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Free radical scavenger
by：CSSSLD
2021-01-23
To several kinds of uv absorbent composite effect, its effect than single use has greatly improved, such as often and quenching agent and uv absorber, light stability effect is significantly improved, because the uv absorber can't be all the harmful ultraviolet (uv) absorption, quenching agent can eliminate this part was not absorb uv damage to the material.
Thin plastic products processing and fiber requirements to join the ultraviolet absorption concentration is higher, thick products is low.
hindered amine light stabilizer is now recognized as efficient light stabilizer. Although stability mechanism has not been unified, hindered amine as free radical scavenger and please peroxide decomposition agent function is no doubt. PDS is convergent, hindered amine light stabilizer for styrene - chemical name Methyl acrylate copolymer. PDS has good compatibility with polyolefin, due to the high relative molecular mass, extraction resistance performance is good, the thickness effect is small, ruling tasteless, can be used for PP, PE, PS, coating, rubber light stabilizer.
hindered amine light stabilizer and glucosinolates propionic acid and lipid peroxide decomposition agent, light stability decreases, but the type and absorption of light stabilizers and, have a good synergy. All kinds of light stabilizer have different mechanism of action. In practice, sometimes add a light stabilizer can not meet the requirements, can consider to join two or more different mechanism of light stabilizer, can complement each other, synergistic stable optical system.
the ideal light stabilizer should have good light stability, good compatibility with polymer, good thermal stability, not with plastic material or other component adverse reactions, no pollution products, non-toxic or low toxicity, and the price is low. None of the actual light stabilizer which can satisfy all the above conditions at the same time, can only choose according to the performance and use requirements of the products. Additional, choose a light stabilizer and other issues should be paid attention to.
sensitive wavelengths of the resin and the effective absorption wavelength of ultraviolet ray absorber, the consistency of the resin is sensitive to uv wavelength is peculiar to itself. Choose light stabilizer, this part should be chosen to reflect or absorb the sensitive wavelengths of light stabilizer, namely the sensitive wavelengths of the resin and the effective absorption wavelength of ultraviolet ray absorber is consistency. Due to ultraviolet ray absorbent absorbs energy, increase the likelihood of hot products, therefore must be considered while adding antioxidant and heat stabilizer, require a synergy between the three.
free radical scavenger is a class of new development in recent years has space steric effect of biological kind of light stabilizer, hindered amine light stabilizer for short. Such compounds are almost not absorb ultraviolet light, but the decomposition peroxide through capture free radicals, and transfer the excited state energy, give the stability of the polymers. Light screening agent, ultraviolet absorbent and quenching agent of stable process are to prevent light trigger Angle to sexual function, stable polymer light and free radical scavenger, as the fourth line of defense, scavenging free radicals, to cut off the autooxidation chain reaction the way of light stability.
light screening agent ZnO can improve the service life of outdoor of PP, if with antioxidant 1010 zhu, auxiliary antioxidant DSTP and uv absorber triazine class and use, effect is better. And as carbon black light screening agent and sulphur ester antioxidant with applied to the stability of the system, the PE with synergy, can obtain good effect. Should pay attention to is that some injection molding processing AIDS should not be used, such as carbon black and amine, phenolic antioxidants and use, can produce against the role, to weaken the original stable effect each other.
more excellent articles: the application of antioxidant, click directly.
http://www。 csssld。 cn//html/2018/Info_0203/724。 HTML
changshu smoothly da plastic products factory website: http://www. csssld。 Cn /
more wonderful articles, immediately search: changshu da plastic products factory smoothly
hindered amine light stabilizer is now recognized as efficient light stabilizer. Although stability mechanism has not been unified, hindered amine as free radical scavenger and please peroxide decomposition agent function is no doubt. PDS is convergent, hindered amine light stabilizer for styrene - chemical name Methyl acrylate copolymer. PDS has good compatibility with polyolefin, due to the high relative molecular mass, extraction resistance performance is good, the thickness effect is small, ruling tasteless, can be used for PP, PE, PS, coating, rubber light stabilizer.
hindered amine light stabilizer and glucosinolates propionic acid and lipid peroxide decomposition agent, light stability decreases, but the type and absorption of light stabilizers and, have a good synergy. All kinds of light stabilizer have different mechanism of action. In practice, sometimes add a light stabilizer can not meet the requirements, can consider to join two or more different mechanism of light stabilizer, can complement each other, synergistic stable optical system.
the ideal light stabilizer should have good light stability, good compatibility with polymer, good thermal stability, not with plastic material or other component adverse reactions, no pollution products, non-toxic or low toxicity, and the price is low. None of the actual light stabilizer which can satisfy all the above conditions at the same time, can only choose according to the performance and use requirements of the products. Additional, choose a light stabilizer and other issues should be paid attention to.
sensitive wavelengths of the resin and the effective absorption wavelength of ultraviolet ray absorber, the consistency of the resin is sensitive to uv wavelength is peculiar to itself. Choose light stabilizer, this part should be chosen to reflect or absorb the sensitive wavelengths of light stabilizer, namely the sensitive wavelengths of the resin and the effective absorption wavelength of ultraviolet ray absorber is consistency. Due to ultraviolet ray absorbent absorbs energy, increase the likelihood of hot products, therefore must be considered while adding antioxidant and heat stabilizer, require a synergy between the three.
free radical scavenger is a class of new development in recent years has space steric effect of biological kind of light stabilizer, hindered amine light stabilizer for short. Such compounds are almost not absorb ultraviolet light, but the decomposition peroxide through capture free radicals, and transfer the excited state energy, give the stability of the polymers. Light screening agent, ultraviolet absorbent and quenching agent of stable process are to prevent light trigger Angle to sexual function, stable polymer light and free radical scavenger, as the fourth line of defense, scavenging free radicals, to cut off the autooxidation chain reaction the way of light stability.
light screening agent ZnO can improve the service life of outdoor of PP, if with antioxidant 1010 zhu, auxiliary antioxidant DSTP and uv absorber triazine class and use, effect is better. And as carbon black light screening agent and sulphur ester antioxidant with applied to the stability of the system, the PE with synergy, can obtain good effect. Should pay attention to is that some injection molding processing AIDS should not be used, such as carbon black and amine, phenolic antioxidants and use, can produce against the role, to weaken the original stable effect each other.
more excellent articles: the application of antioxidant, click directly.
http://www。 csssld。 cn//html/2018/Info_0203/724。 HTML
changshu smoothly da plastic products factory website: http://www. csssld。 Cn /
more wonderful articles, immediately search: changshu da plastic products factory smoothly
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