Polyether hloov silicone roj, tseem hu ua polyether hloov polysiloxane, yog cov feem ntau tsim thiab dav siv hom hloov silicone roj hauv kev lag luam organosilicon. Vim tias nws cov qauv molecular muaj ob pawg hydrophobic thiab hydrophilic, polyether hloov silicone roj nthuav tawm cov khoom surfactant.
Hom qauv ntawm polyether silicone roj
(1) Sab saw hom (hom feem ntau)
(2) Ob- hom kawg
(3) Sab saw, ob- kawg hom
(4) Ib - hom kawg
Hauv chav tsev polyether C2H4O)a (C3H6O) bR, muaj qhov sib npaug ntawm hydrophilicity thiab hydrophobicity ntawm a thiab b.
Txhawm rau tswj nws cov dej num saum npoo, qhov piv ntawm b / (a + b) feem ntau tswj ntawm 0.2 thiab 0.8. Ntawd yog, thaum b/(a+b) tsawg dua 0.2, lub hydrophilicity muaj zog, thiab cov hydrophilic-lipophilic tshuav nyiaj li cas (HLB) tus nqi yog loj; thaum b/(a+b) ntau dua 0.8, lub hydrophobicity muaj zog, thiab tus nqi HLB yog me me. Qhov nruab nrab molar pawg ntawm cov ntu polyether feem ntau tswj ntawm 500 thiab 5000 g·mol⁻¹. Hauv qab 500 g·mol⁻¹, qhov kev ua haujlwm saum npoo tsis tuaj yeem ua tiav, thaum siab dua 5000 g·mol⁻¹, viscosity siab dhau, ua rau tsis zoo dispersibility.
Daim ntawv thov thaj chaw ntawm polyether silicone roj
Ib. Polyurethane ua npuas ncauj stabilizer
Kuj tseem hu ua foam leveler.
Hauv kev tsim cov ntaub ntawv polyurethane ua npuas ncauj, qhov sib ntxiv yog 0.5% ~ 2.0% ntawm polyol. Nws muaj plaub txoj haujlwm:
1. Nws ua raws li emulsifier thaum lub sij hawm sib xyaw ntawm cov khoom sib xyaw.
Cov khoom siv tseem ceeb, polyether polyol, tsis zoo sib xws nrog isocyanate. Cov pab pawg hydrophobic ntawm polyether- hloov silicone roj yog soluble nyob rau hauv isocyanate, thaum lub hydrophilic pawg yog soluble nyob rau hauv polyether polyol, yog li pab nyob rau hauv kev sib tov thiab emulsification ntawm ob lub Cheebtsam. Qhov no tso cai rau cov tshuaj tiv thaiv pib ib txhij thoob plaws hauv tag nrho cov kab ke.
2. Qhov no pab txhawb kev tsim npuas thiab homogenization.
Nws txo qis qhov nro ntawm cov tshuaj tiv thaiv kab mob, tso cai rau huab cua kom tawg mus rau hauv lub cev li niaj hnub, zoo npuas, tsim me npuas nuclei. Cov pa roj carbon dioxide uas tsim nyob rau hauv cov tshuaj tiv thaiv thiab cov roj uas tsim los ntawm tus neeg sawv cev foaming yooj yim nkag mus rau hauv lub npuas nuclei los ua npuas, thiab qhov tsis tshua muaj qhov nro ntawm lub zog ntawm lub sijhawm no yog qhov zoo rau kev loj hlob npuas.
3. Nws stabilizes npuas.
Ua ntej qhov system viscosity nce mus txog ib theem, cov txheej txheem ua npuas ncauj - kua zaj duab xis yog nyias heev. Vim cov kua dej, coalescence, thiab txhua yam cuam tshuam, cov npuas phab ntsa tuaj yeem tawg. Nyob rau ntawm lub sijhawm no, polyether- hloov pauv cov roj silicone tuaj yeem ua kom cov npuas nuclei ruaj khov los ntawm Gibbs- cov nyhuv Marangoni, txo cov dej ntws tawm ntawm phab ntsa npuas thiab tiv thaiv npuas coalescence. Tsis tas li ntawd, qhov nonionic xwm ntawm polyether- hloov silicone roj tuaj yeem txo cov van der Waals rog ntawm ob qhov chaw zaj duab xis ntawm cov pa roj-kua interface, kuj ua rau muaj npuas ruaj khov.
