01 Qhov xwm txheej dav dav

MDI (diphenylmethane diisocyanic acid) yog cov khoom siv polyurethane uas tau tsim los ntawm isocyanate, polyol thiab nws cov neeg sawv cev pabcuam, uas yog siv rau hauv cov khoom siv hauv tsev, tsev, kev thauj mus los thiab lwm yam xwm txheej.

MDI yog suav hais tias yog ib qho ntawm cov khoom loj uas muaj cov teeb meem siab tshaj plaws hauv kev lag luam tshuaj lom neeg. Cov txheej txheem tsim cov isocyanate yog ntev, suav nrog cov tshuaj tiv thaiv nitration, cov tshuaj tiv thaiv txo qis thiab cov tshuaj tiv thaiv acidification.

Muaj ob txoj kev tsim khoom tseem ceeb ntawm MDI: phosgenation thiab non-phosgenation. Cov txheej txheem phosgene yog cov thev naus laus zis tseem ceeb rau kev tsim khoom lag luam ntawm isocyanates tam sim no, thiab nws kuj yog tib txoj kev uas tuaj yeem ua tiav kev tsim khoom loj ntawm isocyanates. Txawm li cas los xij, phosgene muaj tshuaj lom heev, thiab cov tshuaj tiv thaiv yuav tsum tau ua nyob rau hauv cov xwm txheej acid muaj zog, uas xav tau cov khoom siv thiab thev naus laus zis siab.

02 hom

MDI feem ntau muab faib ua peb pawg: polymer MDI, pure MDI thiab modified MDI:

Polymerized MDI yog cov khoom siv raw rau kev tsim cov polyurethane ua npuas ncauj thiab semi-hard ua npuas ncauj, thiab nws cov khoom tiav lawm yog siv dav hauv lub tub yees, cov ntaub ntawv rwb thaiv tsev thermal, cov khoom siv kho tsheb thiab lwm yam lag luam.

MDI ntshiab feem ntau yog siv rau hauv kev tsim ntau yam polyurethane elastomers, feem ntau yog siv rau hauv kev tsim cov thermoplastic polyurethane elastomers, spandex, PU tawv slurry, khau nplaum, thiab kuj siv rau hauv cov ntaub ntawv microporous elastomer, xws li cov hauv qab, cov log tsheb khov kho, cov ua npuas ncauj tus kheej, lub tsheb bumpers, cov khoom sab hauv, thiab kev tsim cov polyurethane elastomers cam khwb cia.

Raws li cov khoom lag luam MDI series, hloov kho MDI yog kev txuas ntxiv ntawm cov khoom MDI ntshiab thiab cov khoom MDI polymerized uas siv ntau hauv kev ua lag luam tam sim no, thiab tuaj yeem muab cov khoom siv tshwj xeeb thiab cov khoom ua tiav raws li qhov sib txawv ntawm cov qauv tsim khoom thiab cov txheej txheem tsim khoom, yog li siv dav hauv cov npuas mos, elastomers, coatings, adhesives thiab lwm yam teb.

03 Sab saud thiab sab hauv qab ntawm cov saw hlau kev lag luam

Cov dej ntws mus rau roj, roj av, hlau ore thiab lwm yam khoom siv;

Cov chaw nruab nrab yog cov tshuaj lom neeg ntawm cov khoom siv raw thiab cov khoom kawg, sawv cev rau WH Chemical, WX petrochemical, thiab lwm yam.

Cov downstream yog cov khoom siv tshuaj lom neeg kawg, xws li yas, roj hmab, tshuaj tua kab, chiv, thiab lwm yam, sawv cev rau lub tuam txhab JF Technology, LL log tsheb, RL tshuaj lom neeg, HR Hengsheng, thiab lwm yam.

04 Kev tshuaj xyuas qhov xav tau thiab qhov sib txawv ntawm kev ua lag luam

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

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

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

05 Tus qauv sib tw

Sab muab khoom ntawm MDI qhia txog tus qauv kev sib tw ntawm oligopoly. Muaj yim lub tuam txhab tsim khoom MDI loj hauv ntiaj teb, thiab peb lub tuam txhab tsim khoom saum toj kawg nkaus los ntawm lub peev xwm yog WH Chemical, BASF thiab Covestro, nrog rau lub peev xwm ua ke ntawm peb lub tuam txhab suav txog ntau dua 60% ntawm lub ntiaj teb tag nrho lub peev xwm tsim khoom. Ntawm lawv, WH Chemical yog lub tuam txhab ua lag luam hauv Suav teb kev lag luam MDI thiab lub tuam txhab tsim khoom MDI loj tshaj plaws hauv ntiaj teb.