Thickener imhando yakakosha ye rheological additive, basa rayo guru nderekuwedzera viscosity yependi yemvura, kuvandudza mashandiro ekuchengetedza, kuita kwekuvaka uye pendi firimu mhedzisiro yepende.
Basa rema thickeners mumajasi
thicken
Anti-kugadzirisa
Isingapindi mvura
Anti-sagging
Anti shrinkage
Vandudza kushanda zvakanaka kwekuparadzira
Kuvandudza kushanda kwekuvaka
Wedzera pendi firimu ukobvu
Kuvandudza maitiro epamusoro
Hunhu hweakasiyana thickeners
1. Inorganic thickener
Inonyanya kushandiswa ndeye organic bentonite, iyo chikamu chikuru montmorillonite. Yayo lamellar yakakosha dhizaini inogona kupa iyo yekuvhara neakasimba pseudoplasticity, thixotropy, kumiswa kugadzikana uye lubricity. Nheyo yekukora ndeyekuti poda inotora mvura uye inoputika kuti iwedzere chikamu chemvura, saka ine kumwe kuchengetwa kwemvura.
Izvo zvisingabatsiri ndezvi: kuyerera kwakashata uye kuenzana kwekuita, hazvisi nyore kuparadzira nekuwedzera.
2. Cellulose ether
Inonyanya kushandiswa ndeyehydroxyethyl cellulose(HEC), iyo ine yakakwira thickening kunyatsoita, kumira zvakanaka, kupararira uye kuchengetedza mvura zvivakwa, kunyanya mukukora chikamu chemvura.
Izvo zvisingabatsiri ndezvi: kukanganisa kumira kwemvura kwekuputira, kusakwana kwekuita anti-mold, uye kusasimba kwekuita.
3. Acrylic
Acrylic thickeners anowanzo kupatsanurwa mumhando mbiri: acrylic alkali-swellable thickeners (ASE) uye associative alkali-swellable thickeners (HASE).
Iyo gobvu musimboti weiyo acrylic acid alkali-swellable thickener (ASE) ndeyekuparadzanisa iyo carboxylate kana pH yagadziriswa kuita alkaline, kuitira kuti molecular cheni inotambanudzwa kubva kuhelical kuenda kutsvimbo kuburikidza neiyo-se-sex electrostatic repulsion pakati pecarboxylate ions. , kuvandudza iyo The viscosity yechikamu chemvura. Iri rudzi rwekukora zvakare rine yakakwira thickening kunyatsoita, yakasimba pseudoplasticity uye yakanaka kumiswa.
Iyo associative alkali-swellable thickener (HASE) inosuma hydrophobic mapoka pahwaro hweakajairwa alkali-swellable thickeners (ASE). Saizvozvo, kana iyo pH inogadziriswa kune alkaline, iyo imwechete-yepabonde electrostatic repulsion pakati pecarboxylate ions inoita Iyo molecular chain inotambanudza kubva kune helical shape kusvika kune tsvimbo chimiro, iyo inowedzera viscosity yechikamu chemvura; uye mapoka e-hydrophobic akaunzwa pamaketani makuru anogona kushamwaridzana ne latex particles kuti awedzere viscosity ye emulsion phase.
Zvakaipa ndezvi: kunzwira pH, kusakwana kuyerera uye kuenzana kwefirimu repende, nyore kukora mushure.
4. Polyurethane
Polyurethane associative thickener (HEUR) inonzi hydrophobically modified ethoxylated polyurethane water-soluble polymer, inova isiri-ionic associative thickener. Iyo ine zvikamu zvitatu: hydrophobic base, hydrophilic chain uye polyurethane base. Iyo polyurethane base inowedzera mupendi mhinduro, uye iyo hydrophilic chain yakagadzikana muchikamu chemvura. Iyo hydrophobic base inoshamwaridzana neiyo hydrophobic zvimiro senge latex particles, surfactants, uye pigments. , kugadzira matatu-dimensional network chimiro, kuitira kuti uwane chinangwa chekukora.
Iyo inoratidzirwa nekukora kweiyo emulsion chikamu, kuyerera kwakanyanya uye kuenzanisa kuita, kunaka kukora kusimba uye kugadzikana kwakanyanya viscosity kuchengetedza, uye hapana pH muganho; uye ine zvikomborero zviri pachena mukudzivisa mvura, kupenya, kujekesa, nezvimwewo.
Izvo zvisingabatsiri ndezvi: mukati mepakati uye yakaderera viscosity system, iyo inopesana-kugadzirisa mhedzisiro paupfu haina kunaka, uye iyo thickening mhedzisiro inobatwa nyore nyore nevanoparadzira uye zvinonyungudutsa.
Nguva yekutumira: Zvita-12-2022