Uyongeza njani ngokufanelekileyo iHEC kwiLatex Paint?

Iselulosi yeHydroxyethyl (HEC) sesona sixhobo sixhaphakileyo se-nonionic thickener kunye nesilungisi serheology kwipeyinti yelatex. Iphucula ngokufanelekileyo isakhiwo se-viscosity, iimpawu zokulinganisa, ukuzinza kokugcinwa, kunye nokusebenza kwe-anti-splatter yenkqubo. Ukongeza ngokufanelekileyo i-HEC kwimiqulu yepeyinti ye-latex ayichaphazeli kuphela ixabiso lemveliso kodwa ichaphazela ngokuthe ngqo umgangatho wefilimu yepeyinti kunye nokuziva kwesicelo. Oku kulandelayo kubonelela ngengcaciso ecwangcisiweyo kwimiba emine: ukhetho, idosi, indlela yokongeza, kunye nezilumkiso.

1. Ukukhetha iBanga le-Viscosity elifanelekileyo ngokuSekwe kuHlobo lwePeyinti yeLatex

1.1. Ipeyinti yeLatex yodonga yangaphakathi (uQoqosho/uHlobo oluQhelekileyo)

Kunconywa ukusebenzisa i-HEC ye-viscosity ephakathi ukuya phezulu kunye ne-viscosity ye-30,000-60,000 mPa·s. Izibonelelo zayo ziquka ukusebenza kakuhle kokuqina, ukusebenza kakuhle kweendleko, kunye nokukwazi ukuhlangabezana nomgangatho kunye neemfuno ze-thixotropic zeepeyinti eziqhelekileyo zangaphakathi zodonga.

1.2. Iipeyinti zodonga zangaphakathi ezikwisiphelo esiphezulu (Matte, Satin)

Iimveliso ze-viscosity eziphezulu kunye ne-viscosity ye-60,000-100,000 mPa·s inokukhethwa, okukhokelela ekugqityweni okugudileyo, okutyebileyo kunye neempawu ezingcono zokuchasana ne-splatter ngexesha lokusetyenziswa.

1.3. Iipeyinti zeLatex zangaphandle

Ukuphucula i-anti-sagging kunye nokumelana namanzi, i-viscosity ephakathi HEC (30,000-60,000 mPa·s) iqhele ukusetyenziswa, ihlala idityaniswa neethers zecellulose okanye iPU thickeners ukufumana amandla angcono esivuno kunye nozinzo lokugcina.

1.4. IiNkqubo zePVC eziPhakamileyo (Iipeyinti zeLatex zohlobo lwePutty)

Ii-HEC eziphezulu ezityebileyo ziyafuneka ukuqinisekisa ukuthembeka kwesakhiwo kunye nokuthintela ukuhlalisa kunye nokwahlula.

Ngokubanzi, ukhetho lwebakala le-viscosity kufuneka lulungelelanise umphumo wokuqina, iindleko, kunye nokusebenza kwesicelo; i-viscosity ephezulu ayisoloko ingcono.

2. Ulawulo olufanelekileyo lwe-HEC Ukongeza

2.1. 0.2%-0.6% (ngokusekwe kwimveliso egqityiweyo)

Iipeyinti zodonga zangaphakathi eziqhelekileyo zisebenzisa i-0.25%-I-0.40%, ngelixa iingubo eziphezulu okanye iinkqubo eziphezulu ze-PVC zingafikelela malunga ne-0.5%.

2.2. Imali eyongeziweyo kufuneka ihlengahlengiswe kancinane ngokusekelwe kwezi zinto zilandelayo:

I-pigment kunye ne-filler dosage kunye nexabiso le-PVC: Xa iphezulu i-PVC, i-HEC iyadingeka ngakumbi.

Uhlobo lwe-Emulsion: Ii-emulsions ezinomlinganiselo ophezulu wezinto ezenza ifilimu kunye nokudibana okuqinileyo kufuna ukuqina okuncinci kancinci.

I-viscosity ekujoliswe kuyo: Iindlela ezahlukeneyo zokusetyenziswa zibangela ukungafani okukhulu kwi-viscosity efunekayo.

