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I te piki haere tonu o te hiahia mō ngā tāpiringa whai hua, pai mō te taiao, me te mahi teitei i roto i ngā ahumahi rauemi hou pēnei i te polyurethane me te epoxy resin,dimethyl thio-toluene diamine(DMTDA, nama CAS: 106264-79-3) kua noho hei tino kaha mō te whakapai ake i te umanga nā ōna āhuatanga hua ahurei me ngā whakamahinga whānui. Hei momo hou o te kaihoko whakamaroke diamine kakara me te whakaroa mekameka, kei te whakakapi haere te DMTDA i ngā kaihoko whakamaroke totoka tuku iho. Kua whakamahia whānuitia te dimethyl thio-toluene diamine i roto i ngā mara maha pēnei i ngā motuka, te hanga, te mekameka makariri, me te ārai-waikura, e whakatairanga ana i te umanga kia huri ki te whanaketanga iti-waro, teitei-whai hua me te mutunga teitei.

Ngā āhuatanga o te dimethyl thio-toluene diamine (DMTDA)

Ngā painga matua oDimethyl thio-toluene diamine (DMTDA)i ahu mai i tōna āhuatanga ā-tinana o te noho hei wai i te pāmahana rūma me tōna mahi matū tino pai. Ki te whakatauritea ki te matū whakaora totoka tuku iho MOCA, ka taea te papu tika me te whakamahi me te kore whakamahana. Ehara i te mea ka whakaitihia te whakapaunga pūngao me te uaua o te mahi i roto i te tukanga whakaputa anake, engari ka taea hoki te whakarerekē mō ngā āhuatanga hanga pāmahana iti, ka whai hua ki te whakatika i ngā uauatanga o te ahumahi pēnei i te whakatiotanga o te matū whakaora i te wā hanga hotoke me te hanganga uaua.

E whakaatu ana ngā raraunga ko te kaha o te DMTDA he 3.7 ngā wā i te kaha o te MOCA. Ka taea e ia te hanga tere i tētahi hanganga urea pakari me ngā isocyanates, ka whakarei ake i te kaha kume me te kaha haehae o ngā hua elastomer mā te 20%-30%. I te pāmahana -40 nekehanga Celsius, ka mau tonu tōna ngāwari pai, ā, ka pai ake tana mahi hydrolysis mā te 30% ki te whakataurite ki te MOCA, ka pai mō ngā āhuatanga tino kino pēnei i te haumākū me te pāmahana iti.

Te whakamahinga o te dimethyl thio-toluene diamine (DMTDA)

I roto i te mara o ngā elastomers polyurethane, kua noho te DMTDA hei rauemi mata matua mō te hanga hua kounga teitei. He whānuitia te whakamahinga i roto i ngā tukanga pēnei i te whakarewanga o ngā elastomers polyurethane, te whakakoi werohanga tauhohenga (RIM), me te rehu polyurea (SPUA), ā, ka taea te whakamahi hei hanga hua pēnei i ngā roera rapa nekeneke-teitei, ngā wira ahumahi, ngā waru paipa hinu, me ngā wāhanga mimiti ru motuka. Nā tōna kaha miihini me te ātete hinu, te ātete koroheketanga, ka tutuki i te dimethyl thio-toluene diamine (DMTDA) ngā whakaritenga tino pakari o te hanga miihini me te umanga motuka mō te roa o ngā wāhanga. Ina koa i roto i te mara o te kawe mekameka makariri, ka taea e ngā hiri me ngā papa mimiti ru i whakaritea ki te DMTDA te urutau ki ngā taiao pāmahana tino iti, e whakarato ana i te taurangi mō te mahi pumau o ngā waka mekameka makariri me ngā taputapu pouaka whakamātao, ā, ka noho hei tautoko nui mō te whakapai ake i ngā mahi kawe mekameka makariri.

Ko te hoahoanga me te hangarau ārai-waikura tētahi atu horopaki tono matua oDMTDAHei rongoā whakamaroke i te kapia epoxy, ka taea te whakamahi i te dimethyl thio-toluene diamine ki te whakarite i ngā paninga ārai-waikura mahi-teitei me ngā paninga ātete ahi, e whakamahia whānuitia ana i roto i te ārai-waikura o ngā pakitara o roto o ngā paipa whakarewa, te maimoatanga ātete ahi o ngā tuanui whare me ngā pakitara taha, me ētahi atu. He pai te piri o te paninga kua whakamarokehia, he ātete ki te waikura matū me te pumau hanganga, ka taea te whakaroa i te roa o te ratonga o ngā hanganga. I roto i ngā āhuatanga he nui te waikura pērā i te miihini moana me ngā taputapu keri, ka taea e ngā paninga e hangai ana ki te DMTDA te ātete ki te waikura mai i te wai moana, te waikawa me te kawakore, te whakaiti nui i ngā utu tiaki taputapu, me te āwhina i te whakapai ake i ngā hangarau i roto i te mara o te ārai-waikura teitei.

Ngā tūmanakohanga whanaketanga o te dimethyl thio-toluene diamine (CAS 106264 79 3)

Nā te tutuki i ngā whakaritenga taiao me te kaha o te mākete kua tere ake te tukanga whakakapinga o te dimethyl thio-toluene diamine. Nā ngā rohe pēnei i te EU e whakatinana ana i ngā here mō te whakamahinga o ngā matū whakaora totoka paitini pēnei i te MOCA, kua noho te amine DMTDA iti-paitini me te hoa-taiao hei huarahi pai ake i roto i te umanga. Ehara i te mea ka tutuki noa i ngā ture tiaki taiao o te ao engari ka whakaitihia hoki te parahanga puehu i te wā o te tukanga whakaputa me te whakarei ake i te haumaru o ngā mahi awheawhe. Mai i te tirohanga a te mākete, ko te rahi o te mākete o te ao o te DMTDA me ngā hua rite i eke ki te 2.873 piriona yuan i te tau 2024. E matapaetia ana ka tipu i te tere tipu ā-tau o te 17.06% mai i te tau 2025 ki te 2030. I roto i ēnei, ko te mara elastomer polyurethane whakarewa te horopaki tono nui rawa atu, ā, ko te tipu o te tono mai i te hangahanga teitei kua noho hei kaha matua mō te whakawhānui ake i te mākete.

Kua kī ngā tohunga ahumahi ko te tono nui oTikanga Tikanga DMTDA 300Ehara i te mea ko te whakatairanga anake i te whakahoutanga o te hua i roto i te umanga rongoā anake, engari ka āwhina hoki i ngā umanga o raro ki te whakaiti i te utu, te whakapai ake i te whai huatanga, me te whakapai ake i te taumata teitei. I te heke mai, me ngā whanaketanga tonu o ngā hangarau rauemi hou, ka whānui ake te whakamahinga o te amine DMTDA i roto i te rererangi, ngā taputapu hauora, me ngā piripiri taumata teitei me ētahi atu mara. I taua wā anō, ka noho ngā hua DMTDA teitei-parakore (≥99%) me te ōwehenga ritenga hei arotahi o te whakataetae mākete, ā, ka ārahi i te umanga ki tētahi huarahi pai ake me te mahi teitei. Mā te auahatanga hangarau me te whakawhānui i te kaha, kei te whakanui haere a Unilong Industry i tōna reo i roto i te mākete DMTDA o te ao, me te whakarato tautoko nui mō te mana motuhake me te whakahaere o te mekameka ahumahi.