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Ndi kuwonjezeka kosalekeza kwa kufunikira kwa zowonjezera zogwira ntchito bwino, zosawononga chilengedwe komanso zogwira ntchito bwino m'mafakitale atsopano monga polyurethane ndi epoxy resin,dimethyl thio-toluene diamine(DMTDA, nambala ya CAS: 106264-79-3) pang'onopang'ono yakhala mphamvu yaikulu yoyendetsera makampani chifukwa cha mawonekedwe ake apadera azinthu komanso momwe amagwiritsidwira ntchito kwambiri. Monga mtundu watsopano wa aromatic diamine curatory agent komanso chain extender, DMTDA pang'onopang'ono ikulowa m'malo mwa mankhwala ochiritsira olimba achikhalidwe. Dimethyl thio-toluene diamine yagwiritsidwa ntchito kwambiri m'magawo osiyanasiyana monga magalimoto, zomangamanga, unyolo wozizira, ndi anti-corrosion, zomwe zikulimbikitsa makampani kusintha kukhala otsika mpweya, ogwira ntchito bwino komanso otukuka kwambiri.

Makhalidwe a dimethyl thio-toluene diamine (DMTDA)

Ubwino waukulu waDimethyl thio-toluene diamine (DMTDA)Zimachokera ku mphamvu yake yeniyeni yokhala mu mkhalidwe wamadzimadzi kutentha kwa chipinda komanso magwiridwe ake abwino kwambiri a mankhwala. Poyerekeza ndi mankhwala ochiritsira olimba achikhalidwe a MOCA, mankhwalawa amatha kupopedwa mwachindunji ndikugwiritsidwa ntchito popanda kutentha. Izi sizimangochepetsa kwambiri kugwiritsa ntchito mphamvu ndi zovuta pakupanga, komanso zitha kusinthidwa kuti zigwirizane ndi zochitika zomangira zotsika kutentha, zomwe zimathandiza kuthana ndi mavuto amakampani monga kupangika kwa mankhwala ochiritsira panthawi yopanga yozizira komanso kumanga kosasangalatsa.

Deta ikuwonetsa kuti reactivity ya DMTDA ndi nthawi 3.7 kuposa ya MOCA. Imatha kupanga kapangidwe kolimba ka urea ndi isocyanates mwachangu, zomwe zimapangitsa kuti mphamvu yokoka komanso kung'ambika kwa zinthu za elastomer zikhale ndi 20%-30%. Pa madigiri Celsius 40, imakhalabe ndi kusinthasintha kwabwino ndipo magwiridwe ake a hydrolysis amawonjezeka ndi 30% poyerekeza ndi MOCA, zomwe zimapangitsa kuti ikhale yoyenera nyengo zovuta monga chinyezi ndi kutentha kochepa.

Kugwiritsa ntchito dimethyl thio-toluene diamine (DMTDA)

Mu gawo la ma elastomer a polyurethane, DMTDA yakhala chinthu chofunikira kwambiri popanga zinthu zapamwamba. Imagwiritsidwa ntchito kwambiri m'njira monga kuponya ma elastomer a polyurethane, reaction injection molding (RIM), ndi kupopera polyurea (SPUA), ndipo ingagwiritsidwe ntchito popanga zinthu monga ma roller a rabara oyenda kwambiri, ma casters a mafakitale, ma scrapers amafuta, ndi zida zoyamwa ma shock. Chifukwa cha mphamvu yake yabwino kwambiri yamakina komanso kukana mafuta, kukana kukalamba, dimethyl thio-toluene diamine (DMTDA) imakwaniritsa zofunikira kwambiri pakupanga makina ndi makampani opanga magalimoto kuti zinthu zikhale zolimba. Makamaka pankhani yonyamula ma cold chain, ma seal ndi ma shock absorption pads okonzedwa ndi DMTDA amatha kusintha kuti zinthu zizikhala zotentha kwambiri, kupereka chitsimikizo cha magwiridwe antchito okhazikika a magalimoto a cold chain ndi zida zoziziritsira, komanso kukhala chithandizo chofunikira pakukweza zinthu za cold chain.

