ʻO ka melamine formaldehyde resin i hoʻololi ʻia he polymer i loaʻa ma ka hopena o ka melamine a me ka formaldehyde, ʻike ʻia hoʻi me ka melamine formaldehyde resin a i ʻole melamine resin.
Nā ʻano kino: ʻAʻohe kala a moakaka ka resin melamine formaldehyde i hoʻōla ʻia , paʻa i ka wai e paila ana, a hiki ke hoʻohana ʻia ma 150°C. Loaʻa iā ia nā ʻano kinai ponoʻī, nā ʻano arc, a me nā ʻano mechanical maikaʻi.
Nā waiwai kemika: ʻO nā mea maka he melamine a me 37% formaldehyde aqueous solution. ʻO ka ratio molar o formaldehyde i ka melamine he 2 ~ 3. Hoʻokumu ʻia nā helu like ʻole o nā mea pani N-hydroxymethyl i hoʻokahi ʻanuʻu, a laila hoʻohui hou ʻia i loko o nā resins linear. He ʻokoʻa nā ʻano hopena, a ʻokoʻa ke kaumaha molekala o ka huahana. Hiki ke hoʻoheheʻe ʻia mai ka wai-soluble a hiki ʻole ke hoʻoheheʻe ʻia i loko o ka wai, a i ʻole paʻa paʻa ʻole a infusible. He mana nui ko ka pH waiwai i ka helu pane. ʻAʻole maʻalahi ka mālama ʻana i ka hopena resin i hoʻomākaukau ʻia ma luna, a hoʻohana pinepine ʻia ka hoʻomaloʻo ʻana i ka ʻoihana e hana i kahi paʻa paʻa. ʻAʻole hoʻōla ka melamine resin ma ka lumi wela. Hoʻomaʻamaʻa maʻamau ia ma 130-150 ° C. ʻO ka hoʻohui ʻana i kahi wahi liʻiliʻi o ka waika e hōʻemi i ka wikiwiki o ka hoʻōla ʻana e hiki ke hoʻonui i ka nui o ka mālama ʻana.
Hoʻohana i ka ʻoihana ʻili: I ka ʻoihana ʻili, ʻo ka melamine resin he mea maʻamau i hoʻohana mua ʻia, re-tanning, a me ka hoʻopiha piha ʻana, a ma waena o ka trimethyl melamine resin he amino resin i hoʻohana nui ʻia. ʻO ka resina Amino kahi hana tanning e like me ka aldehyde tanning: komo ka prepolymer i ka ʻili, a i ka hāʻule ʻana o ka waiwai pH, e hoʻokuʻu ʻokoʻa ka prepolymer i loko o nā molekala o kahi nui o ka ʻili. Ma o ka condensation o ka hana -NHCH2OH i loko o ka mole me nā pūʻulu amino ma ke kaulahao peptide collagen, ua hoʻokumu ʻia kahi ʻōnaehana cross-linking covalent e hoʻokō i ke kumu o nā tannins.
Ma muli o ke kiʻekiʻe o ka methylal, trimethyl melamine molekole i prone i polycondensation reactions, hana non-linear cross-linked mole a me ka nalowale tanning. I kēia manawa, ʻo nā ala i hoʻohana nui ʻia a ʻike maopopo ʻia ʻo ia ke kāohi kūpono i ka pūʻulu hydroxymethyl e hōʻemi i kāna hana, e pale i ka condensation hou ma waena o nā molekala, a i ʻole e hoʻokomo i nā pūʻulu hydrophilic i loko o ka molecular structure e hoʻonui ai i ka solubility wai.
I kēia manawa, hoʻomākaukau nui ʻia ka melamine resin tanning agents ma ka home a ma waho e ka condensation o melamine, dicyandiamide wale nō a i hui pū ʻia me formaldehyde, a ua hoʻololi ʻia lākou e like me ka mea e pono ai.
