Shanghai Daoqin Plastics Co., Ltd.

  flame retardant reinforcement PBT广泛 application in automotive, electronics, electrical and other industry, chemical industry 引进尖端 formulation understanding technology; chemical industry from 事无卤 flame retardant reinforcement PBT formulation analysis, formed separation testing, formulation also 原, formulation testing, chemical industry is modified engineering plastics enterprise provide sleeve/set product formulation technology; terephthalic acid ester (PBT) is types crystallization, type saturated and polyester. it tool has excellent force property can, electrical property can, chemical resistant product property, easy molding and wet rate low and other features, is types comprehensive property can excellent thermoplastic property engineering plastics, by used for automotive, electronics electrical appliances manufacturing in, used for manufacturing force strong/high degree requirements relatively high parts and heat resistant, resistant impact, wear resistant parts and other, already formed is large engineering plastics in important 一员. however, pure PBT也存 in flame retardant property good (can to UL 94 HB grade), notched impact strength low, heat deflection temperature (HDT) high and other disadvantages, from made its in certain field/area application.

  glass fiber (GF) reinforcement PBT can large degree improve/increase material impact strong/high degree and heat deflection temperature (HDT). PBT flame retardant non is new 课题, its flame retardant methods has multiple,传统且 formed methods has bromine ether (DBDPE) and Sb2O3复配, flame retardant non good,也 is currently large separation flame retardant PBT using/adopting methods.

due to for ring 境污染 and safety factors day heavy 视,此 type product currently positive 面临挑战; although 欧盟2005 year 10 month already 经停止 for DBDPE made,允许 its use,不 每4 year also for its assessment,据 forecast,待现 in positive full flame retardant property assessment formed rear, also has can can by use or use. another industrial 发达国家出于 technology and certain types good, for DBDPE flame retardant in 一定偏见, therefore, although RoHS already troubleshooting DBDPE,但 world scope/range inner for environmental protection flame retardant system research 一直十 separation hot.

  environmental protection flame retardant reinforcement PBT tool has crystallization fast, easy molding, force strong/high degree high, water absorption low, dimensional stability good, electrical strong/high degree high, electrical properties good, heat resistant property 佳, chemical resistant product property good, resistant solvent agent and weather resistance good and other advantages, especially in electronics, electrical upper application,如 used for connectors, electrical appliances, 开关, and other. material also by used for dispersion hot 风扇(dispersion hot is machine inner long time 旋转以帮助 dispersion hot plant/unit, requirements material heat resistant, flame retardant, insulation and force strong/high degree high),如 by 客户广泛 used as machine outer equipment, equipment and other dispersion hot 风扇之 outer frame and 扇叶. in addition,该材 material flow property good, non combined injection molding thin and complex products, by formed used for pressure device, electrical appliances inner 绕线轴. environmental protection flame retardant reinforcement PBT以 its in insulation property, heat resistant property, resistant property, molding flow property, strong/high degree and other comprehensive advantages for its it material,如酚 aldehyde resin, PBT, nylon 6, terephthalic acid ester and other formed strong/high impact.

   terephthalic acid ester (PBT) tool has crystallization speed degree fast water absorption low electrical properties excellent temperature degree wet degree small weather resistance good chemical resistant product property excellent force property can and processing properties excellent and other advantages, as is thermoplastic property engineering plastics by application in automotive, electronics, electrical and other industry,无卤 flame retardant reinforcement PBT generally using/adopting Chang Chun, 江苏仪征化纤, 南通星辰 PBT resin

  polybutylene terephthalate (PBT) PBT以 its excellent heat resistant property, fatigue property, weather resistance, low friction coefficient and other property can, in energy saving industry in application its 广泛, very more and 玻璃灯 tube/pipe 接触部 separation temperature degree can 达180℃ above, therefore plastics very difficult meet/satisfy requirements, glass fiber reinforced composite/compounding material resistant thermal properties excellent 良, heat deflection temperature (HDT) and long use temperature degree high, can meet/satisfy energy saving heat resistant requirements,但 glass fiber reinforced PBT composite/compounding material has glass fiber (GF) outer 露, products surface coarse 糙, machine processing equipment abrasion loss heavy and other disadvantages in addition production process for reinforcement material strong/high degree effect/influence very large, machine type screw combined in block 搭配, temperature degree 设置, screw speed and other for material strong/high degree has effect/influence.

