News Details
PVC resin antioxidant
2018-1-15 12:08:39
PVC resin antioxidant best non-toxic or low toxicity, no dust or low dust, in the manufacture and use of PVC resin has no harmful effect to human body, the animal, a plant, no harm to air, soil, water, free from contamination.
For agricultural film, food packaging, children's toys, disposable infusion sets and other indirect or direct contact with food, medicines, medical appliances and plastic products of the body, not only should choose has passed the United States food and drug administration (FDA) inspection and license, or the European Union commission rules allow antioxidants varieties of PVC resin, and add the amount should be strictly controlled under the maximum allowable limit.
Light stabilizer UV - 326 acute oral toxicity test number LD50 > 5000mg/kg is a relatively non-toxic chemical.
It is generally believed that PVC resin is accompanied with the reaction of dehydrochlorination (HCl) during thermal processing, thermal oxidation and photooxidation degradation. Hydrochloric acid can be used to inhibit the production of reactive nitrogen oxide free radical by inhibiting amines. To "poison" the blocked amine and thus lose its stability or function. With the development of PVC polymerization process technology and improvement of performance of PVC stabilizer effect, PVC resin for decomposition of hydrogen chloride have not enough to curb the role of hindered amine, hindered amine light stabilizer in PVC application example is given to more and more, and have achieved satisfactory effect.
Application in PVC film. The effect of HALS alone in polyvinyl chloride transparent film was the same as that of the single use of benzotriazole uv-326 or diphenylketone uv-531 stabilizer. The effect of hindered amine light stabilizer HALS and benzotriazole or diphenylketone is superior to that of three kinds of light stabilizers alone.
The research work on the application of hindered amine light stabilizer in polyvinyl chloride agricultural film was first carried out in changchun institute of applied chemistry of Chinese academy of sciences. Will be hindered amine light stabilizer 770, 622, GW - 540 and UV absorber UV - 9, UV - 531 single or compound, respectively with PVC resin by rolling to agricultural films, through artificial simulated climate accelerated aging test, natural exposure test and actual application.
It can be applied to PVC film, which can be compared with UV-531 and uv-9, which are widely used in PVC film. Will be hindered amine light stabilizer and ultraviolet absorption type light stabilizer blends with application and PVC films, although can't extend the service life of films, but the button is shed in the process of the application of the anti aging effect is better than the single use of hindered amine light and ultraviolet absorption light stabilizer; Hindered amine type light stabilizer has the effect of preventing the "backplate effect" of the shed membrane.
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.
Cas no. : 101-02-0
HS: 29209019.00
The most important index of products: colorless, yellow liquid
Density (rho) 2525:1.183-1.192, refractive index (eta 020) : 1.585 1.590, freezing point ° C: 19-24, chloride (Cl - %) : 0.20 or less
Tax refund: the current tax refund of Triphenyl phosphite is 9 percent
Raw materials: phenol, phosphorus trichloride, phosphorus trichloride.
For transparent products, light stabilizer ultraviolet absorption type or deep play a role in the inner products and hindered amine light stabilizer can play a role in the surface layer or surface, the two together to make products by comprehensive protection.
HALS is used for PVC hard products. The rigid polyvinyl chloride (PVC) impact modified piece (1 mm thick) of light stability test, determine the yellow index increase 20 units of time, adding 0.3% UV - 531 samples for 6000 hours, adding 0.3% hindered amine 770 samples of more than 7500 hours, adding hindered amine, 770 (0.15% each) and UV absorber plate is greater than 7500 hours. It is slightly better than using ultraviolet absorber alone when it is used alone or combined with ultraviolet absorbent.
The discoloration of plastic doors and Windows is common and frequently used. It is generally used to increase the whiteness of the product by adding fluorescent whitening agent and titanium dioxide to the manufacturing profile. In fact, the fluorescence whitening agent only increases the initial whiteness of the profile, and cannot maintain the whiteness for a long time. Different types of titanium dioxide from different manufacturers have different ability to resist ultraviolet radiation and maintain whiteness. High purity titanium dioxide, suitable and appropriate light stabilizer, is the basic method to improve and maintain the whiteness of profile.
Any physical state requires an exact definition. It is not easy to confuse the concept with the exact definition; Any physical state must have a quantitative standard and mathematical expression, and quantitative criteria can be used to determine whether the system is dealing with this state. So the previous problem with the study of "anti-oxygen balance" is the definition of an exact quantitative expression for the "anti-oxygen balance".
The anti - oxygen system is an internal and external anti - oxygen balance system which can continuously produce high quality products. The definition of "more suitable melt liquidity" and "better plasticizing time" is a bit of a bullshitty, but it also points out the essence of anti-oxygen balance.
