Polyglycolol thiab polyisocyanate
Cov ntaub ntawv nyoos ntawm Pu Resin (Polyurethane Resin) suav nrog ob pawg hauv qab no:
Polyglycolol (polyol)
Polyglycol yog ib qho ntawm cov ntaub ntawv raw ntawm Pu Resin Pu, feem ntau suav nrog Polyester Polyols thiab Polyether Polyols.
Lwm hom muaj xws li Polycarbonate polyols, polycaprolactone polyols thiab polyacrylate polyols.
Qhov kev xaiv ntawm polyglycolol nyob ntawm qhov xav tau ntawm cov khoom. Piv txwv li, Polyester Polyol feem ntau siv hauv cov ntawv thov ua kom xav tau cov khoom zoo nkauj, thaum lub sijhawm polyether Polyol yog qhov tsim nyog rau cov kev lom zem hydrolysis.
Polyisocyanate (Isocyanate)
Polyisocyanate yog lwm cov khoom siv tseem ceeb ntawm Pu Resin, feem ntau suav nrog Diisocyanate, thiab lwm yam.
Nws reacts nrog polyglycol los ua cov pab pawg carbamate (-nh-coo-), uas yog cov txheej txheem txheej txheem ntawm pu resins.
