Yintoni indlela yokusebenza kwee-Amine Catalysts kwiPolyurethane?
Ii-amine catalystsZiyinxalenye ebalulekileyo yemveliso ye-polyurethane kwaye zizinto ezibalulekileyo zokukhawulezisa ezikhawulezisa kakhulu impendulo phakathi kwee-polyols kunye nee-isocyanates (isondlo esiphambili semveliso ye-polyurethane foam), zilawula kwaye zilinganise impendulo ye-gel kunye ne-gas okanye i-foam reaction eyenza i-foam. Zenza oku ngokunciphisa amandla okusebenza afunekayo kwiimpendulo zeekhemikhali, okubangela ukwanda kwe-foam okukhawulezayo nokulawulwa ngakumbi kunye nokuqina. Ii-amine catalysts zisebenza ngokukodwa kuba zithatha inxaxheba ngokukhutheleyo kwimpendulo, amaqela empendulo kwisakhiwo sawo se-molecular anokusebenzisana nee-isocyanates, kwaye ii-amine catalysts zihlala zenza phakathi kwe-0.1% kunye ne-5.0% yeefomyula ze-polyurethane. Le propati ikhethekileyo ibenza bakwazi ukubopha kwi-polyisocyanates, bazinzise i-polyurethane matrix yokugqibela kwaye baqinisekise ukunamathela kwayo kwi-substrate.
Inkqubo yokulungisa i-amine catalyst kwi-polyurethane foam ikhuthaza kakhulu iimpendulo ezimbini eziphambili: i-polyol-isocyanate reaction (ukwakheka kweebhondi ze-carbamate) kunye ne-isocyanate-water reaction (ukuveliswa kwe-carbon dioxide). Le mpendulo yokugqibela ivelisa amaqamza, okwenza isakhiwo seseli se-foam. Ngale ntshukumo imbini, i-amine catalyst ivumela inkqubo elungeleleneyo yokufutha kunye nokunyanga, iqinisekisa ukuba i-foam iyanda ngokulinganayo ngelixa iqina ibe sisakhiwo esizinzileyo. Ii-catalysts ezifanaI-MXC-70ikwabonelela nge-response curve egudileyo enyukayo, oko kuthetha ukuba ikhuthaza ukunyuka kancinci kwe-viscosity ye-foam. Oku kubangela ukuba isakhiwo se-honeycomb silawulwe ngakumbi kwaye sifane, nto leyo enceda ukuphucula ukuqina kunye nokuzinza kwe-foam.
Intsimi yokusetyenziswa kwee-Amine Catalysts
Ii-amine catalysts zisetyenziswa kwiintlobo ngeentlobo zezicelo ze-polyurethane, kuquka ii-foams ezithambileyo neziqinileyo, ii-elastomers, ii-coatings, ii-adhesives, kunye nee-sealants. Ekuveliseni ii-foams ezithambileyo, zinceda ekufezekiseni ukuthamba kunye nokuguquguquka okufunekayo, okwenza zibe zilungele ii-cushion zefenitshala, iibhedi kunye nezihlalo zeemoto. Kwiizicelo ze-foam eziqinileyo, ezifana neepaneli zokufaka izinto, izixhobo, kunye nee-spray foams, ii-amine catalysts zikhuthaza izakhiwo zeeseli ezivaliweyo ezinoxinano oluphezulu oluphucula ubushushu kunye nokuzinza kobukhulu.
Ii-catalysts ze-amine ezifana ne-MXC-70 zifanelekile kakhulu kwiindlela ezinobuthathaka ngenxa yeempawu zazo eziphantsi zevumba, ezingakhuphi umbane. Kwizixhobo zasekhaya, zonyusa ukunamathela kwi-substrates zesinyithi nezeplastiki, nto leyo ebalulekileyo ekugqumeni ubushushu. Kwi-spray kunye ne-box foams, ezi catalysts zivumela ukwandiswa kwe-foam okusebenzayo kunye nokunamathela kwi-substrate ngelixa zinciphisa ivumba eliseleyo kunye nokukhupha umbane kwaye zihlangabezana nemigangatho yokusingqongileyo kunye nemithetho.
Ngokubanzi, ukuguquguquka nokusebenza kakuhle kwee-amine catalysts kuzenza zibe yinxalenye ebalulekileyo kumashishini afuna ukugquma i-polyurethane, ukugquma, kunye neempawu zokubopha. I-Mingxu Chemical Company ibisoloko ivelisa ii-polyurethane catalysts kangangeminyaka engaphezu kwama-20, sinendlela yenkqubo engcono kakhulu kunye neqela leengcali zokuphucula nokuhlaziya iimveliso ze-catalyst kwimarike, kukho umboneleli omkhulu, abathengi bamkelekile ukuba beze kukubonisana.
Ixesha leposi: Okthobha-29-2024