水性環氧樹脂塗料的研究進展
發布時間:2014-08-09
環氧樹脂水性化是指將環氧樹脂以微粒、液滴或膠體形式分散在水中而配得穩定的分散體係。國外自20世紀50niandaijiukaishilehuanyangshuzhideshuixinghuayanjiu,qizhongjianghuanyangshuzhizhichengruyeshizuichangyongdeyanjiutujing。shuixinghuanyangshuzhipeiheguhuajizuiweiguangfandeyongtushiyongzuotuliao。
1 水性環氧樹脂塗料的分類
根據所用環氧樹脂物理狀態的不同可將水性環氧樹脂塗料分成以下兩類,這是比較經典的分類方法:
1.1 Ⅰ型水性環氧樹脂體係
Ⅰ型水性環氧樹脂體係由低分子液體環氧樹脂和水性環氧固化劑組成。低分子液體環氧樹脂通常為雙酚A型液體樹脂, 也可用雙酚F型環氧樹脂部分或全部取代雙酚A型(xing)環(huan)氧(yang)樹(shu)脂(zhi),並(bing)采(cai)用(yong)各(ge)種(zhong)活(huo)性(xing)稀(xi)釋(shi)劑(ji)來(lai)調(tiao)節(jie)環(huan)氧(yang)樹(shu)脂(zhi)的(de)粘(zhan)度(du)和(he)固(gu)化(hua)後(hou)塗(tu)膜(mo)的(de)交(jiao)聯(lian)密(mi)度(du)。這(zhe)類(lei)體(ti)係(xi)中(zhong)的(de)環(huan)氧(yang)樹(shu)脂(zhi)一(yi)般(ban)預(yu)先(xian)不(bu)乳(ru)化(hua),而(er)由(you)水(shui)性(xing)環(huan)氧(yang)固(gu)化(hua)劑(ji)在(zai)使(shi)用(yong)前(qian)混(hun)合(he)乳(ru)化(hua),因(yin)而(er)這(zhe)類(lei)固(gu)化(hua)劑(ji)必(bi)須(xu)既(ji)是(shi)交(jiao)聯(lian)劑(ji)又(you)是(shi)乳(ru)化(hua)劑(ji)。水(shui)性(xing)環(huan)氧(yang)固(gu)化(hua)劑(ji)合(he)成(cheng)時(shi)是(shi)以(yi)多(duo)胺(an)為(wei)基(ji)礎(chu),通(tong)過(guo)在(zai)其(qi)分(fen)子(zi)中(zhong)引(yin)入(ru)具(ju)有(you)表(biao)麵(mian)活(huo)性(xing)作(zuo)用(yong)的(de)分(fen)子(zi)鏈(lian)段(duan),使(shi)其(qi)成(cheng)為(wei)兩(liang)親(qin)性(xing)分(fen)子(zi),能(neng)夠(gou)很(hen)好(hao)地(di)分(fen)散(san)或(huo)溶(rong)解(jie)在(zai)水(shui)中(zhong),從(cong)而(er)對(dui)低(di)分(fen)子(zi)量(liang)的(de)液(ye)體(ti)環(huan)氧(yang)樹(shu)脂(zhi)具(ju)有(you)良(liang)好(hao)的(de)乳(ru)化(hua)作(zuo)用(yong)。
由於液體環氧樹脂具有良好的可施工性,無需外加成膜助劑就可成膜,因而I型體係通常配成零VOC體係。但是I型(xing)體(ti)係(xi)采(cai)用(yong)的(de)樹(shu)脂(zhi)是(shi)低(di)分(fen)子(zi)量(liang)的(de)液(ye)體(ti)環(huan)氧(yang)樹(shu)脂(zhi),在(zai)水(shui)分(fen)蒸(zheng)發(fa)後(hou)仍(reng)需(xu)要(yao)經(jing)過(guo)一(yi)定(ding)的(de)化(hua)學(xue)交(jiao)聯(lian)反(fan)應(ying)時(shi)間(jian)才(cai)能(neng)達(da)到(dao)表(biao)幹(gan),因(yin)而(er)該(gai)體(ti)係(xi)幹(gan)性(xing)較(jiao)差(cha),通(tong)常(chang)需(xu)要(yao)6小時以上才能達到表幹。