meanwhile due to PBT含 has ester 键, in high 于玻璃化 temperature degree lower water in 会发生 ester fracture, hydrolysis reaction formed acid property ring make hydrolysis reaction accelerated, property can decline effect/influence pure PBT hydrolysis most main/primary factors is 端羧基 concentrated degree, usually using/adopting reduce 端羧基 content, increase degree improve/increase PBT resin resistant hydrolysis property,但 for/regarding glass fiber reinforced flame retardant PBT system, due to flame retardant and glass fiber (GF), remove resin 基体本身, flame retardant, glass fiber (GF) and it between interface can can is effect/influence resistant hydrolysis property can main/primary causes 之一; silicon coupling agent is glass fiber reinforced PBT good compatibilizer, has improve/increase glass fiber (GF) and interface versus function,鉴于 above causes, flame retardant reinforcement PBT made generally using/adopting silicon 烷处理 glass fiber (GF).

  for/regarding nitrogen flame retardant, its flame retardant mechanism usually by is is separation its 燃烧时会 separation understanding formed acid non property liquid film, meanwhile, acid also 进一步脱 water formed acid, acid 进一步 polymerization formed poly acid poly acid is easy by stability combined material, can cover/cap in polymer surface formed film flame retardant in this process in, due to acid acid poly acid water property, make polymer in high temperature lower carbon 化, from 而隔绝空 gas, more strong/high flame retardant 效果. and, solid acid ester in polymer 燃烧时会 has PO.形 formed, it can and 火焰区域 in hydrogen 原子结 combined, to made function, another, in flame retardant process in generate water separation, 一方面 can reduce poly versus temperature degree, 另一方面 can dilute gas versus in can material concentrated degree, from more good to flame retardant function.

  polymer degradation usually is formed non property, low property large separation 子自由基;当 temperature degree rise high rear, different structure flame retardant 开始挥发 or degradation. oxygen ratio and has machine material flame retardant use, as used for can material 时, make has machine material hydrogen acid or 卤素,此产 material again and oxidation reaction generate 卤化锑酰, this combined material tool has flame retardant function

  from quality loss speed rate degree can 看出, flame retardant PBT quality loss speed rate large pure PBT quality loss speed rate. this table/sheet 明燃烧 process in, polymer quality loss rear,放出 不燃 gas 体; positive is this gas 体隔离 燃烧层 and oxygen gas 接触, make speed rate large large decrease small, from to flame retardant 目

  long 期以, polybutylene terephthalate (PBT) (PBT) flame retardant system use flame retardant is more bromine ether type combined material, its in use most more is bromine ether (DBDPO). this type of flame retardant flame retardant efficiency high, price 适宜, currently still by using/adopting. 但DBDPO in 燃烧时会 generate more bromine type and more bromine ether type, this types combined material due to its chemical structure and 二噁英 versus 似, by 怀疑燃烧 rear generate 二噁英 type material 质. new environmental protection flame retardant is important.