Kapangidwe ka zomangamanga ndi uinjiniya wotsutsana ndi dzimbiri ndi njira ina yofunika kwambiri yogwiritsira ntchitoDMTDAMonga epoxy resin yochiritsira, dimethyl thio-toluene diamine ingagwiritsidwe ntchito kukonzekera zokutira zoteteza dzimbiri komanso zokutira zoteteza moto, zomwe zimagwiritsidwa ntchito kwambiri polimbana ndi dzimbiri m'makoma amkati mwa mapaipi achitsulo, kukonza madenga a nyumba ndi makoma am'mbali, ndi zina zotero. Chophimba chotsitsimutsidwacho chili ndi kulimba kwabwino, kukana dzimbiri ndi mankhwala komanso kukhazikika kwa kapangidwe kake, zomwe zitha kukulitsa moyo wa zomangamanga. Muzochitika zomwe zili ndi dzimbiri lalikulu monga zida zaukadaulo wapamadzi ndi migodi, zokutira zochokera ku DMTDA zimatha kukana kukokoloka kwa nthaka kuchokera m'madzi a m'nyanja, acidic ndi alkaline, kuchepetsa kwambiri ndalama zosamalira zida, komanso kuthandiza kukweza ukadaulo pantchito yapamwamba yolimbana ndi dzimbiri.

Kuthekera kwa chitukuko cha dimethyl thio-toluene diamine (CAS 106264 793)

Kutsatira malamulo okhudza chilengedwe ndi kuthekera kwa msika kwathandizira kwambiri njira yosinthira dimethyl thio-toluene diamine. Popeza madera monga EU akukhazikitsa malamulo oletsa kugwiritsa ntchito mankhwala ophera poizoni monga MOCA, DMTDA amine yomwe siiwononga chilengedwe yakhala njira yabwino kwambiri m'makampani. Sikuti imangotsatira malamulo apadziko lonse lapansi oteteza chilengedwe komanso imachepetsa kuipitsa fumbi panthawi yopanga ndikuwonjezera chitetezo cha ntchito za workshop. Kuchokera pamalingaliro amsika, kukula kwa msika wapadziko lonse wa DMTDA ndi zinthu zina zofanana kudafika pa 2.873 biliyoni yuan mu 2024. Ikuyembekezeka kukula pamlingo wapachaka wa 17.06% kuyambira 2025 mpaka 2030. Pakati pawo, munda wa polyurethane elastomer ndiye malo ofunikira kwambiri, ndipo kukula kwa kufunikira kuchokera kuzinthu zopangira zapamwamba kwakhala mphamvu yayikulu yoyendetsera msika.

Akatswiri amakampani anena kuti kugwiritsa ntchito kwakukulu kwaDMTDA ethacure 300Sikuti imangolimbikitsa kusinthasintha kwa zinthu m'makampani opanga zinthu zoyeretsera, komanso imathandiza mafakitale omwe ali pansi pa nthaka kuchepetsa ndalama, kukonza magwiridwe antchito, komanso kukweza zinthu zapamwamba. M'tsogolomu, ndi kupita patsogolo kosalekeza muukadaulo watsopano, kugwiritsa ntchito DMTDA amine mumlengalenga, zida zamankhwala, ndi zomatira zapamwamba ndi madera ena kudzakula kwambiri. Nthawi yomweyo, kuyera kwambiri (≥99%) ndi chiŵerengero chosinthidwa cha zinthu za DMTDA zidzakhala malo opikisana pamsika ndikutsogolera makampaniwo ku njira yabwino komanso yogwira ntchito bwino. Makampani a Unilong, kudzera muukadaulo wamakono komanso kukulitsa mphamvu, akukulitsa pang'onopang'ono mawu ake pamsika wapadziko lonse wa DMTDA ndikupereka chithandizo chofunikira pakudziyimira pawokha komanso kulamulira kwa unyolo wamafakitale.