Li-catalyst tsa polyurethane li bapala karolo ea bohlokoa tlhahisong ea li-polyurethane, li sebetsa e le matla a susumetsang liketso tsa lik'hemik'hale tse etsang thepa ena e feto-fetohang. Har'a li-catalyst tse fapaneng tse fumanehang, MXC-T120 e ikhetha e le khetho e matla le e sebetsang bakeng sa mefuta e fapaneng ea lits'ebetso tsa polyurethane, ho tloha ho fafatsa foam ho ea ho polyurethane e thata le lihlahisoa tsa ho bopa tse tenyetsehang tse nang le elasticity e phahameng. Ho utloisisa mosebetsi oa li-catalyst tsa polyurethane le melemo eaMXC-T120e bohlokoa bakeng sa ho ntlafatsa lits'ebetso tsa tlhahiso le ho fihlella ts'ebetso e phahameng ea thepa.
Ka kakaretso, catalyst ke ntho e eketsang sekhahla sa karabelo ea lik'hemik'hale ntle le ho sebelisoa ts'ebetsong. Moelelong oa tlhahiso ea polyurethane, li-catalyst li bohlokoa bakeng sa ho potlakisa karabelo pakeng tsa li-polyol le li-isocyanate, likarolo tsa mantlha tsa polyurethane. Karabelo ena, e tsejoang e le gelation, e theha matrix ea polymer ea polyurethane. MXC-T120, catalyst e thehiloeng ho dibutyltin, e sebetsa hantle haholo ho nolofatseng karabelo ena, e fana ka ts'ebetso e phahameng ea catalytic le botsitso bo ntlafalitsoeng ba hydrolytic.
E 'ngoe ea mesebetsi ea mantlha ea li-catalyst tsa polyurethane tse kang MXC-T120 ke ho laola nako ea ho lahla li-gelling. Ka ho potlakisa ts'ebetso ea ho lahla li-gelling, li-catalyst li thusa ho theha marang-rang a tsitsitseng a polymer kapele le ka katleho. Sena se bohlokoa haholo lits'ebetsong tse kang foam e fafatsang, moo ho fola ka potlako ho leng bohlokoa bakeng sa ho boloka sebopeho le botsitso ba sebopeho. Ho feta moo, MXC-T120'Ts'ebetso e matla ea ho kenya tšebetsong e netefatsa ts'ebetso e tsitsitseng le e tšepahalang ho pholletsa le mefuta e fapaneng ea polyurethane.
Ntle le ho laola nako ea ho etsa gelling, li-catalyst li boetse li bapala karolo ea bohlokoa ho leka-lekanyeng likarabelo tsa lehlakore, ho kenyeletsoa le karabelo ea metsi ka li-isocyanate ho etsa khase ea carbon dioxide (CO2). Karabelo ena ke ea bohlokoa ts'ebetsong ea ho fofonela, e fanang ka litšobotsi tse lakatsehang joalo ka ho kenya mocheso le ho sireletsa mafomo a polyurethane. Leha ho le joalo, ho thehoa ha khase ho feteletseng ho ka lebisa likoli le boleng bo fokolang ba thepa. MXC-T120 e ipabola ho laoleng likarabelo tsena tsa lehlakore, e netefatsa tekano e ntle lipakeng tsa ho thehoa ha polymer le tlhahiso ea khase, e leng se fellang ka mafomo a boleng bo holimo a nang le sebopeho se tšoanang sa sele.
Ha ho bapisoa le di-catalyst tsa amine, tse tswang ho ammonia (NH3) mme di fapana ka tshebetso ho latela sebopeho sa tsona le motheo wa tsona, MXC-T120 e fana ka tshebetso e phahameng mabapi le botsitso ba hydrolytic. Di-catalyst tsa amine, haholo-holo di-amine tse tharo, di sebediswa hangata tlhahisong ya foam ka lebaka la bokgoni ba tsona ba ho kgothaletsa ho thehwa ha CO2. Leha ho le jwalo, di ka boela tsa hlahisa ho feto-fetoha le kutloelo-bohloko mongobong, e leng se ka amang botsitso ba thepa ba nako e telele. MXC-T120, ka sebopeho sa yona sa dibutyltin, e fana ka kganyetso e matla ho hydrolysis, e netefatsang dihlahiswa tsa polyurethane tse tshwarellang le tse tsitsitseng esita le maemong a thata a tikoloho.
Qetellong,poliethane sethothetsiMXC-T120 ke sesebelisoa se matla le se feto-fetohang se ntlafatsang haholo bokgoni le boleng ba tlhahiso ya polyurethane. Tshebetso ya yona e phahameng ya ho kenya tshebetsong, botsitso bo botle ba hydrolytic, le bokgoni ba ho leka-lekanya dikarabelo tse ka thoko di etsa hore e be kgetho e ntle bakeng sa ditshebediso tse fapaneng, ho tloha ho fafatsa foam ho ya ho dihlahiswa tse thata le tse tenyetsehang tsa ho bopa. Ka ho sebedisa melemo ya MXC-T120, bahlahisi ba ka fihlella thepa e ntle ya polyurethane ka tshebetso e ntlafetseng le ho tshwarella.
Nako ea poso: Phato-05-2024