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light stabilizer function and application has which ？
Date: 2026-04-10 21:21
Views: 398
Source: Internet
一, light stabilizer and classification
我们都知道, plastics in processing and use process in, to light, hot, oxidation and other inner outer factors effect/influence, it 会发生 degradation or crosslinked, make its property can 变差, appearance 发黄, most use value. 但发生 aging most main/primary causes is this material absorption light can, especially is outer 线, rear generate light chemical reaction and oxidation reaction, light degradation, make product appearance and material mechanical properties 变差, this process by is oxygen aging or light aging, is light oxidation degradation or light degradation. light stabilizer function mechanism can separation is light agent, outer absorption agent, agent and 自由基捕集基团四 large type （ its in, retardant amine light stabilizer is 自由基捕集 agent in most main/primary types ）. light stabilizer chemical structure classification, its market 份额顺序 is retardant amine, 二苯甲 ketone, water acid, acrylic ester and other.
二, excellent light stabilizer necessary conditions
1. can has absorption or 反射290～400nm波 long scope/range inner outer light, or can slip by separation can amount, has 足够 捕捉自由基 and separation understanding oxidation hydrogen can force, can has made outer light for material light degradation effect/influence, for material light degradation and material has property can and processing properties defect effect/influence.
2. and target/goal material versus property good, processing use process in 不喷霜, water.
3.自身 stability property good, in processing use process in heat stabilized property high, hot loss less.
4. can light absorption rate low, color, color, light stabilization property good, long time lower 也不会受 to loss 伤.
5. chemical stability property good, and material in other formed separation and ring in other material 质发生 defect chemical reaction.
6.不 and other material 发生迁移, especially is for material and product.
7. and other processing additives has function, 而无反协同 reaction, for material processing machine 械无腐蚀 function.
8.材 material processing, manufacturing and use process in or low 毒, for 人体无 and material 无害, for ring 境无污染, has good material degradation property and degradation property.
9.无 powder or low powder 尘, use and amount 方便, price low 廉, suitable scope/range 广.
10. easy in material material in solvent understanding and dispersion.
light stabilizer as used for many combined material, it can combined upper requirements product very less, above conditions can in selection light stabilizer 时考虑, according to processing material types type and Model/Grade, other additives product types, product applications and requirements, processing equipment and process, comprehensive various light stabilizer excellent poor, most selection types light stabilizer, or 者两 甚至 more more small light stabilizer use, from 而发挥 different advantages, in material light oxidation different stage/phase is product provide more heavy 保护, make product lightfast aging lifespan formed growth, is or 几十倍.
三, light stabilizer in polyethylene (PE) in formulation
1. formulation 一: low density polyethylene (PE) （100）, UV-531（0.25）, UV-327（-）, GW-540（-）, light stabilizer -2002（0.25）, antioxidant 1010（-）
2. formulation 二: low density polyethylene (PE) （100）, UV-531（-）, UV-327（0.2）, GW-540（-）, light stabilizer -2002（0.2）, antioxidant 1010（-）
3. formulation 三: low density polyethylene (PE) （100）, UV-531（-）, UV-327（-）, GW-540（0.3）, light stabilizer -2002（-）, antioxidant 1010（0.1）
its in formulation blow molding （0.12+_0.02）mm thick polyethylene (PE) film, in 北京 区 use, 自然曝晒一 year, its long rate is toward 85.1％, toward 89％, formulation blow molding （0.12+_0.02）mm thick polyethylene (PE) film, in 北京 区 use, 自然曝晒12 month, its long rate is toward 83％, toward 95％, formulation blow molding （0.12+_0.02）mm thick polyethylene (PE) film, in 北京 区 use, 自然曝晒12 month, its long rate is toward 64.1％, toward is 78.2％.
