Aliphatic polyester polyol hom polyurethane muaj lub zog siab thiab hnav tsis kam vim muaj cov pawg polar xws li ester pawg thiab cov amino pawg hauv nws cov molecules, ua rau muaj zog cohesion thiab adhesion. Aliphatic (feem ntau hu ua adipic polyester) polyester diols feem ntau yog siv rau hauv kev tsim cov cam khwb cia polyurethane elastomers, thermoplastic polyurethane elastomers, microporous polyurethane ib leeg, PU tawv cob, polyurethane nplaum, polyurethane number case thiab xim muab tshuaj, ntaub coatings, thiab lwm yam. glycol tau los ntawm adipic acid thiab 1,4-butanediol, 1,6-hexanediol los yog ethylene glycol yog cov khoom siv waxy, uas ua rau polyurethane elastomer muaj zog crystallinity, siab pib adhesion, thiab siab mechanical zog ntawm lub khoom; Polyester, xws li PMA thiab PPA, npaj los ntawm sab pawg ntawm diols, yog kua thiab mos ntawm chav tsev kub. Nws yog siv rau inks, mos tawv, thiab lwm yam. PMA muaj zoo hydrolysis kuj.
Polyurethane ua los ntawm aromatic polyester muaj zoo heev hydrolysis tsis kam, kub tsis kam, thiab adhesion. Phthalic anhydride polyester polyol thiab aromatic polyester polyol npaj los ntawm pov tseg polyester / pov tseg PTA feem ntau yog siv los tsim cov khoom siv polyurethane ua npuas ncauj. Cov nplaim hluav taws kub nyhiab ntawm cov npuas dej nruj raws li tus nqi siab hydroxyl aromatic polyester polyol yog qhov zoo dua li qhov raws li polyether polyol. Hauv kev lag luam polyurethane ua npuas ncauj yas, cov tshuaj tsw qab polyester polyols feem ntau siv los hloov qee qhov lossis tag nrho cov polyether polyols hauv polyurethane ua npuas ncauj yas thiab polyisocyanate rigid foam plastic formulations. Ntxiv qee cov tshuaj tsw qab polyester polyols rau cov mis ntawm lub tub yees ua ke rau lub caij ntuj no tuaj yeem txhim kho qhov tawv thiab adhesion ntawm npuas. Phthalic anhydride polyester polyol yog tshwj xeeb tshaj yog haum rau polyisocyanurate (PIR) ua npuas ncauj. Cov yas ua npuas ncauj muaj ntau lub nplhaib benzene, uas tsis tsuas yog txhim kho cov cua sov ntawm cov npuas dej, tab sis kuj txhim kho cov nplaim hluav taws xob ntawm cov khoom. Aromatic polyester polyols yog dav siv nyob rau hauv tsev thiab txawv teb chaws los tsim cov sandwich ua npuas ncauj panels rau kev tsim kho thiab on-site spraying siv nyob rau hauv kev tsim kho kev lag luam. Ntxiv nrog rau cov khoom tseem ceeb ntawm polyether hom txhav polyurethane ua npuas ncauj, qhov nro polyurethane ua npuas ncauj uas muaj polyester kuj muaj qhov zoo ntawm cov ua npuas ncauj zoo, zoo toughness, zoo heev nplaim retardancy thiab tus nqi qis. Polyester polyols muaj ntau ntawm cov thawj hydroxyl pawg, muaj kev ua haujlwm siab, tuaj yeem siv rau ntawm qhov kub thiab txias, thiab tuaj yeem txo qis cov catalyst siv. Cov ntawv thov tshwj xeeb hauv kev lag luam ua npuas ncauj tawv muaj xws li: tawv ua npuas ncauj board thiab sandwich board, tshav kub rwb thaiv tsev sib xyaw rau cov tub yees thiab lub freezers, cov khoom siv hluav taws xob rwb thaiv tsev rau cov dej rhaub dej, txau ua npuas ncauj tawv, ntoo imitation, ib qho nyuaj ua npuas ncauj, ultra-low ntom ntim. ua npuas ncauj, tawv microporous ib leeg cov ntaub ntawv, thiab lwm yam.
Daim ntawv thov teb ntawm polyester polyols
Aug 05, 2023
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