The madzi ofotokoza (VOC & HAPs) ❖ kuyanika kwaulere akhoza kukonzekera madzi aliphatic epoxy ndi yopapatiza polymerized capropone polyols ndipo angagwiritsidwe ntchito ndi zipangizo ochiritsira ndipo ali ndi kuthekera m'malo zokutira ufa.Kodi mfundo chidwi pokonzekera madzi aliphatic epoxy liquid zokutira?Chinese epoxy resin industry association apanga mawu oyamba mwapadera masiku angapo apitawo.
Ndalama zoyambira zida zofunika pa mzere watsopano wokutira ufa zitha kupewedwa pogwiritsa ntchito zida zopopera zamadzimadzi.Zovala izi zimatha kusinthidwa ndikuzitsitsa ndi madzi kapena kukulitsa zokutira zokhala ndi madzi ndi zowuma za cellulose. aliphatic, kuchitapo kanthu ndi asidi mofulumira, koma ndi amine/amides epoxy machiritso omwe amagwiritsidwa ntchito kawirikawiri samachitapo kanthu, alibe klorini, kukhuthala kwa 350 centipoise ndi diglycidyl ether wa bisphenol A (bpa) utomoni ngati 11000 centipoise, pa nthawi yomweyo. ilinso kwambiri nyengo resistance.The ntchito otsika mamasukidwe akayendedwe aliphatic epoxy mu cationic UV zokutira wakhala kwambiri kuchuluka.Pakhala pali malipoti ambiri pakukonzekera ndi katundu wa mtundu uwu wa 100% zokutira olimba popanda "VA", koma pali mabuku ochepa mwatsatanetsatane pa ntchito yake mu matenthedwe kuchiritsa zokutira. kugwiritsidwa ntchito kwa matenthedwe machiritso dongosolo, koma awiriwa alinso osiyana monga UV ❖ kuyanika nthawi zambiri si kupopera mbewu mankhwalawa, motero kumanga mamasukidwe akayendedwe ndi apamwamba kuposa kupopera mbewu mankhwalawa matenthedwe ❖ kuyanika, mu kuphika mtundu cationic ❖ kuyanika madzi angagwiritsidwe ntchito ngati VOC diluent.
Ma polyols a Cepolactone akhala akugwiritsidwa ntchito ngati zosungunulira zopangira zosungunulira ndipo zimatha kufulumizitsa kuchiritsa kwa zokutira za cationic UV.Magulu a hydroxyl a polyols awa mu zokutira za cationic UV sangathe kufulumizitsa machiritso, komanso amachititsa kuti munthu azitha kuchiritsa kutentha kwa chinyezi. wa polyols kumawonjezera kulolerana kwa madzi, kuti madzi angagwiritsidwe ntchito ngati VOC wopanda woonda woonda mu utoto formulations wapangidwa aliphatic epoxies ndi polyols, amene kwenikweni mkulu olimba zokutira organic kuchepetsedwa ndi water.Water dilution ali ndi ubwino ziwiri: otsika mamasukidwe akayendedwe mu kusowa kwa VOC, komanso kugwiritsa ntchito miyeso ya penti yodziwika bwino komanso yodziwika bwino yamadzi kuti mupewe kupachika ndi kuwongolera kwa rheological.Popeza chigawo chilichonse mu chilinganizo chimakhala chosakanikirana pang'ono ndi madzi, kuchuluka kwa madzi omwe angatengedwe kumakhala kochepa.Chisamaliro chiyenera kutengedwa kuti musawonjezere madzi ochulukirapo kuti apangitse kupatukana kwa gawo.
