Mgbanwe melamine formaldehyde resin bụ polymer nwetara site na mmeghachi omume nke melamine na formaldehyde, nke a makwaara dị ka melamine formaldehyde resin ma ọ bụ melamine resin.
Àgwà anụ ahụ: Resin melamine formaldehyde a gwọrọ agwọ enweghị agba ma doo anya, ọ kwụsiri ike na mmiri esi mmiri, a pụkwara iji ya na 150°C. O nwere ihe ndị na-eme ka ọ gbanyụọ onwe ya, ihe ndị na-eme ka ọ gbanyụọ, na ihe ndị dị mma maka igwe.
Njirimara kemịkalụ: akụrụngwa bụ melamine na 37% formaldehyde aqueous solution. Oke molar nke formaldehyde na melamine bụ 2 ~ 3. A na-emepụta ọnụọgụ dị iche iche nke ihe ngbanwe N-hydroxymethyl n'otu nzọụkwụ, wee tinyekwuo n'ime resins linear. Ọnọdụ mmeghachi omume dị iche iche, na ịdị arọ molekụla nke ngwaahịa ahụ dị iche. Ọ nwere ike ịmalite site na mmiri-soluble ruo na nke siri ike sospọtụ n'ime mmiri, ma ọ bụ ọbụna ihe siri ike na-esighị ike na nke a na-apụghị ime eme. Uru pH nwere mmetụta dị ukwuu na ọnụego mmeghachi omume. Ngwọta resin a kwadebere n'elu adịghị mfe ịchekwa, a na-ejikarị ihicha mmiri na ụlọ ọrụ na-emepụta ihe siri ike. Melamine resin anaghị agwọta na okpomọkụ ụlọ. A na-agwọ ya na okpomọkụ na 130-150 ° C. Ịtinye obere acid iji mee ka ọnụ ọgụgụ ọgwụgwọ ahụ dịkwuo elu nwere ike ịbawanye ọnụ ọgụgụ ọgwụgwọ.
Ngwa na ụlọ ọrụ akpụkpọ anụ: Na ụlọ ọrụ akpụkpọ anụ, melamine resin bụ ihe a na-ejikarị eme ihe tupu tanning, re-tanning, na resin na-ejuputa, n'ime nke trimethyl melamine resin bụ amino resin a na-ejikarị eme ihe. Amino resin nwere usoro tanning dị ka aldehyde tanning: prepolymer na-abanye n'ime akpụkpọ ahụ, na ka uru pH na-adaba, prepolymer na-abanye n'ime ụmụ irighiri ihe dị na akpụkpọ ahụ. Site na condensation nke na-arụsi ọrụ ike -NHCH2OH na molekul nwere otu amino dị iche iche na collagen peptide yinye, a na-emepụta usoro njikọ cross-covalent iji nweta nzube nke tannins.
N'ihi mmeghachi omume dị elu nke methylal, ụmụ irighiri melamine trimethyl na-enwekarị mmeghachi omume polycondensation, na-emepụta ụmụ irighiri ihe na-ejikọtaghị ọnụ ma na-efunahụ tanning. Ka ọ dị ugbu a, ụzọ a na-ejikarị eme ihe na nke pụtara ìhè bụ igbochi otu hydroxymethyl n'ụzọ kwesịrị ekwesị iji belata ọrụ ya, gbochie condensation ọzọ n'etiti ụmụ irighiri ihe, ma ọ bụ iwebata ìgwè hydrophilic n'ime usoro ihe omimi iji mee ka mmiri dịkwuo elu.
Ka ọ dị ugbu a, a na-akwadebe ndị na-ahụ maka tanning melamine resin n'ụlọ na ná mba ọzọ site na condensation nke melamine, dicyandiamide naanị ma ọ bụ gwakọta ya na formaldehyde, a na-agbanwekwa ha nke ọma ka ọ dị mkpa.
Ngwa na ụlọ ọrụ akwụkwọ:
N'ihi na melamine formaldehyde resin nwere otu hydroxymethyl, ọ nwere ike ịmepụta usoro etherified n'etiti eriri eriri. Njikọ a n'etiti ụmụ irighiri ihe dị iche iche na-emepụta mmiri, na-eme ka akwụkwọ ahụ dị nro. Ya mere, a na-ejikarị ya dị ka onye na-agba ume mmiri na onye na-ahụ maka mmiri na ụlọ ọrụ akwụkwọ.
Anionic gbanwetụrụ melamine formaldehyde resin
Ọ bụ n'ụzọ bụ isi sufonated melamine resin. N'iji ya tụnyere, resin a gbanwere sulfmate ka mma yana ejiri ya mee ihe. Enwere ike ịgwọ ụdị ngwaahịa a n'okpuru ọnọdụ acidic, na-anọpụ iche, ma ọ bụ alkaline, a pụkwara itinye ya na slurry ma ọ bụ jiri ya mee ihe. Nsogbu bụ na mgbe modifier na-emeghachi omume na formaldehyde, mmiri ozuzo na crystallization na-eme, ọ na-esikwa ike nzacha.
Resin melamine formaldehyde nke cationic gbanwere
Resin melamine megharịrị ya na reagents cationic dị ka triethanolamine, dimethylamine, wdg nwere ọkụ eletrik dị mma, enwere ike itinye ya ngwa ngwa site na eriri, yana enwere ike gwọọ ya na uru pH dị elu. Ọ na-ezere mmetụta ọjọọ nke melamine-formaldehyde resin nkịtị na ịdị ọcha na ịdịte aka nke akwụkwọ. Ka ọ dị ugbu a, nchọpụta bụ isi n'ọhịa a n'ụlọ na ná mba ọzọ bụ iji obere mmanya na-egbu egbu, dị ka methanol, butanol, wdg, dị ka ndị na-eme ka etherifying na obere ego nke cationic modifiers n'okpuru catalysis nke p-toluene sulfonic acid iji gbochie otu ha na-arụ ọrụ ma melite nkwụsi ike ngwaahịa. .
Ụzọ ndị bụ isi iji belata ọdịnaya nke formaldehyde n'efu bụ: iji ihe ndị na-edozi ahụ nwere ikike oxidizing, dị ka formic acid na hydrogen peroxide, nke nwere ike oxidize formaldehyde n'ime CO2 na mmiri. N'oge usoro nkwadebe resin, a na-agbakwunye formaldehyde neutralizers dị ka borax, propylene glycol, na sodium bisulfite, na-eji distillation oghere.
Ngwa na ụlọ ọrụ mkpuchi
Melamine formaldehyde resin gbanwere site na etherification nke obere mmanya na-aba n'anya (dị ka methanol, butanol, isobutane) bụ nke a na-ejikarị eme ihe na ụlọ ọrụ mkpuchi ma na-ejikarị eme ihe dị ka onye na-ejikọta ọnụ maka mkpuchi mmiri. Dị ka akụrụngwa maka topcoats na primers, ọ nwere ike ịmepụta ya na amino resins na alkyd resins, polyester resins, acrylic resins, epoxy resins, wdg, a na-ejikwa ya na ụgbọala, ngwá ụlọ, ngwa ụlọ na ụlọ ọrụ ndị ọzọ.
Maka ozi ndị ọzọ gbasara SINOYQX modified melamine formaldehyde resin, biko kpọtụrụ anyị site na email: [email protected] , ma ọ bụ kpọọ anyị oku na: +86-28-8411-1861.
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