白炭黑輪胎胎面膠加工

Processing

ofSilicaTreadCompounds

白炭黑輪胎胎面膠的加工Dr.LotharSteger/RheinChemieRheinauGmbH[Folie:1

]Whysilicacompounds?

為何要用白炭黑胎面？Byapplyingsilicainsteadofcarbonblackintiretreadcompoundsthefollowingresultscanbeachieved:用白炭黑代替炭黑具有如下優(yōu)越性能：muchlowerrollingresistanceofthetire輪胎滾動損失降低很多muchbettericeandsnowperformance抗冰滑和抗雪滑行能優(yōu)越很多muchbetterwetskidbehaviour抗?jié)窕阅芨纳坪芏郺tsimilartreadwearpatterns具有相近的耐磨性ABS-brakeworksonlywithsilicaonthewetroad2PropertiesofSilicawithrespectto

CarbonBlack白炭黑與炭黑的性能對比抗?jié)窕寡?冰滑滾動阻力耐磨性3Historyofsilicatechnology白炭黑技術(shù)發(fā)展簡史1974 BluesilicatiredeveloppedbyMetzeler/Germany

HighloadingofsilicaandBR,noS-SBRavailable, insufficientprocessingequipmentandknowhow1975 Metzlerstoppedproductionofbluetire1980- severaldevelopments:silanes,rubbers,1990 processingequipmentandprocessingknowhow1992 PatentonGreenTireofMichelin/France

S-SBR,lesssilicaandBR,improvedprocessing

equipmentandprocedures2000 Stateoftheartsilicatireachievesupto30% improvementofphysicalpropertiesbuthas remarkableprocessingdeficiencies40255075100125Abrasion耐磨性Grip抓著力Rolling

resistance滾動阻力EuropaJapanUSAGlobalTireRequirements全球輪胎性能要求歐洲日本美國5RequirementsMadeonPassengerCarTires

inEurope,theUSA,andAsia不同地區(qū)對承用胎的要求模式Source:BMW,Michelin,Goodyear,Continental6Contents

內(nèi)容Why

is

silica

increasingly

being

usedintire

application?

為何白炭黑在輪胎上的應(yīng)用不斷增加？By

what

meansdosilica

compounds

differ

from

carbon

black

compoundsinthe

mill

room

?在混煉車間借助什么工具區(qū)別白炭黑與炭黑7DifferentTreadConcepts不同胎面概念8Rubbers(S-SBR)溶聚丁苯橡膠 100 phr

Silica(HDSi)高分散白炭黑 70 phr

Silane

硅烷偶聯(lián)劑 6 phr

Processoil操作油 10 phr

ProcessingPromoter加工助劑 5 phrStearicacid硬脂酸 2 phrZinkoxide氧化鋅 3 phr

Curingsystem硫化體系 5 phr

Antioxydants 抗氧劑 6 phr

Silicareplacescarbonblackcompletely.白炭黑幾乎完全取代炭黑

Silaneactsasacouplingagentbetweensilica

andS-SBR.硅烷作為白炭黑和溶聚丁苯橡膠的偶聯(lián)劑BasicSilicaCompound白炭黑胎面膠基本組成9(V)SLxy-0(V)SLxy-1(V)SLxy-1HMSi-coupledStyrene[%]401030020Vinyl[%]03020105040-70°C-60°C-50°C-40°C-30°C-20°C-10°C0°C+10°CVSL2540-1HMVSL5025-1HMVSL5025-1VSL5525-1SL23,5-0VSL5025-0HM50SL23,5-1SL18-0VSL2525-0MLanxessS-SBRRange朗盛化學(xué)溶聚丁苯橡膠100255075100125150ProcessingTensilestrengthHardness@70°CTearresistanceDINabrasiontand@0°Ctand@60°C5025-05025-0HM5025-15025-1HMS-SBRTypeswithdifferentmolecularweight不同分子量的S-SBR加工性拉伸強度硬度撕裂強度耐磨性11100Index0100phrBRphrS-SBR110120130140150901090208030704060Wear耐磨性tandelta60°Cwetgrip濕抓著性Passengertiretread,?greentire承用胎面‘綠色輪胎’-S-SBR/highcisBR用溶聚丁苯/順丁橡膠BR并用InfluenceofBRinsilicacompounds順丁橡膠在白炭黑膠料中的作用12Typicalvalues典型指標(biāo):CAS-RN112926-00-8Ultrasil7000–HD-Silica/Degussa德固薩高分散白炭黑13ProcessingPromoter

