Melamine formaldehyde resin la beddelay waa polymer laga helay falcelinta melamine iyo formaldehyde, oo sidoo kale loo yaqaan melamine formaldehyde resin ama resin melamine.
Sifooyinka Jireed: Resin-ka melamine formaldehyde ee la daweeyay waa mid aan midab lahayn oo hufan, wuxuu ku xasilan yahay biyaha karkaraya, xitaa waxaa loo isticmaali karaa 150°C. Waxay leedahay sifooyin is-damisa, sifooyin qaanso ah, iyo sifooyin farsamo oo wanaagsan.
Waxyaabaha kiimikaad: Alaabta ceeriin waa melamine iyo 37% formaldehyde xal aqueous. Saamiga molar ee formaldehyde iyo melamine waa 2 ~ 3. Tirooyinka kala duwan ee beddelka N-hydroxymethyl ayaa lagu soo saaray hal tallaabo, ka dibna waxaa lagu sii ururin karaa resins toosan. Xaaladaha falcelintu way kala duwan yihiin, miisaanka molecular ee alaabaduna way ka duwan yihiin. Waxay u dhaxayn kartaa biyo-milmi kara ilaa biyo adag, ama xitaa adag oo aan la milmi karin. Qiimaha pH wuxuu saameyn weyn ku leeyahay heerka falcelinta. Xalka resin-ka ee kor lagu diyaariyay ma fududa in la kaydiyo, iyo qalajinta buufinta ayaa inta badan loo isticmaalaa warshadaha si loo soo saaro adag budada ah. Xabagta melamine kuma daaweyso heerkulka qolka. Guud ahaan waxa lagu daaweeyaa kulaylka 130-150°C. Ku darida qadar yar oo aashito ah si ay u kiciso heerka daawaynta waxay kordhin kartaa heerka bogsashada.
Codsiga warshadaha maqaar: Warshadaha maqaarka, resin melamine waa mid caadi ahaan loo isticmaalo ka-hortagga, dib-u-madawga, iyo buuxinta resin, oo ay ka mid yihiin resin trimethyl melamine oo ah resin amino si weyn loo isticmaalo. Amino resin waxa uu leeyahay habka madawga sida aldehyde: prepolymer-ku waxa uu galaa maqaarka, marka uu qiimaha pH hoos u dhaco, prepolymer-ku waxa uu si toos ah isugu ururiyaa molecules cabbir gaar ah oo maqaarka ah. Iyada oo la adeegsanayo uumiga firfircoon -NHCH2OH ee molecule oo leh kooxaha amino ee silsiladda kolajka peptide, nidaam isku-dhafan oo isku-dhafan ayaa la sameeyay si loo gaaro ujeedada tannins.
Sababtoo ah falcelinta sare ee methylal, molecules trimethyl melamine waxay u nugul yihiin falcelinta polycondensation, soo saarista unugyo iskutallaab ah oo aan toos ahayn waxayna luminayaan maqaarka. Waqtigan xaadirka ah, hababka ugu ballaaran ee loo isticmaalo uguna muuqda waa in si habboon loo xannibo kooxda hydroxymethyl si loo yareeyo dhaqdhaqaaqeeda, looga hortago uumiyo dheeraad ah oo u dhexeeya molecules, ama soo bandhigista kooxaha hydrophilic qaab dhismeedka molecular si loo kordhiyo milanka biyaha.
Waqtigan xaadirka ah, wakiilada haragga ee melamine resin waxaa inta badan lagu diyaariyaa gudaha iyo dibadda iyada oo lagu buufiyo melamine, dicyandiamide oo keliya ama lagu qaso formaldehyde, waxaana si habboon wax looga beddelay sidii loogu baahdo.
Codsiyada warshadaha waraaqaha:
Sababtoo ah xabagta formaldehyde ee melamine waxay ka kooban tahay kooxaha hydroxymethyl, waxay samayn kartaa qaab dhismeed ka dhexeeya xirmooyinka fiber-ka. Isku xirka unugyo kala duwan ayaa soo saara biyo, taasoo ka dhigaysa warqad qoyan. Sidaa darteed, waxaa inta badan loo isticmaalaa sida wakiilka xoojinta qoyan iyo wakiilka biyaha ee warshadaha waraaqaha.
Anionic modified melamine formaldehyde resin
Inta badan waa xabagta melamine ee sulfonated. Marka la barbardhigo, xabagta sulfamate-la beddelay ayaa ka fiican oo si ballaaran loo isticmaalo. Alaabta noocan ah waxaa lagu daweyn karaa xaaladaha aashitada, dhexdhexaadka ah, ama alkaline, waxaana lagu dari karaa slurry ama loo isticmaali karaa dahaarka. Dhibaatadu waxay tahay in marka wax-beddeluhu uu ka falceliyo formaldehyde, roobab iyo crystallization ayaa dhacaya, wayna adagtahay in la sifeeyo.
Resin melamine formaldehyde oo wax laga beddelay Cationic
Xabagta Melamine ee lagu beddelay reagents cationic sida triethanolamine, dimethylamine, iwm. ayaa leh koronto togan, si dhakhso ah ayaa loo nuugi karaa fiilooyinka, waxaana lagu daweyn karaa qiimo sare oo pH ah. Waxay ka fogaataa saamaynta xun ee resin melamine-formaldehyde ee caadiga ah ee cadaanka iyo cimri dhererka warqadda. Waqtigan xaadirka ah, cilmi-baarista ugu weyn ee goobtan gudaha iyo dibaddaba waa in la isticmaalo khamriga yar yar, sida methanol, butanol, iwm, sida wakiilada etherifying iyo qadar yar oo wax ka beddelka cationic ee hoos yimaada catalysis ee p-toluene sulfonic acid si ay u xannibaan kooxahooda firfircoon iyo hagaajinta xasiloonida alaabta. .
Hababka ugu muhiimsan ee lagu yareeynayo waxa ku jira formaldehyde bilaashka ah waa: iyadoo la isticmaalayo walxaha dabiiciga ah ee leh awooda oksaydhaynta, sida formic acid iyo hydrogen peroxide, kuwaas oo oxidize formaldehyde galay CO2 iyo biyo. Inta lagu jiro habka diyaarinta resinka, dhexdhexaadiyeyaasha formaldehyde sida borax, propylene glycol, iyo sodium bisulfite ayaa lagu daraa, iyo nadiifinta faakuumka ayaa la isticmaalaa.
Codsiyada warshadaha daahan
Melamine formaldehyde resin oo lagu beddelay etherification ee walxaha alkolada yar (sida methanol, butanol, isobutane) ayaa si weyn loogu isticmaalaa warshadaha daahan waxaana inta badan loo isticmaalaa sidii wakiilka iskutallaabta ee daahan biyaha ku salaysan. Sida alaabta ceeriin ee koofiyadaha iyo alwaaxyada, waxaa loo qaabayn karaa resins amino oo leh xabagta alkyd, resin polyester, resins acrylic, resins epoxy, iwm, waxaana si weyn loogu isticmaalaa baabuurta, alaabta guriga, qalabka guriga iyo warshadaha kale.
Macluumaad dheeraad ah oo ku saabsan SINOYQX modified melamine formaldehyde resin, fadlan nagala soo xiriir emayl ahaan: [email protected] , ama nagala soo xiriir: +86-28-8411-1861.
Sawirada iyo qoraalada qaar ayaa laga soo saaray internetka, xuquuqda daabacaadana waxaa iska leh qoraaga asalka ah. Haddii ay jiraan wax xadgudub ah, fadlan nala soo xiriir si aan u tirtirno.