Polyurethane yog ib qho polymer uas siv tau ntau yam hauv ntau yam kev siv, los ntawm cov ua npuas dej thiab cov txheej txheej mus rau elastomers thiab cov nplaum. Kev tsim cov polyurethane cuam tshuam nrog kev sib xyaw ua ke ntawm cov tshuaj polyols thiab isocyanates, thiab cov catalysts ua lub luag haujlwm tseem ceeb hauv kev tsav tsheb qhov kev sib xyaw ua ke no kom zoo. Ntawm ntau hom catalysts siv, cov catalysts raws li amine yog qhov tseem ceeb tshwj xeeb vim lawv muaj peev xwm ua kom cov kev sib xyaw ua ke sai dua thiab tswj cov khoom ntawm cov khoom kawg.
Amines hauv Polyurethane Production
Amines yog cov organic compounds uas tau los ntawm ammonia thiab yog tus cwj pwm los ntawm qhov muaj ib lossis ntau pawg alkyl lossis aryl txuas rau ib qho nitrogen atom. Hauv cov ntsiab lus ntawm polyurethane ntau lawm, amine catalysts yog siv los pab txhawb ob qho tib si urethane (polyol thiab isocyanate) thiab urea (dej thiab isocyanate) cov tshuaj tiv thaiv. Cov catalysts no tuaj yeem faib ua tertiary amines thiab amine-based polyols.
1. Tertiary Amines: Cov no yog cov amine catalysts uas siv ntau tshaj plaws hauv cov polyurethane formulations. Piv txwv li suav nrog triethylenediamine (TEDA), dimethylcyclohexylamine (DMCHA), thiab bis(dimethylaminoethyl) ether (BDMAEE). Cov tshuaj no ua rau cov tshuaj tiv thaiv qeeb dua, txhim kho kev tsim ua npuas ncauj, thiab cuam tshuam rau cov qauv ntawm cov polyurethane ua npuas ncauj.
2. Cov Polyols Uas Muaj Amine: Cov no yog cov polyols uas muaj amine ua haujlwm uas ua ob qho tib si ua polyol thiab ua catalyst. Lawv muaj txiaj ntsig zoo hauv kev tsim cov tshuab ua npuas ncauj uas yooj ywm uas xav tau kev ua haujlwm ntau ntxiv.
DABCO Catalyst
DABCO, los yog 1,4-diazabicyclo[2.2.2]octane, yog ib qho tshuaj catalyst tertiary amine uas paub zoo hauv kev lag luam polyurethane. Nws muaj txiaj ntsig zoo heev hauv kev ua kom ob qho tib si gelling (urethane tsim) thiab blowing (carbon dioxide tsim) cov tshuaj tiv thaiv. Lub qauv tshwj xeeb ntawm DABCO tso cai rau nws txhawb nqa kev sib npaug ntawm cov tshuaj tiv thaiv, kom ntseeg tau tias muaj cov khoom ua npuas zoo tshaj plaws xws li qhov ceev, qhov loj ntawm lub cell, thiab lub zog kho tshuab.
POLYCAT 15thiabDABCO T
1. POLYCAT 15: Qhov no yog ib qho tshuaj catalyst uas muaj amine ua haujlwm tau zoo heev uas tsim los siv rau hauv cov ntawv thov polyurethane ua npuas ncauj. Nws muaj cov haujlwm catalytic zoo heev, ua rau cov tshuaj tiv thaiv sai dua thiab txhim kho cov yam ntxwv ua npuas ncauj. POLYCAT 15 muaj txiaj ntsig zoo tshwj xeeb hauv cov txheej txheem ua npuas ncauj uas yoog tau thiab tawv, muab cov yam ntxwv ua tiav zoo dua thiab kev ua haujlwm zoo dua ntawm cov khoom kawg.
2. DABCO T: Cov tshuaj catalyst no yog lwm hom ntawm tsev neeg DABCO, tsim tshwj xeeb rau cov ntawv thov polyurethane tshwj xeeb. DABCO T paub txog nws cov haujlwm catalytic muaj zog thiab nws lub peev xwm los muab kev ua tau zoo thiab txhim khu kev qha hauv ntau hom ua npuas ncauj. Nws yog siv dav hauv ob qho tib si yooj ywm thiab tawv ua npuas ncauj, muab kev tswj hwm zoo dua ntawm cov khoom siv lub cev ntawm npuas ncauj.
Xaus lus
Cov amines, tshwj xeeb tshaj yog cov tertiary amines xws li DABCO, ua lub luag haujlwm tseem ceeb hauv cov txheej txheem tsim polyurethane. Cov catalysts xws li POLYCAT 15 thiab DABCO T yog qhov tseem ceeb rau kev ua tiav cov kev xav tau ntawm cov tshuaj tiv thaiv thiab cov khoom ua npuas ncauj, kom ntseeg tau tias cov khoom polyurethane zoo. Los ntawm kev nkag siab thiab siv cov catalysts no kom zoo, cov chaw tsim khoom tuaj yeem ua kom zoo dua lawv cov txheej txheem tsim khoom thiab txhim kho kev ua tau zoo ntawm lawv cov ntawv thov polyurethane.
Lub sijhawm tshaj tawm: Lub Rau Hli-24-2024