Ixingtixicaiyongguhuajilairuhuayetihuanyangshuzhi,suodedaodefensanxiangweilizhongtongshihanyouhuanyangshuzhiheguhuaji,yetihuanyangshuzhifuhanhuanyangji,daozhitixidezhandusuigezhishijiandeyanchangerkuaisuzengjia,biaoxianweishiyongqiduan,yuewei1~2xiaoshi,bingqiezaishiyongqifanweineitixiliubianxingnengyebuwending。caiyongyetihuanyangshuzhiguhuadetumojiaolianmidujiaogao,xingchenghoudetumoyingduhengao,danrourenxinghekangchongxingnengjiaocha,yibanshihezuoweidipingtuliao,ruoyongzuojinshufangfutuliaozecuixingtaida。
1.2 II型水性環氧樹脂體係
該體係采用高分子量固體雙酚A型環氧樹脂。製備高分子量水性環氧樹脂乳液必須要求特殊的高速分散設備,並且在加熱和添加少量溶劑的條件下才能製得粒徑較小、粒(li)子(zi)分(fen)布(bu)較(jiao)窄(zhai)的(de)乳(ru)液(ye)。同(tong)時(shi)要(yao)得(de)到(dao)穩(wen)定(ding)的(de)高(gao)分(fen)子(zi)量(liang)水(shui)性(xing)環(huan)氧(yang)樹(shu)脂(zhi)乳(ru)液(ye),需(xu)在(zai)其(qi)分(fen)子(zi)中(zhong)引(yin)入(ru)具(ju)有(you)表(biao)麵(mian)活(huo)性(xing)作(zuo)用(yong)的(de)親(qin)水(shui)鏈(lian)段(duan),在(zai)引(yin)入(ru)這(zhe)種(zhong)鏈(lian)段(duan)後(hou),交(jiao)聯(lian)形(xing)成(cheng)的(de)網(wang)鏈(lian)分(fen)子(zi)量(liang)有(you)所(suo)提(ti)高(gao),交(jiao)聯(lian)密(mi)度(du)下(xia)降(jiang),並(bing)且(qie)親(qin)水(shui)鏈(lian)段(duan)多(duo)為(wei)含(han)醚(mi)鍵(jian)的(de)碳(tan)鏈(lian),所(suo)以(yi)對(dui)固(gu)化(hua)後(hou)塗(tu)膜(mo)有(you)一(yi)定(ding)的(de)增(zeng)韌(ren)作(zuo)用(yong),可(ke)配(pei)製(zhi)柔(rou)韌(ren)性(xing)好(hao)的(de)防(fang)腐(fu)蝕(shi)塗(tu)料(liao)。由(you)於(yu)環(huan)氧(yang)樹(shu)脂(zhi)已(yi)預(yu)先(xian)配(pei)成(cheng)乳(ru)液(ye),不(bu)需(xu)要(yao)水(shui)性(xing)環(huan)氧(yang)固(gu)化(hua)劑(ji)再(zai)對(dui)環(huan)氧(yang)樹(shu)脂(zhi)進(jin)行(xing)乳(ru)化(hua),因(yin)而(er)固(gu)化(hua)劑(ji)隻(zhi)需(xu)具(ju)有(you)交(jiao)聯(lian)劑(ji)的(de)功(gong)能(neng)。
II型水性環氧樹脂塗料塗膜後,一旦水分蒸發,即使環氧樹脂還未交聯固化也已成固體狀態,達到表幹的要求,因而Ⅱ型水性環氧樹脂塗料的表幹時間較Ⅰxingdedadasuoduan。youyuguhuafanyingzhizaishuixinghuanyangguhuajifenzizhongdeanjiyuhuanyangshuzhifenzizhongdehuanyangjizhijianfanying,ergaofenzilianghuanyangshuzhidefanyinghuoxingjiaodifenzilianghuanyangshuzhixiao,bingqiefensanxiangweilineibuzhihanyouhuanyangshuzhi,guhuajifenzibixucongshuixiangzhongqianyidaohuanyangshuzhiweilibiaomianjinerkuosandaoweilineibucainengfanying,yinciⅡ型水性環氧樹脂體係的適用期較Ⅰ型的長,一般為6-8小時,但同時也造成塗膜的硬度增加緩慢。
