Chii chinonzi redispersible polymer poda?

Redispersible polymer poda (RPP) inoyerera-inoyerera, chena hupfu inogadzirwa nespray-drying polymer dispersions kana emulsions. Iwo anosanganisira polymer zvimedu zvakaputirwa nezvinodzivirira uye zvinowedzera. Kana yakasanganiswa nemvura, hupfu uhwu hunopararira nyore nyore kugadzira emulsion yepolymer yakagadzikana, zvichiita kuti ishandiswe mumhando dzakasiyana dzekushandisa mukuvaka, pendi uye machira, zvinonamira, uye mamwe maindasitiri.

Kuumbwa:

Iko kuumbwa kwe redispersible polymer powders kazhinji inosanganisira zvinotevera zvikamu:

1. Polymer Particles: Chinhu chikuru cheRPP i polymer particles, iyo inotorwa kubva kune akasiyana mapolymers ekugadzira akadai sevinyl acetate-ethylene (VAE), ethylene-vinyl acetate (EVA), acrylics, styrene-butadiene (SB), kana polyvinyl acetate ( PVA). Aya mapolymer anobatsira kune anodiwa zvivakwa uye maitiro ekuita echigadzirwa chekupedzisira.
2. Dziviriro Agents: Kudzivirira iyo polymer zvimedu kuti zvisangane panguva yekuchengetedza uye yekufambisa, zvinodzivirira zvakaita se polyvinyl doro (PVA) kana cellulose ethers inowanzoshandiswa. Aya maajenti anodzikamisa mapolymer zvimedu uye nekuona kuti adispersibility mumvura.
3. Plasticizers: Plasticizers inogona kuwedzerwa kuvandudza kushanduka, kushanda, uye kunamatira kweRPPs. Izvi zvinowedzera zvinobatsira kukwirisa mashandiro epolymer zvimedu mumashandisirwo akasiyana siyana, kunyanya mumachira anochinjika, zvinonamira, uye zvisimbiso.
4. Fillers uye Additives: Zvichienderana nezvinodiwa zvekushandisa, mafirita, pigment, crosslinking agents, thickeners, uye zvimwe zvinowedzera zvinogona kuiswa muRPP maumbirwo ekusimudzira zvivakwa zvavo kana kupa chaiwo maitiro.

Properties uye Hunhu:

Redispersible polymer poda inoratidza akati wandei akakosha zvivakwa uye hunhu hunovaita kuti vagone kuita zvakasiyana uye kushandiswa zvakanyanya mumaindasitiri akasiyana:

1. Redispersibility: RPP inopararira mumvura kuti iite yakagadzikana emulsions yepolymer kana dispersi, zvichibvumira kubatanidzwa nyore mukugadzirisa uye kunotevera kushandiswa.
2. Firimu-Kugadzira Kugona: Kana yakaparadzirwa mumvura uye ikaiswa panzvimbo, RPP inogona kuumba akatetepa, anoenderera mafirimu pakuomeswa. Aya mafirimu anowedzera kunamatira, kusimba, uye kuramba kwemamiriro ekunze mumajasi, zvinonamira, uye zvisimbiso.
3. Enhanced Adhesion: RPP inovandudza adhesion pakati pe substrates uye machira, dhaka, kana adhesives, zvichikonzera zvisungo zvakasimba uye mashandiro ari nani mukuvaka uye zvekuvaka.
4. Kuchengetedzwa Kwemvura: Iyo hydrophilic chimiro cheRPP inovagonesa kutora uye kuchengetedza mvura mukati mekugadzira, kuwedzera hydration uye kuvandudza kushanda, kuvhurika nguva, uye kunamatira mudhaka uye mataira adhesive application.
5. Kuchinjika uye Kuoma: RPP-yakagadziridzwa zvinhu zvinoratidzira kuwedzera kuchinjika, elasticity, uye kuoma, zvichiita kuti zvirambe zvichirambana nekutsemuka, deformation, uye kukanganisa kukanganisa.
6. Mamiriro ekunze Resistance: RPPs inosimudzira kuramba kwemamiriro ekunze uye kusimba kwemajasi, zvisimbiso, uye kudzivirira mvura membranes, ichipa dziviriro yenguva refu kubva kune UV mwaranzi, mwando, uye zvakatipoteredza zvinhu.

Applications:

Redispersible polymer poda inowana maapplication muakasiyana maindasitiri uye zvigadzirwa, zvinosanganisira:

• Kuvaka: Mataira anonamira, dhaka, grouts, kudzivirira mvura membranes, self-leveling makomisheni, uye ekunze insulation uye kupedza masisitimu (EIFS).
• Paints and Coatings: Pendi dzekunze, mabhanhire ane mavara, mapurasita ekushongedza, uye mabhanhire ekuvaka.
• Adhesives uye Sealants: Mataira anonamira, crack fillers, caulks, flexible sealants, uye zvinomisikidza zvinobatirira.
• Micheka: Machira ekupfeka, maajenti ekupedzisa, uye saizi yemakemikari.

redispersible polymer poda zvinhu zvakasiyana-siyana uye zvakasiyana-siyana zvinoshandiswa kuvandudza mashandiro, kusimba, uye kuwanda kwezvakasiyana zvigadzirwa uye magadzirirwo mukuvaka, pendi uye machira, anonamira, machira, uye mamwe maindasitiri.