Biyaha ku salaysan (VOC & HAPs) daahan bilaashka ah ayaa laga diyaarin karaa dareeraha epoxy aliphatic iyo polyols capropone polymerized cidhiidhi ah waxaana lagu dabaqi karaa qalabka caadiga ah waxayna awood u leedahay in lagu beddelo daboolka budada. Waa maxay dhibcaha dareenka diyaarinta biyaha. Dahaarka dareeraha dareeraha ah ee epoxy?Khubiirka ururka warshadaha resin epoxy ee Shiinaha ayaa sameeyay hordhac gaar ah maalmo ka hor.
Maalgelinta qalabka aasaasiga ah ee lagama maarmaanka u ah khad cusub oo daahan budada ah ayaa laga fogaan karaa iyadoo la adeegsanayo qalabka lagu buufiyo daahan dareeraha dhaqameed.Xirmooyinkaas waxaa lagu beddeli karaa iyada oo lagu qasi karo biyo ama iyada oo la isku dhejiyo daboolka biyaha ku salaysan ee leh dhumucyada cellulose. Iyada oo diglycidyl ether-ka caadiga ah ee bisphenol A (bpa) resin, alicyclic epoxy wuxuu leeyahay dhowr arrimood oo soo socda: farqiga u dhexeeya A sida silsiladda ugu weyn. aliphatic, falcelinta aashitada si degdeg ah, laakiin leh amine/amides epoxy daawooyinka sida caadiga ah loo isticmaalo asal ahaan kama falceliyaan, kuma jiraan koloriin, viscosity of 350 centipoise iyo diglycidyl ether of bisphenol A (bpa) resin sida 11000 centipoise, isku mar. Waxa kale oo ay leedahay iska caabin cimilo aad u fiican.Codsiga ee epoxy aliphatic viscosity hoose ee daahan cationic UV ayaa si weyn u kordhay.Waxaa jiray warbixino badan oo ku saabsan diyaarinta iyo sifooyinka noocan oo kale ah 100% daahan adag oo aan "VA", laakiin waxaa jira qoraalo faahfaahsan oo yar oo ku saabsan codsigeeda ee daahan daaweynta kulaylka.In mabda'a, cationic daahan UV formula farsamo aqoon-sida sidoo kale loo isticmaalo nidaamka daaweynta kulaylka, laakiin labada sidoo kale waxay leeyihiin kala duwan sida daahan UV guud ahaan ma buufin dhismaha, sidaas viscosity dhismaha waa ka sarreeya buufiyo daahan daahan kulaylka, ee dubista cationic daahan nooca biyaha waxaa loo isticmaali karaa sida VOC diluent.
Polyols Cepolactone ayaa loo isticmaalay sidii dareere wax ku ool ah oo loogu talagalay dahaarka dareeraha ku saleysan waxayna dardargelin karaan daaweynta dahaarka UV cationic.Kooxaha hydroxyl ee polyols kuwaas oo ku jira cationic UV ma aha oo kaliya dedejin karaan daaweynta, laakiin sidoo kale waxay u horseedi karaan dareen daaweyn gaar ah oo qoyaanka ah. of polyols kordhiyaa dulqaadka biyaha, si ay biyaha loo isticmaali karaa sida khafiif ah VOC-free in formulations rinjiga ka kooban epoxies aliphatic iyo polyols, kuwaas oo dhab ahaantii sare daahan organic adag qaso biyo.Biyaha ayaa laba faa'iidooyin: viscosity hoose ee Maqnaanshaha VOC, iyo isticmaalka cabbirada rinjiga biyaha ku salaysan ee caadiga ah iyo kuwa si fiican loo yaqaan si looga hortago suldaanka iyo xakamaynta rheological. Maadaama qayb kasta oo ka mid ah qaaciddada ay qayb ahaan ka mid tahay oo kaliya biyaha, qadarka biyaha ee la nuugi karaa waa xaddidan tahay.Waa in taxaddar la sameeyaa si looga fogaado in lagu daro biyo badan si ay u keento kala soocida wajiga.
