Menene Mai Kara kuzari na Karfe?
A ƙarfe mai kara kuzariwani sinadari ne da ke ɗauke da ƙwayoyin ƙarfe waɗanda ke sauƙaƙa halayen sinadarai ba tare da an cinye su ba a cikin aikin. A cikin samar da polyurethane, masu haɓaka ƙarfe suna hanzarta manyan halayen kamar samar da urethane (polyol-isocyanate reaction) da urea (water-isocyanate reaction). Masu haɓaka ƙarfe suna inganta inganci, suna rage lokacin samarwa, kuma suna tabbatar da halayen jiki da sinadarai da ake so na kumfa polyurethane.
Rarrabuwar Masu Ƙarfe
Ana rarraba abubuwan kara kuzari na ƙarfe gabaɗaya bisa ga sinadaran da ke cikinsu, aikinsu, da takamaiman nau'in ƙarfe. Ga manyan rarrabuwa:
1. Masu ƙara kuzari na tushen Tin
Misali: MXC-T12(DBTDL)Dibutyltin yana dilaurate, Tin octoate.
Aikace-aikace: Ana amfani da shi sosai a cikin kumfa polyurethane, shafa, manne, da kuma mannewa.
Kadarorin: Babban aikin catalytic don amsawar polyol-isocyanate. Sau da yawa ana danganta shi da damuwa game da muhalli da guba.
2. Masu Katalysts Masu Tushen Bismuth
Misali: MXC-B20 (mai kara kuzari na bismuth carboxylate).
Aikace-aikace: Madadin abubuwan kara kuzari da aka yi da tin a cikin kumfa mai tauri da sassauƙa.
Kadarorin: Ba ya da guba kuma yana da illa ga muhalli. Yana da tasiri a aikace-aikace da ke buƙatar ƙarancin wari da ƙarancin hayaki. Yana haɓaka kyakkyawan warkarwa na baya tare da jinkirin taruwar danko.
3. Masu Ƙarfafawa Masu Tushen Zinc
Misali: Sinadarin neodecanoate.
Aikace-aikace: Kumfa mai sassauƙa, elastomers, da kuma shafa.
Kadarorin: Ƙarancin farashi da kuma ƙarancin aikin catalytic. Ana amfani da shi sosai a cikin tsari inda ake buƙatar babban zaɓi.
4. Masu ƙara kuzari na tushen titanium
Misali: Titanium alkoxids.
Aikace-aikace: Rufi, manne, da manne.
Kadarorin: Ƙarfin aiki mai ƙarfi na catalytic don takamaiman halayen. Ba a cika samunsa a cikin kumfa polyurethane ba saboda tsada mai yawa.
5. Bismuth-Tin ko Catalysts na ƙarfe iri-iri
Misali: Haɗuwar bismuth da tin catalysts.
Aikace-aikace: Ana amfani da shi don daidaita aiki da farashi yayin rage guba.
Kadarorin: Tasirin haɗin gwiwa don haɓaka takamaiman bayanan amsawa.
6. Sauran Masu Ƙarfe
Misalai: Aluminum, cobalt, manganese, ko abubuwan kara kuzari da aka yi da ƙarfe.
Aikace-aikace: Aikace-aikace na musamman a cikin shafi ko elastomers.
Kadarorin: Samar da fa'idodi na musamman kamar kwanciyar hankali mai zafi ko zaɓin amsawa na musamman.
MXC-B20: Bismuth Carboxylate Catalyst a matsayin Madadin Tin
MXC-B20 shinemai kara kuzari na bismuth metal carboxylateAn tsara shi azaman madadin abubuwan kara kuzari na gargajiya waɗanda aka yi da tin. Ana amfani da shi a cikin kumfa polyurethane don haɓaka:
- Gina Danko Mai Jinkiri
yana da kyakkyawan iko a lokacin farkon matakan samuwar kumfa. - Ingantaccen Maganin Gyaran Baya: Yana tabbatar da ƙarfi da ƙa'idodin ƙarshe ba tare da yin illa ga daidaiton sarrafawa ba.
- Amincin muhalli: Ba ya dauke da sinadarin mercury, gubar, da kuma sinadarai masu kara kuzari, wanda hakan ya dace da ka'idojin muhalli masu tsauri.
- Sauƙin amfaniYana aiki da polyols masu tauri da taushi, wanda ke ba da damar amfani da shi a cikin kumfa mai tauri, kumfa mai yawan yawa, da tsarin microporous.
Fa'idodin Bismuth Catalysts akan Tin Catalysts
Rage guba da kuma rage tasirin muhalli. Rage wari da hayaki a cikin samfurin ƙarshe. Mafi kyawun kwanciyar hankali a cikin tsarin ruwa.
A ƙarshe, abubuwan ƙarfafa ƙarfe kamar MXC-B20 suna taka muhimmiyar rawa wajen haɓaka samar da polyurethane mai dorewa da inganci ta hanyar samar da madadin tsarin gargajiya na tushen tin.
Lokacin Saƙo: Nuwamba-26-2024