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Tablet Coating
METHOCEL* Premium in Aqueous Systems for Tablet Coating (289 KB PDF)
Versatile METHOCEL Premium cellulose ethers produce tough, printable, economical, and highly consistent tablet coatings whether they are aqueous, hydro-alcoholic, or solvent-based. This 28-page technical brochure gives an overview of METHOCEL Premium products for tablet coating, a brief review of the coating process and solvent systems, and coating formulation guidelines. Numerous charts present data on properties of tablet coatings produced with METHOCEL Premium polymers.
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Ethylcellulose Coating: Effects of Viscosity Grade, Coating Weight and Accelerated Stability Conditions (114 KB PDF)
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The Utility of Hypromellose as a Porosity Modifier in an Ethylcellulose Compression Coating (223 KB PDF)
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Utility of Micronized Ethylcellulose in Compression Coatings (167 KB PDF)
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Ethylcellulose Coating: Effects of Viscosity Grade, Coating Weight and Accelerated Stability Conditions (114 KB PDF)
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The Utility of Hypromellose as a Porosity Modifier in an Ethylcellulose Compression Coating (223 KB PDF)
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Utility of Micronized Ethylcellulose in Compression Coatings (167 KB PDF)
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Thermal Gelation Properties of Methyl and Hypromellose (4 MB PDF)
Aqueous solutions of methylcellulose and hypromellose are known to form reversible gels upon heating. In pharmaceutical applications, gelation and gel strength of these products find use in tablet coating and in the manufacture of medicinal capsules. This 16-page article, which originally appeared in The Journal of Polymer Science, provides an in-depth review of the thermal gelation phenomenon and the factors that influence it, including polymer molecular weight, degree of substitution, and the effects of additives. (1979)
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Hansen Solubility Parameters for Selected Cellulose Ether Derivatives and Their Use in Pharmaceutical Industry (81 KB PDF)
This paper describes a laboratory method used for determining the partial solubility parameters of five METHOCEL* and six ETHOCEL* cellulose ether products. These laboratory derived values extend the data base of solubility parameters that have been used to understand phenomena like film coating adhesion, and cohesive and adhesive forces between substrates and polymeric binders in wet granulation processes. The paper characterizes the cellulose ethers in terms of non-polar, polar, and hydrogen bonding behavior. (1992)
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A Comparison Study of the Effect of Polymer Characteristics and Applied Coating Level on Controlled Release Matrix Systems (388 KB PDF)
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Ethylcellulose Controlled Release Coating: Effects of Plasticizers, Additives and Solvents (530 KB PDF)
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®™*Trademark of The Dow Chemical Company ("Dow") or an affiliated company of Dow.
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