Thickeners for latex Paint dole ne mai kyau jituwa tare da latex polymer mahadi, in ba haka ba za a yi wani karamin adadin rubutu a cikin shafi fim, da irreversible barbashi tara zai faru, sakamakon a rage danko da m barbashi size.Masu kauri za su canza cajin emulsion.Misali, masu kauri na cationic za su sami tasirin da ba za a iya jurewa ba akan emulsifiers anionic kuma suna haifar da lalata.Madaidaicin fenti na latex mai kauri dole ne ya sami kaddarorin masu zuwa:
1. Low sashi da kyau danko
2. Kyakkyawan kwanciyar hankali na ajiya, ba zai rage danko ba saboda aikin enzymes, kuma ba zai rage danko ba saboda canje-canje a cikin zafin jiki da darajar pH.
3. Kyakkyawan riƙewar ruwa, babu kumfa mai iska
4. Babu sakamako masu illa akan abubuwan fim ɗin fenti kamar juriya na gogewa, mai sheki, ikon ɓoyewa da juriya na ruwa
5. Babu flocculation na pigments
Fasaha mai kauri na fentin latex muhimmin ma'auni ne don inganta ingancin latex da rage farashi.Hydroxyethyl cellulose ne mai manufa thickener, wanda yana da multifunctional effects a kan thickening, stabilization da rheological gyara na latex Paint.
A cikin tsarin samar da fenti na latex, ana amfani da hydroxyethyl cellulose (HEC) azaman mai watsawa, mai kauri da mai dakatar da pigment don daidaita danko na samfurin, rage haɓakawa, sanya fim ɗin fenti mai santsi da santsi, kuma sanya fenti na latex ya fi tsayi. .Kyakkyawan rheology, yana iya jure babban ƙarfi mai ƙarfi, kuma yana iya samar da matakan daidaitawa mai kyau, juriya da juriya da daidaiton launi.A lokaci guda kuma, HEC yana da kyakkyawan aiki, kuma fentin latex da aka yi da kauri tare da HEC yana da pseudoplasticity, don haka gogewa, jujjuyawar, cikawa, fesa da sauran hanyoyin gini suna da fa'idodin ceton aiki, ba sauƙin sharewa, sag, da ƙarancin splashing.HEC yana da kyakkyawan ci gaban launi.Yana da kyakkyawan rashin daidaituwa ga yawancin masu launi da masu ɗaure, wanda ke sa fenti na latex ya sami daidaiton launi da kwanciyar hankali.Ƙarfafawa don aikace-aikace a cikin abubuwan da aka tsara, shi ne ether maras ionic.Don haka, ana iya amfani da shi a cikin kewayon pH mai faɗi (2 ~ 12), kuma ana iya haɗe shi tare da abubuwan da aka gyara a cikin fenti na latex gabaɗaya kamar su pigments masu amsawa, ƙari, salts mai narkewa ko electrolytes.
Babu wani tasiri mai tasiri akan fim ɗin shafi, saboda bayani na HEC mai ruwa yana da halaye na yanayin tashin hankali na ruwa, ba shi da sauƙi don kumfa a lokacin samarwa da ginawa, kuma yanayin ramukan volcanic da pinholes ya ragu.
Kyakkyawan kwanciyar hankali na ajiya.A lokacin ajiya na dogon lokaci, ana iya kiyaye dispersibility da dakatar da pigment, kuma babu matsala na iyo launi da blooming.Akwai ƙaramin ruwa a saman fenti, kuma lokacin da zafin jiki ya canza sosai.Dankowar sa har yanzu yana da inganci.
HEC na iya ƙara ƙimar PVC (ƙarar ƙarar launi) ƙaƙƙarfan abun ciki har zuwa 50-60%.Bugu da kari, da surface shafi thickener na ruwa tushen fenti kuma iya amfani da HEC.
A halin yanzu, masu kauri da ake amfani da su a matsakaicin gida da manyan fenti na latex ana shigo da su HEC da acrylic polymer (ciki har da polyacrylate, homopolymer ko copolymer emulsion thickeners na acrylic acid da methacrylic acid) masu kauri.
Hydroxyethyl cellulose za a iya amfani da
1. A matsayin mai watsawa ko manne mai kariya
Gabaɗaya, ana amfani da HEC tare da danko na 10-30mPaS.HEC wanda za a iya amfani da shi har zuwa 300mPa · S zai sami sakamako mafi kyau na watsawa idan an yi amfani da shi a hade tare da anionic ko cationic surfactants.Matsakaicin adadin shine gabaɗaya 0.05% na adadin monomer.
2. A matsayin mai kauri
Yi amfani da 15000mPa.Matsakaicin ma'auni na babban danko HEC sama da s shine 0.5-1% na jimlar yawan fenti na latex, kuma ƙimar PVC na iya kaiwa kusan 60%.Yi amfani da HEC na kusan 20Pa,s a cikin fenti na latex, kuma aikin fentin latex shine mafi kyau.Farashin kawai amfani da HEC sama da 30O00Pa.s ya yi ƙasa.Duk da haka, abubuwan daidaitawa na fenti na latex ba su da kyau.Daga ra'ayi na ingancin buƙatun da rage farashin, yana da kyau a yi amfani da matsakaici da babban danko HEC tare.
3. Hanyar haɗuwa a cikin launi na latex
Za a iya ƙara HEC da aka yi amfani da shi a cikin busassun foda ko manna.Ana ƙara busassun foda kai tsaye zuwa niƙa mai launi.pH a wurin ciyarwa ya kamata ya zama 7 ko ƙasa.Ana iya ƙara abubuwan alkali irin su Yanbian dispersant bayan an jika HEC kuma an tarwatsa gabaɗaya.Abubuwan da aka yi da HEC yakamata a haɗa su cikin slurry kafin HEC ta sami isasshen lokaci don yin ruwa da ba da damar yin kauri zuwa yanayin da ba za a iya amfani da shi ba.Hakanan yana yiwuwa a shirya ɓangaren litattafan almara na HEC tare da ethylene glycol coalescing jamiái.
4. Anti-mold na latex fenti
HEC mai narkewar ruwa za ta haɓaka lokacin da ake hulɗa da ƙwayoyin cuta waɗanda ke da tasirin musamman akan cellulose da abubuwan da suka samo asali.Bai isa ba don ƙara abubuwan kiyayewa zuwa fenti kadai, duk abubuwan da aka gyara dole ne su zama marasa enzyme.Motar samar da fenti na latex dole ne a kiyaye shi da tsabta, kuma duk kayan aikin dole ne a haifuwa akai-akai tare da tururi 0.5% formalin ko O.1% mercury solution.
Lokacin aikawa: Dec-26-2022