Sebakeng se ntseng se fetoha sa mahlale a lintho tse bonahalang, polyurethane e ntse e le lejoe la motheo ka lebaka la lits'ebetso tsa eona tse feto-fetohang ho tloha ho foam e bonolo ho isa ho meaho e thata le masimo a CASE (Coatings, Adhesives, Sealants, le Elastomers). Jwalo ka mofani ya ka sehloohong wali-catalyst tsa polyurethane, re motlotlo ho hlahisa Catalyst MB20, e leng catalyst e thehiloeng ho bismuth ea tlhaho e etselitsoeng ho ntlafatsa ts'ebetso le katleho ea litsamaiso tsa polyurethane.
Sehokelo sa MB20Sebopeho le Mokhoa
Sehokelo sa MB20 ke sehokelo sa bismuth sa tlhaho se hlahelletseng ka lebaka la bokhoni ba sona bo ikhethang ba ho nolofatsa liketso tsa polyurethane ka katleho. Bismuth, e le karolo, e fana ka mokhoa o motle oa ho sebelisa lihokelo tsa tšepe e boima tsa setso ka lebaka la chefo ea eona e tlase le tšusumetso ea tikoloho. Mosebetsi oa ho hohela oa MB20 o bakoa haholo-holo ke litsi tsa bismuth tse sebelisanang le lihlopha tsa isocyanate ka har'a metsoako ea polyurethane, e potlakisang karabelo ka li-polyol ho theha meaho ea polymer e lakatsehang.
Litšebeliso ho Foam ea Polyurethane e Bonolo le e Thata
Lifomo tse bonolo tsa polyurethane li fumaneha hohle lits'ebetsong tse kang ho roka thepa ea ka tlung, litulo tsa likoloi le libethe. Ho tenyetseha le ho mamella ha lifomo tsena ke tsa bohlokoa, 'me MB20 e bapala karolo ea bohlokoa ho ntlafatseng litšobotsi tsena. Ha e sebelisoa e le catalyst, MB20 e ntlafatsa sekhahla sa karabelo, e netefatsa sebopeho se tsitsitseng sa sele le bongata bo lekanang ba fomo. Sena se fella ka lihlahisoa tse sa fihlelleng feela empa li feta maemo a indasteri bakeng sa boiketlo le ho tšoarella.
Ka lehlakoreng le leng, lifomo tse thata tsa polyurethane lia hlokahala kahong bakeng sa merero ea ho kenya mocheso, ka lebaka la thepa ea tsona e ntle ea ho kenya mocheso. Bokhoni ba ho kenya mocheso ba MB20 bo netefatsa hore lifomo tsena li fihlela ho tiea le matla a hlokahalang kapele, e leng sa bohlokoa bakeng sa lits'ebetso moo botsitso ba boholo le khanyetso ea mocheso li leng bohlokoa. Ho fola ka potlako ho nolofalitsoeng ke MB20 ho boetse ho khutsufatsa potoloho ea tlhahiso, ho ntlafatsa bokhoni ba tlhahiso.
Ho Ntlafatsa Litšebeliso tsa Nyeoe
Ho tenyetseha ha Catalyst MB20 ho atoloha karolong ea CASE, moo e ntlafatsang haholo ts'ebetso ea liphahlo, likhomaretsi, li-sealant le li-elastomer. Liphahlong, MB20 e thusa ho fihlela qetello e boreleli, e ts'oanang ka ho tšoarella ho matla le ho hanyetsa mabaka a tikoloho. Bakeng sa likhomaretsi le li-sealant, catalyst e netefatsa ho fola kapele le thepa e matla ea ho kopanya, e leng ea bohlokoa bakeng sa lits'ebetso tsa indasteri le tsa bareki. Li-elastomer li rua molemo ho elasticity e ntlafetseng le matla a mechini a fanoang ke catalysis e sebetsang ea MB20.
Tšebelisano-'moho le Li-Amine tsa Thuto e Phahameng
E 'ngoe ea litšobotsi tse ikhethang tsa MB20 ke bokhoni ba eona ba ho sebetsa ka tsela e lumellanang le li-amine tse phahameng. Li-amine tse phahameng ke li-co-catalyst tse tsebahalang haholo k'hemistring ea polyurethane, haholo-holo li ntlafatsa tlhaselo ea nucleophilic lihlopheng tsa isocyanate. Ha li sebelisoa hammoho le MB20, li-amine tse phahameng li potlakisa ts'ebetso ea polyurethane le ho folisa. Tšusumetso ena ea synergistic ha e potlakise feela kinetics ea karabelo empa hape e ntlafatsa thepa eohle ea sehlahisoa sa ho qetela, ebang ke foam, coating, sekhomaretsi, kapa sealant.
Qetello
Motlakase MB20 o emela kgatelopele e kgolo ho motlakase wa polyurethane, o kopanya melemo ya k'hemistri ya bismuth ya tlhaho le ho tenyetseha ho hlokahalang bakeng sa ditshebediso tse fapaneng tsa polyurethane. Bokgoni ba yona ba ho sebetsa mmoho le di-amine tsa tertiary bo netefatsa hore bahlahisi ba ka fihlella dinako tse potlakileng tsa ho fola le tshebetso e ntle ya dihlahiswa. Ha diindasteri di ntse di tswela pele ho batla ditharollo tse tsitsitseng le tse sebetsang hantle, MB20 e hlahella e le motlakase o fihlelang ditlhoko tsena, o kganna boqapi mmarakeng wa polyurethane.
Nako ea poso: Phuptjane-25-2024