A zamanin yau, TDI ko MDI an zaɓi su zama manyan kayan abinci don yawancin samfuran Put, ko coming wakili, mai laushi da wuya foaming, elasticity pu fenti. Ha \ hkowane,ko dai donTdiorMdi, sazukowa benzeneA cikin TDI da MDIHaɗa kai tsayesga daban-dabanisocyanestergungun mutane, da Pi Bond samun Conjugate da NCO da ke kusa da NCO. A karkashin tasirin lIigh, zafi, oxygen, musamman radiation na ultviolet, shina iya haifar da haɗin ammonia esterdasamar da amine mai aromatic, wandana benicenesake tsara bayanhadewa. Wannan zai haifar da ƙungiyoyin chromophoric wanda ke haifar da launin rawaya a kan samfuran PU na ƙarshe.Idon ɗan adam yana da matukar kulawa da launi, yawanci fewan ppm na marasa launuka zasu haifar da bayyanar samfuran rawaya.
Don magance matsalar yellaging, mafi mahimmancin hanya shine amfani da HDI ko IPDI maimakon TDI da MDL a matsayin mahimmin kayan da ba tare da haɗi kai tsaye tsakanin Benzene ba dangane da IPZE. Amma farashin waɗannan albarkatun ƙasa suna da irin waɗannan kasawa: Farashin ya fi tsada, ƙwarewar sinadarai bai isa ba .... Wannan ya hana gabatarwar HDI akan PU.
Wani bayani shine ya cika gas na Igener a cikin aiwatar da samarwa da ajiya don ware lambar tare da iskar oxygen kamar yadda zai yiwu. Hanya mafi inganci ita ce ƙara antioxidant kumaUV, wanda zai iya hanawa da jinkirin abin da ya faru na Pu ya yi rawaya.
Yiho Hn130 wakilin amine anti-rawaya ne. Shi'S amfaniA matsayin mai jan gas a cikin tsarin samarwa, yana da kyakkyawan tsari na nitric oxide (a'a)danitrogen dioxide (no2),dainganci ya hanaYellowing ya haifar daFarin gas
Ana amfani da Yiho Hn130 a PUMumming kayan, kayan kwalliyar takalmi, FIsthane, FICHYURAN SARKIN MULKIN SAMAs.
Kullum ana maraba da ku don tuntuɓannan don yin bincike!
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Lokaci: Nuwamba-22-2021