Ama-Amine Ekukhiqizweni Kwe-Polyurethane kanye Nendima Yama-Catalyst

I-Polyurethane iyi-polymer eguquguqukayo esetshenziswa ezinhlotsheni ezahlukene, kusukela kuma-foam kanye ne-coating kuya kuma-elastomer kanye nama-adhesive. Ukukhiqizwa kwe-polyurethane kuhilela ukusabela kwamakhemikhali okuyinkimbinkimbi phakathi kwama-polyol nama-isocyanates, futhi ama-catalyst adlala indima ebalulekile ekuqhubeni lokhu kusabela kahle. Phakathi kwezinhlobo ezahlukene zama-catalyst asetshenziswayo, ama-catalyst asekelwe kuma-amine abaluleke kakhulu ngenxa yamandla awo okusheshisa ukusabela nokulawula izakhiwo zomkhiqizo wokugcina.

Ama-Amine Ekukhiqizweni kwe-Polyurethane

Ama-Amine ayizinto eziphilayo ezitholakala ku-ammonia futhi abonakala ngokuba khona kweqembu elilodwa noma ngaphezulu le-alkyl noma i-aryl elixhunywe ku-athomu ye-nitrogen. Emongweni wokukhiqizwa kwe-polyurethane, ama-catalyst e-amine asetshenziswa ukwenza lula kokubili ukusabela kwe-urethane (i-polyol ne-isocyanate) kanye ne-urea (amanzi ne-isocyanate). Lawa ma-catalyst angahlukaniswa kabanzi ngama-tertiary amine kanye nama-polyol asekelwe kuma-amine.

1. Ama-Amine Asezingeni Eliphezulu: Lawa ama-catalyst e-amine asetshenziswa kakhulu ekwakhiweni kwe-polyurethane. Izibonelo zifaka phakathi i-triethylenediamine (TEDA), i-dimethylcyclohexylamine (DMCHA), kanye ne-bis(dimethylaminoethyl) ether (BDMAEE). Lawa ma-compound athuthukisa amazinga okusabela, athuthukisa ukwakheka kwe-foam, futhi athonya isakhiwo samaseli ama-polyurethane foam.

2. Ama-Polyol Asekelwe ku-Amine: Lawa ama-polyol asebenza njenge-amine asebenza njenge-polyol kanye ne-catalyst. Awusizo kakhulu ekudaleni izinhlelo ze-foam eziguquguqukayo lapho kudingeka khona ukusabela okwengeziwe.

 I-Catalyst

, noma i-1,4-diazabicyclo[2.2.2]octane, iyisikhuthazi se-amine esidumile embonini ye-polyurethane. Isebenza kahle kakhulu ekuvuseleleni kokubili ukusabela kwe-gelling (ukwakheka kwe-urethane) kanye nokuvunguza (ukwakheka kwe-carbon dioxide). Isakhiwo esiyingqayizivele se-siyivumela ukuthi ikhuthaze ukusabela okulinganiselayo, iqinisekise izakhiwo ze-foam ezifanele kakhulu njengobuningi, usayizi weseli, kanye namandla omshini.

15futhi T

1. 15: Lesi yi-catalyst esezingeni eliphezulu esekelwe kuma-amine eyenzelwe ukusetshenziswa ekusetshenzisweni kwe-polyurethane foam. Inikeza umsebenzi omuhle kakhulu wokuvuselela, ikhuthaza amazinga okusabela okusheshayo kanye nezakhiwo ze-foam ezithuthukisiwe. I-15 isebenza kahle kakhulu ezinhlelweni ze-foam eziguquguqukayo neziqinile, inikeza izici zokucubungula ezithuthukisiwe kanye nokusebenza okuphezulu komkhiqizo wokugcina.

2. T: Le catalyst ingenye indlela yomndeni, eyenzelwe ngqo ukusetshenziswa kwe-polyurethane ethile. I-T yaziwa ngomsebenzi wayo oqinile wokwenza izinto zibe zintsha kanye nekhono layo lokunikeza ukusebenza okulinganayo nokuthembekile ekwakhiweni kwe-foam okuhlukahlukene. Isetshenziswa kabanzi kokubili ezinhlelweni ze-foam eziguquguqukayo neziqinile, inikeza ukulawula okuthuthukisiwe phezu kwezakhiwo zomzimba ze-foam.

 Isiphetho

Ama-Amine, ikakhulukazi ama-amine esithathu afana ne- , adlala indima ebalulekile enqubweni yokukhiqizwa kwe-polyurethane. Ama-Catalyst afana ne-15 kanye ne-T abalulekile ekufinyeleleni amazinga okusabela afunwayo kanye nezakhiwo ze-foam, okuqinisekisa imikhiqizo ye-polyurethane esezingeni eliphezulu. Ngokuqonda nokusebenzisa la ma-catalyst ngempumelelo, abakhiqizi bangenza ngcono izinqubo zabo zokukhiqiza futhi bathuthukise ukusebenza kwezicelo zabo ze-polyurethane.