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Hydroxyethyl methylcellulose

Cellulose acetate Cellulose acetate butyrate Cellulose acetate phthalate Cellulose acetate propionate Ethyl cellulose Hydroxyethylcellulose Hydroxyethyl methylcellulose Hydroxypropyl cellulose... [Pg.491]

Cellulose, 2-hydroxyethyl methyl ester Culminal MHEC HEMC hydroxyethyl methylcellulose hymetellose MHEC methylhydroxyethylcellulose Tylopur MH-, Tylopur MHB Tylose MB Tylose MH Tylose MHB. [Pg.334]

Fluidized aqueous suspensions of 15% by weight or more of hydroxyethyl-cellulose, hydrophobically modified cellulose ether, hydrophobically modified hydroxyethylcellulose, methylcellulose, hydroxypropylmethylcellulose, and polyethylene oxide are prepared by adding the polymer to a concentrated sodium formate solution containing xanthan gum as a stabilizer [278]. The xanthan gum is dissolved in water before sodium formate is added. Then the polymer is added to the solution to form a fluid suspension of the polymers. The polymer suspension can serve as an aqueous concentrate for further use. [Pg.246]

Early soil-release agents, applied particularly to resin-finished cellulosic goods, were water-soluble polymers, many being related to thickeners (section 10.8) such as starch, hydroxypropyl starch, sodium carboxymethylcellulose, methylcellulose, hydroxyethyl-cellulose, alginates, poly(vinyl alcohol) and poly(vinylpyrrolidone). These functioned essentially as temporary barriers and preferential reservoirs for soil, which was thus easily removed along with the finish in subsequent washing, when they then helped to minimise... [Pg.266]

The mechanism of separation with linear polymers is as follows. At a certain polymer concentration known as the entanglement threshold, the individual polymer strands begin to interact with each other, leading to a meshlike structure within the capillary. This allows DNA separation to take place. Many of the common polymers are cellulose derivatives, such as hydroxyethyl cellulose, hydroxypropyl cellulose, hydroxypropylmethyl cellulose, and methylcellulose. Other applicable polymers include linear polyacrylamide, polyethylene oxide, agarose, polyvinyl pyrrolidone, and poly-N. Ar-dimethylacrylamide. High-resolution separation up to 12,000 bp has been reported using entangled polymer solutions. [Pg.366]

Figure 1. ESR spectra of cellulose and cellulose derivatives irradiated with UV light of A > 280 nm for 60 min at 77 K. Spectra were recorded at 77 K. Key a, cellulose b, methylcellulose c, ethylcellulose d, acetylcellulose e, hydroxyethyl-cellulose f, carboxymethylcellulose. Figure 1. ESR spectra of cellulose and cellulose derivatives irradiated with UV light of A > 280 nm for 60 min at 77 K. Spectra were recorded at 77 K. Key a, cellulose b, methylcellulose c, ethylcellulose d, acetylcellulose e, hydroxyethyl-cellulose f, carboxymethylcellulose.
Figure 9. Grafting efficiency for cellulose and cellulose derivatives initiated by UV light of A > 280 nm. Key a, fibrous carboxymethylcellulose b, hydroxyethyl-cellulose c, methylcellulose d, powdered carboxymethylcellulose e, ethylcellulose f, cellulose g, acetylcellulose. Figure 9. Grafting efficiency for cellulose and cellulose derivatives initiated by UV light of A > 280 nm. Key a, fibrous carboxymethylcellulose b, hydroxyethyl-cellulose c, methylcellulose d, powdered carboxymethylcellulose e, ethylcellulose f, cellulose g, acetylcellulose.
Methylcellulose solutions generally form gels at higher temperatures. The gelation temperature is increased when hydroxyethyl or hydroxypropyl groups are introduced into the methylcellulose (cf. Section 9.6.2). Hy-droxyethylmethylcellulose and hydroxypropylmethylcellulose are prepared industrially by the reaction of alkali cellulose first with ethylene oxide or propylene oxide and then with methyl chloride. Similarly, hydroxyethyl-ethylcellulose is prepared by consecutive ethylene oxide and ethyl chloride treatments. Cellulose ethers with both methyl and ethyl groups have also been manufactured. [Pg.179]

Cellulose derivatives Chitosans Gelatin Sodium carboxymethylcellulose (NaCMC) Methylcellulose (MC) Hydroxypropyl methylcellulose (HPMC) Hydroxypropyl cellulose (HPC) Hydroxyethyl cellulose (HEC)... [Pg.833]

Among the polymers used in lens comfort solutions are polyvinyl alcohol, polyvinylpyrrolidone, dextran, and various cellulose derivatives such as hydroxyethyl cellulose, hydroxypropyl cellulose, and hydroxypropyl methylcellulose. Surfactants include certain poloxamer and poloxamine compounds. Other normal components comprise appropriate preservative(s) as well as buffering and tonicity-adjusting agents. [Pg.2209]

Hydroxyethylmethyl cellulose is used as an excipient in a wide range of pharmaceutical products, including oral tablets and suspensions and topical gel preparations. It has similar properties to methylcellulose, but the hydroxyethyl groups make it more readily soluble in water and solutions are more tolerant of salts and have a higher coagulation temperature. [Pg.334]

