I-MOFAN TMEDA (N,N,N',N'-tetramethylethylenediamine, CAS 110-18-9) sisincedisi se-amine esicocekileyo kakhulu esenzelwe iinkqubo zokwenza i-foam zorhwebo. Le khemikhali iguquguqukayo isebenza njengesincedisi sokuvuthela kunye ne-gelling esilinganayo ngexesha lokucubungula i-polyol engamanzi. Iinjineli zeenkqubo zixhomekeke kwiipropati zayo ezahlukeneyo ukukhuthaza ukwakheka kolusu olugudileyo kwi-polyurethane foams. Esi sincedisi sinika ulawulo lwe-kinetic oluqikelelweyo kuzo zonke izicelo ezahlukeneyo zenkqubo ye-polyurethane. Iinjineli zeenkqubo kunye nabaqhubi bezityalo balandela esi sikhokelo sokwenziwa kobugcisa ukuze baphucule iiparameter zenkqubo ngelixa begcina imigangatho yokhuseleko yokusebenza engqongqo. Iingcali zokuthenga nazo zifumana ulwazi olubalulekileyo lobuchwephesha malunga nokuzinza kwezinto kunye nokusebenza okuthembekileyo. Esi sikhokelo sibanzi sixhasa ulawulo oluchanekileyo lomgangatho kuzo zonke izibonelelo.

Izinto ezibalulekileyo ekufuneka ziqwalaselwe

Iipropati zeekhemikhali ze-MOFAN TMEDA

Ulwakhiwo lweMolekyuli kunye neMigangatho yokuCoca

Iimpawu ezisisiseko zeekhemikhalimofan tmedaichaza ukusebenza kwayo kwimveliso ye-polyurethane. Le molekyuli inefomula ye-molecular C6H16N2. Ibonisa ubunzima be-molecular obuyi-116.2 g/mol. Imigangatho yeenkcukacha zorhwebo ifuna ubumsulwa obuncinci be-98.00%. Ulwelo luqulathe umxholo wamanzi ophezulu we-0.50%. Ubumsulwa bolwelo bugcina ukusabela kweekhemikhali rhoqo ngexesha lokucubungula. Ulwakhiwo lwekhemikhali oludibeneyo lubonelela ngoxinano oluphezulu lwe-amine. Olu lwakhiwo lwe-amine olukhethekileyo lukhawulezisa impendulo ye-polyurethane engundoqo.

Ii-formulators zithelekisa ubunzima beemolekyuli ze-catalyst ukuze zivavanye ukusebenza kwe-kinetic kuzo zonke iifomyula. Ulwakhiwo oluthile lweemolekyuli lunika le khemikhali iimpawu zomzimba ezahlukileyo.

Ulwakhiwo olulula lwe-amine luvumela ukuhamba ngokukhawuleza kwiinkqubo ze-polyol. Olu lwakhiwo lukhawulezisa izinga lokusabela kwejeli.

Uzinzo lweSolvency kunye nePolyol Blend

Iimpawu zomzimba ziquka ukubonakala kolwelo olucacileyo, olungenambala ukuya kwingca. Izinto eziluhlaza zikhupha ivumba elibonakalayo le-ammoniacal. Izongezo zolwelo zibonisa ukunyibilika kwe-100% emanzini, kwi-alcohol nakwi-organic solvents. Ukunyibilika okupheleleyo kuphucula ukuphathwa kolwelo ngokubanzi ngexesha lokuxuba izinto eziluhlaza. Ubumsulwa beekhemikhali buthintela ukwahlulwa kwezithako ezisebenzayo kwiitanki zokugcina. Iprofayili yokunyibilika iphucula ngokuthe ngqo iipropati zemveliso yefoam yokugqibela.

Ixutywa namanzi, iialcohols, ii-esters, kunye ne-polyols ezininzi

Ukuhambelana okunamandla kwe-solvent kuzinzisa imixube ye-polyol eyinkimbinkimbi. Iindawo ze-amine ezisebenzayo zivelisa isiphumo esithe ngqo sokutsala ngexesha lokuxuba ulwelo. I-solvent ebanzi inika ii-formulators ulawulo lwenkqubo oluqikelelweyo. Ii-formulators zijonga isiphumo esinamandla sokuzinzisa kulo lonke ugcino lwecandelo lolwelo. Iipropati zeekhemikhali ezilinganayo zikhusela umsebenzi we-catalyst ngexesha lokuvelisa ixesha elide. Olu lwakhiwo lwe-molecular luqinisekisa ukuphiliswa okufanayo kwizicelo ezahlukeneyo.

