Redispersible polymer powders (RDP) musanganiswa wakaoma wemapolymers uye ekuwedzera ayo anoshandiswa zvakanyanya mukuvaka zvinhu, kunyanya mukugadzira yakaoma-musanganiswa dhaka.Idzi hupfu hunoita basa rakakosha mukuvandudza mashandiro uye hunhu hwezvakasiyana zvekuvaka zvakaita sematairi anonamira, grouts, self-leveling makomisheni uye simende plasters.
Zvinhu zvakakosha:
Polymer base:
Ethylene vinyl acetate (EVA): EVA copolymer inowanzoshandiswa muRDP nekuda kwemaitiro ayo akanaka ekugadzira firimu, kunamatira, uye kushanduka.Iyo vinyl acetate yemukati mucopolymer inogona kugadziridzwa kuti ichinje zvimiro zvepolymer.
Vinyl Acetate vs. Ethylene Carbonate: Zvichienderana nezvinodiwa zvekushandiswa, vagadziri vanogona kushandisa ethylene carbonate panzvimbo yevinyl acetate.Ethylene carbonate yakavandudza kudzivirira kwemvura uye kunamatira mumamiriro emvura.
Acrylics: Acrylic polymers, zvinosanganisira pure acrylics kana copolymers, anoshandiswa kune yakasarudzika yemamiriro ekunze kuramba, kusimba, uye kuita zvakasiyana.Ivo vanozivikanwa nekupa yakanakisa kunamatira kune akasiyana substrates.
Dziviriro colloid:
Hydroxypropyl methylcellulose (HPMC): HPMC inodzivirira colloid inowanzoshandiswa muRDP.Iyo inovandudza kudhindwa kwepolymer zvimedu uye inosimudzira iyo yakazara zvimiro zvehupfu.
Polyvinyl doro (PVA): PVA imwe inodzivirira colloid iyo inobatsira mukugadzikana uye kupararira kwepolymer particles.Inoitawo basa mukudzora viscosity yehupfu.
Plasticizer:
Dibutyl Phthalate (DBP): DBP muenzaniso weplasticizer iyo inowanzowedzerwa kuRDP kuti ivandudze kushanduka uye kugadzirisa.Inobatsira kudzikisira tembiricha yegirazi yepolymer, ichiita kuti iwedzere elastic.
filler:
Calcium Carbonate: Mafirita akadai secalcium carbonate anogona kuwedzerwa kuwedzera huwandu hwehupfu uye nekupa nzira inodhura yekugadzirisa zvinhu zvakaita semanyorerwo, porosity uye opacity.
Stabilizers uye antioxidants:
Stabilizers: Aya anoshandiswa kudzivirira kuparara kwepolymer panguva yekuchengetedza uye kugadzirisa.
Antioxidants: Antioxidants inodzivirira iyo polymer kubva mukuora kweiyo oxidative, kuve nechokwadi chehupenyu hurefu hweRDP.
Mabasa echimwe nechimwe chikamu:
Polymer base: Inopa firimu-kugadzira zvivakwa, kunamatira, kuchinjika uye simba remagetsi kune yekupedzisira chigadzirwa.
Dziviriro colloid: Wedzera kudzoreredza, kugadzikana uye kupararira kwepolymer zvimedu.
Plasticizer: Inovandudza kuchinjika uye processability.
Fillers: Gadzirisa zvivakwa zvakaita semanyorerwo, porosity, uye opacity.
Stabilizers uye antioxidants: Dzivirira kuparara kwepolymer panguva yekuchengetedza uye kugadzirisa.
mukupedzisa:
Redispersible polymer poda (RDP) chinhu chinogoneka uye chakakosha muzvigadzirwa zvemazuva ano zvekuvaka.Kuumbwa kwemakemikari ayo, kusanganisira mapolymers akadai seEVA kana acrylic resins, anodzivirira colloids, plasticizers, mafirita, stabilizers uye antioxidants, akanyatsogadzirwa kuti asangane nezvinodiwa zvega rega rega.Iko kusanganiswa kwezvikamu izvi kunobatsira kuvandudza poda redispersibility, kusimba kwechisungo, kushanduka uye kushanda kwese mukuoma musanganiswa dhaka maumbirwo.
Nguva yekutumira: Zvita-18-2023