IIxingshuixinghuanyangshuzhitixisuoyongdeguhuajishishuirongxingde,danglianggezufenhunhehou,huanyangshuzhiyiweilixingshifensanzaihuanyangguhuajishuirongyezhong,gaitixidezhanduzhuyaoyoushuixiangdezhandujueding。suizhegezhishijiandeyanchang,shuixinghuanyangguhuajifenzicongshuixiangbuduanxianghuanyangshuzhiweilibiaomianjiqineibukuosan,zhishishuixiangzhongdeguhuajinongdubuduanxiajiang,hongguanshangjiubiaoxianweitixidezhandubuduanjiangdi。danghuanyangshuzhiweilibiaomiandebiaoguanzhanduzengdadaoyidingchengdushi,guhuajifenzixiangqineibudekuosansuduyousuojianman,tixidezhanduyejiujibenbaochibubian。zaigezhiqijian,guhuajifenzihehuanyangshuzhibuduanfanyingzhishijuhewudeMFTbuduantigaozhidaotuliaobunengchengmo。yineryongtixizhandusuigezhishijiandebianhualaiquedingshuixinghuanyangshuzhitixideshiyongqishibukekaode,eryingxuanzebiedetezhengcanshu,rutumoguangzedu、玻璃化溫度等等。
IIxingtixidezuidaquedianshichengmoxingnengjiaocha,zheshiyinweiguhuajifenzishouxianhehuanyangshuzhifensanxianglizidebiaomianjiechufashengguhuafanying,suizheguhuafanyingdejinxing,huanyangshuzhifensanxiangdefenzilianghebolihuawenduzhujiantigao,shideguhuajifenzixianghuanyangshuzhifensanxianglizineibudekuosansuduzhujianbianman,zhejiuyiweizhehuanyangshuzhifensanxianglizineibujinxingdeguhuafanyingjiaoqibiaomiandeshao,neibujiaolianmiduyejiaodi。tongshisuizheguhuafanyingdejinxing,huanyangshuzhifensanxianglizizhujianbianying,lizizhijianyehennanxianghuzuoyongerningjiechengmo。tumozhongcunzaihuanyangshuzhiweiquheguhuajiweiqu,II型水性環氧樹脂塗料很難形成均相、完全固化的塗膜。為了解決固體環氧流動性差和改善成膜,需加入5-10%的醇醚類溶劑和增塑劑來改善成膜。
2 水性環氧樹脂的製備方法
水性環氧樹脂通常是指環氧樹脂以微粒、液滴或膠體形式分散於水相中所形成的乳液、水分散體或水溶液,三者之間的區別在於環氧樹脂分散相的粒徑不同。根據製備方法的不同,環氧樹脂水性化有以下四種方法:機械法、化學改性法、相反轉法和固化劑乳化法等。
2.1 機械法