Indima njenge-Polyurethane Catalyst

Ibhalansi yeKinetic yeGelling kunye nokuVuthela

Iifomyula zenkqubo zihlalutya iiparameter zesantya se-kinetic ukuze zikhethe isongezo esifanelekileyo kwiinkqubo ezijoliswe kuzo.MOFAN TMEDAisebenza njenge-polyurethane catalyst ene-reactivity elinganiselayo ngexesha lokuveliswa kwe-polyurethane. Le compound esebenzayo ibonisa umsebenzi ophakathi ngokubanzi. Olu hlobo lokuziphatha luzinzisa ukuguquka kwegesi kunye nokwakheka kwenethiwekhi ye-polymer. Ii-formulators zenkqubo zilinganisela ngononophelo iiparameter ze-kinetic ukuthintela ukwakheka kweziphene zesakhiwo ngexesha lokucubungula. Isantya esiphezulu se-gelling sibangela ukuqina kwangaphambi kwexesha ngaphambi kokuba kuzaliswe ngokupheleleyo kwesikhunta. Ngokwahlukileyo koko, isantya esiphezulu sokuvuthela senza imingxunya ye-pinholes kunye nesakhiwo seseli esirhabaxa. I-MOFAN TMEDA ibonelela ngeprofayili ye-kinetic ephakathi ejongana nemiba yomibini ngaxeshanye. Ukucubungula ulwelo kuhlala kuzinzile kubushushu bemveliso obuhlukeneyo.

Kuyilo lwenkqubo ye-polyurethane foam, i-gelling activity rate constant k1 ilingana ne-4.19 (×10). I-blowing activity rate constant k2 ilingana ne-1.14 (×10). Le kinetic balance ivelisa umlinganiselo ocacileyo wokuvuthela/ukuvuthela we-2.72 (×10⁻¹). Abenzi be-formula bavavanya la manani e-kinetic ukuze bayile amaqhinga okwakha aqinileyo. Umzekelo, i-TEDA ibonelela nge-gelling enamandla nge-k1 ye-10.90 kunye ne-k2 ye-1.45. Ngokwahlukileyo koko, i-PMDETA isebenza njenge-catalyst yokuvuthela enamandla nge-k1 ye-4.26 kunye ne-k2 ye-15.90. I-BDMAEE ikwathanda ukuvuthela, ibonisa i-k1 ye-2.99 kunye ne-k2 ye-11.70. I-DMCHA ibonisa umsebenzi ophantsi ngokubanzi nge-k1 ye-2.22 kunye ne-k2 ye-0.83. I-blowing/gelling ratio ye-TMEDA ihambelana nomlinganiselo we-2.72 (×10⁻¹) we-DMAEMP. Le phrofayili ilungelelanisiweyo inika iingenelo eziphambili zokucubungula ekulawuleni ukunyuka kweeseli kunye ne-crosslinking kinetics ngexesha lesigaba ngasinye se-polymer reaction.

Ukusebenza kwe-Nucleophilic Isocyanate-Hydroxyl

Isakhiwo se-molecule esincinci sinika i-MOFAN TMEDA iimpawu zokusebenza ezikhethekileyo. Ii-electron pairs ezingabiwanga kwii-athomu ezimbini ze-nitrogen ziqhuba ukusebenzisana kwe-nucleophilic reaction yokuqala. Esi sakhiwo se-amine senza i-complex yexeshana ene-electrophilic carbon athoms ngaphakathi kwamaqela asebenzayo e-isocyanate. Ngenxa yoko, esi sakhiwo seekhemikhali sinciphisa amandla okusebenza ngokubanzi kwe-urethane gelling reaction. Ukulungelelaniswa kwe-nitrogen electron kukhawulezisa ukongezwa kwe-hydroxyl ngaphandle kokubangela ukwanda okukhawulezileyo nokungalawulekiyo.

Iziko le-amine le-tertiary lisebenza njengeziseko zeLewis eziqinileyo ngexesha le-polymerization. Ukujongwa kwendawo ye-methyl substituents kuvumela ukufikelela ngaphandle kwezithintelo kwiintlobo eziphilayo ezisabelayo. Olu lungiselelo lwendawo lukhawulezisa amazinga okuguqulwa kotywala lwesibini ngaphandle kokuphazamisa amaxesha ekhrimu yomxube wolwelo. Ngenxa yoko, ukwakheka kwenethiwekhi ye-urethane kuqhubeka kakuhle ukusuka ekuthululweni kolwelo kokuqala ukuya ekususweni kokugqibela kwesikhunta.

