Modified melamine formaldehyde resin ipolymer inowanikwa nekuita kwe melamine uye formaldehyde, inozivikanwawo se melamine formaldehyde resin kana melamine resin.
Hunhu hwemuviri: Resin yemelamine formaldehyde yakacheneswa haina ruvara uye inoonekera, inogara mumvura iri kufashaira, uye inogona kutoshandiswa pa150°C. Ine hunhu hwekudzima yoga, hunhu hwe arc, uye hunhu hwakanaka hwemakanika.
Kemikari zvivakwa: Iyo mbishi zvinhu ndeye melamine uye 37% formaldehyde aqueous mhinduro. Iyo molar ratio ye formaldehyde kune melamine ndeye 2 ~ 3. Huwandu hwakasiyana hweN-hydroxymethyl substituents inogadzirwa mune imwe nhanho, uye yobva yadzokororwa kuita mutsara resins. Mamiriro ekuita akasiyana, uye huremu hwemamorekuru hwechigadzirwa hwakasiyana. Inogona kubva kubva mumvura-inonyungudika kusvika isinganyanyi kunyungudika mumvura, kana kunyange isinganyungudike uye infusible yakasimba. Iyo pH kukosha ine simba guru pane maitiro ekuita. Mushonga we resin wakagadzirirwa pamusoro hausi nyore kuchengeta, uye kupfapfaidza kuomesa kunowanzoshandiswa muindasitiri kugadzira hupfu hwakasimba. Melamine resin haipore patembiricha yekamuri. Kazhinji inorapwa nekushisa pa130-150°C. Kuwedzera huwandu hudiki hweasidhi kukonzeresa mwero wekurapa kunogona kuwedzera mwero wekurapa.
Kushandiswa muindasitiri yematehwe: Muindasitiri yematehwe, melamine resin ndiyo inowanzoshandiswa pre-tanning, re-tanning, uye kuzadza resin, pakati peiyo trimethyl melamine resin inoshandiswa zvakanyanya amino resin. Amino resin ine maitiro ekupisa senge aldehyde tanning: iyo prepolymer inopinda muganda, uye sezvo iyo pH kukosha inodonha, iyo prepolymer inonamira yega kuita mamorekuru eimwe saizi muganda. Kuburikidza ne condensation yeanoshanda -NHCH2OH mumorekuru nemapoka emaamino pane collagen peptide chain, covalent cross-linking system inoumbwa kuzadzisa chinangwa chetannins.
Nekuda kweiyo yakakwira reactivity ye methylal, trimethyl melamine mamorekuru anowanzo kuita polycondensation reactions, achigadzira asiri-mutsara-muchinjika-akabatanidzwa mamorekuru uye kurasikirwa nekutsvuka. Parizvino, nzira dzinonyanya kushandiswa uye dziri pachena ndedzekuvhara zvakakodzera boka re hydroxymethyl kuderedza basa raro, kudzivirira kuwedzera kunyunguduka pakati pemamorekuru, kana kuunza mapoka e hydrophilic muchimiro chemolecular kuti iwedzere kunyungudika kwemvura.
Parizvino, melamine resin tanning agents anonyanya kugadzirwa kumba nekune dzimwe nyika kuburikidza ne condensation ye melamine, dicyandiamide chete kana kusanganiswa ne formaldehyde, uye anogadziridzwa zvakakodzera sezvinodiwa.
Zvikumbiro muindasitiri yemapepa:
Nekuti melamine formaldehyde resin ine hydroxymethyl mapoka, inogona kugadzira etherified chimiro pakati pefiber bundles. Uku kuyambuka-kubatanidza pakati pemamorekuru akasiyana kunoburitsa mvura, zvichiita kuti bepa rinyorove. Naizvozvo, inonyanya kushandiswa seyakanyorova inosimbisa mumiriri uye mumiriri wemvura muindasitiri yemapepa.
Anionic yakagadziridzwa melamine formaldehyde resin
Iyo inonyanya sulfonated melamine resin. Mukuenzanisa, sulfamate-modified resin iri nani uye inoshandiswa zvakanyanya. Mhando iyi yechigadzirwa inogona kurapwa pasi pe acidic, neutral, kana alkaline mamiriro, uye inogona kuwedzerwa kune slurry kana kushandiswa mukuputira. Dambudziko nderekuti kana iyo modhifita ikaita ne formaldehyde, kunaya uye crystallization inoitika, uye zvinonetsa kusefa kunze.
Resin yeMelamine Formaldehyde yakagadziriswa neCationic
Melamine resin yakagadziridzwa ne cationic reagents yakadai se triethanolamine, dimethylamine, nezvimwewo ine magetsi akanaka, inogona kukurumidza kutorwa nefibers, uye inogona kurapwa pane yakakwirira pH kukosha. Iyo inodzivirira iyo yakaipa mhedzisiro yeyakajairwa melamine-formaldehyde resin pakuchena uye kusimba kwepepa. Parizvino, tsvagiridzo huru mundima iyi kumba nekune dzimwe nyika ndeye kushandisa zvinwiwa zvidiki zvema molecular, senge methanol, butanol, nezvimwewo, senge etherifying agents uye shoma shoma ye cationic modifiers pasi pe catalysis ye p-toluene sulfonic acid kuvhara mapoka avo anoshanda uye kuvandudza chigadzirwa kugadzikana. .
Nzira huru dzekudzikisa zvirimo zvemahara formaldehyde ndeidzi: kushandisa organic matter ine oxidizing kugona, senge formic acid uye hydrogen peroxide, iyo inogona oxidize formaldehyde mu CO2 nemvura. Munguva yekugadzirira resin, formaldehyde neutralizers yakadai seborax, propylene glycol, uye sodium bisulfite inowedzerwa, uye vacuum distillation inoshandiswa.
Zvikumbiro muindasitiri yekupfeka
Melamine formaldehyde resin yakagadziridzwa ne etherification yezvinhu zvakaderera-doro (zvakadai se methanol, butanol, isobutane) inoshandiswa zvakanyanya mumhizha yekuputira uye inonyanya kushandiswa semuchinjiro wekubatanidza mvura-based coatings. Sechinhu chakagadzirwa chetopcoat uye maprimers, inogona kugadzirwa kuita amino resin ane alkyd resin, polyester resin, acrylic resin, epoxy resins, nezvimwewo, uye inoshandiswa zvakanyanya mumotokari, fenicha, midziyo yemumba uye mamwe maindasitiri.
Ruzivo rwakawanda nezve SINOYQX modified melamine formaldehyde resin, ndapota taura nesu kuburikidza neemail: [email protected] , kana kutitaurira panhamba iyi: +86-28-8411-1861.
Mimwe mifananidzo uye zvinyorwa zvinoburitswa kubva paInternet, uye kodzero yacho ndeyemunyori wekutanga. Kana paine chero kukanganisa, ndapota taura nesu kuti tibvise.