Ukuhambelana namanye ama-thickeners: Ukuba idibene ne-HEUR, i-ASE, njl., idosi ye-HEC inokwehliswa ngokufanelekileyo.

RIdosi ye-HEC efanelekileyo kufuneka ifezekise: i-moderate static viscosity, ukuzinza kwenkqubo, akukho splattering ngexesha lesicelo, kunye nokuziva ukuxubha okugudileyo.

3. Iindlela ezichanekileyo zokongezwa kunye nokuchithwa

3.1. Indlela yokuSombulula iStock elungiselelwe kwangaphambili (Eyacetyiswayo)

Lungiselela isisombululo esicacileyo, esibonakalayo se-HEC kwisilinganiselo se-1:20-1:40 phambi kokuba uyongeze kwinkqubo yokupeyinta latex. Izinto eziluncedo:

Ukuchithwa ngokucokisekileyo, akukho masuntswana eentlanzi

Iququzelela ukulungiswa kakuhle kwe-viscosity

Kunqanda impembelelo yokutyeba yendawo kwi-emulsion

Isisombululo sesitokhwe kufuneka sichithwe 1-Iiyure ezi-2 kwangaphambili.

3.2. Indlela yokongeza umgubo oyomileyo ngokuthe ngqo (Ifuna uLawulo olungqongqo)

Ukuba ukongeza umgubo owomileyo kuyimfuneko, landela ezi zikhokelo:

Ngena kancinci ngelixa usasaza ngesantya esiphezulu ukuthintela ukuqumba

Yongeza ngexesha lesigaba samanzi, ukuchithwa ngokupheleleyo ngaphambi kokuba ungeze kwi-emulsion

Ixesha lokusasazwa kufuneka lingabi ngaphantsi kwe-20-Imizuzu engama-30

Yongeza i-arhente yokumanzisa kwangaphambili okanye usebenzise i-HEC yokunyibilika ngokukhawuleza ukuba kuyimfuneko ukunciphisa i-clumping.

4. IiTeknikhi zokuphucula iNkqubo yeRheological Effects

4.1. Sebenzisa nge-HEUR/ASE

Inkqubo edibeneyo iphucula kakhulu i-thixotropy, iphucula i-anti-splatter kunye neempawu zokulinganisa, kwaye yenza isicelo sibe lula.

4.2. Ulawulo lwe-pH kunye neNkqubo yokuGcina

I-HEC isebenza kakuhle kuluhlu lwe-pH lwe-7-11; i-asidi egqithisileyo inokunciphisa ngokulula i-viscosity. Ezinye izilondolozo zinokuchaphazela izinga lokuchithwa kwe-HEC.

4.3. Ulawulo Lozinzo Lokugcinwa

Ngexesha lokugcinwa kwexesha elide kumaqondo okushisa aphezulu, i-HEC ephezulu ye-viscosity inokufumana ukuhla kwe-viscosity. Ngoko ke, iimveliso eziguquguqukayo eziphezulu zingakhethwa.

4.4. Ukuthintela ukutyeba okungeyonyani kunye nokuGxisa

Emva kokufezekisa i-viscosity ekujoliswe kuyo ekuqulunqweni, ukuxubha, ukuqengqeleka, kunye novavanyo lwe-sagging kufuneka luqhutywe. Umlinganiselo we-HEC kufuneka emva koko ulungiswe kakuhle ukuze kuqinisekiswe ukuvakala kwesicelo esingaguqukiyo.

Ukongezwa okufanelekileyo kweI-HEC kwipeyinti ye-latex ifuna ingqwalasela ebanzi yokukhethwa kwebakala le-viscosity, ulawulo lwedosi, indlela yokuchithwa, kunye nokulungiswa kwesakhiwo se-rheological. Ukukhetha i-HEC efanelekileyo kunye nokuyisebenzisa ngokuchanekileyo akuphuculi kuphela ukusebenza kunye nokubonakala komgangatho wepeyinti kodwa kwandisa uzinzo lokugcina kunye nomgangatho wemveliso, okwenza kube ngumba obalulekileyo wokuphucula umgangatho wepeyinti ye-latex.