Redispersible latex ntụ ntụ bụ emulsion pụrụ iche dabere na mmiri na ihe nkedo polymer mere site na ịgbasa vinyl acetate-etylene copolymer dị ka isi akụrụngwa. Mgbe akụkụ nke mmiri na-ekpochapụ, ihe ndị na-emepụta ihe na-emepụta ihe nkiri polymer site na agglomeration, nke na-arụ ọrụ dị ka ihe nkedo. Mgbe a na-eji ntụ ntụ latex na-agbanwe agbanwe yana mineral gelling inorganic dị ka ciment, ọ nwere ike gbanwee ngwa agha ahụ. Ọrụ bụ isi nke ntụ ntụ latex redispers bụ ndị a.
(1) Meziwanye ike nkekọ, ike nkwụsị na ike ịgbagọ.
Uzuzu latex na-agbanwe agbanwe nwere ike imeziwanye ike nke ngwa ngwa. Ọnụ ego agbakwunyere ka ukwuu, na-ebuli elu. Ike njikọ dị elu nwere ike igbochi nkwụsịtụ ruo n'ókè ụfọdụ, ma n'otu oge ahụ, nrụgide na-akpata site na nrụrụ dị mfe ịgbasa na ntọhapụ, ya mere ike njikọ dị ezigbo mkpa maka imeziwanye nkwụsị mgbape. Nnyocha e mere egosiwo na mmetụta synergistic nke cellulose ether na polymer ntụ ntụ na-enyere aka imeziwanye ike njikọ nke ciment mortar.
(2) Belata modul na-agbanwe nke ngwa agha ahụ, nke mere na ngwa ngwa ciment na-agbaji agbaji nwere ogo mgbanwe ụfọdụ.
Ụdị ngbanwe nke ntụ ntụ latex redispersible dị ala, 0.001-10GPa; ebe modul na-agbanwe nke ngwa ngwa ciment dị elu, 10-30GPa, ya mere ngbanwe nke igwe ciment ga-ebelata na mgbakwunye nke ntụ ntụ polymer. Otú ọ dị, ụdị na ego nke polymer ntụ ntụ nwekwara mmetụta na modul nke elasticity. N'ozuzu, ka oke nke polymer na ciment na-abawanye, modul nke elasticity na-ebelata na nrụrụ na-abawanye.
(3) Meziwanye nguzogide mmiri, nguzogide alkali, nguzogide abrasion na nguzogide mmetụta.
Ihe owuwu netwọkụ nke emere site na polymer na-emechi oghere na mgbawa na ngwa ngwa ciment, na-ebelata porosity nke ahụ siri ike, ma si otú a na-eme ka enweghị ike, mmiri na-eguzogide mmiri na ntu oyi nke nkume ciment. Mmetụta a na-abawanye site na mmụba polymer-ciment ruru. Ọganihu nke nguzogide eyi na-ejikọta ụdị ntụ ntụ polymer na oke nke polymer na ciment. N'ozuzu, iyi nguzogide na-akawanye mma ka oke nke polymer na ciment na-abawanye.
(4) Meziwanye mmiri na ịrụ ọrụ nke ngwa agha.
(5) Meziwanye njigide mmiri nke ngwa agha ma belata evaporation mmiri.
The polima emulsion kpụrụ site dissolving redispersible polymer ntụ ntụ na mmiri na-agbasasị na ngwa agha, na a na-aga n'ihu organic film na-guzobere na ngwa agha mgbe solidification. Ihe nkiri a na-ahụ anya nwere ike igbochi ịkwaga mmiri, si otú ahụ belata mfu mmiri na ngwa agha ma na-ekere òkè na njide mmiri.
(6) Belata ihe mgbawa
Mgbatị na ịdị ike nke ụrọ ciment gbanwere polymer dị mma karịa ngwa ngwa ciment nkịtị. Arụmọrụ na-agbanwe agbanwe karịa okpukpu abụọ nke ụrọ ciment nkịtị; mmetụta siri ike na-abawanye na mmụba nke cement cement polymer. Site n'ịbawanye ụba nke ntụ ntụ polymer agbakwunyere, mmetụta nkwụsịtụ na-agbanwe agbanwe nke polymer nwere ike igbochi ma ọ bụ gbuo oge mmepe nke mgbawa, ma n'otu oge ahụ ọ na-enwe mmetụta nkesa nrụgide dị mma.
Oge nzipu: Jun-20-2023