Ethylcellulose is used in pharmaceutical technology as a coating. Ethylcellulose is used in pharmaceutical technology as a coating agent. It contains suitable amounts of cetyl alcohol and sodium lauryl sulfate, which assist in the formation and stabilization of the dispersion. It is prepared by an emulsification solvent evaporation method, where the system is stabilized with sodium lauryl sulfate and cetyl alcohol 19. Change calculate the percentage of ethylcellulose in the portion of ethylcellulose dispersion type b taken. Drug release from beads coated with an aqueous colloidal. Physicomechanical analysis of free ethylcellulose films. Ethyl cellulose n ethyl cellulose dispersion type b. Ethyl cellulose or ethylcellulose is a derivative of cellulose in which some of the hydroxyl groups on the repeating glucose units are converted into ethyl ether. Ethylcellulose in organic solution or aqueous dispersion. Ethyl cellulose is similar in structure to cellulose and cellulose acetate but some of the hydroxyl oh functional groups are replaced on the cellulose by the ethoxy group och 2ch 3. Surelease is a complete, sustained release, aqueous coating system utilizing ethylcellulose as the rate controlling polymer for drug release.
Ethyl cellulose, viscosity 100 cp, 5 % in tolueneethanol 80. Aqueous ethyl cellulose dispersions containing plasticizers of different water solubility and hydroxypropyl methylcellulose as coating. An aqueous polymer dispersion or latex of ethylcellulose such as aquacoat ecd fmc biopolymer or surelease colorcon may also be used to produce. Also ethyl cellulose dispersion type b pure suppliers ethyl cellulose or ethylcellulose is a derivative of cellulose. The types of commercially available ethylcellulose polymers that may be. Ethyl cellulose has a cas number of 9004573 and its structure is shown in fig. Aqueous ethyl cellulose dispersions containing plasticizers of. A dispersed particles comprising one or more ethylcellulose polymers and b a.
To 1ml of dispersion in a 100ml graduated evenly, and place in a laboratory oven at about 60 mixing cylinder add 9ml of water followed by 25ml until dry. Surelease product information ethylcellulose dispersiontype b nf surelease 1 surelease ethylcellulose dispersion type b nf, is optimally plasticized for modified release and taste masking applications. An aqueous dispersion of ethyl cellulose offers various processing advantages over organic ethyl cellulose solution, including reduced coating processing time higher solid content and low viscosity, avoidance of potential toxicity due to residual solvent, and reduced environmental concerns, chokshi told pharmaceutical technology. Provided is an aqueous composition having ph of 8 or higher and comprising i a solid phase comprising dispersed particles that comprise ethylcellulose. Ethylcellulosea pharmaceutical excipient with multidirectional. The physical characteristic of ec types and their performance depends on the degree of. Surelease has a 25% solid content of ec, and it is plasticized with oleic acid, dibutyl sebacate, or fractionated coconut oil depending on type 20. Ethylcellulose aqueous dispersion is a colloidal dispersion of ethylcellulose in water. Surelease ethylcellulose dispersion type b nf colorcon. Ethylcellulose dispersion type b errata identifier.
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