Iinjineli zeenkqubo zisebenzisa le ndlela ithile yokuvula ukuze ziphucule amaqhinga okwenziwa kwale mihla. Isiphumo esisisiseko sokungenisa sandisa uxinano lwe-electron lwasekuhlaleni kwiindawo ezisebenzayo ekujoliswe kuzo. Esi siphumo se-elektroniki sikhuthaza ukuphiliswa kolusu olungaphezulu ngokulinganayo kwiindawo ze-polyurethane ezibunjiweyo. Ngaphezu koko, isiphumo se-molecular steric sizinzisa ukwahlukana kwesigaba ngexesha lokwandiswa kwenethiwekhi ye-polymer. Esi siphumo se-steric esikwindawo silawula uxinano oludibanisayo kulo lonke umjikelo wonyango. Esi siphumo sidibeneyo sokulungisa siqinisekisa uxinano oluhambelanayo lwe-core, iipropati zomzimba ezifanelekileyo, kunye nokugqitywa komphezulu ogudileyo. Ii-formulators zifumana iingenelo zokusebenza ezicacileyo ngokusebenzisa iiprofayili zonyango eziqikelelweyo kunye nokuziphatha kwe-response exotherm elawulwayo. Inyathelo ngalinye lokuphendula eliphambili lixhamla kule nkqubo ye-tertiary amine catalyst.

Izicelo kwiPolyurethane Formulation

Imveliso yePolyurethane ixhomekeke kakhulu kwizithako zeekhemikhali ezijoliswe kuzo ukulawula iimpawu zezinto.MOFAN TMEDAisebenza njengesixhobo esisebenzayo sokuxhasa i-amine ephezulu kuzo zonke izicelo ezahlukeneyo zokwenza imveliso. Iprofayili yayo yokulinganisela ixhasa iinkqubo ezahlukeneyo ze-polyurethane foam, kubandakanya i-foam ethambileyo, i-semi-rigid foam, kunye ne-rigid polyurethane foams. Iinkqubo zolwelo zizuza kakhulu kwi-flow dynamics ephuculweyo ngexesha lokucubungula. Ulwakhiwo lwe-amine olusebenzayo lwesi sithako luphucula ukuphiliswa komphezulu ngaphandle kokubangela ukuwa kweeseli ngaphambi kwexesha. Ii-formulators zisebenzisa ezi mpawu zeekhemikhali kushishino lweekhemikhali lwehlabathi jikelele ukuphucula imveliso yenkqubo iyonke. Ibhalansi efanelekileyo phakathi kwamanyathelo okusabela ibonelela ngeempawu zomzimba ezihambelanayo kuyo yonke ifomyula ye-foam. Amaqela obuchwephesha axhomekeke kule nkxaso-mali ukugcina uxinano olufanayo kuyo yonke imijikelo yemveliso.

Iinkqubo zeFoam eziqinileyo neziqinileyo

Ii-formulators zikhetha ii-agents ezikhethekileyo zokuvuthela kunye ne-gelling ukuze zihlangabezane neenjongo ezingqongqo zoxinano. Kwi-polyurethane foams eqinileyo, ukwenziwa kwe-foam enoxinano oluphezulu kufuna ukwandiswa kweeseli ezifanayo. Ii-formulators ziyila amaqhinga okwenziwa ukuze zidibanise le amine ikhethekileyo ukuze kuphuculwe iimpawu ze-foam. Esi songezo sikhuthaza ukwakheka kwesikhumba ngokukhawuleza kwiindonga zangaphandle zesikhunta. Olu layer lwesikhumba oluphilisa ngokukhawuleza luvala ulwelo olukhula ngokukhawuleza. Ngenxa yoko, iiphaneli ezicutshungulwayo zifezekisa ukuqina okuphezulu kwesakhiwo kunye nokugqitywa komphezulu ococekileyo.

