I-Redispersible Polymer Powder (RDP) luhlobo lwepolymer powder olusetyenziswa ngokubanzi kwizicelo ezahlukeneyo zokwakha. Ii-RDPs zenziwa yinkqubo ebizwa ngokuba yi-spray drying. Ngethuba le nkqubo, umxube we-monomers e-soluble yamanzi kunye nezinye izongezo zenziwe nge-emulsified, kwaye emva koko amanzi asuswe ngokumisa isitshizi. Imveliso ebangelwa ngumgubo onokuthi usasazwe ngokulula emanzini. Ii-RDPs zinokubambelela okugqwesileyo, ukuguquguquka, kunye nokumelana namanzi, okubenza ukuba balungele ukusetyenziswa kwizicelo ezininzi.

Ukuhlelwa kwee-RDP kusekelwe kwizinto ezininzi, kubandakanywa ukubunjwa kweekhemikhali, inkqubo ye-polymerization, kunye neempawu zokugqibela zemveliso. Kweli nqaku, siza kuxubusha ulwahlulo lwe-RDPs ngokusekelwe kwimichiza yabo.

1. IVinyl Acetate Ethylene (VAE) RDPs

Ii-RDPs ze-VAE lolona hlobo lusetyenziswa kakhulu lwe-RDPs. Zenziwe nge-copolymerizing vinyl acetate (VA) kunye ne-ethylene (E) phambi kwamanye ama-monomers afana ne-acrylate okanye i-methacrylate. Umxholo we-VA kwi-copolymer uhluka phakathi kwe-30% kunye ne-80%, kuxhomekeke kwisicelo esijoliswe kuyo. Ii-RDP ze-VAE ziyaziwa ngeempawu zazo zokuncamathelisa ezibalaseleyo, ukuguquguquka, kunye nokumelana namanzi. Ngokuqhelekileyo zisetyenziselwa ukunamathiswa kweethayile, iidyasi ze-skim, kunye ne-putty eludongeni.

2. IiRDP ze-Acrylic

Ii-Acrylic RDPs zenziwe ngokucombulula ii-acrylic esters kunye nezinye iimonomers ezifana nevinyl acetate, ethylene, okanye styrene. I-acrylic esters esetyenziswe kwi-copolymer ingaba yi-methyl methacrylate (MMA), i-butyl acrylate (BA), okanye indibaniselwano yazo zombini. Iimpawu ze-acrylic RDPs zixhomekeke kumlinganiselo weemonomers ezisetyenziswe kwinkqubo ye-copolymerization. I-Acrylic RDPs inokumelana nemozulu ebalaseleyo, kwaye iqhele ukusetyenziswa kwiingubo zangaphandle, i-membrane yokuthintela amanzi, kunye neengubo zesamente.

3. I-Styrene Butadiene (SB) ii-RDPs

I-SB RDPs zenziwe nge-copolymerizing styrene kunye ne-butadiene phambi kwezinye iimonomers ezifana ne-acrylate okanye i-methacrylate. Umxholo we-styrene kwi-copolymer uhluka phakathi kwe-20% kunye ne-50%, kuxhomekeke kwisicelo esijoliswe kuyo. Ii-SB RDPs zineempawu ezintle zokuncamathelisa, kwaye zidla ngokusetyenziswa kwiithayile zokuncamathelisa, udaka, kunye neegrouts.

4. IVinyl Acetate (VA) RDPs

Ii-RDP ze-VA zenziwe nge-homopolymerizing vinyl acetate monomers. Banomxholo ophezulu we-vinyl acetate, ukusuka kwi-90% ukuya kwi-100%. Ii-RDPs ze-VA zineempawu ezintle zokuncamathelisa, kwaye zisetyenziswa ngokuqhelekileyo kwii-adhesives ze-tile, ii-adhesive bonding, kunye ne-cementitious coatings.

5. Ethylene Vinyl Chloride (EVC) RDPs

I-EVC RDPs zenziwe nge-copolymerizing ethylene kunye ne-vinyl chloride phambi kwezinye iimonomers ezifana ne-acrylate okanye i-methacrylate. Umxholo we-vinyl chloride kwi-copolymer uhluka phakathi kwe-5% kunye ne-30%, kuxhomekeke kwisicelo esijoliswe kuyo. Ii-EVC RDPs zinokuxhathisa okulungileyo kwamanzi kunye nokubambelela kakuhle kwii-substrates ezahlukeneyo. Ngokuqhelekileyo zisetyenziselwa ukunamathiswa kweethayile, iidyasi ze-skim, kunye ne-putty eludongeni.

Ukuqukumbela, ii-RDPs luhlobo olubalulekileyo lwepolymer powder olusetyenziswa ngokubanzi kwizicelo ezahlukeneyo zokwakha. Ukuhlelwa kwee-RDP kusekelwe kwizinto ezininzi, kubandakanywa ukubunjwa kweekhemikhali, inkqubo ye-polymerization, kunye neempawu zokugqibela zemveliso. Ukwakhiwa kweekhemikhali ze-RDPs zingahlelwa kwi-Vinyl Acetate Ethylene (VAE) i-RDPs, i-Acrylic RDPs, i-Styrene Butadiene (SB) i-RDPs, i-Vinyl Acetate (VA) i-RDPs, kunye ne-Ethylene Vinyl Chloride (EVC) i-RDPs. Uhlobo ngalunye lwe-RDP luneempawu zalo ezizodwa ezenza ukuba zilungele izicelo ezithile.