Mvura-yakavakirwa (VOC & HAPs) yemahara coating inogona kugadzirirwa kubva kumvura aliphatic epoxy uye yakamanikana polymerized capropone polyols uye inogona kushandiswa neyakajairwa midziyo uye ine mukana wekutsiva upfu coatings.Ndezvipi pfungwa dzekutarisisa mukugadzirira kwemvura. aliphatic epoxy liquid coatings?Chinese epoxy resin industry association nyanzvi yakaita sumo yakakosha mazuva mashoma apfuura.
Iyo yakakosha midziyo yekudyara inodiwa kune nyowani hupfu yekupotera mutsara inogona kudziviswa nekushandisa yechinyakare mvura yekupotera michina yekupfapfaidza.Aya machira anogona kugadziridzwa nekuadonhedza nemvura kana nekukora mvura-based coatings ine cellulose thickeners.Neyakajairika diglycidyl ether ye bisphenol A (bpa) resin, alicyclic epoxy ine zvinotevera zvakati wandei: musiyano pakati peA seketani huru. Aliphatic, reaction with acid nekukurumidza, asi neamine/amides epoxy curring agents anowanzo shandiswa haaite, haana chlorine, viscosity ye350 centipoise uye diglycidyl ether yebisphenol A (bpa) resin se11000 centipoise, panguva imwe chete. inewo yakanakisa yemamiriro ekunze resistance.The application of low viscosity aliphatic epoxy mu cationic UV coatings yakawedzerwa zvakanyanya.Pakave nemishumo yakawanda pamusoro pekugadzirira uye zvimiro zverudzi urwu rwe100% yakasimba coating isina "VA", asi kune mashoma ane udzame zvinyorwa pamusoro pekushandiswa kwayo mukupisa kurapa coatings.In musimboti, cationic UV coating formula yehunyanzvi ruzivo inogona zvakare Inoshandiswa pakupisa kurapa sisitimu, asi iwo maviri zvakare akasiyana akadai seUV coating kazhinji haisi kupfapfaidza kuvaka, nekudaro viscosity yekuvaka yakakwira pane kupfapfaidza kupisa kwekurapa kwekupotera, mukubika mhando cationic coating mvura inogona kushandiswa seVOC diluent.
Macepolactone polyols akashandiswa seanoshanda diluents ekunyungudutsa-based coatings uye anogona kukurumidza kurapa kweiyo cationic UV machira.Mapoka ehydroxyl emapolyols aya mune cationic UV coatings haangogone kukurumidza kupora, asi zvakare anotungamirira kune imwe yekurapa senitivity kune humidity.Mukupisa kunopisa coating nekuda kwehunyoro hwakaderera muchoto, hunyoro hakutadzisi kurapa.Kuvapo. ye polyols inowedzera kushivirira kwemvura, kuitira kuti mvura inogona kushandiswa seVOC-isina yakaonda mukugadzirwa kwependi inoumbwa nealiphatic epoxies uye polyols, izvo chaizvoizvo zvakakwirira zvakasimba organic coatings yakasvibiswa nemvura. kusavapo kweVOC, uye kushandiswa kwemaitiro akajairika uye anozivikanwa ependi emvura ekudzivirira kusungirirwa uye rheological control.Sezvo chikamu chega chega chega chega chinosanganiswa nemvura, huwandu hwemvura hunogona kubatwa hushoma.Kuchengetedza kunofanira kutorwa kudzivirira kuwedzera mvura yakawandisa kukonzera kuparadzaniswa kwechikamu.