Iinjineli zeenkqubo zisebenzisa amaqhinga okwenziwa ngokwezifiso ukuzinzisa iinkqubo eziqinileyo. Iindawo zangaphakathi zeemoto, ezifana neendawo zokubeka iingalo kunye needeshibhodi, zifuna ulusu oluthambileyo phezu kwee-cores zesakhiwo ezixineneyo. Isakhiwo se-tertiary amine esisebenzayo sikhawulezisa ukudibana komphezulu okukufutshane. Le mpendulo yendawo idala umaleko wesikhumba oqinileyo ngelixa igcina iipropati zokukhusela ngaphakathi. Ngaphezu koko, iinkqubo ze-thermoplastic soft foam zifumana iingenelo ezikhethekileyo zoomatshini. Isiphumo esilungeleleneyo se-catalytic sithintela imingxunya yomphezulu, sivelise iimpawu ze-foam ezihambelanayo kuzo zonke ii-molds zejometri ezintsonkothileyo. Ii-formulators zilungisa ifomyula nganye ye-polyurethane ukuze ziphucule ukusebenza kakuhle kokuzalisa i-mold kwaye zinciphise amazinga e-scrap. Iinjineli zeenkqubo zijonga iingenelo ezahlukeneyo zokucubungula kwizicelo eziphezulu ngexesha lemveliso ekhawulezayo, ziqinisekisa umgangatho wokuvelisa ophindaphindwayo.

Ukusetyenziswa Okuncedisayo ne-MOFAN 33LV

Iinjineli zihlala zidibanisa ii-catalyst zesibini ukuze ziphucule iiparameter zokucubungula. Ukudibanisa le catalyst kunye ne-MOFAN 33LV kudala inkqubo enamandla ye-synergistic catalyst. I-MOFAN 33LV inika isenzo esinamandla se-gelling nge-triethylenediamine kwi-dipropylene glycol. Isiphumo se-steric se-tertiary amine siphucula i-kinetics yokuvuthela kwinqanaba lokuqala. Le ndlela yokwenza i-dual-catalyst ifezekisa iiprofayili ezifanelekileyo zokunyuka kwe-foam kwaye ifinyeza amaxesha e-demold kakhulu. Ukulinganisa okuchanekileyo kuqinisekisa ukuhambelana okufanelekileyo kwempendulo kuyo yonke inkqubo yokunyuka kwe-foam.

Inkqubo ye-catalyst edibeneyo iphinda ibumbe imo yeseli kwi-polyurethane foams eziguquguqukayo. Iifestile ezincinci, ezifanayo ngakumbi ziyavela ngexesha lokuqala kwekhrimu kunye nejeli. Olu lwakhiwo luzinzileyo lonyusa amandla okuthwala umthwalo ngelixa linciphisa umngcipheko wokuncipha. Abaqhubi bezityalo bajonga amagophe okunyuka okuthe tye ngexesha lokwenziwa kwemveliso enkulu. Ngaphezu koko, usetyenziso oluguquguqukayo lufikelela kumacandelo emizi-mveliso angengowe-foam. I-chemical compound isebenza njenge-accelerator esebenza kakhulu kwiinkqubo ze-epoxy-amine ezinobushushu obuphantsi. Ukuveliswa kwe-elastomer kuxhamla ekukhuleni kwenethiwekhi ye-polymer okuqikelelweyo. Izincamathelisi zomthi we-polyurethane ezinyanga ngokukhawuleza nazo zisebenzisa olu lwakhiwo lwe-amine olukhethekileyo ukukhawulezisa ukwakheka kwebhondi phantsi kweemeko ezingqongileyo. Ii-chemical formulators zihlengahlengisa ezi ndlela zokwenziwa ukuhlangabezana neemfuno zokucubungula eziguqukayo kuzo zonke izicelo zoshishino, ziqhuba uphuhliso oluqhubekayo.

Iingenelo Zokucubungula kunye Nezikhokelo Zokugcina

Ukulungiswa koBume beeSeli zeFoam

I-MOFAN TMEDA iphucula isakhiwo se-microcellular foam ngexesha lokucubungula i-polyurethane. I-catalyst esebenzayo ye-amine inika isiphumo sokuzinza kwiibhamu zegesi ngaphakathi kwe-polyurethane liquid matrix ekhulayo. Ukuxuba kuqhubeka kakuhle ngaphandle kokuwa kwebhamu ngaphambi kwexesha okanye ukulahleka kwegesi. Esi siphumo soomatshini sikhokelela kwiiseli ezincinci, ezifanayo kwiimveliso ze-foam ezigqityiweyo. Uvavanyo lwenkqubo yokwenziwa luqinisekisa umgangatho ohambelanayo, lunceda abenzi be-formula bafezekise iimpawu ze-foam eziphezulu ngaphandle kweziphene zolusu lomphezulu. Iinjineli zenkqubo zixhomekeke kule ndlela ilungelelanisiweyo yokuphucula ukulungelelaniswa kweseli kwimigca ye-foam enoxinano oluphezulu.