機械法即直接乳化法,可用球磨機、膠體磨、均氏器等將固體環氧樹脂預先磨成微米級的環氧樹脂粉末,然後加入乳化劑水溶液,再通過機械攪拌將粒子分散於水中;或huo將jiang環huan氧yang樹shu脂zhi和he乳ru化hua劑ji混hun合he,加jia熱re到dao適shi當dang的de溫wen度du,在zai激ji烈lie的de攪jiao拌ban下xia逐zhu漸jian加jia入ru水shui而er形xing成cheng乳ru液ye。用yong機ji械xie法fa製zhi備bei水shui性xing環huan氧yang樹shu脂zhi乳ru液ye的de優you點dian是shi工gong藝yi簡jian單dan,所suo需xu乳ru化hua劑ji用yong量liang較jiao少shao,但dan乳ru液ye中zhong環huan氧yang樹shu脂zhi分fen散san相xiang微wei粒li尺chi寸cun較jiao大da,粒li子zi形xing狀zhuang不bu規gui則ze且qie尺chi寸cun分fen布bu較jiao寬kuan,所suo配pei得de的de乳ru液ye穩wen定ding性xing差cha,粒li子zi之zhi間jian容rong易yi相xiang互hu碰peng撞zhuang而er發fa生sheng凝ning結jie現xian象xiang,並bing且qie該gai乳ru液ye的de成cheng膜mo性xing能neng也ye欠qian佳jia。當dang然ran提ti高gao攪jiao拌ban分fen散san時shi的de溫wen度du可ke以yi促cu進jin乳ru化hua劑ji分fen子zi在zai環huan氧yang樹shu脂zhi微wei粒li表biao麵mian更geng為wei有you效xiao地di吸xi附fu,使shi得de環huan氧yang樹shu脂zhi微wei粒li能neng較jiao為wei穩wen定ding地di分fen散san在zai水shui相xiang中zhong。
2.2化學改性法
化學改性法又稱自乳化法,即將一些親水性的基團引入到環氧樹脂分子鏈上,或嵌段或接枝,使環氧樹脂獲得自乳化的性質, dangzhezhonggaixingjuhewujiashuijinxingruhuashi,shushuixinggaojuwufenzilianjiuhuijujichengweili,lizijituanhuojixingjituanfenbuzaizhexieweilidebiaomian,youyudaiyoutongzhongdianheerxianghupaichi,zhiyaomanzuyidingdedonglixuetiaojian,jiukexingchengwendingdeshuixinghuanyangshuzhiruye,zheshihuaxuegaixingfazhibeishuixinghuanyangshuzhidejibenyuanli。genjuyinrudejuyoubiaomianhuoxingzuoyongdeqinshuijituanxingzhidebutong,huaxuegaixingfazhibeideshuixinghuanyangshuzhiruyekefenweiyinlizixing、陽離子型和非離子型三種。
2.2.1 陰離子型
通過適當的方法在環氧樹脂分子鏈中引入羧酸、磺huang酸suan等deng功gong能neng性xing基ji團tuan,中zhong和he成cheng鹽yan後hou的de環huan氧yang樹shu脂zhi就jiu具ju備bei了le水shui可ke分fen散san的de性xing質zhi。常chang用yong的de改gai性xing方fang法fa有you功gong能neng性xing單dan體ti擴kuo鏈lian法fa和he自zi由you基ji接jie枝zhi改gai性xing法fa。功gong能neng性xing單dan體ti擴kuo鏈lian法fa是shi利li用yong環huan氧yang基ji與yu一yi些xie低di分fen子zi擴kuo鏈lian劑ji如ru氨an基ji酸suan、氨基苯甲酸、氨基苯磺酸等化合物上的胺基反應,在環氧樹脂分子鏈中引入羧酸、磺酸基團,中和成鹽後就可分散在水相中。自由基接枝改性法是利用雙酚A環氧樹脂分子鏈中的亞甲基活性較大,在過氧化物作用下易於形成自由基,能與乙烯基單體共聚,可將丙烯酸、馬來酸酐等單體接枝到環氧樹脂分子鏈中,再中和成鹽後就可製得能自乳化的環氧樹脂。
2.2.2 陽離子型
