Melamine Structure
Melamine formula: C3H6N6, feem ntau hu ua melamine thiab protein, lub npe "1,3,5-triazine-2,4,6-triamino" los ntawm IUPAC, yog triazine nitrogen-muaj heterocycle Organic compounds yog siv los ua chemical raw khoom. Nws yog dawb monoclinic siv lead ua, yuav luag tsis muaj ntxhiab, me ntsis soluble hauv dej (3.1g / L ntawm chav tsev kub), soluble hauv methanol, formaldehyde, acetic acid, kub ethylene glycol, glycerin, pyridine, thiab lwm yam, insoluble hauv acetone, ethers, thiab tsim kev puas tsuaj rau lub cev Kev phom sij thiab tsis siv rau hauv kev ua zaub mov lossis khoom noj khoom haus ntxiv. Melamine yog lub trimer ntawm cyanamide. Cov resin ua los ntawm nws tso ib tug loj npaum li cas ntawm nitrogen thaum nws yog rhuab thiab decomposes, yog li nws yuav siv tau raws li ib tug nplaim hluav taws. Nws kuj yog ib qho metabolite ntawm cov tshuaj tua kab ciprofloxacin hauv cov tsiaj thiab nroj tsuag.
Dab tsi ntawm cov yas yog melamine?
Melamine CAS 108-78-1tsis yog hom yas, tab sis nws tuaj yeem siv los tsim cov melamine resin, uas yog hom thermosetting yas. Melamine CAS 108-78-1 cob yog tsim los ntawm combining melamine nrog formaldehyde. Nws yog lub npe hu rau nws cov cua kub tsis kam, durability, thiab khawb tsis kam, ua rau nws haum rau ntau yam kev siv xws li chav ua noj, tais diav, laminates, thiab cov hniav zoo nkauj. Melamine resin feem ntau yog siv los ua cov txheej los yog cov khoom siv hauv cov ntaub ntawv sib xyaw es tsis yog cov yas yas.
melamine yog dab tsi?
Melamine CAS 108-78-1 feem ntau yog tsim los ntawm urea, ib qho chaw muab los ntawm ammonia thiab carbon dioxide. Nws dhau los ua cov txheej txheem tshuaj hu ua condensation polymerization, qhov twg ntau cov urea molecules hnov mob nrog formaldehyde los ua melamine resin. Cov resin no yog tsim los ntawm kev rov ua haujlwm ntawm melamine molecules cross-linked nrog formaldehyde molecules. Cov khoom tsim tau, melamine resin, yog tom qab molded thiab kho kom tsim tau ntau yam khoom
100% melamine yog dab tsi?
"100% melamine" feem ntau yog hais txog cov khoom uas yog ua los ntawm melamine resin tag nrho yam tsis muaj cov khoom ntxiv lossis cov khoom ntxiv. Cov khoom no feem ntau raug qhuas rau lawv cov kav ntev, khawb tsis kam, thiab kub ua haujlwm, ua rau lawv tsim nyog siv rau hauv ntau yam kev siv, xws li cov khoom siv hauv chav ua noj, khoom noj hmo, thiab cov hniav zoo nkauj. Txawm li cas los xij, nws tseem ceeb heev uas yuav tsum nco ntsoov tias lo lus "100% melamine" tsis txhais hais tias cov khoom yog melamine ntshiab; es, nws qhia tau hais tias cov khoom siv nyob rau hauv cov khoom yog nkaus melamine resin tsis muaj lwm yam ntaub ntawv sib xyaw.