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Kugwiritsa Ntchito Kwa Ddi Mu Nsalu Zovala

Diisocyanate (DDI) ndi aliphatic diisocyanate yapadera yokhala ndi msana wa carbon wa atom dimer fatty acid. Kapangidwe kameneka kamapatsa DDI kusinthasintha komanso kumamatira kuposa ma isocyanate ena a aliphatic. DDI ili ndi poyizoni wochepa, yopanda chikasu, imasungunuka m'masungunulo ambiri am'madzi, madzi otsika kwambiri komanso mamasukidwe akayendedwe. DDI ndi mtundu wa magwiridwe awiri a Isocyanate, imatha kugwira ntchito ndi mitundu iwiri kapena ingapo yama hydrogen kuti apange polima. DDI itha kugwiritsidwa ntchito popanga miyala yolimba, kumaliza nsalu, mapepala, zikopa ndi zotchinga nsalu, mankhwala osungira nkhuni, kuphika kwamagetsi ndikukonzekera zida zapadera za polyurethane (urea) elastomers, zomatira ndi sealant, ndi zina zambiri.

M'makampani Opangira nsalu, DDI ikuwonetsa chiyembekezo chabwino chogwiritsa ntchito m'malo othamangitsa madzi ndikuchepetsa nsalu. Imakhala yosazindikira madzi kuposa isocyanates onunkhira ndipo itha kugwiritsidwa ntchito kukonzekera ma emulsion okhazikika amadzimadzi.

Kugwiritsa ntchito 0.125% DDI kumapangitsa kuti nsalu ikhale yofewa; Nsalu zoyesedwa ndi zofewetsa za cationic zosasunthika zimasinthanso chimodzimodzi pambuyo pa kutsuka 26. Mafuta obwezeretsa madzi ogwiritsa ntchito 1% DDI ali ndi mphamvu yofananira yamadzi yobwezeretsa madzi ngati mafuta a pyridine othamangitsa madzi (kuyesa kwa AATCC).

DDI itha kusintha mphamvu ya madzi othamangitsira madzi komanso mafuta othamangitsira nsalu. Pogwiritsidwa ntchito limodzi, DDI imatha kusintha kwambiri nsalu zotetezera madzi ndi mafuta.

Kuyeza konse kwa ma labotale ndi kumunda kwawonetsa kuti DDI imatha kukana kutsuka ndi kuyeretsa kowuma kuposa fluoride kapena zowonjezera zina monga antistatic agents.

DDI, yokonzedwa kuchokera ku mafuta ochepa, ndi mtundu wobiriwira wosakanikirana ndi isocyanate. Poyerekeza ndi chilengedwe chonse cha TDI, MDI, HDI ndi IPDI, DDI siyopanda poizoni komanso yosalimbikitsa. Ndi kutchuka kwa zinthu zopangira asidi ku China komanso kuchuluka kwa anthu pachuma chazida zoteteza zachilengedwe ndi chitukuko chokhazikika, kufunikira kogwiritsa ntchito zida zowonjezeredwa pokonzekera DDI kwatuluka pang'onopang'ono, zomwe zili ndi tanthauzo lofunikira pakulimbikitsa chitukuko cha makampani polyurethane.


Post nthawi: Dis-15-2020