Plasticizing torsional moment balance than the size of the torque is closer to the plastic, resin processing is coming to an end when the actual melt torque, also said in the plasticizing torque of material viscosity is close to the actual plastic processing at the end of the melt viscosity.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
http://www.yaruichem.com
For agricultural film, food packaging, children's toys, disposable infusion sets and other indirect or direct contact with food, medicines, medical appliances and plastic products of the body, not only should choose has passed the United States food and drug administration (FDA) inspection and license, or the European Union commission rules allow antioxidants varieties of PVC resin, and add the amount should be strictly controlled under the maximum allowable limit.
Light stabilizer UV - 326 acute oral toxicity test number LD50 > 5000mg/kg is a relatively non-toxic chemical.
It is generally believed that PVC resin is accompanied with the reaction of dehydrochlorination (HCl) during thermal processing, thermal oxidation and photooxidation degradation. Hydrochloric acid can be used to inhibit the production of reactive nitrogen oxide free radical by inhibiting amines. To "poison" the blocked amine and thus lose its stability or function. With the development of PVC polymerization process technology and improvement of performance of PVC stabilizer effect, PVC resin for decomposition of hydrogen chloride have not enough to curb the role of hindered amine, hindered amine light stabilizer in PVC application example is given to more and more, and have achieved satisfactory effect.
Application in PVC film. The effect of HALS alone in polyvinyl chloride transparent film was the same as that of the single use of benzotriazole uv-326 or diphenylketone uv-531 stabilizer. The effect of hindered amine light stabilizer HALS and benzotriazole or diphenylketone is superior to that of three kinds of light stabilizers alone.
The research work on the application of hindered amine light stabilizer in polyvinyl chloride agricultural film was first carried out in changchun institute of applied chemistry of Chinese academy of sciences. Will be hindered amine light stabilizer 770, 622, GW - 540 and UV absorber UV - 9, UV - 531 single or compound, respectively with PVC resin by rolling to agricultural films, through artificial simulated climate accelerated aging test, natural exposure test and actual application.
It can be applied to PVC film, which can be compared with UV-531 and uv-9, which are widely used in PVC film. Will be hindered amine light stabilizer and ultraviolet absorption type light stabilizer blends with application and PVC films, although can't extend the service life of films, but the button is shed in the process of the application of the anti aging effect is better than the single use of hindered amine light and ultraviolet absorption light stabilizer; Hindered amine type light stabilizer has the effect of preventing the "backplate effect" of the shed membrane.
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.
Cas no. : 101-02-0
HS: 29209019.00
The most important index of products: colorless, yellow liquid
Density (rho) 2525:1.183-1.192, refractive index (eta 020) : 1.585 1.590, freezing point ° C: 19-24, chloride (Cl - %) : 0.20 or less
Tax refund: the current tax refund of Triphenyl phosphite is 9 percent
Raw materials: phenol, phosphorus trichloride, phosphorus trichloride.
For transparent products, light stabilizer ultraviolet absorption type or deep play a role in the inner products and hindered amine light stabilizer can play a role in the surface layer or surface, the two together to make products by comprehensive protection.
HALS is used for PVC hard products. The rigid polyvinyl chloride (PVC) impact modified piece (1 mm thick) of light stability test, determine the yellow index increase 20 units of time, adding 0.3% UV - 531 samples for 6000 hours, adding 0.3% hindered amine 770 samples of more than 7500 hours, adding hindered amine, 770 (0.15% each) and UV absorber plate is greater than 7500 hours. It is slightly better than using ultraviolet absorber alone when it is used alone or combined with ultraviolet absorbent.
The discoloration of plastic doors and Windows is common and frequently used. It is generally used to increase the whiteness of the product by adding fluorescent whitening agent and titanium dioxide to the manufacturing profile. In fact, the fluorescence whitening agent only increases the initial whiteness of the profile, and cannot maintain the whiteness for a long time. Different types of titanium dioxide from different manufacturers have different ability to resist ultraviolet radiation and maintain whiteness. High purity titanium dioxide, suitable and appropriate light stabilizer, is the basic method to improve and maintain the whiteness of profile.
Any physical state requires an exact definition. It is not easy to confuse the concept with the exact definition; Any physical state must have a quantitative standard and mathematical expression, and quantitative criteria can be used to determine whether the system is dealing with this state. So the previous problem with the study of "anti-oxygen balance" is the definition of an exact quantitative expression for the "anti-oxygen balance".
The anti - oxygen system is an internal and external anti - oxygen balance system which can continuously produce high quality products. The definition of "more suitable melt liquidity" and "better plasticizing time" is a bit of a bullshitty, but it also points out the essence of anti-oxygen balance.
Plasticizing torsional moment balance than the size of the torque is closer to the plastic, resin processing is coming to an end when the actual melt torque, also said in the plasticizing torque of material viscosity is close to the actual plastic processing at the end of the melt viscosity.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
http://www.yaruichem.com
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