01 General xwm txheej

MDI (diphenylmethane diisocyanic acid) yog cov khoom siv polyurethane uas ua los ntawm isocyanate, polyol thiab nws cov neeg sawv cev pabcuam, uas yog siv rau hauv cov khoom siv hauv tsev, tsev, tsheb thauj mus los thiab lwm yam scenes.

MDI raug suav hais tias yog ib qho ntawm cov khoom lag luam loj uas muaj kev cuam tshuam ntau tshaj plaws hauv kev lag luam tshuaj. Cov txheej txheem synthesis ntawm isocyanate yog ntev, nrog rau cov tshuaj tiv thaiv nitration, txo cov tshuaj tiv thaiv thiab acidification cov tshuaj tiv thaiv.

Muaj ob txoj haujlwm tseem ceeb ntawm MDI: phosgenation thiab non-phosgenation. Cov txheej txheem Phosgene yog cov thev naus laus zis tseem ceeb rau kev tsim khoom ntawm isocyanates tam sim no, thiab nws tseem yog tib txoj kev uas tuaj yeem ua tiav cov khoom loj ntawm isocyanates. Txawm li cas los xij, phosgene yog cov tshuaj lom heev, thiab cov tshuaj tiv thaiv yuav tsum tau ua raws li cov kua qaub muaj zog, uas yuav tsum muaj cov cuab yeej siv siab thiab thev naus laus zis.

02 laj

MDI feem ntau muab faib ua peb pawg: polymer MDI, ntshiab MDI thiab hloov kho MDI:

Polymerized MDI yog cov khoom siv raw rau kev tsim cov polyurethane nyuaj ua npuas ncauj thiab ib nrab tawv ua npuas ncauj, thiab nws cov khoom tiav yog dav siv hauv tub yees, thermal rwb thaiv tsev cov ntaub ntawv, automotive trim qhov chaw thiab lwm yam lag luam.

Ntshiab MDI feem ntau yog siv los tsim ntau hom polyurethane elastomers, feem ntau yog siv los tsim cov thermoplastic polyurethane elastomers, spandex, PU tawv slurry, khau adhesives, thiab kuj siv rau hauv microporous elastomer cov ntaub ntawv, xws li ib leeg, cov log tsheb, tus kheej. -crusting ua npuas ncauj, tsheb bumpers, sab hauv trim qhov chaw, thiab tsim cov cam khwb cia polyurethane elastomers.

Raws li ib tug derivative ntawm MDI series cov khoom, hloov MDI yog ib tug technical extension ntawm ntshiab MDI thiab polymerized MDI cov khoom uas nquag siv nyob rau hauv kev ua lag luam tam sim no, thiab muaj peev xwm muab tshwj xeeb siv thiab ua khoom raws li qhov sib txawv ntawm cov khoom qauv tsim thiab synthesis txheej txheem, yog li ntawd. Raws li tau siv dav hauv cov npuas mos, elastomers, coatings, adhesives thiab lwm yam.

03 Upstream thiab downstream ntawm kev lag luam saw

Upstream rau roj, nkev roj, hlau ore thiab lwm yam kev pab;

Qhov nruab nrab ncav cuag yog cov tshuaj nruab nrab ntawm cov khoom siv raw thiab cov khoom kawg hauv qab, sawv cev rau WH Chemical, WX petrochemical, thiab lwm yam.

Cov nram qab no yog cov khoom siv tshuaj lom neeg kawg, xws li yas, roj hmab, tshuaj tua kab, chiv, thiab lwm yam, uas sawv cev rau lub tuam txhab JF Technology, LL log tsheb, RL chemicals, HR Hengsheng, thiab lwm yam.

04 Kev soj ntsuam xav tau thiab kev ua lag luam sib txawv

Polyurethane ua los ntawm MDI muaj ntau yam kev siv downstream, feem ntau yog siv rau hauv kev tsim kho kev lag luam, kev lag luam hauv tsev, khoom siv hauv tsev, kev lag luam tsheb thauj mus los, kev lag luam khau, thiab lwm yam. Yog li ntawd, MDI kev noj zaub mov muaj feem cuam tshuam nrog kev lag luam thoob ntiaj teb kev vam meej.

Los ntawm kev xav thoob ntiaj teb, tag nrho cov qauv siv ntawm polymerized MDI hauv 2021 feem ntau yog: 49% rau kev tsim kho kev lag luam, 21% rau cov khoom siv hauv tsev, 17% rau cov nplaum, thiab 11% rau tsheb.

Los ntawm kev xav hauv tsev, qhov kev faib ua feem ntawm cov qauv siv polymerized MDI hauv 2021 feem ntau yog: 40% rau cov khoom dawb, 28% rau kev tsim kho kev lag luam, 16% rau cov nplaum, thiab 7% rau tsheb.

05 Cov qauv sib tw

Cov khoom siv ntawm MDI nthuav qhia cov qauv kev sib tw ntawm oligopoly. Muaj yim lub tuam txhab loj MDI nyob hauv lub ntiaj teb, thiab peb lub tuam txhab loj tshaj plaws los ntawm lub peev xwm yog WH Chemical, BASF thiab Covestro, nrog lub peev xwm ua ke ntawm peb lub lag luam suav txog ntau dua 60% ntawm lub ntiaj teb tag nrho cov peev txheej tsim khoom. Ntawm lawv, WH Chemical yog lub tuam txhab ua lag luam hauv Tuam Tshoj MDI kev lag luam thiab lub ntiaj teb loj tshaj plaws MDI kev lag luam.