Hydroxypropyl methylcellosus est quaedam non-ionic cellulosa mixto aether. Dissimilis Ionic Methyl carboxymethyl cellulosis mixto aether, non agere cum gravibus metalla. Ob diversas rationes de metticum contentus et hydroxypropyl contentus in hydroxypropyl methylcellosa et viscosities plures varietates diversis proprietatibus, exempli gratia altum methxyl et HydroxyPropyl, cum exhibere propius et Hydroxypropyl hydroxypropyl methyl cellulosose. Tamen, in singulis varietate, quamquam tantum parva moles hydroxypropyl coetus vel parva moles METHoxyl coetus est continetur, sunt magna differentias in solubility in organicis solvents vel Floroculation temperatus in aqueous solvents vel Flocculation in Aqueum solvents vel Floroculation in Aqueous solvents vel caliditas in solvents vel caliditas in aqueous solvents vel Floroculation in Aqueous solvents vel caliditas in solvents et temperatus in aqueous solvents vel caliditas in solvents vel caliditas in aqueous solvents vel Floroculation in Aqueum solvents vel caliditas in solvents vel caliditas in solutionum.
(I) solubility proprietatibus hydroxypropyl methylcellosus
①solubility hydroxypropyl Methylcellulose in aqua hydroxypropyl Methylcellulose est actu quaedam methylcellosus mutatio per propylene cadmiae (methoxypropylene), ita etiam habet similia in aquas frigidam solubility et calida aqua insolubilitas. Tamen, debitum ad mutatio hydroxypropyl coetus, eius gelatio temperatus in calida aqua multo altior quam de methyl Cellulose. Exempli gratia, in Viscositas hydroxypropyl Methylcellulose aqueum solutio cum II% Mthxy content substitutione gradum = 0.73 et hydroxypropyl contentus MS = 0.73 et Hydroxypropyl II ° C ° C ° C ° F. STEMULUS CELLOS ad idem ad C ° C ° C, cum C. Sicut in solubility in aquam, quod etiam valde amplio. Exempli gratia, et pulverem hydroxypropyl methylcellosus (0.2 0.5mm ad XX ° C ° C et Aqueum solutio viscositas 2PA • S potest emi in locus temperatus, facile solutum in aquam frigefaci.
②solubility of hydroxypropyl Methylcellulose in organicum solvents solubility of hydroxypropylt Methylcellulose in organicis solvents est etiam melius quam quod de methylcellosus. For products above 2.1, high-viscosity hydroxypropyl methylcellulose containing hydroxypropyl MS=1.5~1.8 and methoxy DS=0.2~1.0, with a total degree of substitution above 1.8, is soluble in anhydrous methanol and ethanol solutions Medium, and thermoplastic and water-soluble. Est etiam solutum in chlorinated hydrocarbonum ut methylene chloride et chloroform, et organicum solvents ut acetone, isopropanol et diacetone alcohol. Solubilitatem in organicum solvents melius quam aqua solubility.
(II) factores afficiens ad viscositas hydroxypropylque Methylcellosa vexillum Viscositas determinatio hydroxypropyl Methylcellose est idem quod aliis Cellulose aquehos et mensuram ad XX ° C et II% aqueum solution ut vexillum. Viscositas eiusdem productum auget augmentum concentration. Nam products cum diversis mocecular weights ad idem concentration, quod productum cum maior molecular pondus habet superiorem viscositas. Et necessitudinem cum temperatus est similis, quod de Methyl Cellulose. Cum temperatus resurget, in Viscositas incipit diminuere, sed cum ad quandam temperatus, viscositas repente resurget et gelaing occurrit. Gel temperatus humilis-viscosity products est altior. Est princeps. Point eius Gel est non solum ad viscositatem aether, sed etiam ad compositionem ratio METHoxyl coetus et hydroxypropyl coetus in aether et magnitudinem totius substitutionis gradum. Notandum est quod hydroxypropyl Methylcellosa est etiam Pseudoplastic et solution est stabilis locus temperatus sine ulla degradation in viscosity nisi ad facultatem enzymatic degradation.
(III) De sal tolerantia hydroxypropyl methylcellulosis cum hydroxypropyl Methylcellulose est a non-Ionic Aether, quod non ionize in aqua media, dissimilis alias cellulosa reags in gravibus metallum et praecipua celluloso reags cum gravibus metalla et praecipuas in solut. Generalis sales ut chloride, bromide, phosphate, nitrate, etc. non praecipitant, cum addidit ad aqueum solution. Tamen, quod praeter ex sale habet aliquam influentiam in Floroculation temperatus ad aqueum solution. Cum sale concentratio crescit gel temperatus decrescit. Cum sal concentratio est infra Floroculation Point, in viscositas solutionis tendit ad augendam. Ideo quaedam moles salis additur. In application, quod potest consequi irrepat magis oeconomice. Ideo in aliqua applications, est melius ut mixtisque cellulosa aether et sal, quam altiorem concentration aether solutio ad consequi irradatus effectus.
(IV) hydroxypropyl methylcellose acid et alkali resistentia hydroxypropyl methylcellosus est plerumque firmum ad acidis et alkalis, et non affectus in range de pH II ~ XII. Potest sustinere quaedam moles lux acida, ut formicos acidum, acetic acidum, citric acidum, succinic acidum, phosphoric acidum, boric acidum, etc. Alkalis ut caustic nitri, caustic potash et calce aquam non effectum in ea, sed non potest leviter augendam viscosity solutionum, et tunc tardius decrescit.