Dhumucda Cellulosic waa wax ku ool ah in daahan biyaha ku salaysan, laakiin ma cadda in ay waxtar u leeyihiin in 100% adag, daahan epoxy aliphatic biyaha-lafsaday. Shaqadii hore waxay muujisay in biyo-lafsaday 100% epoxides adag waxay ahaayeen thixotropic marka lagu qiyaaso viscometer Brookfield ah. Baaritaanka dhumucyada kala duwan ayaa muujinaya in dhumucda cellulose ay leeyihiin sifooyinka ugu fiican ee dhamaystiran.Marka la kululeeyo 40 ~ 60 ℃, muuqaalka ugu fiican ee filimka ayaa la heli karaa iyadoo la adeegsanayo qoriga buufinta.Heerkulka dhismaha hooseeya wuxuu ka dhigayaa filimka la daaweeyay inuu soo saaro more orange peel.China epoxy resin warshadaha khubarada ayaa sheegay in faa'iidada ugu weyn ee daahan budada waxaa lagu dahaadhay hufnaan sare, waxtarka sare inta badan waa iyada oo dib u soo kabashada ee budada ah si loo gaaro, si daahan budo u dhiganta Daahan noocan oo kale ah ee dareeraha ah waxay u baahan yihiin hab ay dib ugu soo ceshadaan rinjiga duqsiga. Tan iyo qaabka rinjiga lagu sharraxay halkan kuma jiro dareeraha organic ee soo kabashada aad u sahlan, biyaha lumay ee habka soo kabashada ayaa si fudud loo hagaajin karaa iyadoo la cabbirayo korantada korantada marka loo baahdo, badbaadinta tamarta by u baahan heerkulka dubista hoose marka loo eego heerkulka sare ee dubista ee looga baahan yahay daahan budada ah. Ikhtiyaarka kale ee la qiimeeyaa waa in lagu buufiyo epoxies anhydrous, polyols, iyo pigments habka "Unicarb", kaas oo ka waxtar badan daahan budada.Haddii aan loo baahnayn daahan bilaash ah oo VOC ah, si fudud ugu dar dareerayaasha caanaha.
About note formula ah, Shiinaha epoxy resin warshadaha khubara ayaa sheegay in, waayo, cationic daawaynta maxaa yeelay, alkali joojin doonaa daawaynta, si dhammaan waxyaabaha lagu daro iyo wakiilada rheological waa in aanay ku jirin alkaline, pigments alkaline iyo amines daaweeyay pigments joojin doonaa curing.Alkalescent haddii pigments Damine doonaa. sidoo kale waxay joojisaa daaweynta cationic, midabada alkaline-ka iyo waxyaabaha lagu daro ee daahan cationic aan la isticmaali karin, daawaynta waxay ku xiran tahay kicinta FC-520 ee qadar yar oo amine sealant volatilization, haddii filimku aad u qaro weyn yahay ama foornada aan hawo lahayn, amine aan si buuxda looga saari karaa filimka iyo xannibi curing.Viscosity kordhay kororka polyols laanta kororka darajada: khamriga dibasic ka badan saddex ama afar yuan dakhliga hoose viscosity ee rinjiga, khamriga iyo glycol wadaagaan baahida loo qabo in la kordhiyo qadarka qiimaha epoxy ( R) waxaa lagu heli karaa daahan adag, qiyaasta sare ee daxalka epoxy waa la wanaajin karaa, korodhka qiyaasta kicinta waxay dedejin kartaa xawaaraha daaweynta laakiin sidoo kale waxay yareyn kartaa daxalka, saamiga molar ee epoxy iyo hydroxyl R ayaa saameyn weyn ku leh xawaaraha daaweynta .
Anyhow, alicyclic epoxy with polyols caprolactone waa viscosity hoose iyo xataa ma daahan VOC, daahan waxaa lagu qasi karaa biyo si ay u buufiyo viscosity, dhumucdiisuna cellulose siin kartaa barafka biyaha of 100% epoxy adag iyo polyols daahan si wax ku ool ah looga hortago sagging, nidaamka daawaynta xawaaraha waxaa lagu go'aamiyaa doorsoomayaasha soo socda: saamiga molar ee epoxy iyo hydroxyl, khamriga multivariate iyo epoxy functionality, qiyaasta kicinta iyo heerkulka daaweynta, formula si fudud loo isticmaali karaa in diyaarinta rinjiga, sababtoo ah noocan oo kale ah daahan for cationic. daaweynta rinjiga aasaasiga ah iyo substrate waxay joojin kartaa daaweynta.
Waqtiga boostada: Abriil-06-2021