四, light stabilizer polyethylene (PE) in application
polyethylene (PE) material for outer light absorption can force relatively low, upper easy generate light chemical reaction, 但实际 upper in polymerization processing process in, formed a small amount of hydrogen oxidation material and structure in has 羰基 杂质, and generate aging, aging for polyethylene (PE) material property can effect/influence also is very large, therefore, improve/increase its resistant aging property can important. polyethylene (PE) resin in cationic light lower oxidation, belongs to 自由基链式 reaction. is decrease resin light oxidation, need add light stabilizer retardant 断连续 链式 reaction. “ pure ” polyethylene (PE) saturated and structure easy absorption long large 于300nm outer 线. due to types types causes, used for polymerization, hot processing and outer use, make a small amount of saturated and di structure, 支化点, catalytic agent and other can by oxidation low and tool has function 羰基发 color 团. light absorption outer light and 羰基声发 color rear oxidation low, absorption outer rear electronics 激发态, toward oxygen separation 子传递 can amount, formed mono heavy oxygen, mono heavy oxygen and polyethylene (PE) separation in saturated and reaction, formed large separation hydrogen oxidation material, hydrogen oxidation material absorption outer rear separation understanding, its separation understanding speed degree fast its formed speed degree, generate catalytic 自由基 reaction process, formed a large amount of poly 集, absorption outer rear again 次引起 separation understanding fracture, polyethylene (PE) in light degradation process in 也发生 crosslinked reaction. due to oxygen in polymer non expand dispersion speed rate ratio fast, outer 线照射 polymer non 晶区时 separation 子链段 more easy crosslinked, therefore polyethylene (PE) film thick degree and crystallization degree reduce 时, separation crosslinked increase, promote non 晶区凝胶 形 formed.
五, light stabilizer in polypropylene (PP) in application
polypropylene (PP) light degradation is light and hot function 引起, cationic light in outer tool has bad polymer chemical or 引发自动 oxidation degradation reaction can amount, from make polypropylene (PP) separation fracture, formed 自由基 or separation 子, formed hydrogen oxidation material or 羰基化 combined material or crosslinked, 随 羰基 content increase, polypropylene (PP) more easy light degradation. light and oxygen degradation reaction not only product appearance, also make its material mechanical properties 变差, most make its use function. therefore, is made light degradation, usually in polypropylene (PP) resin in add light stabilizer. polypropylene (PP) is development most fast combined formed resin product types 之一, and its it thermoplastic property plastics versus ratio, polypropylene (PP) tool has good material force property can and processing properties, its products applications more 广, price versus for relatively low.
我们 in outer use polypropylene (PP) 烯烃材 material main applications polypropylene (PP) fiber, polypropylene (PP) decoration sheet/plate and other engineering product. its in, polypropylene (PP) fiber for light stabilizer requirements most high, meet/satisfy polypropylene (PP) fiber requirements light stabilizer can meet/satisfy polypropylene (PP) decoration sheet/plate and other engineering product requirements. is made light degradation reaction issues, 我们常 in polypropylene (PP) resin in add light stabilizer, light agent, outer absorption agent, 自由基捕集 agent and other.
in more light stabilizer in, retardant amine type light stabilizer for polypropylene (PP) stability efficiency most high, especially is versus for separation quality relatively high retardant amine type light stabilizer for thin polypropylene (PP) product stability 化效果 most high. 二苯甲 ketone and polypropylene (PP) tool has good versus property, widely used in polypropylene (PP) product in. in polypropylene (PP) product in, especially is large ratio surface 积体积 ratio product, fiber, film and other, has machine combined material performance excellent light stabilizer 效果. absorption property light stabilizer has property product thick degree thin large large reduce. new type retardant amine type light stabilizer in polypropylene (PP) in has stability 化效果, especially is and absorption light stabilizer use 时, more 佳. in selection retardant amine light stabilizer 时, need 考虑受 retardant amine type light stabilizer heat stabilized property can meet/satisfy polymer processing temperature degree requirements.
therefore, retardant amine type light stabilizer polymer/macromolecule amount and more function 备受业界关注, improve/increase retardant amine type light stabilizer heat stabilized property, and resin versus property, resistant property and resistant property, reduce property and property already formed is important development direction and trend. for/regarding retardant amine type light stabilizer, use 捕获自由基 mechanism can understanding its function. it is types 捕集自由基 more function stabilizer, through hydrogen oxidation material separation understanding, 激发态 separation 子 猝灭, metal 离子 钝化 and other mechanism to polymer light stabilization property 目.
