Cov nplaum polyurethane yog hais txog cov nplaum uas muaj cov urethane pawg (-NHCOO-) lossis isocyanate pawg (-NCO) hauv cov saw hlau. Cov nplaum ua Polyurethane tau muab faib ua ob pawg: polyisocyanate thiab polyurethane. Polyisocyanate cov saw molecular muaj cov isocyano pawg (-NCO) thiab urethane pawg (-NH-COO-), yog li cov nplaum polyurethane ua rau pom qhov kev ua haujlwm siab thiab polarity. Nws muaj cov tshuaj lom neeg zoo nrog cov khoom siv uas muaj cov dej ua haujlwm hydrogen, xws li ua npuas, yas, ntoo, tawv, ntaub, ntawv, ceramics thiab lwm yam khoom siv ntxeem tau, nrog rau cov hlau, iav, roj hmab, plastics thiab lwm yam khoom siv nrog thaj chaw du.
Tsis hais txog ntawm cov polyurethane nplaum, cov isocyanate pawg hauv lub system ua nrog cov active hydrogen-muaj cov tshuaj nyob hauv lossis sab nraud los tsim cov pawg polyurethane lossis polyurea, uas zoo heev txhim kho lub zog ntawm lub system thiab ua tiav lub hom phiaj sib txuas.
(1) Zoo dej tsis kam thiab nruab nrab tiv.
(2) Qhov ua kom muaj kev sib raug zoo siab thiab qhov pib ua kom tau zoo.
(3) Zoo cia ruaj khov.
(4) Tsis kam mus txias thiab yaj, thiab siab kub ua haujlwm.
(5) Kev ceev nrawm nrawm nrawm thiab cov yeeb yaj kiab zoo-ua cov qauv ntawm qhov tsis tshua muaj qhov kub.
(6) Kev tsim kho zoo thev naus laus zis.
