Daim ntawv thov ntawm Polyurethane Prepolymer
May 20, 2021
Ib feem ntawm cov nplaum nplaum feem ntau siv cov prepolymers uas muaj cov pab pawg NCO lossis cov pab pawg NCO. Prepolymers uas muaj cov pab pawg NCO dawb feem ntau tuaj yeem siv ncaj qha lossis tsim rau hauv chav tsev kub kho ib qho khoom siv dej-kho polyurethane nplaum lossis txheej txheej.
Thaum npaj cov prepolymers rau ib qho adhesives, txawm nyob rau hauv cov ntaub ntawv los yog kev daws teeb meem, cov molar ratio ntawm NCO rau OH pawg feem ntau yog tswj kom muaj ntau tshaj 1 nyob rau hauv cov saw extension cov tshuaj tiv thaiv ntawm polyester polyol thiab TDI los yog MDI, thiaj li hais tias tus dawb NCO cov ntsiab lus nyob rau hauv cov tshuaj tiv thaiv cov khoom yog tswj ntawm ib theem. NCO-terminated prepolymers tuaj yeem siv tau rau ntau qhov chaw xws li cov nplaum nplaum, txheej, thiab cov tshuaj impregnating.
Cov polyurethane prepolymer yog tov nrog khib nyiab roj hmab hais thiab nchuav rau hauv elastic cushions siv nyob rau hauv pej xeem chaw xws li kindergartens. Nws yog ib qho piv txwv ntawm daim ntawv thov ntawm noo noo-kho polyurethane prepolymer raws li cov roj hmab particle nplaum.