Etherified starch yog cov hmoov txhuv nplej siab hloov ether tsim los ntawm cov tshuaj tiv thaiv ntawm pawg hydroxyl hauv cov hmoov txhuv nplej siab nrog cov tshuaj reactive, suav nrog hydroxyalkyl starch, carboxymethyl starch, thiab cationic starch.Txij li thaum etherification ntawm starch txhim kho cov viscosity stability thiab ether daim ntawv cog lus yog tsis yooj yim hydrolyzed nyob rau hauv muaj zog alkaline tej yam kev mob, etherified starch yog siv nyob rau hauv ntau yam industrial teb.Carboxymethyl starch (CMS) yog ib daim ntawv denatured ntawm anionic natural khoom thiab ib tug natural polymer polyelectrolyte ether soluble nyob rau hauv dej txias.Tam sim no, cMS tau siv dav hauv zaub mov, tshuaj, roj av, tshuaj niaj hnub, textile, papermaking, adhesives, thiab xim industries.tus
Hauv kev lag luam khoom noj khoom haus, CMS tsis muaj tshuaj lom thiab tsis muaj teeb meem rau tib neeg lub cev thiab tuaj yeem siv los ua kev txhim kho zoo.Cov khoom tiav tau zoo heev, xim thiab saj, ua kom du, tuab thiab pob tshab;CMS kuj tseem siv tau los ua zaub mov noj.Hauv kev lag luam tshuaj, CMS yog siv los ua ntsiav tshuaj disintegrant, plasma ntim expander, thickener rau ncuav mog qab zib hom kev npaj thiab tshuaj dispersant rau qhov ncauj suspoemulsion.CMS tau siv dav hauv kev lag luam roj av ua cov av nkos poob qis.Nws muaj ntsev tsis kam, tuaj yeem tiv taus ntsev kom saturation, thiab muaj kev tiv thaiv kev poob qis thiab muaj peev xwm tiv thaiv calcium.Nws yog ib qho zoo heev kua poob reducer.Txawm li cas los xij, vim qhov tsis zoo ntawm qhov kub thiab txias, nws tsuas yog siv tau rau hauv qhov dej ntiav ntiav xwb.CMS yog siv rau lub teeb yarn sizing, thiab muaj cov yam ntxwv ntawm ceev dispersion, zoo zaj duab xis-tsim khoom, mos loj zaj duab xis, thiab yooj yim desizing.CMS kuj tseem siv tau los ua tus tackifier thiab hloov kho hauv ntau yam luam ntawv thiab dyeing formulations.CMS yog siv los ua cov nplaum rau hauv cov ntawv txheej, uas tuaj yeem ua rau cov txheej txheem muaj kev sib tw zoo thiab viscosity stability.Nws cov dej tuav cov khoom tswj kev nkag mus ntawm cov nplaum rau hauv cov ntawv hauv paus, muab cov ntawv coated zoo luam ntawv zoo.Tsis tas li ntawd, CMS kuj tseem tuaj yeem siv los ua cov viscosity reducer rau cov thee slurry thiab roj-coal sib xyaw roj slurry, kom nws muaj qhov zoo ntawm kev ncua emulsion stability thiab fluidity.Nws kuj tseem tuaj yeem siv los ua cov tackifier rau cov xim pleev xim dej, cov tshuaj chelate rau cov dej phwj hnyav, thiab cov tshuaj ntxuav tawv nqaij hauv cov tshuaj pleev ib ce.Nws lub cev muaj zog yog raws li nram no:
PH tus nqi: Alkaline (5% aqueous tov) Solubility: tuaj yeem yaj hauv dej txias Fineness: Tsawg dua 500μm Viscosity: 400-1200mpas (5% aqueous tov) Compatibility nrog rau lwm cov ntaub ntawv: Zoo nrog lwm cov khoom siv hauv tsev admixtures Compatibility
1. Lub luag haujlwm tseem ceeb
Zoo heev ceev thickening peev xwm: nruab nrab viscosity, siab dej tuav;
Cov koob tshuaj me me, thiab qhov ntau npaum li cas tuaj yeem ua tiav cov txiaj ntsig siab;
Txhim kho lub peev xwm los tiv thaiv sag ntawm cov khoom nws tus kheej;
Nws muaj lubricity zoo, uas tuaj yeem txhim kho kev ua haujlwm ntawm cov khoom siv thiab ua rau kev ua haujlwm smoother.tus
