DiMethylthiotoluenediaMine (DMTDA) cas 106264-79-3
DimethylthioToluene Diamie / DMTDA, lambar CAS. 106264-79-3, maganin diamines ne ga tsarin TDI da MDI. Kasancewar ruwa mai ƙauri a zafin ɗaki yana haifar da fa'idodi masu yawa na sarrafawa, watau sauƙin canja wuri, a shirye don amfani ba tare da narke daskararrun kamar yadda MOCA ke yi ba. DMTDA wani abu ne mai kyau na warkarwa wanda ake amfani da shi don yin elastomers masu ɗorewa da sassauƙa na polyurethane/polyurea.
DMTDA na iya zama wakili mai warkarwa da kuma mai faɗaɗa sarka don diisocyanate pre-polymers, musamman ga tsarin polyurea wanda ke ba da kyawawan halaye na injiniya da na motsi. DMTDA wakili ne na warkarwa na duniya wanda za a haɗa shi da sauran diamines na ruwa, misali DETDA, don bambanta ƙimar warkarwa da halayen injiniya don biyan buƙatu daban-daban. Saboda haka, akwai amfani da DMTDA mai yawa akan ƙafafun polyurethane, tayoyi, masu jefa ƙuri'a, masu rufe elastomeric da sauransu. Kuna iya samun samfuran gama gari na DMTDA a ko'ina, gami da gini, haƙar ma'adinai, motoci, kayan lantarki, yadi da wuraren bugawa.
Ba kamar MOCA ba, 4,4'-Methylenebis(2-chloroaniline), DMTDA ba a zargin tana da cutar kansa ba. Yana da kyau ga muhalli, ba shi da guba kuma yana da aminci ga ma'aikata su iya jurewa yayin sarrafawa. Amfanin kasancewa cikin ruwa, DMTDA ba zai haifar da ƙura mai guba, hayaki ko tururi ba yayin aiki. Saboda haka, ma'aikata ba za su fuskanci haɗarin ba yayin amfani da DMTDA. A farkon zamanin, masu samar da polyurethane na EU suna amfani da MOCA a matsayin babban maganin warkarwa don tsarin polyurethane na TDI saboda ƙarancin farashi, kyakkyawan aiki akan ƙarfin tauri, juriya, juriya da juriyar gogewa. Domin kare ma'aikata da muhalli, ƙasashe da yawa sun haramta amfani da MOCA, don haka, yana tilasta masu samar da polyurethane su nemo madadin MOCA, DMTDA, wanda kuma ake kira ruwa MOCA. DMTDA tana kawar da yawancin haɗarin lafiya da ke da alaƙa da sarrafa MOCA kuma tana samar da kyawawan halaye na zahiri idan aka kwatanta da polyurethanes/polyureas elastomers na MOCA.
Akwai wata muhimmiyar fa'ida ta DMTDA idan aka kwatanta da MOCA. Tunda DMTDA tana cikin ruwa, tana ba da damar aiki a ƙananan zafin jiki fiye da yadda MOCA ke yi. Ba tare da tsarin narkewa ba wanda dole ne a MOCA, za ku iya adana kuɗi mai yawa na makamashi yayin ƙera. Yiwuwar ƙarfafawa ba ya faruwa a cikin kwantena ko injunan haɗawa. Bugu da ƙari, ana iya sarrafa shi a ƙananan zafin jiki fiye da MOCA don yanayin ruwa. Daidai nauyin DMTDA shine 107 idan aka kwatanta da MOCA shine 133.5. Wannan yana nufin raguwar nauyin prepolymer da kashi 20% a cikin stoichiometer iri ɗaya.
Ana amfani da DMTDA a matsayin maganin warkar da PU. Yana iya rage ayyukan rukunin "NH2", don haka, don tsawaita tsawon lokacin tukunya yayin yin jifa.
