Modified melamine formaldehyde guduro ne polymer samu ta hanyar dauki melamine da formaldehyde, kuma aka sani da melamine formaldehyde guduro ko melamine guduro.
Halayen jiki: Resin melamine formaldehyde da aka warke ba shi da launi kuma yana da haske, yana dawwama a cikin ruwan zãfi, kuma ana iya amfani da shi har ma a zafin 150°C. Yana da kaddarorin kashe kansa, halayen baka, da kyawawan halayen injiniya.
Kayayyakin sinadarai: Abubuwan da ake amfani da su sune melamine da 37% formaldehyde aqueous bayani. Matsakaicin molar formaldehyde zuwa melamine shine 2-3. Ana samar da lambobi daban-daban na masu maye gurbin N-hydroxymethyl a mataki ɗaya, sannan kuma a kara tattara su cikin resins na layi. Yanayin halayen sun bambanta, kuma nauyin kwayoyin samfurin ya bambanta. Yana iya zuwa daga mai narkewar ruwa zuwa da kyar mai narkewa a cikin ruwa, ko ma daskararrun da ba za a iya narkewa ba. Ƙimar pH yana da tasiri mai girma akan ƙimar amsawa. Maganin guduro da aka shirya a sama ba shi da sauƙin adanawa, kuma ana amfani da bushewar feshi da yawa a masana'antu don samar da ƙaƙƙarfan foda. Gudun melamine baya warkewa a zafin jiki. Gabaɗaya ana warkewa ta thermally a 130-150 ° C. Ƙara ƙaramin adadin acid don haɓaka ƙimar warkewa na iya ƙara yawan warkewa.
Aikace-aikace a cikin masana'antar fata: A cikin masana'antar fata, resin melamine shine abin da aka saba amfani dashi kafin tanning, sake tanning, da kuma ciko guduro, daga cikin abin da guduro na trimethyl melamine shine guduro amino da ake amfani da shi sosai. Amino resin yana da tsarin tanning kamar aldehyde tanning: prepolymer yana shiga cikin fata, kuma yayin da ƙimar pH ta ragu, prepolymer yana taɗa kai tsaye cikin ƙwayoyin cuta na takamaiman girman fata. Ta hanyar kwantar da mai aiki -NHCH2OH a cikin kwayoyin halitta tare da kungiyoyin amino akan sarkar peptide collagen, an kafa tsarin haɗin gwiwar haɗin gwiwa don cimma manufar tannins.
Saboda babban reactivity na methylal, trimethyl melamine kwayoyin suna da wuya ga polycondensation halayen, samar da wadanda ba mikakke-linked kwayoyin da kuma rasa tanning. A halin yanzu, hanyoyin da aka fi amfani da su kuma a bayyane su ne don toshe ƙungiyar hydroxymethyl yadda ya kamata don rage ayyukanta, hana ƙarin haɓakawa tsakanin ƙwayoyin cuta, ko shigar da ƙungiyoyin hydrophilic a cikin tsarin kwayoyin don ƙara narkewar ruwa.
A halin yanzu, ana shirya abubuwan tanning resin na melamine a gida da waje ta hanyar haɗakar melamine, dicyandiamide kadai ko gauraye da formaldehyde, kuma ana gyara su yadda ya kamata.
Aikace-aikace a masana'antar takarda:
Saboda resin melamine formaldehyde ya ƙunshi ƙungiyoyin hydroxymethyl, yana iya samar da wani tsari mai ƙyalƙyali tsakanin ɗigon fiber. Wannan haɗin kai tsakanin kwayoyin halitta daban-daban yana samar da ruwa, yana sa takarda ya zama m. Sabili da haka, ana amfani da shi a matsayin wakili mai ƙarfafa rigar da wakili na ruwa a cikin masana'antar takarda.
Anionic modified melamine formaldehyde guduro
Shi ne yafi sulfonated melamine guduro. A kwatancen, guduro-gyaran sulfmate ya fi kyau kuma ana amfani da shi sosai. Irin wannan samfurin za a iya warke a ƙarƙashin acidic, tsaka tsaki, ko alkaline yanayi, kuma za a iya ƙara zuwa slurry ko amfani a cikin shafi. Matsalar ita ce lokacin da mai gyara ya amsa tare da formaldehyde, hazo da crystallization suna faruwa, kuma yana da wuya a tacewa.
Resin melamine formaldehyde da aka gyara na Cationic
Melamine resin modified tare da cationic reagents kamar triethanolamine, dimethylamine, da dai sauransu yana da ingantaccen wutar lantarki, za a iya shafe shi da sauri ta fibers, kuma ana iya warkewa a mafi girma pH darajar. Yana guje wa mummunan tasirin melamine-formaldehyde resin na yau da kullun akan farin da dorewa na takarda. A halin yanzu, babban bincike a wannan fanni a gida da waje shi ne yin amfani da kananan kwayoyin barasa, irin su methanol, butanol, da dai sauransu, a matsayin etherifying jamiái da kuma wani karamin adadin cationic modifiers karkashin catalysis na p-toluene sulfonic acid don toshe su aiki kungiyoyin da kuma inganta samfurin kwanciyar hankali. .
Babban hanyoyin da za a rage abun ciki na formaldehyde kyauta sune: yin amfani da kwayoyin halitta tare da ikon oxidizing, irin su formic acid da hydrogen peroxide, wanda zai iya oxidize formaldehyde zuwa CO2 da ruwa. A lokacin tsarin shirye-shiryen resin, ana amfani da masu hana ruwa na formaldehyde irin su borax, propylene glycol, da sodium bisulfite, kuma ana amfani da distillation.
Aikace-aikace a cikin masana'antar sutura
Melamine formaldehyde resin modified by etherification na low-giya abubuwa (kamar methanol, butanol, isobutane) ana amfani da ko'ina a cikin shafi masana'antu da aka yafi amfani a matsayin giciye-linking wakili ga ruwa tushen coatings. A matsayin ɗanyen kayan da ake amfani da shi na rigunan riguna da kayan kwalliya, ana iya ƙirƙira shi cikin resins na amino tare da resin alkyd, resin polyester, resin acrylic, resin epoxy, da sauransu, kuma ana amfani da shi sosai a cikin motoci, kayan daki, kayan gida da sauran masana'antu.
Ƙarin bayani game da SINOYQX modified melamine formaldehyde resin, da fatan za a tuntuɓe mu ta imel: [email protected] , ko a yi mana magana a: +86-28-8411-1861.
Ana sake buga wasu hotuna da rubutu daga Intanet, kuma haƙƙin mallaka na ainihin marubucin ne. Idan akwai wani cin zarafi, da fatan za a tuntuɓe mu don sharewa.