I-Thickener luhlobo olukhethekileyo lwe-rheological additive, umsebenzi walo oyintloko kukunyusa i-viscosity yolwelo lwepeyinti, ukuphucula ukusebenza kokugcinwa, ukusebenza kokwakhiwa kunye nefuthe lefilimu yepeyinti yepeyinti.
Indima ye-thickeners kwiingubo
jiya
Ukuchasana nokuhlaliswa
Into evikela amanzi
Ukuchasana nokudodobala
Anti ukushwabana
Ukuphucula ukusebenza kakuhle kokusasazwa
Ukuphucula ukusebenza kolwakhiwo
Yandisa ubukhulu befilimu yepeyinti
Phucula isiphumo somphezulu
Iimpawu zee-thickeners ezahlukeneyo
1. Inorganic thickener
Eyona nto isetyenziswa ngokuqhelekileyo yi-bentonite ephilayo, eyona nto iphambili i-montmorillonite. Isakhiwo sayo esikhethekileyo se-lamellar sinokunika i-coating kunye ne-pseudoplasticity enamandla, i-thixotropy, ukuzinza kokumiswa kunye ne-lubricity. Umgaqo we-thickening kukuba i-powder ithatha amanzi kwaye ihlume ukuze idibanise isigaba samanzi, ngoko inokugcinwa kwamanzi athile.
Ukungalungi zezi: ukuhamba kakubi kunye nokusebenza komgangatho, akukho lula ukusabalalisa kunye nokongeza.
2. Iselulosi ether
Eyona isetyenziswa ngokuqhelekileyoi-hydroxyethyl cellulose(HEC), enobuchule obuphezulu bokutyeba, ukunqunyanyiswa okulungileyo, ukusasazeka kunye neempawu zokugcina amanzi, ngokukodwa ukuqinisa isigaba samanzi.
Izinto ezingeloncedo zezi: zichaphazela ukuxhathisa kwamanzi okugquma, ukusebenza okungonelanga kokuchasana nokungunda, kunye nokusebenza kakubi komgangatho.
3. Acrylic
I-Acrylic thickeners yahlulahlulwe ngokubanzi ibe ziindidi ezimbini: i-acrylic alkali-swellable thickeners (ASE) kunye ne-associative alkali-swellable thickeners (HASE).
Umgaqo wokuqina we-acrylic acid alkali-swellable thickener (ASE) kukuqhawula i-carboxylate xa i-pH ilungelelaniswe kwi-alkaline, ukuze ikhonkco lemolekyuli lolule ukusuka kwi-helical ukuya kwintonga ngokusebenzisa isini esifanayo se-electrostatic repulsion phakathi kwee-ion ze-carboxylate. , ukuphucula i-Viscosity yesigaba samanzi. Olu hlobo lwe-thickener lukwanayo nokuqina okuphezulu, i-pseudoplasticity eyomeleleyo kunye nokumiswa okulungileyo.
I-alkali-swellable thickener ye-associative (HASE) yazisa amaqela e-hydrophobic ngesiseko se-alkali-swellable thickeners eziqhelekileyo (ASE). Ngokufanayo, xa i-pH ihlengahlengiswa kwi-alkaline, i-electrostatic repulsion yesini esifanayo phakathi kwe-carboxylate ions yenza I-molecular chain isuka kwi-helical shape ukuya kwi-rod shape, eyandisa i-viscosity yesigaba samanzi; kunye namaqela e-hydrophobic angeniswe kwi-chain chain angakwazi ukudibanisa kunye neengqungquthela ze-latex ukwandisa i-viscosity yesigaba se-emulsion.
Izinto ezingeloncedo zezi: ubuthathaka kwi-pH, ukuhamba okungonelanga kunye nomgangatho wefilimu yepeyinti, kulula ukujiya emva koko.
4. I-polyurethane
I-Polyurethane associative thickener (HEUR) yi-hydrophobically modified ethoxylated polyurethane water-soluble polymer, eye-non-ionic associative thickener. Iqukethe amacandelo amathathu: isiseko se-hydrophobic, i-hydrophilic chain kunye nesiseko se-polyurethane. Isiseko se-polyurethane sandisa kwisisombululo sepeyinti, kwaye ikhonkco le-hydrophilic lizinzile kwisigaba samanzi. Isiseko se-hydrophobic sinxulumana nezakhiwo ze-hydrophobic ezinje ngamasuntswana e-latex, i-surfactants, kunye ne-pigments. , ukwenza ulwakhiwo lwenethiwekhi ye-three-dimensional, ukwenzela ukufezekisa injongo yokuqina.
Ibonakaliswa ngokuqina kwesigaba se-emulsion, ukuhamba okugqwesileyo kunye nokusebenza komgangatho, ukusebenza kakuhle kokuqina kunye nokugcinwa okuzinzileyo kwe-viscosity, kwaye akukho mda we-pH; kwaye ineenzuzo ezicacileyo ekuchaseni amanzi, i-gloss, i-transparency, njl.
Ukungalungi oku: kwinkqubo ye-viscosity ephakathi kunye nephantsi, i-anti-setting effect kwi-powder ayilungile, kwaye umphumo wokuqina uchaphazeleka ngokulula ngama-dispersants kunye ne-solvents.
Ixesha lokuposa: Dec-12-2022