2. Scope ntawm kev siv
Cov hmoov txhuv nplej siab ether yog tsim rau txhua yam ntawm (cement, gypsum, txiv qaub-calcium) sab hauv thiab sab nrauv phab ntsa putty, thiab txhua yam ntawm mortar thiab plastering mortar.Pom zoo npaum li cas: 0.05% -0.15% ( ntsuas hauv tons), kev siv tshwj xeeb yog raug rau qhov sib piv.Nws tuaj yeem siv los ua cov khoom sib xyaw rau cov khoom siv cement, cov khoom siv gypsum thiab cov khoom txiv qaub-calcium.Cov hmoov txhuv nplej siab ether muaj kev sib raug zoo nrog lwm cov kev tsim kho thiab cov khoom sib xyaw;nws yog qhov tshwj xeeb tshaj yog tsim rau kev tsim cov khoom sib xyaw qhuav xws li tshuaj khib, nplaum, plastering thiab dov cov ntaub ntawv.Cov hmoov txhuv nplej siab ethers thiab methyl cellulose ethers (Tylose MC qib) yog siv ua ke hauv kev tsim kho cov khoom sib xyaw kom pom cov thickening ntau dua, cov qauv muaj zog, sag kuj thiab yooj yim ntawm kev tuav.Lub viscosity ntawm mortars, adhesives, plasters thiab yob renders uas muaj ntau dua methyl cellulose ethers yuav txo tau los ntawm kev ntxiv ntawm starch ethers.tus
3. Kev faib cov hmoov txhuv nplej siab ethers
Cov hmoov txhuv nplej siab ethers siv hauv mortars yog hloov kho los ntawm ntuj polymers ntawm qee cov polysaccharides.Xws li qos yaj ywm, pob kws, cassava, taum guar thiab hais txog.tus
General modified starch
Cov hmoov txhuv nplej siab ether hloov los ntawm qos yaj ywm, pob kws, cassava, thiab lwm yam tau txo qis dej ntau dua li cellulose ether.Vim qhov sib txawv ntawm kev hloov kho, qhov ruaj khov rau cov kua qaub thiab alkali sib txawv.Qee cov khoom tsim nyog siv rau hauv gypsum-raws li mortars, thaum lwm tus tuaj yeem siv rau hauv cov cement-based mortars.Daim ntawv thov cov hmoov txhuv nplej siab ether hauv mortar feem ntau yog siv los ua cov thickener los txhim kho cov cuab yeej tiv thaiv sagging ntawm mortar, txo cov adhesion ntawm cov khib nyiab ntub dej, thiab ua kom lub sijhawm qhib.Cov hmoov txhuv nplej siab ethers feem ntau siv ua ke nrog cellulose, yog li ntawd cov khoom thiab qhov zoo ntawm ob yam khoom no ntxiv rau ib leeg.Txij li cov hmoov txhuv nplej siab ether cov khoom lag luam pheej yig dua li cellulose ether, daim ntawv thov cov hmoov txhuv nplej siab ether hauv mortar yuav ua rau txo qis ntawm cov nqi ntawm cov tshuaj mortar.tus
ua ether
Guar gum ether yog ib hom hmoov txhuv nplej siab ether nrog cov khoom tshwj xeeb, uas tau hloov kho los ntawm ntuj guar taum.Feem ntau los ntawm etherification cov tshuaj tiv thaiv ntawm guar gum thiab acrylic functional pawg, ib tug qauv uas muaj 2-hydroxypropyl functional pawg yog tsim, uas yog ib tug polygalactomannose qauv.
(1) Piv nrog cellulose ether, guar gum ether yog ntau soluble hauv dej.Tus nqi pH yeej tsis cuam tshuam rau kev ua haujlwm ntawm guar ethers.tus
(2) Nyob rau hauv cov kev mob uas tsis tshua muaj viscosity thiab tsawg npaum li cas, guar pos hniav tuaj yeem hloov cellulose ether hauv qhov sib npaug, thiab muaj cov dej zoo sib xws.Tab sis qhov sib xws, anti-sag, thixotropy thiab lwm yam yog pom tseeb txhim kho.(3) Nyob rau hauv cov xwm txheej ntawm cov viscosity siab thiab ntau npaum li cas, guar gum tsis tuaj yeem hloov cellulose ether, thiab kev siv sib xyaw ntawm ob yuav ua rau muaj kev ua tau zoo dua.
