Polyurethane ukuvenisha - material yokuqedela yesimanje

Ukuthuthukiswa ubuchwepheshe yesimanje ukwenziwa izinto kokuqeda ivumela ukukhiqiza yonke imikhiqizo fresh futhi entsha ne eziningi izindawo eliyingqayizivele. novelties okunjalo osebenza polyurethane lacquer.

Le nto imele Ukwakheka izixazululo ezahlukene hydroxyl isocyanates polyfunctional. Polyurethane lacquer uma isicelo amafomu phezu polymer esiqinile ngezinto ezingashi isakhiwo ngakuthathu. Le nqubo kwenzeka ngenxa ukusabela isocyanates nezingxenyana hydroxyl (polyesters akuphelele etholwe ukusabela ngokweqile utshwala polyhydric nge dibasic acid noma nge Izingxube we monobasic futhi dibasic fatty acid).

Ngokuvamile esetshenziswa futhi kancane hydrolyzed polyvinyl acetates, polyacetals akuphelele, cellulose esters, futhi phenol-formaldehyde resin ksilolformaldegidnye. Phakathi isocyanates esetshenziswa ngokuvamile ezisetshenziswa diisocyanate kanye Izingxube ezihlukahlukene zalo. Futhi, sebenzisa hexamethylene diisocyanate futhi imikhiqizo ukuphendula lokweqisa diisocyanate nge ugologo polyhydric futhi hydroxyl equkethe polyesters. Ukusebenza nalaba izinto zidinga izinyathelo ezikhethekile. Ngakho-ke kunengqondo ngaphezu ukusebenzisa "ivinjiwe" noma "ocashe" isocyanates, compounds zazo ukubola kalula lapho evuthayo. Leli qembu kuhlanganisa imikhiqizo ukusabela isocyanates nge malonic, ester acetoacetic, ethyleneimine futhi feniluretanom. Polyurethane lacquers ziyoncibilika usebenzisa esters, ketones, hydrocarbon kampompi ukuxova umuthi wokugoma, nitroparaffins. La mathuluzi diluent kuyinto xylene, toluene, hydrocarbon aliphatic.

Polyurethane lacquers ayatholakala njengenye-ingxenye noma ezimbili-ingxenye izingoma. Esimeni sesibili eceleni okulungiselelwe isixazululo compounds hydroxyl-equkethe, noma Izingxube lezi zakhi nezisombululo isocyanate ngaphambi kokusebenzisa lolu ejenti axutshwa. a lacquer ezimbili ingxenye ukulungele okunjalo kugcinwa kusukela amahora 4 kuya ku-48. ezinengilazi okunjalo asetshenziselwa enamathela of sokwelapha ashisayo nabandayo. kubhekwa esitebeleni ezinengilazi eyodwa ingxenye Unlimited ashisayo-elapha ezenziwe ngesisekelo okuthiwa "ivinjiwe" isocyanates.

Polyurethane ukuvenisha yakha ecwebezelayo, ezinengilazi nokunwebeka nge ubulukhuni okusezingeni eliphezulu, adhesion ezinhle, okusezingeni eliphezulu izakhiwo Kwe-dielectric Heating nokuzabalazela zamakhemikhali. Basuke ngokuya okusetshenziselwa ukuvikelwa ngokhonkolo, metal, evele zokhuni isetshenziselwa yokudweba imishini yamakhemikhali, sokuncibilikisa nokucwengisiswa izitshalo, ebhizinisini ukudla.

Iyatholakala polyurethane ukuvenisha for parquet, ifenisha, iraba, iphepha, lesikhumba, ezakhiwe oluhle ngemikhumbi yempi, izindwangu zokwenziwa kanye Plastics. Lokhu enamathela okuhlala isikhathi eside kakhulu futhi kuyasebenziseka, ukhula kakhulu ukuphila eshalofini ngezinto ezahlukene. Omunye-ingxenye ezinengilazi avame ukusetshenziswa ukuvikelwa zethusi, aluminium nensimbi imikhiqizo.

amanzi polyurethane ukuvenisha ivikela izindonga sokhuni Uphahla lwangaphakathi isikhunta nangesikhunta. Akuve ukukhanya nokushisa ukumelana. Lokhu enamathela esobala ivumela kahle ukugqamisa ubuhle bemvelo izinkuni.