hananjidehuahewuyuhuanyangshuzhifanyingshengchenghanshuanhuojianjiandehuanyangshuzhi,zaijiaruhuifaxingyoujiyiyuanruosuanrucusuanzhonghededaoyanglizixingdeshuixinghuanyangshuzhi。zheleigaixinghoudehuanyangshuzhizaishijizhongyingyongjiaoshao,zheshiyinweishuixinghuanyangguhuajitongchangshihanyouanjidejianxinghuahewu,lianggezufenhunhehou,tixirongyichuxianporuhefencengxianxiangeryingxianggaitixideshiyongxingneng。
2.2.3 非離子型
一(yi)般(ban)多(duo)在(zai)環(huan)氧(yang)樹(shu)脂(zhi)鏈(lian)上(shang)引(yin)入(ru)親(qin)水(shui)性(xing)聚(ju)氧(yang)乙(yi)烯(xi)基(ji)團(tuan),同(tong)時(shi)保(bao)證(zheng)每(mei)個(ge)改(gai)性(xing)環(huan)氧(yang)樹(shu)脂(zhi)分(fen)子(zi)中(zhong)有(you)兩(liang)個(ge)或(huo)兩(liang)個(ge)以(yi)上(shang)環(huan)氧(yang)基(ji),所(suo)得(de)的(de)改(gai)性(xing)環(huan)氧(yang)樹(shu)脂(zhi)不(bu)用(yong)外(wai)加(jia)乳(ru)化(hua)劑(ji)即(ji)能(neng)自(zi)分(fen)散(san)於(yu)水(shui)中(zhong)形(xing)成(cheng)乳(ru)液(ye)。如(ru)用(yong)分(fen)子(zi)量(liang)為(wei)4000~20000的雙環氧端基乳化劑與環氧當量為190的雙酚A環氧樹脂和雙酚A混合,以三苯基膦化氫為催化劑進行反應,可製得含親水性聚氧乙烯、聚ju氧yang丙bing烯xi鏈lian端duan的de環huan氧yang樹shu脂zhi,該gai樹shu脂zhi不bu用yong外wai加jia乳ru化hua劑ji便bian可ke溶rong於yu水shui,且qie耐nai水shui性xing增zeng強qiang。另ling外wai,這zhe種zhong方fang法fa製zhi得de的de粒li子zi較jiao細xi,通tong常chang為wei納na米mi級ji,前qian麵mian兩liang種zhong方fang法fa製zhi得de的de粒li子zi較jiao大da,通tong常chang為wei微wei米mi級ji。從cong此ci意yi義yi上shang講jiang,化hua學xue法fa雖sui然ran製zhi備bei步bu驟zhou多duo,成cheng本ben高gao,但dan在zai某mou些xie方fang麵mian具ju有you實shi際ji意yi義yi。
zaihuanyangshuzhilianshangyinruqinshuixingjuyangyixijituan,tongshibaozhengmeigegaixinghuanyangshuzhifenzishangyoulianggehuolianggeyishanghuanyangji,suodedegaixinghuanyangshuzhibuyongwaijiaruhuajijinengzifensanyushuizhongxingchengruye。ruxianyongjuyangyixierchun、聚氧丙烯二醇和環氧樹脂反應,形成端基為環氧基的加成物,利用此加成物和環氧當量為190的雙酚A環氧樹脂和雙酚A混合,以三苯基磷為催化劑進行反應,可得到含有親水性聚氧乙烯、juyangbingxilianduandehuanyangshuzhi。zhezhonghuanyangshuzhibuyongwaijiaruhuajijikerongyushuizhong,qieyouyuqinshuilianduanbaohanzaihuanyangshuzhifenzizhong,yinerzengqiangletumodenaishuixing。bingqiezaiyinrujuyanghuayixi、氧化丙烯鏈段後,交聯固化的網鏈分子量有所提高,交聯密度下降,形成的塗膜有一定的增韌作用。
2.3 相反轉法
