Intshayelelo ye-RDP-Redispersible Polymer Powder

I-polymer powder Redispersible (RDP) yipolymer esekelwe kwi-polymer esetyenziswa kwizicelo ezahlukeneyo kwishishini lokwakha. I-RDP yafunyanwa ngokumiswa ngokutshizwa kwee-polymer emulsions. Isetyenziswe ngokubanzi kwiinkqubo ze-samente ukuphucula iimpawu zodaka ezifana nokubambelela, ukuchasana kwamanzi kunye namandla okuguquguquka.

I-RDP iqulethwe ngeentlobo zeepolymers, kuquka i-vinyl acetate-ethylene (VAE), i-styrene-butadiene (SB), i-ethylene-vinyl chloride (EVC), kunye ne-polyvinyl alcohol (PVA). Ezi polymers ziyilelwe ukuba zihambelane neentlobo ezahlukeneyo zezibophelelo ezifana nesamente, ikalika kunye negypsum. Zisetyenziswe kwiindidi ezahlukeneyo zezicelo ezibandakanya i-tile adhesives, i-self-leveling compounds, i-membrane yokukhusela amanzi kunye ne-insulation yangaphandle kunye neenkqubo zokugqiba (EIFS).

Inkqubo yokwenziwa kwe-RDP inezigaba ezintathu eziphambili: i-polymerization, i-emulsification kunye nokomisa isitshizi. Kwinqanaba le-polymerization, i-monomers i-polymerized phantsi kweemeko ezithile, ezifana nobushushu, uxinzelelo kunye nexesha lokuphendula. Ukusasazwa kwepolymer okunesiphumo kuzinzisiwe kunye ne-surfactants ukuthintela i-particle agglomeration. Kwinqanaba le-emulsification, i-polymer dispersion icutshungulwa ngakumbi ukwenza i-emulsion, ethi emva koko itshizwe yomiswe ukufumana i-RDP. Ngethuba lokumisa ukutshiza, amanzi aphuphuma kumaconsi e-emulsion, enze iinqununu ze-polymer. Umgubo obangelwayo uqokelelwa kwaye upakishwe ukuthunyelwa.

Iipropati ze-RDP zixhomekeke kwizinto ezininzi ezifana nodidi lwepolymer, ubungakanani bamasuntswana kunye nokwakheka kweekhemikhali. Eyona polymer isetyenziswa ngokuqhelekileyo kwi-RDP yi-VAE, ene-adhesion egqwesileyo kunye nokumelana namanzi. Ubungakanani be-particle ye-RDP bunokwahluka ukusuka kwi-microns ezimbalwa ukuya kwi-millimeters ezimbalwa, kuxhomekeke kwisicelo. Ukwakhiwa kweekhemikhali ze-RDP nako kunokwahluka ngokuxhomekeke kwiipropati ezifunwayo. Umzekelo, ii-RDPs zinokuqulatha izongezo ezongezelelweyo ezifana neplastiki, ii-dispersants kunye ne-thickeners ukuphucula iipropathi zazo.

I-RDP ineenzuzo ezininzi ngaphezu kwezinye iintlobo zeepolymers ezisetyenziswa ekwakheni. Enye yeenzuzo eziphambili kukukwazi ukusabalalisa kwakhona emanzini. Oku kuthetha ukuba i-RDP inokuxutywa namanzi ukwenza i-emulsion ezinzileyo, enokuthi isetyenziswe kwizicelo ezahlukeneyo. I-redispersibility ye-RDP ixhomekeke kukwakheka kweekhemikhali kunye nobukhulu bamasuntswana. Amasuntswana e-RDP ayilelwe ukuba ahambelane namanzi kwaye asasazeke ngokukhawuleza xa exutywe namanzi.

Enye inzuzo yeRDP kukukwazi ukuphucula ukusebenza kweenkqubo zesamente. I-RDP inokuphucula ukunamathela phakathi kodaka kunye ne-substrate, ukunciphisa i-shrinkage kunye nokwandisa amandla omdaka. Ikwaphucula ukuxhathisa kwamanzi kudaka, ukuthintela ukungena kwamanzi kunye nokunciphisa umngcipheko wemozulu.