4. Qhov kawg theem ntawm polyurethane hloov tau yooj yim ua npuas ncauj yog kev sib tshuam ntawm cov npuas cores.
Ua ntej cov npuas cores tau nthuav dav, lawv raug kaw polyhedra hauv cov tshuaj tiv thaiv. Tsuas yog ua ntej gelation tshwm sim, qhov kub thiab txias ntxiv tuaj yeem ua rau cov phab ntsa hauv cov npuas npuas tawg thiab qhib qhov hws. Lub luag haujlwm ntawm polyether- hloov cov roj silicone yog kom ruaj khov ntawm phab ntsa zaj duab xis thaum lub sij hawm tsis tshua muaj viscosity thiab tso cai rau cov yeeb yaj kiab kom ncav cuag lub thickness tseem ceeb rau qhib qhov pores, yog li tsim cov xwm txheej rau qhov qhib kawg.
Polyether- hloov silicone roj yog qhov zoo tshaj plaws stabilizer nyob rau hauv ib qho - kauj ruam tsim cov polyurethane hloov tau ua npuas ncauj.
Cov polyether- hloov silicone roj siv rau hauv cov ntaub ntawv ua npuas ncauj nruj muaj qhov qis qis dua li cov khoom siv ua npuas ncauj hloov tau, qhov loj dua C2H4O rau C3H6O piv rau hauv cov ntu polyether, thiab cov huab cua siab dua.
Cov ntaub ntawv ua npuas ncauj siv ntau yam khoom siv raw, suav nrog polyether polyols thiab isocyanates, ua rau muaj ntau hom foaming formulations. Tsis tas li ntawd, txhawm rau txhawm rau txhawm rau ntawm - qhov chaw ua npuas dej, lawv feem ntau yog tsim nyob rau hauv ob daim ntawv sib xyaw ua ke, uas yuav tsum tau siv sijhawm ntev - khaws cia. Yog li ntawd, cov npuas dej stabilizer yuav tsum yog ib qho tsis yog -ionic polyether- hloov silicone roj, feem ntau ntxiv ntawm qhov sib piv ntawm 0.5 mus rau 1.5 feem polyether polyol rau 100 feem polyether polyol. Lub foaming formulation yog kho raws li lub foaming tej yam kev mob.
Hauv ib nrab- cov ntaub ntawv ua npuas ncauj nruj, stabilizers tiv thaiv npuas shrinkage thiab tswj cov npuas loj.
High-resilience polyurethane foams muaj viscosity siab thiab qis crosslinking℃vim yog siv cov reactive heev -hydroxy polyols thiab qis curing kub, ua npuas yooj yim stabilized. Yog li ntawd, cov stabilizers uas muaj qhov hnyav dua molecular thiab tsis tshua muaj kev ruaj ntseg yuav tsum tau xaiv, xws li qis-molecular- hnyav polyether- hloov cov roj silicone. Siv dav dav -lub hom phiaj hloov pauv tau ua npuas ncauj polyether- hloov cov roj silicone tuaj yeem ua rau ua npuas ncauj ruaj khov, txo cov npuas sib txuas, thiab thaum kawg, ua npuas ncauj shrinkage.
Polyether- hloov cov roj silicone yog siv los ua kom ruaj khov rau polyurethane ua npuas ncauj. Nws yog ib qho tseem ceeb heev uas nws tsis pub Si-H pab pawg, vim tias muaj cov seem Si-H pawg yuav cuam tshuam rau micropore qhov loj thiab qhov sib xws ntawm cov npuas dej.
Ob. Cosmetic Raw Khoom
Polyether-cov roj silicone hloov tau yooj yim soluble hauv cawv thiab dej, thiab kuj yooj yim sib xws nrog lwm cov khoom xyaw kom zoo nkauj.
Thaum ntxiv ntawm 0.15% mus rau 5%, nws tuaj yeem txo qhov nro ntawm cov tshuaj pleev ib ce, txhawb kev nthuav tawm ntawm cov tshuaj pleev ib ce rau ntawm daim tawv nqaij lossis plaub hau.