Nā noi ma ka ʻoihana pepa:
No ka loaʻa ʻana o nā pūʻulu hydroxymethyl melamine formaldehyde resin, hiki iā ia ke hana i kahi ʻano etherified ma waena o nā pūpū fiber. ʻO kēia hoʻokuʻi ʻana ma waena o nā molekala like ʻole e hoʻopuka i ka wai, e hoʻomaʻamaʻa i ka pepa. No laila, hoʻohana nui ʻia ia ma ke ʻano he mea hoʻohui wai a me ka wai i ka ʻoihana pepa.
Anionic i hoʻololi ʻia melamine formaldehyde resin
ʻO ka nui o ka sulfonated melamine resin. I ka hoʻohālikelike, ʻoi aku ka maikaʻi o ka resin sulfamate-modified resin a hoʻohana nui ʻia. Hiki ke ho'ōla ʻia kēia ʻano huahana ma lalo o nā kūlana acidic, neutral, a alkaline, a hiki ke hoʻohui ʻia i ka slurry a hoʻohana ʻia i ka uhi. ʻO ka pilikia, ʻo ka hana ʻana o ka mea hoʻololi me formaldehyde, hiki mai ka ua a me ka crystallization, a paʻakikī ke kānana.
ʻO ka resin melamine formaldehyde i hoʻololi ʻia ka cationic
ʻO ka melamine resin i hoʻololiʻia me nā cationic reagents e like me triethanolamine, dimethylamine, a me nā mea'ē aʻe he uila maikaʻi, hiki ke hoʻopili kokeʻia e nā fibers, a hiki ke ho'ōlaʻia ma kahi kiʻekiʻe o ka pH waiwai. Hōʻalo ia i nā hopena ʻino o ka resin melamine-formaldehyde maʻamau i ka keʻokeʻo a me ka lōʻihi o ka pepa. I kēia manawa, ʻo ka noiʻi nui ma kēia kahua ma ka home a me nā ʻāina ʻē e hoʻohana i nā ʻona liʻiliʻi molekala, e like me ka methanol, butanol, a me nā mea ʻē aʻe, e like me nā mea etherifying a me kahi liʻiliʻi o nā mea hoʻololi cationic ma lalo o ka catalysis o ka p-toluene sulfonic acid e ālai i kā lākou mau pūʻulu ikaika a hoʻomaikaʻi i ka paʻa huahana. .
ʻO nā ʻano kumu nui e hōʻemi i ka ʻike o ka formaldehyde manuahi: ka hoʻohana ʻana i nā mea organik me ka hiki ke hoʻoheheʻe ʻia, e like me ka formic acid a me ka hydrogen peroxide, hiki ke hoʻoheheʻe i ka formaldehyde i CO2 a me ka wai. I ka wā o ka hoʻomākaukau ʻana i ka resin, ua hoʻohui ʻia nā mea hoʻonaninani formaldehyde e like me borax, propylene glycol, a me ka sodium bisulfite, a hoʻohana ʻia ka distillation vacuum.
Nā noi i ka ʻoihana uhi
ʻO ka melamine formaldehyde resin i hoʻololiʻia e ka etherification o nā mea waiʻona haʻahaʻa (e like me ka methanol, butanol, isobutane) i hoʻohana nuiʻia i kaʻoihana hoʻopili a hoʻohana nuiʻia ma keʻano he mea hoʻopili keʻa no nā uhi wai. Ma keʻano he mea maka no ka topcoats a me ka primers, hiki ke hanaʻia i loko o nā amino resins me nā alkyd resins, polyester resins, acrylic resins, epoxy resins, a me nā mea'ē aʻe, a hoʻohana nuiʻia i nā kaʻa kaʻa, nā lako, nā mea hana hale a me nāʻoihana'ē aʻe.
No ka ʻike hou aku e pili ana i ka SINOYQX modified melamine formaldehyde resin, e ʻoluʻolu e hoʻokaʻaʻike mai iā mākou ma o ka leka uila: [email protected] , a i ʻole e leka mai iā mākou ma: +86-28-8411-1861.
Hoʻopuka hou ʻia kekahi mau kiʻi a me nā kikokikona mai ka Pūnaewele, a no ka mea kākau kumu ke kuleana kope. Inā loaʻa kekahi hewa, e ʻoluʻolu e kelepona mai iā mākou e holoi.