Chii chinonzi Mechanism of Action yeAmine Catalysts paPolyurethane?
Zvinokonzera amineZvikamu zvakakosha zvekugadzirwa kwepolyurethane uye zvinhu zvakakosha zvinokurumidzisa zvikuru kuita kwemaitiro pakati pepolyols neisocyanates (chinhu chikuru chekugadzira polyurethane foam), kudzora nekuenzanisa maitiro egel uye gasi kana foam reaction inoumba furo. Izvi zvinoita nekuderedza simba rekuita kuti pave nemakemikari, zvichikonzera kukura nekukurumidza uye kudzorwa kwefuro. Amine catalysts inoshanda zvakanyanya nekuti inobata basa rekuita, mapoka ekuita muchimiro chavo chemamorekuru anogona kusangana neisocyanates, uye amine catalysts inowanzoita pakati pe0.1% ne5.0% ye polyurethane formulations. Hunhu uhwu hwakasiyana hunovabvumira kubatana nepolyisocyanates, vachidzikamisa matrix yekupedzisira yepolyurethane uye vachiona kuti yakabatana ne substrate.
Maitiro ekugadzirisa amine catalyst mu polyurethane foam anonyanya kukurudzira maitiro maviri makuru: polyol-isocyanate reaction (kuumbwa kwecarbamate bonds) uye isocyanate-water reaction (kugadzirwa kwecarbon dioxide). Maitiro ekupedzisira aya anogadzira mabubbles, achigadzira chimiro chemasero chefuro. Kuburikidza neizvi zviviri, amine catalyst inogonesa maitiro akaenzana ekufuridza furo nekuporesa, ichiva nechokwadi chekuti furo rinokura zvakaenzana uku richisimba kuita chimiro chakagadzikana. Zvinokatyamadza zvakaita seMXC-70zvakare zvinopa mukana wekuti furo rikwire zvakanaka, zvichireva kuti rinowedzera zvishoma nezvishoma viscosity yefuro. Izvi zvinoita kuti pave nechimiro cheuchi chakarongwa uye chakafanana chinobatsira kuvandudza kugara kwenguva refu uye kugadzikana kwefuro.
Munda wekushandiswa kweAmine Catalysts
Zvishandiso zveAmine zvinoshandiswa mumhando dzakasiyana-siyana dzepolyurethane, kusanganisira furo rakapfava nerakaoma, elastomers, coatings, glues, uye sealants. Mukugadzira furo rakapfava, zvinobatsira kuwana kupfava uye kusimba kunodiwa, zvichiita kuti zvive zvakanaka kumacushion efenicha, magumbeze uye zvigaro zvemota. Pakushandisa furo rakapfava, senge ma insulation panels, midziyo yemagetsi, uye ma spray foam, ma amine catalysts anokurudzira high-density closed cell structures anowedzera heat insulation uye dimensional stability.
Zvishandiso zveAmine zvakaita seMXC-70 zvinonyanya kukodzera kushandiswa zviri nyore nekuda kwekuti hazvinhuhwiriri zvakanyanya uye hazviburitse mweya zvakanyanya. Mumidziyo yemumba, zvinowedzera kunamira kune substrates dzesimbi nepurasitiki, izvo zvakakosha pakudzivirira kupisa. Mumafuro espray nebhokisi, izvi zvinogonesa kuwedzera nekunamira kwefuro zvakanaka kune substrate uku zvichideredza kunhuhwirira kwasara uye kuburitsa mweya uye zvichisangana nezvinodiwa nenharaunda nemutemo.
Kazhinji, kushandiswa kwakasiyana-siyana uye kushanda zvakanaka kweamine catalysts kunoita kuti ive chinhu chakakosha mumaindasitiri anoda polyurethane insulation, buffering, uye bonding properties. Mingxu Chemical Company yave ichigadzira polyurethane catalysts kwemakore anopfuura makumi maviri, tine nzira yakanakisisa yekushanda uye timu yehunyanzvi yekugadzirisa nekugadzirisa zvigadzirwa zve catalyst zvemusika, vatengi vakawanda, tinogamuchira vatengi kuti vauye kuzobvunza.
Nguva yekutumira: Gumiguru-29-2024