Cellulosic thickeners inoshanda mumvura-based coatings, asi hazvisi pachena kana inoshanda mu100% yakasimba, mvura-diluted aliphatic epoxy coatings.Basa rekutanga rakaratidza kuti mvura-yakasvibiswa 100% yakasimba epoxides yaiva thixotropic kana yakayerwa neBrookfield viscometer. .Ongororo yemhando dzakasiyana-siyana dzema thickeners dzinoratidza kuti cellulose thickeners vane zvakanakisisa comprehensive properties.Kana inopisa kusvika 40 ~ 60℃, kutaridzika kwakanakisisa kwefirimu kunogona kuwanikwa nekushandisa pfuti yepfapfaidzo.Iyo yakaderera tembiricha yekuvaka inoita kuti firimu rakarapirwa ribudise peel yeorenji.China epoxy resin industry association nyanzvi dzakataura kuti mukana mukuru wekuputira upfu wakaputirwa nehunyanzvi hwepamusoro, kunyatsoshanda zvakanyanya kunoitwa kuburikidza nekudzoreredza hupfu kuti hubudirire, kusvika pakuputira hupfu zvakaenzana rudzi urwu rwekuputira kwemvura kunoda imwe nzira yekudzorera nhunzi pendi.Sezvo pendi yekugadzira inotsanangurwa pano isina organic solvents kuitira kuti zvive nyore kupora, mvura yakarasika mukugadzirisa maitiro inogona kugadziriswa nyore nyore nekuyera conductivity yemagetsi kana zvichidiwa, kuchengetedza simba ne zvinoda kudzikira kwekushisa kwekubikira kana zvichienzaniswa nekupisa kwepamusoro-soro kunodiwa pakuputira upfu.Imwe sarudzo iri kuongororwa ndeyekupfapfaidza anhydrous epoxies, polyols, uye pigments ne "Unicarb" nzira, iyo inoshanda zvakanyanya kupfuura poda coating.Kana pasina VOC yemahara coating inodiwa, ingo wedzera zvinonyungudutsa kune formula.
Nezve formula note, China epoxy resin industry association nyanzvi dzakati, pakurapa cationic nekuti alkali ichamira kurapa, saka zvese zvinowedzera uye rheological control agents hazvifanirwe kunge zvine alkaline, alkaline pigments uye amine yakarapwa pigments inodzivirira kurapa. uyewo inhibit cationic kurapa, alkaline pigments uye additives mu cationic kurapa coatings haigoni kushandiswa, kurapa kunoenderana catalyst FC-520 mune shoma shoma amine sealant volatilization, kana firimu rakanyanya gobvu kana ovheni isina mhepo, iyo amine. haigoni kubviswa zvachose kubva mufirimu uye inhibit curing.Viscosity yakawedzera nekuwedzera kwe polyols branched dhigirii kuwedzera: dibasic doro pane matatu kana mana yuan mari yakaderera viscosity yepende, doro uye glycol kugoverana kudiwa kwekuwedzera chiyero che epoxy value ( R) inogona kuwanikwa neyakaomarara bhachi, yakakwira dosage ye epoxy corrosion inogona kuvandudzwa, kuwedzera kweiyo catalyst dosage inogona kusimudzira kukurumidza kurapa asi zvakare inogona kuderedza kukora, iyo molar ratio ye epoxy uye hydroxyl R ine simba rakakura pakumhanya kwekurapa. .
Zvakadaro, alicyclic epoxy ine caprolactone polyols yakaderera viscosity uye kunyangwe isina VOC coating, iyo yekupfeka inogona kuderedzwa nemvura kupfapfaidza viscosity, cellulose thickener inogona kupa mvura dilute ye100% yakasimba epoxy uye polyols coating kudzivirira zvinobudirira kudonha, system yekurapa kukurumidza. inosarudzwa nemhando dzinotevera: iyo molar ratio ye epoxy uye hydroxyl, multivariate doro uye epoxy mashandiro, chiyero cheiyo catalyst uye tembiricha yekurapa, iyo fomula inogona kushandiswa nyore mukugadzira pendi, nekuti rudzi urwu rwekupfekedza cationic. kurapa yakakosha pendi uye substrate inogona kutadzisa kurapa.
Nguva yekutumira: Kubvumbi-06-2021