Starch ether inonyanya kushandiswa mukuvaka dhaka, iyo inogona kukanganisa kuenderana kwedhaka rakavakirwa gypsum, simende uye lime, uye kushandura kuvaka uye sag kuramba kwedhaka. Starch ethers inowanzoshandiswa pamwe chete neasina-modified uye modified cellulose ethers. Inokodzera ese ari maviri asina kwaakarerekera uye alkaline masisitimu, uye inoenderana neakawanda ekuwedzera mune gypsum uye simende zvigadzirwa (senge masurfactants, MC, starch uye polyvinyl acetate uye mamwe mapolymer anonyungudika nemvura).
Hunhu hwe starch ether kunyanya sepazasi:
(1) Kuvandudza sag resistance;
(2) Kuvandudza kuvakwa;
(3) Kuwanda kwedhaka goho.
Ndeipi basa guru re starch ether mu gypsum-based dry mortar?
Mhinduro: Starch ether ndeimwe yezvinowedzera zvinowedzera zvehupfu hwakaoma dhaka. Inogona kuenderana nezvimwe zvinowedzera. Inoshandiswa zvakanyanya mumatairi anonamira, kugadzirisa dhaka, plastering gypsum, mukati nekunze madziro putty, gypsum-based caulking uye kuzadza zvinhu, interface agents, masonry Mumatope, inokodzerawo ruoko kana kupfapfaidza application nesamende-based kana gypsum. -based mortars. Inoshanda sezvinotevera:
(1) Starch ether inowanzoshandiswa pamwe chete nemethyl cellulose ether, iyo inoratidza yakanaka synergistic effect pakati pezviviri. Kuwedzera huwandu hwakakodzera hwe starch ether kune methyl cellulose ether inogona kuvandudza zvakanyanya sag resistance uye kutsvedza kuramba kwedhaka, ine goho rakakura.
(2) Kuwedzera huwandu hwakakodzera hwe starch ether kudhaka rine methyl cellulose ether kunogona kuwedzera zvakanyanya kuenderana kwedhaka, kunatsiridza kuyerera, uye kuita kuti chivakwa chive chakatsetseka uye chakatsetseka.
(3) Kuwedzera huwandu hwakakodzera hwe starch ether kudhaka rine methyl cellulose ether kunogona kuwedzera kuchengetwa kwemvura kwedhaka uye kuwedzera nguva yakazaruka.
Ndeapi mabhenefiti ekushandisa uye nzira dzekuchengetedza dze starch ether?
Mhinduro: Inogona kushandiswa semusanganiswa wesimende-based products, gypsum-based products uye ash-calcium zvigadzirwa.
(1) Zvakanakira uye mashandisirwo:
a. Iyo ine kukora mhedzisiro padhaka, inogona kukora nekukurumidza, uye ine lubricity yakanaka;
b. Iyo dosage idiki, uye yakaderera dosi inogona kuwana yakakwirira mhedzisiro;
c. Kuvandudza iyo anti-slide kugona kweakasungwa dhaka;
d. kuwedzera nguva yakazaruka yezvinhu;
e. Kuvandudza mashandiro ekushandisa kwezvinhu uye kuita kuti basa rive nyore.
(2) Kuchengeta:
Chigadzirwa chacho chinokanganisa kunyorova uye chinofanira kuchengetwa munzvimbo yakaoma uye inotonhorera mune yekutanga kurongedza. Zviri nani kuishandisa mukati memwedzi gumi nemiviri. (Inokurudzirwa kushandiswa pamwe chete ne-high-viscosity cellulose ether, uye chiyero cheseruserose ether kune starch ether i7: 3~8: 2)
Ndeipi basa remethyl cellulose ether muvhu rakaoma dhaka?
A: Methyl hydroxyethyl cellulose ether (MHEC) uye methyl hydroxypropyl cellulose ether (HPMC) pamwe chete inonzi methyl cellulose ether.
Mumunda wehupfu hwakaoma dhaka, methyl cellulose ether yakakosha yakagadziridzwa dhaka rehupfu hwakaoma senge plastering dhaka, plastering gypsum, mataira adhesive, putty, self-leveling zvinhu, pfapfaidzo dhaka, wallpaper adhesive uye caulking zvinhu. Mumadhaka akasiyana ehupfu hwakaoma, methyl cellulose ether inonyanya kuita basa rekuchengetedza mvura uye kukora.
Ndeipi nzira yekugadzira cellulose ether?
Mhinduro: Chekutanga, iyo cellulose mbishi zvinhu inopwanyika, yobva yaiswa alkali uye pulped pasi pechiito che caustic soda. Wedzera olefin oxide (yakadai se ethylene oxide kana propylene oxide) uye methyl chloride ye etherification. Pakupedzisira, kugezwa kwemvura uye kucheneswa kunoitwa kuti pakupedzisira uwane hupfu chena. Iyi poda, kunyanya mhinduro yayo ine aqueous, ine zvinhu zvinonakidza zvemuviri. Iyo cellulose ether inoshandiswa muindasitiri yekuvaka imethyl hydroxyethyl cellulose ether kana methyl hydroxypropyl cellulose (yakapfupikiswa seMHEC kana MHPC, kana zita rakarerutswa MC). Ichi chigadzirwa chinoita basa rakakosha mumunda wehupfu hwakaoma dhaka. basa rinokosha.
Nguva yekutumira: Jan-30-2023