Polymer ntụ ntụ nwere ike agbasa (RDP)bụ ihe ntụ ntụ mere site na ihicha emulsion polymer, nke a na-ejikarị eme ihe dị ka ihe owuwu, mkpuchi, ihe nkpuchi, na ihe nkedo. Isi ọrụ ya bụ ịgbasa n'ime emulsion site n'ịgbakwụnye mmiri, na-enye ezigbo adhesion, elasticity, mmiri na-eguzogide mmiri, nkwụsị mgbawa, na nkwụsị ihu igwe.
Enwere ike nyochaa ihe mejupụtara nke Polymer Powder Redispersible (RDP) site n'ọtụtụ akụkụ, ọkachasị gụnyere ihe ndị a:
1. Polymer resin
Akụkụ bụ isi nke ntụ ntụ Polymer Redispersible bụ polymer resin, nke na-abụkarị polymer enwetara site na emulsion polymerization. Resin polymer a na-ahụkarị gụnyere:
Polyvinyl mmanya (PVA): nwere ezigbo nrapado na ihe na-emepụta ihe nkiri ma na-ejikarị eme ihe n'ụlọ.
Polyacrylates (dị ka polyacrylates, polyurethanes, wdg): nwere ezigbo ngbanwe, ike njikọta, na mgbochi mmiri.
Polystyrene (PS) ma ọ bụ ethylene-vinyl acetate copolymer (EVA): a na-ejikarị emezi ihe ndị na-emepụta ihe nkiri, na-abawanye nguzogide mmiri, na nguzogide ihu igwe.
Polymethyl methacrylate (PMMA): Nke a polima nwere ezigbo mgbochi ịka nká na nghọta.
Ndị a na-emepụta polymer resins na-etolite emulsions site na mmeghachi omume polymerization, mgbe ahụ, a na-ewepụ mmiri dị na emulsion site na ihicha ihicha ma ọ bụ ihicha ihicha, na n'ikpeazụ a na-enweta Redispersible Polymer Powder (RDP) n'ụdị ntụ ntụ.
2. Surfactants
Iji nọgide na-enwe nkwụsi ike n'etiti ihe ndị dị na polymer ma zere agglomeration na ntụ ntụ, a ga-agbakwunye ihe ndị na-emepụta ihe kwesịrị ekwesị n'oge usoro mmepụta. Ọrụ nke surfactants bụ iji belata esemokwu dị n'elu n'etiti ụmụ irighiri ihe ma nyere aka na-agbasa na mmiri. Surfactants ndị a na-ahụkarị gụnyere:
Ihe ndị na-abụghị ionic surfactants (dị ka polyether, polyethylene glycols, wdg).
Anionic surfactants (dị ka fatty acid salts, alkyl sulfonates, wdg).
Ndị a surfactants nwere ike welie dispersibility nke Redispersible Polymer Powder (RDP) s, ikwe ka latex ntụ ntụ regharịa emulsion mgbe agbakwunyere mmiri.
3. Fillers na thickeners
Iji dozie arụmọrụ nke powders latex ma belata ọnụ ahịa, enwere ike ịgbakwunye ụfọdụ ihe na-ejuputa na ihe nchara n'oge mmepụta. Enwere ọtụtụ ụdị nju, na ndị nkịtị gụnyere:
Calcium carbonate: ihe nchacha inorganic a na-ejikarị eme ihe nke nwere ike ịbawanye nrapado ma melite arụmọrụ.
Talc: nwere ike ịbawanye mmiri na mgbawa nke ihe.
Silicate mineral: dị ka bentonite, gbasaa graphite, wdg, nwere ike welie mgbape mgbochi na mmiri na-eguzogide nke ihe onwunwe.
A na-ejikarị ihe ndị na-emepụta ihe na-edozi viscosity nke ngwaahịa ahụ iji mee ka ọ dị iche iche na-ewu ụlọ. Ihe ndị a na-ahụkarị gụnyere hydroxypropyl methylcellulose (HPMC) na mmanya polyvinyl (PVA).
4. Onye na-eme ihe mgbochi
Na ngwaahịa ntụ ntụ, iji gbochie agglomeration n'oge nchekwa na njem, a pụkwara ịgbakwunye ndị na-eme ihe na-emepụta ihe n'oge mmepụta ihe. Anti-caking mmadụ bụ tumadi ụfọdụ ezi inorganic bekee, dị ka aluminum silicate, silicon dioxide, wdg Ndị a bekee nwere ike na-etolite a na-echebe film n'elu nke latex ntụ ntụ ahụ iji gbochie ahụ si agglomerating ọnụ.
5. Ihe mgbakwunye ndị ọzọ
Powder Polymer Redispersible (RDP) nwekwara ike ịnwe ụfọdụ mgbakwunye pụrụ iche iji melite akụrụngwa akọwapụtara:
Ihe na-egbochi UV: na-eme ka iguzogide ihu igwe na ike ịka nká nke ihe.
Ihe na-egbochi nje bacteria: na-ebelata uto nke microorganisms, karịsịa mgbe ejiri ya na gburugburu iru mmiri.
Plasticizer: na-eme ka mgbanwe na mgbape mgbape nke ntụ ntụ latex dịkwuo mma.
Mgbochi: Gbochie ihe ka ọ ghara ịjụ oyi na gburugburu ebe okpomọkụ dị ala, na-emetụta ihe nrụpụta na ojiji.
6. Mmiri
Ọ bụ ezie na Redispersible Polymer Powder (RDP) dị n'ụdị ntụ ntụ akọrọ, ọ na-achọkwa ụfọdụ nchịkwa mmiri n'oge usoro mmepụta, a na-achịkwakarịkwa ọdịnaya mmiri n'okpuru 1%. Ọdịnaya nke mmiri kwesịrị ekwesị na-enyere aka ịnọgide na-enwe mmiri na nkwụsi ike ogologo oge nke ntụ ntụ.
Ọrụ na arụmọrụ nke Redispersible Polymer Powder (RDP)
Ọrụ dị mkpa nke Redispersible Polymer Powder (RDP) bụ na enwere ike ịgbasa ya ka ọ bụrụ emulsion mgbe ọ gbakwụnye mmiri, ma nwee njirimara arụmọrụ ndị a:
Adhesion magburu onwe ya: Mee ka ikike nke mkpuchi na mkpuchi dị mma, ma melite ike njikọ n'etiti ihe ụlọ.
Ngbanwe na mgbanwe: Meziwanye ihe mkpuchi nke mkpuchi ahụ, mee ka nkwụsị mgbawa ya na nkwụsị mmetụta.
Mmiri na-eguzogide mmiri: Mee ka mmiri na-eguzogide ihe dị mma, nke kwesịrị ekwesị maka iji mee ihe n'èzí ma ọ bụ ebe iru mmiri.
Mgbochi ihu igwe: kwalite ihe mgbochi UV, mgbochi ịka nká na ihe ndị ọzọ, wee gbasaa ndụ ọrụ ya.
Nguzogide mgbawa: Ọ nwere ezigbo nguzogide mgbape ma dabara adaba maka mkpa mgbochi mgbawa na ọrụ owuwu.
RDPA na-eme ya site n'ịgbanwe emulsion polymer n'ime ntụ ntụ site na usoro ọkaibe. Ọ nwere ọtụtụ ihe magburu onwe ya ma na-ejikarị arụ ọrụ, mkpuchi, adhesives na ubi ndị ọzọ. Nhọrọ na oke nke ihe mejupụtara ya na-emetụta arụmọrụ ikpeazụ ya ozugbo.
Oge nzipu: Mar-11-2025