DiMethylthiotoluenediaMine (DMTDA) cas 106264-79-3
DimethylthioToluene Diamie / DMTDA, nambala ya CAS. 106264-79-3, ndi mankhwala a diamines a machitidwe onse a TDI ndi MDI. Kukhala madzi okhuthala kutentha kwa chipinda kumabweretsa ubwino waukulu wokonza, mwachitsanzo kusamutsa kosavuta, wokonzeka kugwiritsidwa ntchito popanda kusungunula zinthu zolimba monga momwe MOCA imachitira. DMTDA ndi mankhwala abwino kwambiri ochiritsira omwe amagwiritsidwa ntchito popanga polyurethane/polyurea elastomers olimba komanso osinthasintha.
DMTDA ikhoza kukhala chothandizira kuchiritsa komanso chowonjezera unyolo wa ma polima a diisocyanate pre-polymers, makamaka pa polyurea system yomwe imapereka mphamvu zabwino zamakaniko ndi mphamvu. DMTDA ndi chothandizira kuchiritsa chomwe chimagwiritsidwa ntchito ndi ma diamine ena amadzimadzi, mwachitsanzo DETDA, kuti chisinthe kuchuluka kwa kuchiritsa ndi mphamvu zamakaniko kuti chikwaniritse zofunikira zosiyanasiyana. Chifukwa chake, pali kugwiritsa ntchito kwakukulu kwa DMTDA pamawilo a polyurethane, matayala, ma casters, ma rollers, zokutira za elastomeric ndi zina zotero. Mutha kupeza zinthu zomalizidwa za DMTDA kulikonse, kuphatikiza zomangamanga, migodi, magalimoto, zamagetsi, nsalu ndi malo osindikizira.
Mosiyana ndi MOCA, 4,4'-Methylenebis (2-chloroaniline), DMTDA siikuganiziridwa kuti imayambitsa khansa. Ndi yotetezeka ku chilengedwe, si poizoni komanso yotetezeka kwa ogwira ntchito pokonza. Ubwino wokhala mumadzimadzi, DMTDA sidzayambitsa fumbi, utsi kapena nthunzi zapoizoni panthawi yogwira ntchito. Chifukwa chake, ogwira ntchito sadzakumana ndi zoopsa akamagwiritsa ntchito DMTDA. Kale, opanga polyurethane a EU amagwiritsa ntchito MOCA ngati chothandizira chachikulu chochiritsira makina a polyurethane okhala ndi TDI chifukwa cha mtengo wake wotsika, magwiridwe antchito abwino kwambiri pakulimba, kulimba, kulimba komanso kukana kukwawa. Pofuna kuteteza ogwira ntchito ndi chilengedwe, mayiko ambiri adaletsa kugwiritsa ntchito MOCA, motero, imakakamiza opanga polyurethane kupeza cholowa m'malo mwa MOCA, DMTDA, chomwe chimatchedwanso liquid MOCA. DMTDA imachotsa zoopsa zambiri paumoyo zokhudzana ndi kugwira ntchito ndi MOCA ndipo imapereka mawonekedwe abwino kwambiri poyerekeza ndi ma polyurethane/polyureas elastomers okhala ndi MOCA.
Pali ubwino wina wofunikira wa DMTDA poyerekeza ndi MOCA. Popeza DMTDA ili mu mawonekedwe amadzimadzi, imalola kugwira ntchito pa kutentha kotsika kuposa MOCA. Popanda njira yosungunula yomwe ndi yofunika kwambiri pa MOCA, mutha kusunga ndalama zambiri zamagetsi popanga. Kuthekera kwa kulimba sikumachitika m'mabotolo osakaniza kapena makina osakaniza. Kuphatikiza apo, imatha kusamalidwa pa kutentha kotsika kuposa MOCA chifukwa cha momwe ilili madzimadzi. Kulemera kofanana kwa DMTDA ndi 107 poyerekeza ndi MOCA ndi 133.5. Izi zikutanthauza kuti kulemera kwa prepolymer pa stoichiometr yomweyo kuchepetsedwa ndi 20%.
DMTDA imagwiritsidwa ntchito ngati chothandizira kuchiritsa cha PU. Imatha kuchepetsa ntchito ya gulu la "NH2", motero, kukulitsa moyo wa mphika pochita kuponya.
DMTDA, popeza ndi madzi pa kutentha kwa chipinda, imabweretsa ubwino waukulu poyerekeza ndi MOCA, kusungunuka kwa zinthu zolimba sikofunikira. Komanso, mawonekedwe ake amadzimadzi amalola kukonza prepolymer pa kutentha kotsika kuposa kwa MOCA komanso popanda kuuma panthawi yosakaniza. DMTDA ili ndi kulemera kofanana kwa 107 poyerekeza ndi 133.5 ya MOCA. Izi zikutanthauza kuti pafupifupi 20% yocheperako ndi kulemera kumafunikira pa prepolymer yoperekedwa pa stoichiometry yomweyo.