(V) Compatibility hydroxypropyl hydroxypropyl methylcellosus hydroxypropyl solutio potest esse mixta cum aqua-solutum polymer componit formare uniformis et transparent solutio superioris viscositas. Haec polyethylene glycol polymer componit, polyvinyl acetate, polyilicone, polymethylvinylsiloxane, hydroxyethyl Cellulose et Methyl Cellulose. Naturalis High Momocular componit ut Gum Arabica, lucust faba gummi, Karaya gum, etc. et bona compatibility cum suo solutione. Hydroxypropyl methylcellosa potest etiam mixta cum Mannitol Ester aut sorbitol Ester Palestrica acid aut palmitic acidum, et potest etiam misceri cum glycerin, Samenol et mannitol et haec componit potest esse ut hydroxypropyl methylscellosus Plastolulyer.
(VI) insolubilis aqua-solutum cellulosose aether hydroxypropyl methylcellosa potest portare de superficiem crucem-vinculum cum aldehydes, ut haec aqua-solutum aethere praecipitari in solutione et facti insolubilis in aquam. Et aldehydes, quae faciunt hydroxypropyl methylcellose insoluble includit formaldehyde, glyoxal, succinic aldehyde, adipaldehyde, etc. cum usura formaldehyde, specialem attention ut solucit ad crosslinking agens in industriae productio. Et moles huius generis crucis-vinculum agente in solutione est 0.2% ~ X% of Missam de Aether, potissimum VII% ~ X%, exempli, 3.3% ~ VI% of Gloxal est maxime idoneam. Generaliter, ad curatio temperatus est 0 ~ XXX ℃ et tempus est I ~ 120min. Cross-vinculum reactionem indiget ferri sub acidic conditionibus. Generally, the solution is first added with inorganic strong acid or organic carboxylic acid to adjust the pH of the solution to about 2~6, preferably between 4~6, and then add aldehydes to carry out the cross-linking reaction . The used acid has hydrochloric acid, sulfuric acid, phosphoric acid, formic acid, acetic acid, hydroxyacetic acid, succinic acid or citric acid etc., wherein with formic acid or acetic acid is advisable, and formic acid is optimal. Acidum et aldehyde potest etiam adiungere eodem tempore ad patitur solutionem subire crucem-vinculum reactionem intra desideravit Phant. Hoc reactionem est saepe usus est in ultima curatio processus in praeparatione processus of Cellulose aether. Post cellulosa aether est insolubilis, id est convenient ut
XX ~ XXV ℃ aqua ad lavandum et purificationem. Cum productum est in usu, alkaline substantiae potest addidit ad solutionem productum ad adjust in PH de solutione esse alkaline, et uber et dissolvere in solut. Hoc modum est etiam applicabilis ad curatio de film post cellulosa aether solution factum est in film ad eam insolubilis amet.
(VII) Enzyme resistentia hydroxypropyl methylcellosa in doctrina, cellulosa derivationes, ut firmiter bonded substituent coetus in se anhydroglucosa coetus, non susceptibilis ad microbial exesa, quod est quod etiam in cellulosis in cellulis Nondum torquem non uniformis sufficit et microorganisms potest ERODE in unsubstituted Anhydroglucosa Group. Sugars sunt formatae et absorbuit ut nutrimentum in microorganisms. Igitur si gradus inherendum substitutionis cellulis augetur, resistentia ad enzymaticum exesa cellulosa aethere et auget. Secundum refert, sub moderari conditionibus, in hydrolysis eventus enzymes, in RELICTUTIA hydroxypropyl Methylcellosus (DS = 1.9) is 13.2%, Methylcellosus (DS = (1.66% est, et hydroxyethyl) is 3.8%. Potest videri, quod hydroxypropyl Methylcellulose habet fortis anti-enzyme facultatem. Ideo optimum enzyme resistentia hydroxypropyl methylcellosa, cum suis bonis dispertibility, crasso et film, formatam proprietatibus, adhibetur in aqua-emulsion coatings, et cetera, et plerumque non opus est addere conservativa. Tamen, pro diu-term repono de solutione vel fieri potest contaminationem ab extra, conservativa potest addidit ut cautela, et arbitrium potest determinari secundum ultima requisita solution. Phenylmercuric acetate et manganese fluorosilicare sunt efficaciora conservativa, sed omnes habent toxicity, operam oportet esse solvit ad operationem. Generaliter, I ~ 5mg de phenylmercury acetate potest addidit ad solutionem per sextarius dosis.
(VIII) perficientur hydroxypropyl Methylcellulose amet Hydroxypropyl Methylcellulose habet optimum film-formatam proprietatibus. Et aqueum solution seu organicum solvendo solutionis est iactaret in speculo laminam et fit liber post siccatio. Color, diaphanum et lenta film. Hoc est bonum humorem resistentia et manet solidum ad altum temperaturis. Si hygroscopic plasticizer additur, eius elongatio et flexibilitate potest esse auctus. In verbis meliorem flexibilitatem, plasticizers ut glycerin et sorbitol sunt aptissima. Plerumque solutio concentration est II% ~ III%, et moles plasticizer est X% ~ XX% of Cellulose aether. Si contentus de plasticizer est alta, colloidal siccitatibus DECREMENTUM erit in altum humiditas. Tenensium vires in amet cum plasticizer addidit multo maior quam sine plasticizer et auget augmentum additae quantum. Ut ad hygroscopicity de film, etiam crescit cum incremento moles plasticizer.
Post tempus: Dec-20-2022