相反轉是一種製備高分子量環氧樹脂乳液較為有效的方法,II型水性環氧樹脂塗料體係所用的乳液通常采用相反轉方法製備。相反轉原指多組分體係(如油/水/乳化劑)中的連續相在一定條件下相互轉化的過程,如在油/水/乳化劑體係中,其連續相由水相向油相(或從油相向水相)dezhuanbian,zailianxuxiangzhuanbianqu,tixidejiemianzhanglizuidi,yinerfensanxiangdechicunzuixiao。tongchangdezhibeifangfashizaigaojianqielitiaojianxiaxianjiangruhuajiyuhuanyangshuzhijunyunhunhe,suihouzaiyidingdejianqietiaojianxiahuanmandixiangtixizhongjiarushui,suizhejiashuiliangdezengjia,zhenggetixizhubuyouyoubaoshuixingzhuanbianweishuibaoyouxing,xingchengjunyunwendingdeshuikexishitixi。ruhuaguochengtongchangzaichangwenxiajinxing,duiyugutaihuanyangshuzhi,wangwangxuyaojiezhuyushaoliangrongjihejiareshihuanyangshuzhizhandujiangdihouzaijinxingruhua。
2.4 固化劑乳化法
I型xing水shui性xing環huan氧yang樹shu脂zhi體ti係xi通tong常chang采cai用yong固gu化hua劑ji乳ru化hua法fa來lai製zhi備bei水shui性xing環huan氧yang樹shu脂zhi乳ru液ye。這zhe類lei體ti係xi中zhong的de環huan氧yang樹shu脂zhi一yi般ban預yu先xian不bu乳ru化hua,而er由you水shui性xing環huan氧yang固gu化hua劑ji在zai使shi用yong前qian混hun合he乳ru化hua,因yin而er這zhe類lei固gu化hua劑ji必bi須xu既ji是shi交jiao聯lian劑ji又you是shi乳ru化hua劑ji。水shui性xing環huan氧yang固gu化hua劑ji是shi以yi多duo胺an為wei基ji礎chu,對dui多duo胺an固gu化hua劑ji進jin行xing加jia成cheng、接枝、擴鏈和封端, 在zai其qi分fen子zi中zhong引yin入ru具ju有you表biao麵mian活huo性xing作zuo用yong的de非fei離li子zi型xing表biao麵mian活huo性xing鏈lian段duan,對dui低di分fen子zi量liang的de液ye體ti環huan氧yang樹shu脂zhi具ju有you良liang好hao的de乳ru化hua作zuo用yong。用yong固gu化hua劑ji乳ru化hua法fa製zhi備bei水shui性xing環huan氧yang樹shu脂zhi體ti係xi的de優you勢shi是shi在zai使shi用yong前qian由you固gu化hua劑ji直zhi接jie乳ru化hua環huan氧yang樹shu脂zhi,不bu需xu考kao慮lv環huan氧yang樹shu脂zhi乳ru液ye的de儲chu存cun穩wen定ding性xing和he凍dong融rong穩wen定ding性xing;缺點是配得的乳液適用期短。
3 水性環氧樹脂塗料的優缺點
經(jing)過(guo)半(ban)個(ge)世(shi)紀(ji)的(de)發(fa)展(zhan),水(shui)性(xing)環(huan)氧(yang)樹(shu)脂(zhi)塗(tu)料(liao)的(de)性(xing)能(neng)有(you)了(le)很(hen)大(da)的(de)提(ti)高(gao)。水(shui)性(xing)環(huan)氧(yang)樹(shu)脂(zhi)塗(tu)料(liao)可(ke)在(zai)室(shi)溫(wen)或(huo)加(jia)熱(re)條(tiao)件(jian)下(xia)固(gu)化(hua),與(yu)溶(rong)劑(ji)型(xing)環(huan)氧(yang)樹(shu)脂(zhi)塗(tu)料(liao)相(xiang)比(bi),水(shui)性(xing)環(huan)氧(yang)樹(shu)脂(zhi)塗(tu)料(liao)有(you)以(yi)下(xia)優(you)勢(shi):