DMTDA, kasancewar ruwa a zafin ɗaki yana haifar da babban fa'idar sarrafawa idan aka kwatanta da MOCA, narkewar daskararru ba lallai ba ne. Haka kuma, sifar ruwansa tana ba da damar sarrafa prepolymer a ƙananan zafin jiki fiye da na MOCA kuma ba tare da tauri ba yayin haɗuwa. DMTDA tana da nauyin daidai da 107 idan aka kwatanta da 133.5 na MOCA. Wannan yana nufin cewa ana buƙatar kusan kashi 20% ƙasa da nauyi don prepolymer da aka bayar a daidai stoichiometry.
Kwatanta Halayen Jiki na Prepolymer da aka Warke da DMTDA & MOCA
Sifofin jiki na prepolymer, duka nau'ikan ether da ester, idan aka warkar da su da maganin warkarwa na DMTDA, suna kama da waɗanda aka gina da MOCA. Kamar yadda yake a cikin tsarin warkarwa na MOCA, sifofin jiki suna da alaƙa da rabon (stoichiometry) na maganin warkarwa ga prepolymer. Juriyar maganin DMTDA ga bambance-bambancen stoichiomety kamar na MOCA. Ƙananan stoichiomety (80-90%) gabaɗaya yana da ikon haɓaka juriyar saitin matsi, yayin da babban stoichiomety (100-105%) yana da ikon haɓaka ƙarfin tsagewa da tsawon lokacin lanƙwasa. Mafi kyawun sakamako ga yawancin aikace-aikacen ana samun su a kusan kashi 95% na stoichiometry. Duk da yake yanayin warkarwa (zafin jiki da lokutan) sun yi kama da waɗanda aka yi amfani da su tare da MOCA, maganin DMTDA yana buƙatar kulawa sosai ga yanayin warkarwa bayan warkarwa don samun mafi girman halayen jiki, musamman don saitin matsi da sifofin masu motsi.
Ana amfani da DMTDA sosai a tsarin shafa fenti a fannin gine-gine, motoci, ruwa da masana'antu. Rufin polyurethane na DMTDA yana da babban aiki, kamar tauri da laushi, ƙarfi mai yawa, hana ruwa shiga, juriya ga yanayi, juriya ga gogewa, karce da juriya ga tsatsa. Ana iya amfani da polyurethane na DMTDA ta hanyar dabarun shafa fenti daban-daban ga abubuwan da aka yi amfani da su, misali ƙarfe, itace, siminti, gini da saman filastik.
Ana iya amfani da DMTDA a matsayin wakilin maganin resin epoxy/kayan rufi da kuma elastomers na PU, kamar polyurethane da polyurea da ake amfani da su don komai daga rufin da ke da ƙarfi zuwa hatimin kumfa mai sassauƙa, har ma da ƙafafun da tayoyi. Bugu da ƙari, ana iya amfani da DMTDA a kan motoci, gini, haƙa ma'adinai, yadi, na'urorin bugawa, ƙafafun trolley, manne da masana'antar lantarki.
Marufi: 25kg, 200kg/ganga na ƙarfe. ko kuma TANK na IBC.
Ajiya da jigilar kaya: A guji taɓa ruwa. A kiyaye daga hasken rana.
Tsawon lokacin shiryawa: watanni 12
| Abu | Fihirisa |
| Bayyanar | Ruwa mai haske mai haske daga rawaya zuwa rawaya |
| ƙamshi | Kamar Amine |
| Jimlar Diamine | minti 99% |
| Dimethylthiotoluenediamine | minti 95% |
| Monomethylthiotoluenediamine | 4% mafi girma |
| Trimethylthiotoluenediamine | 1%mafi girma |
| Abubuwan TDA | 0.1%mafi girma |
| Launi, Girman launi na Gardner | 2-8 |
| Ƙimar amine (mgKOH / g) | 520-540 |
| Danshi (%) | 0.1%mafi girma |
| 1. | |
| 2. | |
| 3. | |
| 4. | |
| 5. | |
| 6. | TDI 80/20 |
| 7. | 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. | da sauransu... |
