Chii chinonzi Metal Catalyst?
A chinowedzera simba resimbichinhu chine maatomu esimbi chinoita kuti makemikari ashande pasina kushandiswa. Mukugadzirwa kwepolyurethane, macatalysts esimbi anokurumidza kuita zvinhu zvakakosha zvakaita sekuumbwa kweurethane (polyol-isocyanate reaction) uye urea (water-isocyanate reaction). Macatalysts esimbi anovandudza kushanda zvakanaka, anoderedza nguva yekugadzira, uye anovimbisa hunhu hwemuviri nehwemakemikari hunodiwa hwepolyurethane furo.
Kupatsanurwa kweMetal Catalysts
Zvinhu zvinokonzeresa simbi zvinopatsanurwa zvakanyanya zvichienderana nemakemikari azvo, mashandiro azvo, uye rudzi rwesimbi. Heano mapoka makuru:
1. Zvinokonzera Zvinhu Zvine Tin
Muenzaniso: MXC-T12(DBTDL)Dibutyltin dilaurate, Tin octoate.
Mashandisirwo: Inoshandiswa zvakanyanya mu polyurethane furo, coatings, glues, uye sealants.
Zvivakwa: Inoshanda zvakanyanya pakukonzera kupararira kwepolyol-isocyanate reaction. Inowanzobatanidzwa nematambudziko ezvakatipoteredza uye chepfu.
2. Zvinokonzera Zvinoshandiswa neBismuth
Muenzaniso: MXC-B20 (Bismuth carboxylate catalyst).
Mashandisirwo: Imwe nzira yekubvisa ma catalysts anobva mu tin mu furo dzakasimba uye dzinochinjika.
Zvivakwa: Haina chepfu uye haikuvadzi nharaunda. Inoshanda zvakanaka pakushandiswa kwayo inoda kunhuhwirira kushoma uye kuburitsa mweya kwakaderera. Inobatsira pakurapa kwemashure kwakanaka uye kunonoka kuunganidzwa kwe viscosity.
3. Zvinokonzera Zinc
Muenzaniso: Zinc neodecanoate.
Mashandisirwo: Mafuro anochinjika, ma elastomer, uye ma coatings.
Zvivakwa: Inodhura zvishoma uye inoshanda zvishoma pakukonzera matambudziko. Inowanzoshandiswa mumafomura apo panodiwa sarudzo yepamusoro.
4. Zvinokonzera Titanium
Muenzaniso: Titanium alkoxides.
Mashandisirwo: Mapendi, zvinonamira, uye zvinonamira.
Zvivakwa: Basa rakasimba rekugadzirisa mafambiro chaiwo. Hariwanzoitiki mu polyurethane foam nekuda kwemutengo wakakwira.
5. Zvishandiso zveBismuth-Tin kana Mixed-Metal Catalysts
Muenzaniso: Musanganiswa webismuth netin catalysts.
Mashandisirwo: Inoshandiswa kuyera mashandiro uye mutengo uku ichideredza chepfu.
Zvivakwa: Mhedzisiro yekubatana kuti iwedzere maitiro chaiwo ekuita.
6. Zvimwe Zvinokonzera Simbi
Mienzaniso: Aruminiyamu, cobalt, manganese, kana zvinhu zvinokonzeresa simbi.
Mashandisirwo: Kushandiswa kwakakosha kwezvipfeko kana ma elastomers.
Zvivakwa: Ipa zvakanakira zvakasiyana zvakaita sekugadzikana pakupisa kwakanyanya kana kusarudza kwakanangana nemhinduro.
MXC-B20: Bismuth Carboxylate Catalyst seChinotsiva Tin-Based
MXC-B20 imhando yebismuth metal carboxylate catalystYakagadzirwa senzira isingakuvadzi nharaunda pane zvinhu zvechinyakare zvetin-based catalysts. Inoshandiswa mu polyurethane foams kukurudzira:
- Kunonoka Kuunganidzwa kweViscosity
inopa kutonga kuri nani panguva yekutanga kwekuumbwa kwefuro. - Kurapa Kwemusana Kwakawedzerwa:Inovimbisa zvivakwa zvakasimba zvekupedzisira pasina kukanganisa kugadzikana kwekugadzirisa.
- Kusasvibisa Zvisikwa:Haina mercury, lead, uye tin compounds, zvichienderana nemitemo yakaoma yezvakatipoteredza.
- Kuchinja-chinja:Inoenderana nepolyol dzakaoma nedzakapfava, zvichiita kuti ishandiswe mufoam dzakasimba, foam dzine density yakakura, uye masisitimu ane porous microporous.
Mabhenefiti eBismuth Catalysts Pamusoro peTin Catalysts
Kuderedza chepfu uye kuderedza kukanganisa kwezvakatipoteredza. Kuderedza hwema uye kusvibiswa kwemhepo muzvigadzirwa zvekupedzisira. Kugadzikana kwakanyanya mukugadzirwa kwemvura.
Mukupedzisa, zvinhu zvinokonzeresa simbi zvakaita seMXC-B20 zvine basa rakakosha mukusimudzira kugadzirwa kwepolyurethane kunogara kwenguva refu uye kunoshanda zvakanaka nekupa dzimwe nzira dzekugadzira tin-based systems dzechinyakare.
Nguva yekutumira: Mbudzi-26-2024