(1)以水作為分散介質,不含有機溶劑或揮發性有機化合物含量較低,無環境汙染,沒有失火隱患;滿足當前環境保護的要求;
(2)操作性能好,施工工具可用水直接清洗,操作安全、方便;
(3)對大多基材具有良好的附著力,並可以與水泥或水泥砂漿配合使用;
(4)可在室溫和潮濕的環境中固化,有合理的固化時間,並保證有較高的交聯密度。
(5)能與其它水性聚合物體係混合使用,在性能上相互彌補。
水性環氧塗料的優點是顯而易見的,但也存在以下一些缺點:
(1)與有機溶劑相比,水的蒸發熱高,這就要求有另外的手段來幫助水的蒸發。在低溫和高濕情況下,水的蒸發更侵,使表幹時間延長;
(2)shuidebiaomianzhanglijiaogao,zheduijicaiheyantianliaoderunshizaochengyinnan,youqishichuyoubuganjingdedicaigengnanrunshi,xujiarujicairunshijilaitigaoshuixinghuanyangshuzhituliaoduijicaiderunshixing;
(3)顏填料在水性環氧塗料中的分散穩定性較溶劑型塗料差,易於聚集沉澱;
(4)水的導電率高,易使金屬腐蝕,在塗膜幹燥過程中發生的閃蝕問題,但用閃蝕抑製劑和活性顏料配合使用,可解決此問題。
4 水性環氧樹脂的應用
盡管水性環氧樹脂有一些不足,但可以通過一定的手段加以改進,對水性環氧樹脂基料、固(gu)化(hua)劑(ji)以(yi)及(ji)各(ge)種(zhong)改(gai)性(xing)劑(ji)和(he)助(zhu)劑(ji)的(de)合(he)理(li)選(xuan)擇(ze),就(jiu)可(ke)製(zhi)備(bei)出(chu)性(xing)能(neng)各(ge)異(yi)的(de)水(shui)性(xing)環(huan)氧(yang)樹(shu)脂(zhi)塗(tu)料(liao)和(he)膠(jiao)粘(zhan)劑(ji)等(deng)。現(xian)已(yi)有(you)許(xu)多(duo)卓(zhuo)有(you)成(cheng)效(xiao)的(de)應(ying)用(yong),而(er)且(qie)其(qi)中(zhong)不(bu)少(shao)用(yong)途(tu)是(shi)溶(rong)劑(ji)型(xing)環(huan)氧(yang)不(bu)適(shi)用(yong)的(de)。
目前水性環氧樹脂的應用主要包括以下幾個方麵:
⑴ 混凝土封閉底漆
shuixinghuanyangshuzhituliaokezaishidehuoxinjiaozhudehunningtubiaomianshigong,duihunningtubiaomianyoulianghaodefuzheli,keyifengbihunningtumaoxiguandeshuiqi,bingkefangzhifanjian,shihezuoweihunningtufengbidiqi。zaifengbidiqishangmiankeshigongrongjixinghuoshuixinghuanyangdipingtuliao。
(2)工業地坪塗料
工業地坪塗裝方麵是水性環氧樹脂塗料的重要用途。水性環氧氣味小,塗層表麵易於清洗,特別適用於醫院、食品廠、超市、乳品廠和化妝品廠等需要保持高度清潔的場所。如需二次裝修,不影響重塗性,新老塗層仍保持良好的粘附性。
(3) 木器漆
采cai用yong的de水shui性xing環huan氧yang樹shu脂zhi塗tu料liao為wei雙shuang組zu分fen體ti係xi,塗tu膜mo固gu化hua後hou具ju有you較jiao高gao的de硬ying度du和he良liang好hao的de抗kang刮gua傷shang性xing,配pei成cheng清qing漆qi可ke用yong於yu木mu質zhi地di板ban,替ti代dai目mu前qian市shi場chang上shang廣guang泛fan使shi用yong的de溶rong劑ji型xing聚ju氨an酯zhi水shui晶jing地di板ban漆qi和he聚ju酯zhi家jia具ju漆qi,配pei成cheng色se漆qi可ke替ti代dai溶rong劑ji型xing環huan氧yang樹shu脂zhi和he聚ju氨an酯zhi磁ci漆qi,用yong於yu廚chu房fang、家具和機械設備等。
(4)防腐塗料
