Pentamethyldiethylenetriamine (pmdeta)

Ma methyl awiri a ethyleneamine atatu ndi chothandizira kwambiri cha polyurethane reaction.Imathandiza makamaka kutulutsa thovu, ndipo imagwiritsidwanso ntchito kulinganiza momwe thovu lonse limachitira ndi gel osakaniza.Amagwiritsidwa ntchito mu mitundu yonse ya polyurethane okhwima thovu, kuphatikizapo polyisocyanurate mbale okhwima thovu.Chifukwa cha mphamvu yake yotulutsa thovu, imatha kutulutsa thovu, motero imathandizira kupanga ndikuwonjezera kuchuluka kwa kupanga.Nthawi zambiri amagawana ndi DMCHA ndi zina zotero.Ma methyl awiri a ethyleneamine atatu amine amagwiritsidwa ntchito pawokha ngati chothandizira kupanga chithovu cha polyurethane, ndipo amathanso kugawana ndi zothandizira zina.0-2.0 magawo pa magawo 100 a polyol.
Kuphatikiza pakupanga chithovu cholimba, ma methyl awiri awiri ethyleneamine atatu angagwiritsidwenso ntchito popanga thovu lofewa la polyether polyurethane ndi thovu lowumba.Mwachitsanzo, 70% ya pentamethylenediethylenetriamine imagwiritsidwa ntchito makamaka popanga zinthu zofewa za thovu.Chothandizira chimakhala ndi ntchito yayikulu, kuthamanga kwa thovu mwachangu, kulimba kwambiri komanso kunyamula kwambiri.Mu thovu lofewa, 0.1-0.5 phr ya chothandizira pa 100 phr ya polyether imatha kuchita bwino.Itha kugwiritsidwanso ntchito ngati chothandizira chothandizira chithovu cholimba.
The five methyl two ethyleneamine three amine quaternary ammonium salt ndi chothandizira kuti chithovu chofewa chichedwe, chomwe chimagwiritsidwa ntchito kutalikitsa nthawi ya thovu.Ndi oyenera mankhwala thovu ndi mawonekedwe ovuta ndi bokosi mtundu thobvu ndondomeko, ndi bwino kapangidwe thovu ndi bwino akamaumba khalidwe.Kusiyanasiyana kwa mlingo wake ndi wotakata, ndipo kusintha kwa mlingo kulibe zotsatira zoonekeratu pa nthawi yoyera;Koma kuwonjezeka kwa mlingo kumatha kufupikitsa nthawi yomwe chithovu chikukwera ndikufupikitsa nthawi yochiritsa.