(4) Daim ntawv thov ntawm cov pos hniav hauv gypsum-raws li mortar tuaj yeem txo qhov adhesion thaum lub sij hawm tsim kho thiab ua rau kev tsim kho smoother.Nws tsis muaj qhov cuam tshuam rau lub sijhawm teeb tsa thiab lub zog ntawm gypsum mortar.tus
(5) Thaum guar cov pos hniav siv hauv cov cement-based masonry thiab plastering mortar, nws tuaj yeem hloov cellulose ether hauv qhov sib npaug, thiab muab cov mortar zoo dua sagging, thixotropy thiab smoothness ntawm kev tsim kho.tus
(6) Guar cov pos hniav kuj tseem siv tau rau hauv cov khoom xws li cov pobzeb nplaum, cov tshuaj tiv thaiv tus kheej hauv av, dej-resistant putty, thiab polymer mortar rau phab ntsa rwb thaiv tsev.tus
(7) Vim tias tus nqi ntawm cov pos hniav yog qis dua li ntawm cellulose ether, kev siv cov pos hniav hauv mortar yuav txo tus nqi ntawm cov khoom tsim.tus
Hloov cov ntxhia dej khaws cia thickener
Cov dej-retaining thickener ua los ntawm natural minerals los ntawm kev hloov kho thiab compounding tau siv nyob rau hauv Suav teb.Cov zaub mov tseem ceeb uas siv los npaj cov dej tuav cov thickeners yog: sepiolite, bentonite, montmorillonite, kaolin, thiab lwm yam. Cov zaub mov no muaj qee yam dej tuav thiab thickening zog los ntawm kev hloov kho xws li coupling agents.Hom dej-retaining thickener siv rau mortar muaj cov yam ntxwv hauv qab no.tus
(1) Nws tuaj yeem txhim kho kev ua tau zoo ntawm cov mortar zoo tib yam, thiab daws cov teeb meem ntawm kev ua haujlwm tsis zoo ntawm cov cement mortar, tsis muaj zog ntawm cov mortar sib xyaw, thiab cov dej tsis zoo.tus
(2) Cov khoom siv khib nyiab nrog ntau qib sib txawv rau kev lag luam thiab pej xeem vaj tse tuaj yeem tsim tau.tus
(3) Cov khoom siv tus nqi qis dua li ntawm cellulose ether thiab starch ether.
(4) Cov dej tuav tau qis dua li ntawm cov organic dej tuav tus neeg sawv cev, cov nqi qhuav ntawm cov tshuaj khib nyiab yog qhov loj dua, thiab qhov cohesiveness yog txo.tus
4. Kev siv cov hmoov txhuv nplej siab ether
Cov hmoov txhuv nplej siab ether feem ntau yog siv hauv kev tsim mortar, uas tuaj yeem cuam tshuam qhov sib xws ntawm mortar raws li gypsum, cement thiab txiv qaub, thiab hloov kev tsim kho thiab sag kuj ntawm mortar.Cov hmoov txhuv nplej siab ethers feem ntau yog siv ua ke nrog cov tsis hloov pauv thiab hloov kho cellulose ethers.Nws yog haum rau ob qho tib si nruab nrab thiab alkaline systems, thiab yog sib xws nrog feem ntau additives nyob rau hauv gypsum thiab cement khoom (xws li surfactants, MC, starch thiab dej-soluble polymers xws li polyvinyl acetate).
Cov yam ntxwv tseem ceeb:
(1) Cov hmoov txhuv nplej siab ether feem ntau yog siv ua ke nrog methyl cellulose ether, uas qhia tau hais tias muaj txiaj ntsig zoo ntawm ob qho tib si.Ntxiv qhov tsim nyog ntawm cov hmoov txhuv nplej siab ether rau methyl cellulose ether tuaj yeem txhim kho qhov sag kuj thiab plam tsis kam ntawm mortar, nrog rau cov txiaj ntsig siab.tus
(2) Ntxiv qhov tsim nyog ntawm cov hmoov txhuv nplej siab ether rau hauv cov tshuaj khib nyiab uas muaj methyl cellulose ether tuaj yeem ua rau muaj qhov sib xws ntawm cov mortar thiab txhim kho cov dej ntws zoo, ua rau kev tsim kho smoother thiab scraping smoother.(3) Ntxiv qhov tsim nyog ntawm cov hmoov txhuv nplej siab ether rau hauv mortar uas muaj methyl cellulose ether tuaj yeem ua rau kom cov dej tuav ntawm cov tshuaj khib thiab ua kom lub sijhawm qhib.tus
(4) Cov hmoov txhuv nplej siab ether yog cov tshuaj hloov pauv cov hmoov txhuv nplej siab ether soluble hauv dej, sib xws nrog lwm cov khoom ntxiv hauv cov hmoov qhuav mortar, dav siv hauv cov nplais nplaum, kho cov mortars, plastering plasters, sab hauv thiab sab nrauv phab ntsa putty, gypsum-raws li embedded Joints thiab sau cov ntaub ntawv. , interface agents, masonry mortar.
Cov yam ntxwv ntawm cov hmoov txhuv nplej siab ether feem ntau nyob hauv: ⑴txhim kho sag kuj;⑵ txhim kho kev tsim kho;⑶ nce mortar tawm los, pom zoo noj: 0.03% mus rau 0.05%.
Post lub sij hawm: Feb-16-2023