Nws yog dav siv hauv tshuaj zawv plaub hau, tshuaj kho mob, mousses, khoom tu tawv nqaij, shaving khoom, tshuaj tua kab mob, tshuaj tsw qab, xab npum, thiab tshuaj pleev ib ce xim. Ntxiv ib qho me me ntawm polyether- hloov cov roj silicone rau cov plaub hau formulations tuaj yeem ua kom ci, tswj tau, smoothness, antistatic zog, thiab zoo siab rau cov plaub hau.
Polyether- hloov ntau yam nrog qis HLB qhov tseem ceeb tuaj yeem siv los ua emulsifiers hauv silicone roj complex systems. Piv txwv li, nyob rau hauv cov tshuaj pleev ib ce formulations, siv polyether - hloov silicone roj raws li ib tug emulsifier muaj peev xwm emulsify qis -viscosity methyl silicone roj nrog dej los tsim ib tug ruaj khov dispersion system. Cov qauv no tsis yog- ua rau tawv nqaij thiab nyab xeeb siv.
Hom polyether no-hloov silicone roj tuaj yeem npaj tau los ntawm hydrosilylation cov tshuaj tiv thaiv ntawm dimethyl silicone roj nrog Si-H pawg davhlau ya nyob twg thiab ib qho allyl-terminated polyether.
Peb. Txheej additives
1. Defoamers
Polyether- hloov cov roj silicone tau yooj yim emulsifies hauv dej thiab yog ib feem tseem ceeb ntawm tus kheej -emulsifying defoamers. Polyether- hloov kho silicone roj poob nws cov dej solubility thiab nthuav tawm cov khoom defoaming saum nws cov huab cua kub.
Defoamers formulated nrog polyether- hloov silicone roj pom zoo thaum tshav kub kub tsis kam thiab mechanical stability, thiab resistant rau acids, alkalis, thiab inorganic ntsev, ua rau lawv haum rau defoaming nyob rau hauv hnyav tej yam kev mob.
Piv txwv ntawm defoaming muaj xws li siab -kub dyeing txheej txheem rau polyester fabrics, defoaming nyob rau hauv diethanolamine aqueous tov desulfurization systems, thiab defoaming nyob rau hauv ntau yam roj, txiav kua, antifreeze, thiab lwm yam systems.
Tshwj xeeb tshaj yog nyob rau hauv kev lag luam luam ntawv, tom qab photosensitive resin phaj ua, ib tug muaj zog aqueous tov uas muaj inorganic alkaline ntsev xws li sodium borate thiab surfactants yog siv los ntxuav tawm cov uncured resin. Cov npuas dej tsim los ntawm cov tshuaj ntxuav hauv qab siab shear quab yuam hnyav heev cuam tshuam rau kev tu kom zoo. Polyether- hloov silicone roj yog ib qho zoo heev defoamer. Yog hais tias ib tug defoamer formulated nrog zoo tib yam dimethyl silicone roj yog siv, nws cov nyhuv defoaming yuav txo nyob rau hauv lub sij hawm ntev shear quab yuam, txhawb foaming thiab tawm dimethyl silicone roj residue ntawm lub phaj, yog li cuam tshuam rau lub phaj zoo.
2. Polyether- hloov pauv cov roj silicone yog tus neeg sawv cev tseem ceeb thiab tus neeg sawv cev hauv dej- raws li txheej txheej.
3. Polyether- hloov cov roj silicone nrog epoxy pawg ntawm qhov kawg ntawm cov saw hlau polyether tuaj yeem txhim kho qhov rov ua kom zoo ntawm tib txheej txheej thiab txhim kho cov txheej txheej tiv thaiv dej kub, chav dej, thiab khawb. Lawv tuaj yeem npaj tau los ntawm hydrosilylation cov tshuaj tiv thaiv ntawm polyethers nrog allyl pawg ntawm ib kawg thiab epoxy pawg ntawm lwm yam nrog Si-H- muaj polyorganosiloxanes.
Plaub. Pesticide Wetting Agents
Tsawg molar mass polyether- hloov silicone roj tuaj yeem txo qhov nro ntawm nws cov tshuaj aqueous. Thaum siv los ua cov tshuaj tua kab wetting, nws tuaj yeem txhim kho qhov adhesion ntawm cov tshuaj tua kab kom cog nplooj hauv cov huab cua los nag thiab txo cov tshuaj tua kab.