  市面十 bromine 二苯乙烷, bromine ring oxygen resin (BEO- 30,), bromine polystyrene (PS) masterbatch (PBT 620)三 types environmental protection flame retardant relatively commonly used; from property can 看, using/adopting bromine polystyrene (PS) masterbatch made material comprehensive property can most high, especially is electrical properties very high, this is is bromine polystyrene (PS) molecular weight high, 含游离 bromine 素, quality low, heat stabilized property good, separation understanding temperature degree high, meanwhile and resin versus property good, dispersion uniform. if flame retardant in content high, separation understanding temperature degree low, and versus property 差, processing process formed separation understanding, oxidation,必然 need effect/influence to most material force 学, electrical properties. using/adopting bromine 二苯乙烷 made 备 材 material remove notched impact strength 差一, its it property can in, using/adopting bromine ring oxygen resin made 备 材 material flow property most high,适 combined made as complex, requirements flow property high products. from flame retardant market 售价 看, bromine polystyrene (PS) masterbatch, bromine ring oxygen resin relatively high; bromine 二苯乙烷 is most 便宜, comprehensive 考虑十 bromine 二苯乙烷不 belongs to more bromine ether,燃烧时不 generate more bromine and more bromine ether, can 代替DBDPO as is PBT flame retardant; bromine 二苯乙烷 and Sb2O3组 formed flame retardant system in ratio large is 2. 25:1,协效 flame retardant use amount in 13份 left right can to UL 94 V- 0 grade flame retardant 效果.

  toughening agent and resin has relatively good versus property, toughening agent add can has increase material notched impact strength. flame retardant reinforcement PBT材 material in commonly used toughening agent is GMA(methacrylic acid sink marks ester) grafting POE and (ethylene / acrylic ester / methacrylic acid sink marks ester) copolymer -AX8900

GMA grafting POE upper ring oxygen main/primary and PBT 羧基进行 reaction, from formed PBT-GMA-POE grafting material. in impact fracture process in can more more and 剪切屈服 deformation,也 will absorption more more impact can, from 而 抵偿因添 add flame retardant 引起 材 material notched impact strength separation 丧失.

  add toughening agent ratio add toughening agent environmental protection flame retardant reinforcement PBT tensile strength and flexural strength has reduce,但 using/adopting AX8900 is toughening agent material ratio using/adopting grafting PE need good 一. AX8900 is (ethylene / acrylic ester / methacrylic acid sink marks ester) copolymer, sink marks ester and very more chemical 基团都 has high reaction active property,如- COOH, -OH, - NH2. AX8900 含 active property can ratio grafting PE active property need large more, therefore and flame retardant, GF versus interface combined force relatively grafting PE large, therefore strong/high degree relatively high 一. AX8900 ratio grafting PE in PBT in dispersion need more is uniform, its 玻璃化转变 temperature degree ratio grafting PE low, therefore improvement material tough property good grafting PE. add amount is 2份 property can most excellent.

  1)先 will glass fiber (GF) in 10% NaOH solvent liquid 浸洗1h并 in 100℃烘 dry, rear will glass fiber (GF) add to high speed device in, amount coupling agent formed 2% solvent liquid, add to glass fiber (GF) in, high speed 搅拌2~3min, fiber in 120℃烘2h, made modified glass fiber (GF)

  2) will dry PBT and flame retardant, toughening agent according to ratio in high mixed machine in mixed combined, rear add resistant oxidation agent and modified additives, mixed combined uniform, again in KS-36 type di screw extrusion machine in and glass fiber melt extrusion pelletizing, extrusion temperature degree is 220~260℃ plastics pellets using/adopting SZ-550NB injection molding mechanism 样

  3) processing process:

   injection molding conditions: material temperature degree 245℃, mold temperature degree 60℃,

   holding pressure time 15s, cooling 12s, 充模5s

  bending property can 按GB/T9341-2000 testing;

  property can 按ANSI/ UL 94-2003 testing.

  hot speed rate, has 效燃烧 hot and quality loss speed rate 按ASTME-1354 testing;

  oxygen index (LOI) 按GB/T2406-1993 testing;

  impact property can 按GB/T1043-1993 testing;

  tensile property can 按GB/T1040-1992 testing;

  melt quality flow speed rate (MFR)按GB/T3682-1983(1989)测定.

  30% glass fiber reinforced flame retardant PBT参考 formulation (该 formulation 仅供参考)