Pentamethyldiethylenetriamine (pmdeta)

Ii-methyl ezimbini ezimbini i-ethyleneamine ezintathu ziyinto esebenzayo kakhulu yokusabela kwe-polyurethane.Eyona nto idala ukusabela kogwebu, kwaye ikwasetyenziselwa ukulungelelanisa ugwebu olupheleleyo kunye nokusabela kwejeli.Isetyenziswa ngokubanzi kuzo zonke iintlobo ze-polyurethane eqinile ye-foam, kuquka i-polyisocyanurate plate eqinile igwebu.Ngenxa yefuthe layo elinamandla le-foam, inokuphucula i-fluidity ye-foam, ngoko iphucula inkqubo yokuvelisa kunye nokuphucula umthamo wemveliso.Ihlala ibelana nge-DMCHA njalo njalo.Ezintlanu ii-methyl ezimbini i-ethyleneamine ezintathu ze-amine zisetyenziswa yodwa njenge-catalyst ye-polyurethane foam formula, kwaye inokwabelwana ngayo nezinye ii-catalysts.0-2.0 iinxalenye nge-100 lamalungu e-polyol.
Ukongeza kuqulunqo oluqinileyo lwegwebu, ii-methyl ezimbini ezimbini ze-ethyleneamine ezintathu zinokusetyenziselwa ukuveliswa kwe-polyether polyurethane igwebu elithambileyo kunye negwebu lokubumba.Ngokomzekelo, i-70% ye-pentamethylenediethylenetriamine isetyenziswa kakhulu ekuqulunqweni kweemveliso ze-foam ezithambileyo.I-catalyst inomsebenzi ophezulu, isantya sogwebu olukhawulezayo, ukuqina okuphezulu kunye nomthamo ophezulu wokuthwala.Kwi-foam ethambileyo, i-0.1-0.5 phr ye-catalyst nge-100 phr ye-polyether inokufumana umphumo ongcono.Inokusetyenziswa kwakhona njenge-catalyst encedisayo ye-foam enzima.
I-methyl ezimbini ezimbini ze-ethyleneamine ezintathu ze-amine quaternary ammonium ityuwa yinto ebambezelekayo yokukhuthaza ugwebu oluthambileyo, olusetyenziselwa ukwandisa ixesha logwebu.Ifanelekile kwiimveliso ze-foam ezinemilo enzima kunye nebhokisi yebhokisi yenkqubo yokugaya, kwaye iphucula isakhiwo se-foam kunye nokuphucula umgangatho wokubumba.Uluhlu lwedosi yalo lubanzi kakhulu, kwaye utshintsho lwedosi alunampembelelo icacileyo kwixesha lokwenza mhlophe;Kodwa ukwandisa idosi kunokunciphisa ixesha lokunyuka kwegwebu kunye nokunciphisa ixesha lokunyanga.