Gulu la Redispersible Polymer Powder (RDP)
Redispersible Polymer Powder (RDP) ndi mtundu wa ufa wa copolymer womwe umagwiritsidwa ntchito kwambiri pomanga zosiyanasiyana. Ma RDP amapangidwa ndi njira yotchedwa spray drying. Panthawiyi, chisakanizo cha ma monomers osungunuka m'madzi ndi zina zowonjezera zimayikidwa emulsified, ndiyeno madzi amachotsedwa kupyolera mu kuyanika kwa spray. Chotsatiracho ndi ufa womwe ukhoza kufalikira mosavuta m'madzi. Ma RDP ali ndi kumamatira kwabwino, kusinthasintha, komanso kukana madzi, zomwe zimawapangitsa kukhala abwino kugwiritsidwa ntchito pazinthu zambiri.
Kugawika kwa RDPs kumatengera zinthu zingapo, kuphatikiza kapangidwe kake, kachitidwe ka polymerization, ndi zomaliza za chinthucho. M'nkhaniyi, tikambirana za kagawidwe ka RDPs potengera kapangidwe kake ka mankhwala.
- Vinyl Acetate Ethylene (VAE) RDPs
Ma RDP a VAE ndi omwe amagwiritsidwa ntchito kwambiri pa RDPs. Amapangidwa ndi copolymerizing vinyl acetate (VA) ndi ethylene (E) pamaso pa ma monomers ena monga acrylate kapena methacrylate. Zomwe zili mu VA mu copolymer zimasiyana pakati pa 30% ndi 80%, kutengera zomwe akufuna. Ma VAE RDP amadziwika chifukwa cha zomatira zabwino kwambiri, kusinthasintha, komanso kukana madzi. Amagwiritsidwa ntchito kwambiri pomatira matailosi, ma skim coats, ndi ma putty.
- Akriliki RDPs
Acrylic RDPs amapangidwa ndi copolymerizing acrylic esters ndi ma monomers ena monga vinyl acetate, ethylene, kapena styrene. Ma acrylic esters omwe amagwiritsidwa ntchito mu copolymer amatha kukhala methyl methacrylate (MMA), butyl acrylate (BA), kapena kuphatikiza zonse ziwiri. Makhalidwe a acrylic RDPs amadalira chiŵerengero cha ma monomers omwe amagwiritsidwa ntchito mu ndondomeko ya copolymerization. Ma Acrylic RDPs amalimbana bwino ndi nyengo, ndipo amagwiritsidwa ntchito kwambiri popaka kunja, zotchingira madzi, ndi zokutira za simenti.
- Styrene Butadiene (SB) RDPs
Ma SB RDP amapangidwa ndi copolymerizing styrene ndi butadiene pamaso pa ma monomers ena monga acrylate kapena methacrylate. Zomwe zili mu styrene mu copolymer zimasiyana pakati pa 20% ndi 50%, kutengera zomwe akufuna. Ma SB RDP ali ndi zomatira zabwino kwambiri, ndipo amagwiritsidwa ntchito kwambiri pomatira matayala, matope, ndi ma grouts.
- Vinyl Acetate (VA) RDPs
VA RDPs amapangidwa ndi homopolymerizing vinyl acetate monomers. Amakhala ndi vinyl acetate wambiri, kuyambira 90% mpaka 100%. Ma VA RDPs ali ndi zomatira zabwino, ndipo amagwiritsidwa ntchito kwambiri pomatira matayala, zomangira zomangira, ndi zokutira za simenti.
- Ethylene Vinyl Chloride (EVC) RDPs
Ma EVC RDP amapangidwa ndi copolymerizing ethylene ndi vinyl chloride pamaso pa ma monomers ena monga acrylate kapena methacrylate. Zomwe zili mu vinyl chloride mu copolymer zimasiyana pakati pa 5% ndi 30%, kutengera zomwe akufuna. Ma EVC RDPs ali ndi kukana madzi abwino komanso kumamatira kwambiri kumadera osiyanasiyana. Amagwiritsidwa ntchito kwambiri pomatira matailosi, ma skim coats, ndi ma putty.
Pomaliza, RDPs ndi mtundu wofunikira wa ufa wa copolymer womwe umagwiritsidwa ntchito kwambiri pomanga zosiyanasiyana. Kugawika kwa RDPs kumachokera pazifukwa zingapo, kuphatikiza kapangidwe kake, kachitidwe ka polymerization, ndi zomaliza za chinthucho. Mankhwala a RDPs amatha kugawidwa mu Vinyl Acetate Ethylene (VAE) RDPs, Acrylic RDPs, Styrene Butadiene (SB) RDPs, Vinyl Acetate (VA) RDPs, ndi Ethylene Vinyl Chloride (EVC) RDPs. Mtundu uliwonse wa RDP uli ndi mawonekedwe ake apadera omwe amaupanga kukhala oyenera ntchito zinazake.
Ndikofunika kusankha mtundu woyenera wa RDP pa ntchito inayake kuti mupeze zotsatira zabwino. Zinthu zomwe ziyenera kuganiziridwa posankha RDP yoyenera ndi monga mtundu wa gawo lapansi, mphamvu zomatira zomwe mukufuna, kukana madzi, kusinthasintha, ndi kukana nyengo.
Kuphatikiza apo, ma RDP amatha kuphatikizidwa ndi zinthu zina monga simenti, mchenga, ndi zowonjezera zina kuti apange zinthu zogwira ntchito kwambiri monga zomatira matailosi, ma grouts, ma skim coat, ndi zokutira zakunja. Makhalidwe a chinthu chomaliza akhoza kusinthidwa mwa kusintha kuchuluka kwa RDP yogwiritsidwa ntchito ndi zina zopangira.
Mwachidule, ma RDP ndi mtundu wosinthika wa ufa wa copolymer womwe umapereka mphamvu zomatira bwino, kukana madzi, komanso kusinthasintha. Amagwiritsidwa ntchito kwambiri pomanga zosiyanasiyana, kuphatikiza zomatira matailosi, ma skim coats, ndi zokutira kunja. Kugawika kwa ma RDP kutengera kapangidwe kake ka mankhwala, komwe kumaphatikizapo ma VAE RDPs, ma acrylic RDPs, SB RDPs, VA RDPs, ndi EVC RDPs. Ndikofunikira kusankha RDP yoyenera pa pulogalamu inayake kuti mupeze zotsatira zabwino.
Nthawi yotumiza: Apr-15-2023