Kumvetsetsa Foam ya Polyurethane Yotsekedwa ndi Ntchito ya Polyurethane Catalysts mu Ntchito Zake

Kodi Foam ya Polyurethane Yotsekedwa ndi Chiyani?

Thovu la polyurethane lotsekedwa ndi mtundu wa zinthu zotetezera kutentha zomwe zimagwira ntchito bwino kwambiri, zomwe zimasunga mphamvu komanso zimateteza chinyezi kwambiri, kotero zimagwiritsidwa ntchito kwambiri m'mafakitale osiyanasiyana. Thovu ili limapangidwa ndi mabowo odzaza ndi mpweya woteteza kutentha (wotchedwa blowing agents) womwe umathandiza kusunga kutentha mkati mwa mabowo. Kapangidwe ka selo lotsekedwa kamathandizira kutentha ndipo ndi chisankho chabwino kwambiri pakugwiritsa ntchito zotetezera kutentha zomwe zimasunga mphamvu.

Chimodzi mwa ubwino waukulu wa thovu la polyurethane lotsekedwa ndi kuchuluka kwake kwakukulu, komwe kumapatsa mphamvu yolimbana ndi madzi. Kuchuluka kumeneku kumapangitsa kuti likhale chotchinga cha chinyezi chogwira ntchito, chomwe ndi chofunikira kwambiri m'malo onyowa monga ma attics, malo oyenda pansi, ndi zipinda zapansi. Chifukwa thovu la closed-cell limapanga chisindikizo chopanda mpweya, limachepetsa chiopsezo cha kulowa kwa chinyezi, motero limachepetsa kukula kwa nkhungu, zomwe zimapangitsa kuti mpweya wabwino m'nyumba ukhale wabwino komanso zimathandiza kuti malo okhala azikhala abwino.

Malo Ogwiritsira Ntchito Zinthu Zothandizira Polyurethane mu Foam Yotsekedwa

Ma catalyst a polyurethane amagwira ntchito yofunika kwambiri popanga thovu la maselo otsekedwa mwa kuwongolera momwe mankhwala amagwirira ntchito zomwe zimapangitsa kuti thovu likhale lapadera. Ma catalyst monga MXC-C15 ndi MXC-37 amathandizira kukwaniritsa magwiridwe antchito enaake omwe amalola thovu la maselo otsekedwa kugwiritsidwa ntchito popanga ndi kutchinjiriza.

MXC-C15(3,3′ -iminobis (N, n-dimethylpropylamine), nambala ya CAS 6711-48-4, ndi chothandizira cha amine chopanda fungo loipa, chomwe chingathe kusankha pang'ono za urea (isocyanate-water). Chothandizirachi chimathandizira kukhazikika bwino m'machitidwe olimba a polyurethane, zomwe zimapangitsa kuti chikhale chosankha chachikulu pakugwiritsa ntchito zomwe zimafuna mphamvu zokhazikika komanso zopitilira patsogolo zokhazikika. Makhalidwe ake ndi opindulitsa kugwiritsidwa ntchito mu thovu lotsekedwa la cell kuti liteteze denga, makoma ndi madera ena komwe kulimba ndi kukana chinyezi ndikofunikira.

MXC-37(2-(2-(dimethylamino)ethoxy)ethanol, CAS No. 1704-62-7), yomwe imadziwikanso kuti DMAEE, ndi chothandizira cha amine chogwira ntchito mosiyanasiyana, chotulutsa mpweya wochepa chomwe chimagwira ntchito zambiri zotulutsa thovu. Chifukwa cha kugwira ntchito kwake popanga thovu lokhala ndi madzi ambiri, MXC-37 ndi yoyenera kwambiri popanga thovu lothira madzi lochepa. Chothandizira ichi chimachepetsa fungo la amine lomwe limapezeka mu thovu ndipo chimawonjezera kulimba kwa kapangidwe ka thovu, zomwe zimapangitsa kuti likhale lothandiza pakugwiritsa ntchito thovu lochepa. Kugwiritsa ntchito kwake kwakukulu kumaphatikizapo thovu lofewa, ma elastomers, ndi thovu lolimba poyikamo, zomwe zimathandiza kukwaniritsa kukhazikika ndi mphamvu pazinthu zomwe zimafuna kukulitsa ndi kukhazikika kolondola.

Ubwino wa Thovu Lotsekedwa ndi Zothandizira za Polyurethane

Thovu la polyurethane lotsekedwa lili ndi mphamvu yabwino yolimbana ndi kutentha ndi chinyezi, ndipo zinthu monga MXC-C15 ndi MXC-37 zimathandiza kupanga bwino komanso kugwira ntchito bwino. Zonsezi pamodzi zimapangitsa thovu la closed-cell kukhala chisankho m'malo omwe kutentha kumafunika kodalirika komanso kulimba kwa nthawi yayitali.