Tlhaloso e Khutšoanyane: Hlahloba mesebetsi le melemo ea bohlokoa ea li-catalyst tsa amine tlhahisong ea polyurethane. Ithute kamoo litharollo tsa rona tse tsoetseng pele tsa li-catalyst li ntlafatsang ts'ebetso ea foam le ho fihlela litlhoko tsa indasteri.
Foam ea polyurethane (PU) ke thepa ea bohlokoa e sebelisoang lits'ebetsong tse fapaneng ho kenyeletsoa le ho kenya mocheso, likarolo tsa likoloi, kaho le thepa ea ka tlung. Motheo oa tlhahiso ea polyurethane o karolong ea li-catalyst, haholo-holo li-catalyst tsa amine, tse bohlokoa bakeng sa ho laola lebelo, katleho le boleng ba lits'ebetso tsa ho fofonela le ho folisa.
Jwalo ka moetsi ya ka sehloohong wa di-catalyst tsa polyurethane, re tsepamisitse maikutlo ho faneng ka di-catalyst tsa amine tse sebetsang hantle bakeng sa mefuta e fapaneng ya ditsamaiso tsa foam - ditshebediso tse thata, tse tenyetsehang, tse thata hanyane le tse fafaditsweng tsa foam. Sengoloa sena se tla hlahloba dibopeho le mesebetsi ya di-catalyst tsa amine le kamoo di kgothaletsang tlhahiso e sebetsang hantle ya polyurethane.
Ke engli-catalyst tsa amine?
Li-catalyst tsa amine ke metsoako ea tlhaho e nang le liathomo tsa naetrojene. Li sebelisoa haholo-holo ho khothalletsa karabelo ea lik'hemik'hale lipakeng tsa li-polyol le li-isocyanate ho theha li-polyurethane. Litsamaisong tsa foam, li-catalyst tsa amine li laola liketso tse peli tsa bohlokoa:
1. Karabelo ea moholi – karabelo pakeng tsa isocyanate le metsi ho hlahisa khase ea carbon dioxide (CO₂) ho etsa sebopeho sa moholi.
2. Karabelo ea Gelation - Karabelo pakeng tsa isocyanate le polyol e fa foam matla a mechini.
Ka ho leka-lekanya dikarabelo tsena tse pedi, di-catalyst tsa amine di netefatsa hore foam e atoloha ka nepo, e fola ka ho lekana mme e fihlela ditlhoko tsa tshebetso.
Likarolo tsa bohlokoa tsa li-catalyst tsa amine
- Ho arabela ka potlako haholo: Li-catalyst tsa amine li ka potlakisa sekhahla sa karabelo haholo, tsa khutsufatsa nako ea ts'ebetso le ho ntlafatsa katleho ea tlhahiso.
- Khetho e ikhethileng: Li-catalyst tse fapaneng tsa amine li ka etsoa ho khothaletsa karabelo ea foam kapa karabelo ea gelation ho latela ts'ebeliso ea foam.
- Mosi o fokolang le monko o tlase: Li-catalyst tsa sejoale-joale tsa amine li entsoe ka hloko ho fokotsa metsoako e feto-fetohang ea lintho tse phelang (VOC) le monko o monate oa amine ho netefatsa hore li latela melaoana ea tikoloho le polokeho.
- Ho tsamaellana ho hotle haholo: Li tsamaellana le mefuta e fapaneng ea litsamaiso tsa isocyanate le polyol, ho kenyeletsoa le li-agent tsa HFO tsa setso le tse mosa tikolohong.
- Mefuta e mengata ea lits'ebetso: E loketse foam e tenyetsehang, foam e tiileng, foam e matla ea ho mamella (HR), foam ea letlalo e kopaneng, foam ea microcellular le foam ea polyurethane e fafalitsoeng (SPF).
Karolo ea Li-Catalyst tsa Amine ho Li-Foam tsa Polyurethane
1. Liprofaele tsa ho Laola Karabelo
Ts'ebetso ea ho ntša foam e tlameha ho beoa ka nako e nepahetseng ho fihlela bolelele bo botle ba ho phahama, sebopeho se ts'oanang sa sele, le thepa ea ho qetela e phahameng. Li-catalyst tsa amine li thusa ho laola liprofaele tsa ho qala, ho phahama le ho fola ho amohela lits'ebetso tse fapaneng tsa tlhahiso (mohlala, foam e thibelang, foam e bopiloeng, foam e fafatsang).
2. Ho Ntlafatsa Boleng ba Foam
Sebopeho se tšoanang sa sele, qetello e boreleli ea bokaholimo, le ho tiea ho tsitsitseng ke matšoao a foam ea boleng bo holimo. Li-catalyst tsa amine li finyella sena ka ho netefatsa tlhahiso e tšoanang ea khase le ho hokahana ho leka-lekaneng.
3. Ho Ntlafatsa Tshebetso ya Matla
Litšebelisong tsa ho thibela mocheso tse kang tsa kaho le tsa sehatsetsing, li-catalyst tsa amine li thusa ho hlahisa li-foam tse thata tse nang le sebopeho se setle sa sele le conductivity e tlase ea mocheso, e leng se ntlafatsang ts'ebeliso e ntle ea matla.
4. Ho iketsetsa ho latela Litlhoko tsa ho rala
Hore na o sebetsa ka litsamaiso tse nang le metsi a mangata, foam tse nang le bongata bo tlase, kapa li-elastomer tse khethehileng, o ka khetha catalyst e itseng ea amine ho fihlela lipheo tsa hau tsa ts'ebetso le ts'ebetso.
Ke Hobane'ng ha U Lokela ho Khetha Litharollo tsa Rona tsa Amine Catalyst?
Khamphani ea rona e fana ka mefuta e felletseng ea li-catalyst tsa amine tse nang le litšobotsi tsa ts'ebetso tse ikhethileng, litšobotsi tsa ho ntša mosi, le ho lumellana le litsamaiso tsa foam tsa moloko o latelang. Lihlahisoa tsa rona tse hlahelletseng li kenyelletsa:
- MXC-37 (DMAEE)– bakeng sa lifomo tse tenyetsehang tse thehiloeng ho ester le metsoako e nang le metsi a mangata.
- MXC-A1 (BDMAEE) – sesebelisoa se sebetsang haholo sa ho foka bakeng sa lifomo tse matla tsa ho mamella le litsamaiso tsa RIM.
- MXC-70 – sesebelisoa sa ho fofonela monko o fokolang se etselitsoeng litsamaiso tse fokeloang ke metsi ho ntlafatsa phekolo ea bokaholimo.
Re ikemiselitse ho thusa bahlahisi ba polyurethane ho ntlafatsa ts'ebetso ea lihlahisoa, ho fokotsa mosi o kotsi, le ho fihlela litlhoko tse fetohang tsa 'maraka.
Sebelisana le Rona
Haeba o batla mofani ea tšepahalang oa li-catalyst tsa amine bakeng sa tlhahiso ea hau ea polyurethane, re u mema hore u hlahlobe mofuta oa rona oa lihlahisoa le bokhoni ba tekheniki. Sehlopha sa rona sa R&D se ikemiselitse ho fana ka litharollo le tšehetso e ikhethileng bakeng sa litlhoko tsa hau tsa tlhahiso.
Ikopanye le rona kajeno ho kopa sampole kapa ho buisana ka hore na li-catalyst tsa rona li ka ntlafatsa katleho ea tlhahiso ea foam ea hau joang.
Nako ea poso: Mmesa-14-2025