHA and BHT, which can be used in production not only to improve the antioxidant properties but also to reduce the toxicity and cost. DLTP has excellent thermal stability, the loss rate of 30min at 200 c is only 0.7%, which is more suitable for baking and fried food, and also has excellent time stability.
Two propionic acid of thiopropionic acid in February. The three step method is to produce thiosulfonic acid from propylene and cyanide as raw material by condensation with sodium sulfide, and then hydrolyze to two propionic acid, then react with lauryl alcohol to separate and refine it from the reaction of lauryl alcohol. Two step method: using acryl cyanide as raw material, condensation into thiopropionic acid two propionic acid, and reacting with lauryl alcohol, separated and refined.
As an antioxidant, cinnamate, thiopropionic acid two, can effectively decompose the hydrogen peroxide (ROOH) in the auto oxidation chain reaction of oils and fats, and achieve the purpose of interrupting chain reactions. Thus prolonging the storage period of fat and fat food. As an oil soluble antioxidant, it is not only small in toxicity, but also with good antioxidant and stable performance. GB2760-2011 stipulates that it can be used for antioxidant and fruit and vegetable preservation with oil and fat food, and the maximum use is 0.2g/kg.
Thiosulfate two propionate double eighteen ester is a white floc or scaly crystal. Melting point (temperature):64.5-67.5 relative density (water =1):1.03; saturated vapor pressure (kPa):0.13 (250 C); solubility: soluble in acetone, ethyl ether, alcohol, insoluble in cold water. The antioxidants are used as antioxidants in polyethylene, polypropylene, synthetic rubber and oil esters.
Thiol antioxidant thinester antioxidant is used as a sulfur and vinegar compound to prevent the degradation of high molecular compounds. Its antioxidant mechanism is that sulfur compounds, such as sulfonic acid and other acidic substances, play a catalytic role in the decomposition of hydroperoxide, which shows good antioxidant capacity. This kind of antioxidants are: thio two propionic acid vinegar, January, P) better phenol [DU. Two}}}I 18}} phosphorothioate (T) STP).
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
http://www.yaruichem.com
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