Ukukhetha i-catalyst ngokufanelekileyo kubonelela ngeenzuzo eziphambili zokucubungula kwimveliso ye-foam eqinileyo. Ulwakhiwo lweseli olufanayo luphucula iipropati zokukhusela ubushushu kunye namandla omzimba ngokubanzi. Nangona kunjalo, idosi engafanelekanga idala iingxaki ezahlukeneyo zokucubungula. Ukulayisha okugqithisileyo kukhawulezisa ukukhula kweseli ngokukhawuleza kakhulu, kuphazamisa isakhiwo se-molecular kwaye kudala uxinano olubuthathaka lwe-core. Esi siphumo se-catalytic sibangela isiphumo sokufudumala sendawo kunye neengxaki zesakhiwo kwiibhloko ezinkulu ze-foam. Amaqela e-polyurethane formulation alungisa amanqanaba okulayisha ngononophelo ukuze agcine iiprofayili ezifanelekileyo zokulungisa.

Iinkcukacha zoKhuseleko, ukuPhathwa, kunye nokuPakisha

Abaqhubi bezityalo kufuneka basebenzise imiqathango engqongqo yokusingqongileyo nokhuseleko ngexesha lokucubungula iikhemikhali ezisebenzayo. I-MOFAN TMEDA ibonisa iimpawu zokusebenza ezikhethekileyo ezifuna imigaqo yokuthintela. Abaqhubi kufuneka bajonge ukufuma kwendalo kunye nobushushu kwendalo ngaphakathi kwiindawo zokugcina. Ulawulo olufanelekileyo lwendalo lukhusela ubunyulu be-amine esebenzayo ekuwohlokeni komswakama ongqongileyo.

Ukhuseleko olusebenzayo olucokisekileyo luthintela ukwenzakala emsebenzini kufutshane nezikhongozeli zolwelo ezivulekileyo. Ukuchitheka kolwelo kudala iingozi ezinkulu zokhuseleko kufutshane nemithombo yobushushu obuphezulu okanye izixhobo zombane. Amaqela ezityalo kufuneka agcine izikhongozeli ezivaliweyo kwiindawo ezipholileyo, ezomileyo nezinomoya. Ulwakhiwo lwezikhongozeli ezigciniweyo kufuneka luhlale kude nobushushu, ukufuma, i-static, kunye ne-asidi enamandla. Iindlela eziqhelekileyo zokubonelela ngeenkonzo zorhwebo ziquka iidrama zentsimbi eziyi-160 kg okanye ukupakisha okwenziwe ngokwezifiso okulungiselelwe ngokweemfuno ezithile zabathengi kwizicelo zoshishino.

MOFAN TMEDAisebenza njengesincedisi esilinganayo se-tertiary amine kwiinkqubo ze-polyurethane foam eziguquguqukayo. Iipropati zayo zeekhemikhali zikhuthaza uphuhliso lwesikhumba esithambileyo kunye nokusebenza kakuhle kolwelo kuzo zonke izicelo ezahlukeneyo zokuvelisa. Abaqhubi bezityalo kufuneka bagcine iinkqubo zokhuseleko ezingqongqo ngenxa yeprofayili yayo yokutsha yeKlasi 3. Iinkqubo zokuphatha ezifanelekileyo kunye nomlinganiselo ochanekileyo wokulayisha i-catalyst zikhusela uzinzo lwe-foam ngexesha lokuqhuba kwemveliso esebenzayo. Iinjineli zeekhemikhali zifumana iingenelo ezahlukeneyo zokusebenza ngokusebenzisa i-MOFAN TMEDA kwiindlela zokwenza ngokwezifiso. Le catalyst yobumsulwa obuphezulu inika ulawulo oluthembekileyo lwe-kinetic ngexesha leempendulo ezinzima zokuphilisa. Ii-formulators zifumana ukusebenza okuphezulu ngokuhlanganisa esi sithako kunye ne-MOFAN 33LV kwimigca yemveliso ye-polyurethane foam ephezulu.

FAQ