水性環氧樹脂防腐塗料現已商品化的有水性環氧鐵紅防鏽漆、水性環氧磷酸鋅防鏽漆、水性環氧富鋅底漆和水性環氧雲母防鏽漆,水性環氧防鏽漆性能較市場上常見的苯丙、yibingshuiruxingfangxiuqiheshuixinghuanyangzhifangxiuqixingnengyouhendatigao,zaiguowaishifazhanzuikuaideshuixingtuliao。jingguojiaochangshijiandefazhan,shuixinghuanyangfangfushituliaoyijingyingyongdaorongjixinghuanyangfangfushituliaosuoshejidelingyu,guowaishenzhiyijiangshuixinghuanyangfangfutuliaolieruzhongfangfutuliaodefanchou。
(5)
防水材料和防滲堵漏材料
水性環氧樹脂塗料與水泥、沙子配合使用可用作
防水材料,環氧的交聯網絡和水泥的水合固化使得該
防水材料具有良好的防滲堵漏效果。可用於屋頂地麵的裂縫修補,數小時後就可不
漏水。
(6)水泥砂漿修補材料
環氧乳液水泥砂漿修補材料是一種聚合物水泥砂漿,與水泥、沙子等多種材料有良好的配伍性和粘結性、自身機械強度高、耐久性好、施工方便,並具有可在潮濕和帶水環境下粘結修補的優點。在大壩、水閘等水利工程和道路橋梁修補中應用較多,增強和防滲效果良好。
(7)膠粘劑
水性環氧樹脂塗料的混合比要求不是特別嚴格,一般在環氧基與胺氫比例為0.7:1~1.3:1範圍內均可固化,不需嚴格計量混配。作為膠粘劑,水性環氧樹脂可應用在新老混凝土的粘結、水泥預製品的修補和紙塑複膜用膠粘劑等。
(8)玻璃纖維浸潤劑
環(huan)氧(yang)樹(shu)脂(zhi)分(fen)子(zi)中(zhong)的(de)極(ji)性(xing)羥(qiang)基(ji)和(he)醚(mi)鍵(jian)對(dui)玻(bo)璃(li)纖(xian)維(wei)表(biao)麵(mian)有(you)很(hen)強(qiang)的(de)粘(zhan)附(fu)性(xing),對(dui)玻(bo)璃(li)纖(xian)維(wei)有(you)良(liang)好(hao)的(de)保(bao)護(hu)功(gong)能(neng)和(he)集(ji)束(shu)性(xing)。並(bing)且(qie)環(huan)氧(yang)樹(shu)脂(zhi)作(zuo)為(wei)成(cheng)膜(mo)劑(ji)與(yu)其(qi)他(ta)組(zu)分(fen)配(pei)合(he),有(you)利(li)於(yu)浸(jin)潤(run)劑(ji)的(de)穩(wen)定(ding)儲(chu)存(cun)。國(guo)外(wai)水(shui)性(xing)環(huan)氧(yang)樹(shu)脂(zhi)乳(ru)液(ye)在(zai)玻(bo)纖(xian)浸(jin)潤(run)劑(ji)中(zhong)的(de)應(ying)用(yong)已(yi)比(bi)較(jiao)成(cheng)熟(shu)。
(9)鋁箔用防腐底漆
鋁箔在使用過程中容易遭受侵蝕,遇堿產生 "白粉"或huo被bei氧yang化hua而er鏽xiu蝕shi,不bu但dan縮suo短duan鋁lv箔bo的de使shi用yong壽shou命ming,還hai造zao成cheng環huan境jing汙wu染ran。空kong調tiao親qin水shui鋁lv箔bo上shang的de防fang腐fu塗tu層ceng通tong常chang采cai用yong水shui性xing環huan氧yang塗tu料liao,采cai用yong烘hong烤kao方fang式shi,要yao求qiu1-2μm的防腐幹膜塗層有良好附著力,且能夠耐強堿。上海綠嘉的水性環氧塗料可比較成功地應用在這個領域。
(10)核設施用塗料
水性環氧樹脂塗料以水作為分散介質,不含揮發性有機溶劑或含量很低,不燃,儲存、yunshuheshiyongguochengzhongdeanquanxinghengao,erqieguhuahouxingchengdetumohenrongyiquchufangshexingwuran,erqieshuixinghuanyanglianghaodefutuxingkeyifangbianhedianzhandeduocizhuangxiu。guowaihenduoguojiayipizhunshuixinghuanyangshuzhituliaoyongyuhedianzhanneibu。