Celulosic thickeners ndi ogwira ❖ kuyanika madzi, koma sizikudziwika ngati iwo akugwira 100% olimba, madzi kuchepetsedwa aliphatic epoxy zokutira. Ntchito oyambirira anasonyeza kuti madzi kuchepetsedwa 100% olimba epoxides anali thixotropic pamene anayeza ndi Brookfield viscometer. .Kufufuza kwa mitundu yosiyanasiyana ya thickeners kumasonyeza kuti ma cellulose thickeners ali ndi katundu wabwino kwambiri.Akatenthedwa kufika 40 ~ 60 ℃, maonekedwe abwino kwambiri a filimu amatha kupezeka pogwiritsa ntchito mfuti ya spray.Otsika yomanga kutentha kumapangitsa filimu anachiritsa kutulutsa zambiri lalanje peel.China epoxy utomoni makampani mgwirizano akatswiri ananena kuti mwayi waukulu wa ❖ kuyanika ufa wokutidwa ndi dzuwa, mkulu dzuwa makamaka kudzera kuchira ufa kukwaniritsa, kuti ❖ kuyanika ufa ofanana ndi mtundu uwu wa ❖ kuyanika madzi amafunikira njira ina kuti achire ntchentche paint.Poti utoto chiphunzitso chafotokozedwa pano mulibe zosungunulira organic kuti kuchira mosavuta, madzi otayika mu ndondomeko kuchira akhoza kusinthidwa mosavuta ndi kuyeza madutsidwe magetsi ngati n'koyenera, kupulumutsa mphamvu ndi. kumafuna kutentha kochepa kophika poyerekeza ndi kutentha kwakukulu kophika komwe kumafunika kuti kupaka ufa. Njira ina yomwe ikuyesedwa ndi kupopera anhydrous epoxies, polyols, ndi pigments ndi njira ya "Unicarb", yomwe imakhala yogwira mtima kwambiri kuposa kupaka ufa.Ngati palibe zokutira zaulere za VOC zomwe zimafunikira, ingowonjezerani zosungunulira ku fomula.
About chilinganizo cholemba, China epoxy utomoni makampani Association akatswiri anati, chifukwa cationic machiritso chifukwa zamchere adzasiya kuchiritsa, kotero zina zonse ndi rheological kulamulira wothandizila sayenera muli zamchere, inki zamchere ndi amine ankachitira inki adzakhala ziletsa kuchiritsa.Alkalescent ngati damine inki adzakhala komanso ziletsa cationic kuchiritsa, inki zamchere ndi zina mu cationic kuchiritsa zokutira sangathe ntchito, kuchiritsa zimadalira chothandizira FC-520 mu pang'ono amine sealant volatilization, ngati filimu ndi wandiweyani kapena ng'anjo si mpweya wokwanira, amine. sangakhoze kuchotsedwa kwathunthu ku filimu ndi ziletsa kuchiritsa.Kukhuthala kuchulukana ndi kuwonjezeka polyols nthambi digiri kuwonjezeka: dibasic mowa kuposa atatu kapena anayi yuan ndalama m'munsi mamasukidwe akayendedwe utoto, mowa ndi glycol nawo kufunika kuonjezera kuchuluka kwa epoxy mtengo ( R) ikhoza kupezedwa ndi zokutira zolimba, mlingo waukulu wa epoxy dzimbiri ukhoza kusinthidwa, kuwonjezeka kwa mlingo wothandizila kumatha kufulumizitsa kuthamanga kwa machiritso komanso kuchepetsa dzimbiri, chiŵerengero cha molar cha epoxy ndi hydroxyl R chimakhudza kwambiri kuthamanga kwa machiritso. .
Komabe, alicyclic epoxy ndi caprolactone polyols ndi otsika mamasukidwe akayendedwe komanso ngakhale palibe VOC ❖ kuyanika, ❖ kuyanika akhoza kuchepetsedwa ndi madzi kupopera mamasukidwe akayendedwe, mapadi thickener angapereke madzi kuchepetsa 100% olimba epoxy ndi polyols ❖ kuyanika kuti bwino kupewa sagging, dongosolo kuchiritsa liwiro. zimaganiziridwa ndi mitundu yotsatirayi: chiŵerengero cha molar cha epoxy ndi hydroxyl, mowa wambiri ndi epoxy magwiridwe antchito, mlingo wa chothandizira ndi kutentha kwa machiritso, chilinganizocho chingagwiritsidwe ntchito mosavuta pokonzekera utoto, chifukwa mtundu uwu wa ❖ kuyanika kwa cationic. kuchiritsa utoto woyambira ndi gawo lapansi kumatha kulepheretsa kuchiritsa.
Nthawi yotumiza: Apr-06-2021