Chiyambi cha Kugwiritsa Ntchito Polyurethane Catalyst mu Spray Foam Insulation

Kuteteza thovu lopopera ndi chinthu choteteza chomwe chimagwiritsidwa ntchito m'njira zosiyanasiyana komanso chogwira ntchito bwino kwambiri chopangidwa kuchokera ku mankhwala omwe amachokera ku zigawo ziwiri zazikulu (polyol resin ndi isocyanate). Zikaphatikizidwa, zinthu ziwirizi zimagwira ntchito popanga thovu lalikulu la polyurethane lomwe limatseka bwino ndikuteteza malo. Kufunika kwakukulu kwa kutetezera kwamphamvu kwa ntchito zapakhomo, zamalonda ndi zamafakitale kwapangitsa kuti kugwiritsa ntchito kutetezera thovu lopopera ndi kutetezera kwapamwamba, kukana chinyezi komanso kuthandizira kapangidwe kake kukhale kwakukulu.

Momwe Kupopera Foam Kumapangira

Kupanga kwa thovu lopopera kumadalira kwambiri kuyanjana pakati pa ma polyol ndi isocyanates, omwe amakula kuti adzaze malowo ndikulimba kukhala thovu lopopera kupopera. Komabe, njirayi imafuna kuwongolera kolondola kuti zitsimikizire kuchuluka kwa thovu, kapangidwe kake, ndi kufanana kwake koyenera. Apa,chothandizira cha polyurethaneimagwira ntchito yofunika kwambiri poyendetsa ndikuwongolera zomwe zimachitika.

Udindo wa Zothandizira pa Kupanga Thovu la Polyurethane

Ma Catalyst ndi ofunikira popanga ma polyurethane chifukwa amawonjezera kwambiri kuchuluka kwa reaction ndikuwongolera nthawi ya gel, zomwe ndizofunikira kwambiri kuti thovu likule bwino. Catalyst imathanso kuwongolera reaction yachiwiri, monga reaction yamadzi, yomwe imatulutsa mpweya wofunikira kuti thovu liyambe. Kulinganiza pakati pa reactions izi ndikofunikira popanga mapangidwe ofanana a thovu okhala ndi kapangidwe ka maselo ndi makhalidwe ofanana. Pakupanga polyurethane, ma catalyst nthawi zambiri amagawidwa m'magulu awiri:zinthu zoyambitsa aminendizoyambitsa za organometallic(monga organotin, bismuth, ndi zinc).

MXC-TMA ndi MXC-BDMA: Zothandizira Kuteteza Foam Yopopera

ZothandiziraMXC-TMAndiMXC-BDMAali ndi ubwino woonekeratu popanga kutchinjiriza thovu lopopera.MXC-TMANdi madzi opanda mtundu kapena achikasu owala omwe amalimbikitsa kuyeretsa kwa polyisocyanurate kuti apange curve yofanana komanso yolamulidwa. Chothandizirachi chimagwiritsidwa ntchito kwambiri mu thovu lolimba lomwe limafuna kusinthasintha kwabwino komanso kukhazikika nthawi zonse, ndipo ndi chisankho chabwino pakugwiritsa ntchito zotetezera zomwe zimafuna kukhazikika kwa kapangidwe kake.

Mbali inayi,MXC-BDMA(N, N-dimethylbenzylamine, CAS nambala 103-83-3) ndi chothandizira cha benzyldimethylamine chomwe chimagwiritsidwa ntchito kwambiri popaka thovu lolimba. Chimawonjezera kusinthasintha kwa thovu koyambirira, chimapanga mabowo ofanana a thovu ndikutsimikizira kuti chikugwirizana kwambiri ndi gawo lapansi. Izi zimapangitsa MXC-BDMA kukhala yoyenera pazofunikira zotetezera kutentha kwambiri popaka thovu lopopera, komwe kapangidwe ka thovu kokhazikika, kolimba komanso komatira ndikofunikira.

Mapeto

Ma catalyst a polyurethane monga MXC-TMA ndi MXC-BDMA ndi ofunikira kwambiri kuti zinthu zotetezera thovu lopopera zigwire bwino ntchito. Makhalidwe awo apadera amalola kuwongolera bwino kapangidwe ka thovu, kuonetsetsa kuti zinthu zotetezera zikugwira ntchito bwino m'njira zosiyanasiyana. Pamene kufunikira kwa njira zotetezera mphamvu zogwiritsira ntchito mphamvu zochepa kukupitirira kukula, ma catalyst apamwamba a polyurethane akupitilizabe kugwira ntchito yofunika kwambiri popereka chitetezo cha thovu lopopera chapamwamba komanso cholimba.