4,4 Methylenebis 2 chloroaniline, feem ntau hu uaMOCA, yog ib qho tshuaj tsw qab diamine dav siv los ua tus neeg sawv cev kho thiab cov saw txuas ntxiv hauv kev lag luam polyurethane. Nws yog ib qho kev nyiam tshaj plaws rau TDI raws li polyurethane elastomers thiab qee yam epoxy resins vim nws muaj peev xwm tsim cov khoom siv nrog kev ua haujlwm siab, kev ua haujlwm ntev, thiab lub neej ua haujlwm ntev. MOCA plays lub luag haujlwm tseem ceeb hauv kev tswj cov khoom kawg ntawm cov khoom siv polyurethane, suav nrog lub zog tensile, elasticity, abrasion resistance, thiab hardness.
Hauv polyurethane chemistry, MOCA reacts nrog isocyanate terminated prepolymers los tsim cov kab txuas txuas txuas ntev ntev. Nws cov qauv tshuaj tshwj xeeb, suav nrog ob pawg chlorinated amino txuas nrog tus choj methylene, tso cai rau kev sib koom ua ke muaj zog, uas ua rau muaj txiaj ntsig zoo tshaj plaws ntawm cov khoom siv kho mob elastomer. Piv nrog rau lwm cov tshuaj tua kab mob, MOCA muab kev ruaj ntseg zoo heev, tiv thaiv kev hnav, thiab txhim kho kev ua haujlwm zoo, ua rau nws zoo tagnrho rau cov ntawv thov kev lag luam uas yuav tsum muaj kev ua haujlwm siab.
MOCA feem ntau yog muab los ua yellowish granular lossis flake solids. Ua ntej siv, nws yuav tsum tau yaj los yog sib npaug sib npaug rau hauv qhov sib xyaw ua ke ntawm prepolymer ntawm qhov kub thiab txias kom ntseeg tau tias kev kho zoo ib yam. Nws lub lauj kaub lub neej ntev thiab cov khoom siv thermal ruaj khov tso cai rau cov tuam txhab tsim cov khoom loj lossis cov duab cam xws li lub log, cov menyuam, cov ntsaws ruaj ruaj, thiab cov khoom lag luam yam tsis muaj kev cuam tshuam cov khoom sib xws. MOCA kho cov khoom siv feem ntau siv hauv kev lag luam xws li tsheb, aerospace, machinery, mining, thiab cov khoom siv ua kis las.
MOCA yog siv nyob rau hauv epoxy systems uas nws txhim kho toughness, kub kuj, thiab tshuaj stability. Txawm li cas los xij, tuav MOCA yuav tsum ua tib zoo ua raws li cov txheej txheem kev nyab xeeb. Txawm hais tias nws tsis tshua muaj vapor siab, nws daim ntawv tuaj yeem ua rau muaj kev ua haujlwm los ntawm kev nqus pa lossis kev sib cuag ntawm daim tawv nqaij yog tias tsis ua raws li kev tswj xyuas engineering. Kev ua haujlwm raug cai, tswj qhov kub thiab txias, thiab cov cuab yeej tiv thaiv yog qhov tseem ceeb rau ob qho tib si khoom zoo thiab kev nyab xeeb ntawm cov neeg ua haujlwm. Zuag qhia tag nrho, MOCA tseem yog tus neeg sawv cev kho tau zoo rau cov ntawv thov tshwj xeeb polyurethane thiab epoxy qhov kev ua haujlwm tsis tuaj yeem cuam tshuam.