forSilicaTreadCompounds

用于白炭黑胎面膠的加工助劑Aktiplast?STAktiplastGTAfluxGE183714AdvantagesofProcessingpromotersinS-SBR/silica白炭黑分散助劑用于白炭黑膠料的優(yōu)點Reducedcompoundviscosities降低混煉膠粘度Improvedflowpropertiesinextrusion改善擠出流動性Improvedflowpropertiesinmolding

改善模壓流動性Anti-stickyeffect具有防粘效果Improvedfillerdispersion.改善填料分散Lowerenergyuseinextrusionandcalandering降低擠出壓延能耗Optimizedcompoundprocessingwithoutnegativeeffecton

productperformance15ConsiderationsWhenUsingSilica/Silane

Technology白炭黑/硅烷技術(shù)應(yīng)用原理1.Moremixingisneededinnon-productivestepscomparedtoallcarbonblackcompounds

需要更多的混煉段數(shù)2.Temperaturecontrolisimportant—Don’t

betoohighortoolow

混煉溫度既不能太高也不能太低3.TESPT(Si-69)havealimitof160℃of

processing

Si-69混煉溫度不得超過160℃4.TESPD(Si-75)enablebetterprocessing

qualityandspeed

Si-75混煉溫度不得超過170℃

★

Slightlymorecoverageforthesameweightofsilane

★

Higherprocessingtemperaturesarepossible,typicallyupto170℃,sosilanizationreactionreachesmorecompletionsooner

★

Itispossibletoimprovemixingtimesby25to50%16

HydrophylSilica吸水性白炭黑

desiredforagoodsilicadispersion需要良好的白炭黑分散

Highlyreinforcing:高補強性 -->Yieldstress產(chǎn)生屈服應(yīng)力

Veryhighviscosity很高粘度

Littleextrudateshrinkage

很小的擠出收縮

HydrophobeSilica憎水性白炭黑

Hydrophobationistheresultofthefirstcouplingreactionbetweensilicaandsilane

憎水是白炭黑與硅烷偶聯(lián)反應(yīng)的結(jié)果 Notreinforcing:noYieldstress無補強性，無屈服應(yīng)力

Lowviscosity低粘度 Extremeextrudateshinkage /highextrudateswell高擠出脹大白炭黑品種與特性17Thechemicalreactionbetweensilicaandrubber白炭黑與橡膠之間的化學(xué)反應(yīng)18Mooneyviscosity

門尼粘度Dynamics動態(tài)性能G’littleamplitude小振幅彈性模量G’bigamplitude

大振幅彈性模量“Payne”-effect

Payne效應(yīng)Silica-dispersion

白炭黑分散 Silanisationgradehigh= MooneyandG‘low.

硅烷化反應(yīng)程度越高 =門尼粘度和彈性模量越低Testofsilanisationgrade硅烷化反應(yīng)程度的測定19Descriptionofthedispersionprocessduringmixing

混煉期間的白炭黑分散Descriptionofthesilanisationprocess

硅烷化反應(yīng)過程Establishmentofanyinteractionbetween

dispersionandsilanisation

白炭黑分散和硅烷化反應(yīng)之間的相互作用Determiningthemostimportantprocessparameters測定最重要的加工參數(shù)Mixingofsilicacompounds白炭黑膠料的混煉20degreeofdispersionisachievedinanearlymixingstage

在前段混煉中已經(jīng)獲得優(yōu)良的分散度degreeofdispersiondeterminatesfinaldegreeofsilanisation

分散度確定了最終的硅烷化反應(yīng)程度Longermixingtimesyieldhigherdegreeofsilanisation

較長的混煉