Tsib. Resin Modifier
Cov ntu polyether hauv polyether- hloov pauv cov roj silicone molecules tuaj yeem txhim kho nws txoj kev sib raug zoo nrog cov resins, tsim kom muaj kev sib txawv hauv cov resin, txhim kho cov dej ntws ntawm cov resin thaum lub sij hawm melting, txhim kho lubricity ntawm cov hlau thiab yas, thiab txhim kho cov extrudability ntawm plastics.
Nws tseem tuaj yeem txhawb kev tsim cov micro-dispersion ntawm inorganic cov ntaub ntawv nyob rau hauv plastics, tshwj xeeb tshaj yog cov dispersion nyhuv ntawm titanium dioxide, calcium carbonate, thiab lwm yam.
Txawm li cas los xij, cov pa roj carbon monoxide- hloov kho cov roj silicone feem ntau muaj 1% mus rau 20% residual polyether tebchaw los ntawm huab hwm coj, uas tuaj yeem cuam tshuam rau lub zog txhua yam thiab hnyav o ntawm cov khoom hloov kho. Ib qho kev daws teeb meem yog siv ib qho - txiav tawm allyl polyether nrog cov molar me me kom tau txais cov tshuaj tiv thaiv hydrosilylation nrog methyl hydrogen - muaj cov roj silicone, thiab tom qab ntawd evaporate cov polyether tsis muaj kev cuam tshuam los ntawm polyether tshwm sim - hloov silicone roj nyob rau hauv lub tshuab nqus tsev siab.
Rau. Fabric finishing agents
Textiles ua los ntawm hluavtaws fibers los yog paj rwb muaj zog hydrophobicity tom qab ua resin, thaum ua tiav nrog polyether - hloov silicone roj tuaj yeem impart hydrophilicity, hws nqus, thiab antistatic zog.
Thaum yuav tsum tau ua kom ntev, cov ntu hydrophobic ntawm polyether- hloov pauv silicone roj molecule tuaj yeem hloov nrog Si-H pawg lossis pawg alkoxy.
Thaum yuav tsum muaj softness thiab smoothness, ntu hydrophobic tuaj yeem hloov nrog epoxy- hloov kho lossis amino- hloov pauv pawg organosilicon.
Xya. Siv hauv kev tsim cov dej- raws li cov neeg tso tawm
Aqueous dispersions ntawm polyether- hloov silicone roj nrog ib tug huab point ntawm 25℃~ 50℃yuav siv tau raws li tso tawm neeg sawv cev rau polyurethane ua npuas ncauj molding thiab txhaj tshuaj molding.
Aqueous dispersions ntawm polyether- hloov silicone roj thiab perfluoroalkyl phosphoric acid tuaj yeem siv los ua cov neeg tso tawm rau epoxy resin molding.
Aqueous dispersions ntawm polyether- hloov silicone roj thiab dimethyl silicone roj tuaj yeem siv los ua cov neeg ua haujlwm tso tawm rau molding thiab ua cov yas, roj hmab, cov khoom ntawv, thiab cov khoom hlau.
Yim yim. Latex heat sensitizer
Latex heat sensitizers yog gelling agents haum rau siv nrog latex.
Thaum tus neeg sawv cev gelling no ntxiv rau latex, nws yog qhov ruaj khov ntawm chav tsev kub; Txawm li cas los xij, thaum kub nce mus rau ib qho nqi, cov latex sai sai, thiab hom latex no hu ua heat-sensitized latex.
Siv polyether- hloov cov roj silicone ua cov khoom cua sov rau ob qho tib si ntuj thiab hluavtaws roj hmab latex ua rau cov latex ruaj khov hauv qab nws cov huab cua kub, muab lub neej ntev; Thaum rhuab mus rau huab cua kub taw tes, lub latex solidifies sai heev nrog ib tug me me kub ntau yam, thiab cov solidified gel exhibits zoo heev zog.
Thaum tshav kub kub-sensitized latexes formulated nrog polyether- hloov silicone roj yog dav siv los ua cov nplaum rau cov uas tsis yog- woven fabrics thiab cov khoom siv tawv tawv ntaub.