Hydroxyethyl cellulose hydroxyethylmethyl cellulose hydroxypropyl cellulose hypromellose phthalate methylcellulose. [Pg.348]

Carboxymethyl cellulose cellulose acetate cellulose acetate phthalate cellulose, microcrystalline ethylcellulose hypromellose hypromellose phthalate hydroxyethyl cellulose hydroxy-propyl cellulose methylcellulose. [Pg.352]

Methods of Preparation of Hydrophobically Modified WSPs (HMWSPs). Incorporation of Hydrophobes into WSPs. Water-soluble cellulose derivatives ((hydroxyethyl)cellulose, (hydroxypropyl)cellulose, methylcellulose, etc.) or synthetic polymers containing hydroxyl groups (e.g., poly(vinyl alcohol)) can be reacted with a long-chain alkyl halide (2), acyl halide (2), acid anhydride (6), isocyanate (2), or epoxide (2, 3) under appropriate conditions to form an HMWSP. These reactions are shown in Scheme I. These postmodifications can be done in solution or in hetero-... [Pg.344]

As with the alkylated polysaccharides, the physicochemical properties of hydroxyalkylated polysaccharides have continued to be investigated, particularly those of commercial value. The general characteristics of 0-(2-hydroxyethyl)cellulose have been described, together with pro-cedmes for the viscosimetric measurement of solutions of the polymer, and the macromolecular properties of the polymer in solution, described earlier, have been reviewed. The effect of increasing the substitution of both water-soluble 0-(2-hydroxyethyl)- and 0-(2-hydroxypropyl)-cellulose is to decrease their afiBnities for water. Water-soluble 0-(2-hy-droxypropyl) cellulose can be fractionated in a way analogous to that for O-methylcellulose by utilizing solvent—nonsolvent mixtures. For polysac-... [Pg.317]

Hydroxyethyl cellulose methyl cellulose hydroxypropyl methylcellulose... [Pg.30]

Cellulose esters or ethers such as methylcellulose (MC), ethylcellulose (EC), hydroxyethyl cellulose (HEC), hydroxypropyl cellulose (HPC), hydroxypropyl methylcellulose/hypromellose (HPMC), hypromeUose phthalate (HPMCP), hypromellose acetate phthalate (HPMCAP), hypromellose acetate succinate (HPMCAS), cellulose acetate (CA) and derivates Poly (methyl) methacrylates (Eudragit L, S, E, RS/ RL)... [Pg.1139]

Cellulose, hydrogen sulfate, sodium salt. See Sodium cellulose sulfate Cellulose, hydroxybutyl methyl ether. See Hydroxybutyl methylcellulose Cellulose hydroxyethylate Cellulose hydroxyethyl ether Cellulose, 2-hydroxyethyl ether. See Hydroxyethylcellulose Cellulose, 2-hydroxyethyl 2-hydroxy-3-(trimethylammonio) propyl ether, chloride. See Polyquatemium-10... [Pg.814]

Hydrogen peroxide Hydroquinone Hydroquinone ethyl ether 7-Hydroxycoumarin 2-(2 -Hydroxy-3,5 -di-t-amylphenyl) benzotriazole Hydroxyethylcellulose , 2-Hydroxyethyl methacrylate Hydroxylamine sulfate Hydroxypropyl methylcellulose 2-Imidazolidinone... [Pg.4797]

Hydrolyzed sweet almond protein Hydrolyzed vegetable protein Hydroxybutyl methylcellulose Hydroxyethyl cetyidimonium phosphate Hydroxypropylcellulose Hydroxypropyl chitosan Hydroxypropyl guar Hydroxypropyl methylcellulose Hydroxypropyltrimonium hydrolyzed collagen Hydroxypropyltrimonium hydrolyzed silk... [Pg.5249]

Acrylamido-2-methylpropanesulfonic acid protective colloid, acrylic/vinyl latex Ethyl hydroxyethyl cellulose protective colloid, adhesives Hydroxypropylcellulose Sodium polyacrylate protective colloid, aq. paints Methylcellulose protective colloid, baking Albumen... [Pg.5582]

Hydroxybutyl methylcellulose Hydroxyethyl stearamide-MIPA Hydroxypropylcellulose Hydroxypropyl com starch Hydroxypropyl guar... [Pg.5848]

Methods for the SEC analysis of ethyl cellulose (21,57) hydroxyethyl cellulose (57,79) cellulose acetate butyrates (80) allylated methylcellulose, triallyl cellulose, and glycidyl cellulose (48) tetrahydropyranyl cellulose, tetrahydropyranyl hydroxyethyl cellulose, and tetrahydropyranyl methylcellulose (14) carboxymethylcellulose (11,91) and cellulose ethers (97) have been described in... [Pg.342]

See other pages where Hydroxyethyl methylcellulose is mentioned: [Pg.190]    [Pg.190]    [Pg.117]    [Pg.239]    [Pg.47]    [Pg.48]    [Pg.385]    [Pg.277]    [Pg.371]    [Pg.1085]    [Pg.1087]    [Pg.1087]    [Pg.308]    [Pg.8]    [Pg.315]    [Pg.93]    [Pg.534]    [Pg.1501]    [Pg.5583]    [Pg.5728]    [Pg.5729]    [Pg.403]   
See also in sourсe #XX -- [ Pg.334 ]



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Hydroxyethylation

Methylcelluloses

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