Shanghai Daoqin Plastics Co., Ltd.

antioxidant also resistant oxidation agent and anti agent, is types can polymer oxidation aging chemical material 质. it a small amount of in polymer system in 时, can or made polymer oxidation process, from anti polymer aging, long its use lifespan. therefore widely used in 橡胶, plastics, polymer/macromolecule material, chemical industry and food processing and other field/area. that how to selection resistant oxidation agent 时, 该考虑 which issues 呢? lower Shanghai chemical industry to large furniture introduction lower.

selection antioxidant 时, according to plastics material types type and Model/Grade, processing equipment and process conditions, other chemical additives product types and use amount, product use ring and and other comprehensive factors antioxidant product types. selection industrial use antioxidant, basic upper attention/notes below/following issues.

resistant oxidation agent generate color 污染, remove type antioxidant is 无污染 antioxidant, can used for color or shallow color polymer products, has 时也会发生泛黄 and other color 污染. amine type antioxidant efficiency high, color property strong/high, large, suitable for shallow color product, in industrial in to application, has can add 入一 亚磷 acid ester or material 克服变 color.

指 resistant oxidation agent for light, hot, oxygen gas and water stability property. antioxidant in plastics material in maintain stability, it in high temperature processing and use ring process in 应挥发 loss relatively less, color or color, separation understanding, and other additives defect chemical reaction, 不腐蚀 machine equipment, easy by product surface other material 质萃取. retardant amine type light stabilizer generally is low alkali property product. in plastics material in use retardant amine as is light stabilizer 时, formulation in 不应包含 other acid property additives, versus plastics products 也不应 in acid property ring in use.

1） antioxidant meet/satisfy combined formed and molding conditions requirements, large more antioxidant in 300-320℃ lower tool has short heat stabilized property.

2） amine type resistant oxidation agent in light and oxygen function lower 会发生变 color, its color degree amine type different in 差异.

3）就 resistant oxidation agent oxidation property 而言, for amine material ratio 烷基化二苯 amine more 敏感.

4） add hot conditions lower, retardant in acid property material function lower 会发生脱烃 reaction, resistant oxidation efficiency decline.

5）亚磷 acid ester type resistant oxidation agent easy hydrolysis.

combined formed stage/phase need add antioxidant 时, can will its solvent understanding in mono or polymerization solvent agent rear add, can solvent understanding in acid ester or ether and other antioxidant rear add. for/regarding ABS emulsion polymerization process, antioxidant can emulsification rear again use, 但应适当 attention/notes in water or other solvent agent in solvent understanding degree, especially is used as outer use product and day commonly used product 时.

versus property is antioxidant important indicators, it 取决于 antioxidant chemical structure, polymer/macromolecule combined material types type, temperature degree and other. versus property 差会造 formed 结霜, this is is resistant oxidation agent in polymer/macromolecule combined material in saturated and, to surface.

1） versus property

plastics polymer polymer property very strong/high, antioxidant and light stabilizer separation tool has different degree property, therefore versus property relatively 差. usually antioxidant and light stabilizer in high temperature lower and polymer melt combined, polymer solid antioxidant and light stabilizer separation in polymer separation versus 容. in formulation use amount scope/range inner, antioxidant and light stabilizer need in processing temperature degree lower 熔化, need especially attention/notes, in design formulation 时, solid antioxidant and light stabilizer melting point or melt scope/range upper 限不应 low plastics polymer processing temperature degree. research 证明, polymer 晶区球晶 interface non versus is polymer in easy oxidation separation, solvent understanding property good resistant oxidation agent good in in polymer need it 们 区域.

2） flow property

plastics products especially is small ratio surface 积体积 ratio plastics products oxidation main/primary in products surface, need antioxidant and light stabilizer from plastics products internal to products surface. if toward product surface speed degree fast, amount large, antioxidant and light stabilizer 就会挥发 to product surface ring in, or expand dispersion agent in and product surface other in 丢失. this type of loss 失实际 upper is can 避免, in design formulation 时就应该 add 以考虑. in selection antioxidant and light stabilizer 时, selection versus for separation quality relatively large, melting point high product types, antioxidant and light stabilizer, use amount made application in understanding use ring front lower 确定.

plastics products processing 时, add antioxidant and light stabilizer can can 会改变 resin viscosity and screw 转矩. if antioxidant and light stabilizer for resin melt scope/range versus relatively large, 就会出现 antioxidant and light stabilizer or screw made phenomenon. antioxidant and light stabilizer melting point low processing temperature degree 100℃ above 时, will antioxidant and light stabilizer made formed masterbatch, again and resin mixed combined processing product, 以避免 antioxidant distribution 不均以 and due to 偏流导致 processing output/production volume decline.

resistant oxidation agent selection and polymer/macromolecule combined material structure related, different structure tool has different resistant oxidation can force. polyolefin especially is PP for oxidation non 常敏感, therefore in front combined formed process in need add resistant oxidation agent. in addition, polyolefin hot oxidation degradation is according to 自由基链式 reaction mechanism 进行, its in in material oxidation hydrogen can through tool has catalytic active property metal function accelerated, oxidation degradation speed rate more fast. polyolefin and copper or copper alloy 直接接触 or use other has catalytic active property metal additives 时, 应考虑 add copper made agent and antioxidant combined. metal agent must used for has saturated and di electroplating and fiber 素衍生 material.

large more 数二烯橡胶 tool has relatively high oxidation property, low system 硫化橡胶 ratio high system tool has good resistant oxidation property good, property structure polymer/macromolecule combined material ratio structure resistant oxygen property can more good. versus for separation quality distribution wide, easy oxidation and other and other, in addition temperature degree high, oxidation degradation heavy. therefore, selection resistant oxidation agent is or low 毒, or low 尘, in plastics products processing, manufacturing and use process in, for and material has effect/influence, for gas, and water system 无污染.