Kedu ihe bụ ntụ ntụ emulsion redispersible?

Redispersible emulsion ntụ ntụ (RDP), makwaara dị ka redispersible polymer ntụ ntụ, bụ powdered ụdị nke a mmiri dabeere emulsion polima. A na-emepụta ya site na ịgbasa ngwakọta nke mgbasa ozi polymer, na-adaberekarị na vinyl acetate-ethylene (VAE) ma ọ bụ vinyl acetate-versatile (VAC/VeoVa) copolymers, yana ihe mgbakwunye dị iche iche dị ka colloid nchebe, surfactants, na plasticizers.

Nke a bụ ka esi emepụta ntụ ntụ emulsion na-agbanwe agbanwe yana njirimara ya:

Usoro mmepụta:

1. Polymer Emulsion: A na-akwadebe emulsion polymer site na polymerizing monomers dị ka vinyl acetate, ethylene, na ndị ọzọ comonomers n'ihu mmiri na emulsifiers. Usoro a na-eme ka e nwee obere ihe ndị na-esi na polymer gbasasịa n'ime mmiri.
2. Mgbakwunye ihe mgbakwunye: Enwere ike ịgbakwunye ihe mgbakwunye dị ka colloid nchebe, surfactants, na plasticizers na emulsion iji gbanwee akụrụngwa na arụmọrụ ya.
3. Ịkpọsa mmiri: A na-etinye polymer emulsion n'ime igwe na-ekpo ọkụ, ebe a na-etinye ya n'ime obere ụmụ irighiri mmiri ma kpoo ya site na iji ikuku ọkụ. Dị ka mmiri na-ekpochapụ, ihe siri ike nke polymer na-emepụta, na-eme ka ntụ ntụ na-efu efu.
4. Mkpokọta na nkwakọ ngwaahịa: A na-anakọta ntụ ntụ a mịrị amị site na ala nke igwe nkụ, sie ya iji wepụ ihe ọ bụla buru ibu, wee chịkọta ya maka nchekwa na njem.

Njirimara ndị bụ isi:

1. Oke urughuru Size: Redispersible emulsion ntụ ntụ a mejupụtara nke okirikiri ahụ na diameters sitere na si a ole na ole micrometers iri iri nke micrometers, dabere na kpọmkwem n'ichepụta usoro na nhazi.
2. Redispersibility mmiri: Otu n'ime njirimara kachasị mkpa nke RDP bụ ikike ya ịgbasa na mmiri iji mepụta emulsion kwụsiri ike mgbe agwakọta ya na mmiri. Nke a na-enye ohere maka ntinye dị mfe n'ime usoro mmiri dị ka ngwa agha, nrapado, na mkpuchi.
3. Ọdịnaya Polymer: RDP n'ozuzu nwere nnukwu ọdịnaya nke ihe siri ike polymer, na-abụkarị site na 50% ruo 80% site n'ịdị arọ, dabere n'ụdị polymer na nhazi.
4. Ngwakọta kemịkalụ: Ngwakọta kemịkalụ nke RDP dịgasị iche dabere n'ụdị polymer ejiri yana mgbakwunye ọ bụla agbakwunyere n'oge usoro nrụpụta. Ndị polymer a na-ejikarị na RDP gụnyere vinyl acetate-ethylene (VAE) copolymers na vinyl acetate-versatile (VAC/VeoVa) copolymers.
5. Njirimara Arụmọrụ: RDP na-enye ọtụtụ ihe ndị a na-achọsi ike na nhazi, gụnyere mma mmachi, mgbanwe, mmiri na-eguzogide, na ịdịte aka. Ọ na-eme ka arụ ọrụ, ike arụ ọrụ, na ịrụ ọrụ nke ihe owuwu dị iche iche dị ka ngwa agha, adhesives tile, renders, na nhazi nke onwe.

Na nchịkọta, redispersible emulsion ntụ ntụ (RDP) bụ vasatail powdered ụdị nke mmiri dabeere emulsion polymers eji dị ka ihe mgbakwunye dị iche iche ewu na ulo oru ngwa. Ikike ya ịgbasa na mmiri, ọdịnaya polymer dị elu, na ihe ndị a na-achọsi ike na-arụ ọrụ na-eme ka ọ bụrụ ihe dị mkpa na nhazi nke ihe ụlọ dị elu na nke na-adịgide adịgide.