Kuyini i-Dimeryl Diisocyanate (DDI)
I-Dimeryl Diisocyanate (DDI) iyi-aliphatic diisocyanate ehlukile engasetshenziswa ukulungiselela ama-polymer anamakhemikhali aqukethe i-hydrogen esebenzayo. Iyinhlanganisela yeketanga elide enomgogodla we-36-carbon dimer fatty acid. Isakhiwo seketanga eliyinhloko sinikeza i-DDI ukuguquguquka okuphezulu, ukumelana namanzi kanye nobuthi obuphansi kwamanye ama-aliphatic isocyanates. I-DDI iwuketshezi olune-viscosity ephansi oluncibilika kalula ezinyibilikisini eziningi ze-polar noma ezingezona ze-polar. Ngenxa yokuthi iyi-aliphatic isocyanate, inezici zokungaphuzi. Inezinzuzo eziningi zobuthi obuphansi, kulula ukuyisebenzisa, incibilika ezinyibilikisini eziningi, isikhathi sokusabela esilawulekayo kanye nokuzwela kwamanzi okuphansi. Iyinhlobo ejwayelekile ye-isocyanate ekhethekile eluhlaza evuselelekayo, engasetshenziswa kabanzi ekuqedeni indwangu, ama-elastomers, ama-adhesive nama-sealant, ukumboza, ama-ink kanye neminye imikhakha yezempi neyezomphakathi.
CHA yaziwa ngokusebenza kwayo okumangalisayo kanye nokuguquguquka kwayo, okwenza kube ukukhetha okuhle kakhulu kokwenza imikhiqizo ye-polyurethane esezingeni eliphezulu. Isakhiwo sayo sama-molecule siqukethe amaqembu amabili e-isocyanate, ayenza ikwazi ukusabela ngama-polyols namanye ama-compounds ukwakha ama-polyurethane polymers. Lokhu kusebenza kuvumela ukwenza ngokwezifiso izinto ze-polyurethane ezinezakhiwo ezithile, njengokuguquguquka, ukuqina, kanye nokumelana nokushisa.
Enye yezinzuzo ezibalulekile ze- CHA yikhono layo lokuthuthukisa ukusebenza nokuqina kwemikhiqizo ye-polyurethane. Ngokufaka i-DDI ekwakhiweni kwe-polyurethane, abakhiqizi bangathuthukisa amandla, ukumelana nokuguguleka, kanye nokumelana namakhemikhali kwezinto ezitholakalayo. Lokhu kwenza i-DDI ibe yingxenye ebalulekile ekukhiqizweni kwezimbozo kanye nezinamathiselo ezisetshenziswa ezisetshenziswayo ezidinga amandla, njengembozo yezimoto, yokwakha, kanye neyezimboni.
Ngaphezu kokusetshenziswa kwayo ekumbozeni nasezintweni zokunamathisela, CHA isetshenziswa kabanzi ekukhiqizweni kwama-polyurethane elastomers nama-foam. Lezi zinto ziyaziswa ngenxa yokuqina kwazo, ukumelana nokushayisana, kanye nezakhiwo zokubopha, okwenza zifaneleke ukusetshenziswa ezimbonini ezifana nezicathulo, ifenisha, kanye nemishini yezemidlalo. Ngokusebenzisa izakhiwo ezihlukile ze-DDI, abakhiqizi bangakha ama-polyurethane elastomers nama-foam ahlangabezana nezidingo zokusebenza eziqinile zalezi zimakethe ezahlukahlukene.
Ngaphezu kwalokho, CHA inikeza ukuhambisana okuhle kakhulu nohlu olubanzi lwama-polyol kanye nezithasiselo, okuvumela abakhiqizi ukuthi bahlele izakhiwo zezinto ze-polyurethane ukuze zihlangabezane nezidingo ezithile zohlelo lokusebenza. Lokhu kuguquguquka kwenza kube lula ukuthuthukiswa kwezixazululo ezenziwe ngokwezifiso zezimboni ezahlukahlukene, okuhlanganisa ukwakhiwa, ezokuthutha, kanye nezimpahla zabathengi. Kungakhathaliseki ukuthi kuthuthukisa ukuqina kwezimbozo ezivikelayo noma ukuthuthukisa induduzo yezinto zokubopha, i-DDI idlala indima ebalulekile ekwenzeni kube nokusungula izinto ezintsha kanye nokusebenza kahle emikhiqizweni esekelwe ku-polyurethane.
Njengomhlinzeki ohamba phambili we CHA, sizibophezele ekuhlinzekeni ngemikhiqizo esezingeni eliphezulu nethembekile kumakhasimende ethu. Ubuchwepheshe bethu bobuchwepheshe kanye nolwazi lwethu lwemboni kusenza sikwazi ukusekela abakhiqizi ekwenzeni ngcono ukwakheka kwabo kanye nokufeza ukusebenza komkhiqizo abawufisayo. Ngohlu lwethu oluphelele lwamazinga e-DDI kanye nokusekelwa kobuchwepheshe, silwela ukuba ngumlingani othembekile wamabhizinisi afuna ukuthuthukisa ukusebenza kanye nokusimama kwemikhiqizo yawo ye-polyurethane. Okwamanje ngamakhono aqinile e-R&D, aqinisekisa ukuthi singakwazi ukucwaninga nokuthuthukisa i-DDI entsha ngokwesidingo esikhethekile samakhasimende ethu.
I CHA ukuba nempahla ethile ebonakalayo uma kuqhathaniswa ne-IPDI, MDI, TDI.
| Imininingwane | Isisindo sama-molecule esihlobene | Okuqukethwe kwe-NCO, % | I-chlorine engafakwa amanzi, % | Ukucindezela komusi, mmHg | Indawo yokuncibilika, ℃ | Ubuthi |
| CHA | 600 | 13.6 ~ 15.2 | ＜0.05 | ＜0.001（25℃） | -34.4 | ubuthi obuphansi |
| I-IPDI | 222.2 | 37.8 | 0.02 | 0.003(20℃） | -60 | ubuthi obuphakathi |
| I-TDI | 174 | 48.3 | 0.01 | 0.042(20℃） | 5 ~ 6.5 | ubuthi obukhulu |
| I-MDI | 250.26 | 33.6 | 0.05 | - | 38 | ubuthi obuphakathi |
Imininingwane yethu ye CHA kanje:
| ITEM | I-INDEX |
| Ukubukeka | Uketshezi olunamafutha olungenambala nolubonakalayo |
| Okuqukethwe kwe-Isocyanate, % | 13.60 ~ 15.00 |
| I-hydrolytic chloride, % | ≤0.05 |
| Inani le-PH | 6.0 ~ 7.0 |
| Ubuningi, g/ml | 0.920 ~ 0.930 |
| Umswakama, % | ≤0.02 |
| Ukuqina, mPa.s, 20℃ | ≤170 |
| * Ngaphezu kwalokho: Inkampani ingacwaninga futhi ithuthukise i-DDI entsha ngokwesidingo esikhethekile samakhasimende ethu. | |
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