Hydroxyethyl Methyl Cellulose HemcPotest adhiberi sicut colloid tutela agente, emulsifier et dispersant ex eius superficiem activae munus in aqueum solutio. Exemplum de eius application est ut sequitur: et effectus hydroxyethyl methyl Cellulose in proprietatibus cementum. Hydroxyethyl methylcellosus est odorless, insipidum, nontoxic albus pulveris, quod solvit in frigore aqua ad formare patet, viscosa solutio. Is est proprietatibus crasso, binding, dispersio, emulsifying, film-format, suspending, adsorbing, gelling, superficies activae, retinens humorem et protegens colloids. Ob ad superficiem activae munus aqueum solutio, quod potest esse sicut colloid tutela agente, quod emulsifier et dispersant. Hydroxyethyl Methyl cellulosis aqueum solutio habet bonum hydrophilicity et est summus efficientiam aqua, retinendi agente.
praeparto
A modum parat hydroxyethyl methyl cellulosose, modum complectitur per probatos bombacio sicut rudis materiam et ethylene cadmiae sicut etheringing agens parareHydroxyethyl Methyl Cellulose. Rudis materiae parare hydroxyethyl methyl Cellulose parantur in partes pondus 700-800 partibus mixtisque Toluene et Isopropanol solvendo, 30-40 partes aquae, 70-80 partes sodium hydroxide, 80-85 partes Exertus bombacio, 20-28 partes Oxyethane, 80-90 partes methyl chloride et 16-19 partes glacial acetic acidum; In specifica gradus sunt:
Primum gradum, in reactor, addere toluene et isopropanol mixtisque, aquam et sodium hydroxide, erit calefactionem usque ad LX ~ LXXX ℃, ut incubated XX ~ XL minuta;
The second step, alkalization: cool the above materials to 30～50℃, add refined cotton, spray the mixture of toluene and isopropanol with solvent, evacuate to 0.006Mpa, fill with nitrogen for 3 replacements, and carry out alkali after replacement The alkalization Condiciones sunt ut sequitur: Alkalization tempus est II horis et alcalization temperatus est XXX ° C ad L ° C;
Tertium gradum, Etheramification: et alcalization perficitur, reactor est evacuata ad 0.05 ~ 0.07MPA, ethylene cadmiae et methyl chloride sunt additae et tenentur ad XXX ~ L minutes; Primum scaena de Ethemation: XL ~ LX ℃, 1.0 ~ 2.0 hora, pressura est regitur inter 0.15.3MPA; Secundum scaena etherification: LX ~ XC ℃, 2.0 ~ 2.5 horis, in pressura est imperium inter 0.40.8MPA;
Quod 4 gradum, neutralization: addere metered glacial acetic acidum in antecipitiis in praecipitationis, torcular in Aether materiam pro neutralization, calor sursum LXXV ~ ℃ est, et PH PH valorem LXVIII Cum autem praecipitatio perficitur, ad praecipitatio tristique est repleti ICTUS aqua tractata per e converso Osmosis fabrica ad XC ℃ ℃ C ℃;
Quintus gradus, centrifuga baptismata, in materia in quarta gradus est centrifuga per horizontalem Centrifuge, et separata materia transfertur ad lavacrum ollestis repleti calida aquae in antecessum, et lotus aqua;
Sextus gradus, centrifuga siccatio: lotis materia est in dryer per horizontalem stupra Centrifuge, quod materia est exaruit 150-170 ° C, et siccasque materia est pulverem et packaged.
Comparari existentiumCellulose aetherproduction technology, the present invention adopts ethylene oxide as the etherifying agent to prepare hydroxyethyl methyl cellulose, and has good anti-mildew ability because it contains hydroxyethyl group, Good viscosity stability and mildew resistance during long-term storage. Potest esse pro aliis Cellulose aether.
Post tempus: Apr-25-2024