Kuyerekeza kwa Katundu Wathupi wa Prepolymer Wochiritsidwa ndi DMTDA ndi MOCA
Makhalidwe enieni a prepolymer, mitundu yonse ya ether ndi ester, akachiritsidwa ndi DMTDA curing agent, amafanana ndi omwe amagwiritsidwa ntchito ndi MOCA. Monga momwe zilili mu MOCA curing system, makhalidwe enieni amakhudzidwa ndi ration (stoichiometry) ya curative ku prepolymer. Kulekerera kwa DMTDA curative ku mitundu yosiyanasiyana ya stoichiomety yofanana ndi ya MOCA. Stoichiomety yotsika (80~90%) nthawi zambiri imapangitsa kuti pakhale kukana kwakukulu kwa compression set, pomwe stoichiomety yapamwamba (100-105%) imapangitsa kuti pakhale kulimba kwa misozi ndi moyo wosinthasintha. Zotsatira zabwino kwambiri zogwiritsidwa ntchito kwambiri zimapezeka pa 95% stoichiometry. Ngakhale kuti machiritso (kutentha ndi nthawi) amafanana ndi omwe amagwiritsidwa ntchito ndi MOCA, DMTDA curative imafuna chisamaliro chapadera ku machiritso pambuyo pa kuchira kuti ipeze machiritso apamwamba kwambiri, makamaka pa machiritso ndi machiritso amphamvu.
DMTDA imagwiritsidwa ntchito kwambiri mu makina opaka utoto m'magawo okonza zomangamanga, magalimoto, za m'madzi ndi mafakitale. Chopaka utoto cha polyurethane chochokera ku DMTDA chimagwira ntchito bwino kwambiri, monga kulimba ndi kusinthasintha, mphamvu zambiri, kusalowa madzi, kukana nyengo, kukana kukwawa, kukanda ndi dzimbiri. Ma polyurethane ochokera ku DMTDA angagwiritsidwe ntchito pogwiritsa ntchito njira zosiyanasiyana zopaka utoto pa zinthu monga zitsulo, matabwa, konkire, miyala yamwala ndi pulasitiki.
DMTDA ingagwiritsidwenso ntchito ngati epoxy resin curing agent/insulation material ndi PU elastomers, monga polyurethane ndi polyurea zomwe zimagwiritsidwa ntchito pazinthu zonse kuyambira zokutira zolimba mpaka zotsekera za thovu zosinthasintha, ngakhale mawilo ndi matayala. Kuphatikiza apo, DMTDA ingagwiritsidwe ntchito pamagalimoto, nyumba, migodi, nsalu, ma printing rollers, mawilo a trolley, zomatira ndi mafakitale amagetsi.
Kulongedza: 25kg, 200kg/ng'oma yachitsulo kapena thanki ya IBC.
Kusunga ndi mayendedwe: Pewani kukhudzana ndi madzi. Sungani kutali ndi dzuwa.
Nthawi yogwiritsira ntchito: maola 12
| Chinthu | Mndandanda |
| Maonekedwe | Madzi owonekera bwino achikasu mpaka achikasu |
| fungo | Zofanana ndi za Amine |
| Zomwe zili mu Diamine yonse | 99% mphindi |
| Dimethylthiotoluenediamine | 95% mphindi |
| Monomethylthiotoluenediamine | 4% pamlingo wapamwamba |
| Trimethylthiotoluenediamine | 1% pamlingo |
| Zomwe zili mu TDA | 0.1%pamwamba |
| Mtundu, sikelo ya mtundu wa Gardner | 2-8 |
| Mtengo wa Amine (mgKOH / g) | 520-540 |
| Chinyezi (%) | 0.1%pamwamba |
| 1. | |
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| 3. | |
| 4. | |
| 5. | |
| 6. | TDI 80/20 |
| 7. | Ma TDI-Bases Polyisoyanurate (RC) |
| 8. | NDI(1,5-Naphthalene Diisocyanate) CAS 3173-72-6 |
| 9. | RF(JQ-4) |
| 10. | RN |
| 11. | DETDA CAS 68479-98-1 |
| 12. | DMTDA CAS 106264-79-3 |
| 13. | MMEA CAS 19900-72-2 |
| 14. | TODI CAS 91-97-4 |
| 15. | TEOF CAS 122-51-0 |
| 16. | MOCA CAS 101-14-4 |
| 17. | PTSI CAS 4083-64-1 |
| 18. | ndi zina zotero... |
