Tablets coating agents for

The main use of ethylcellulose in oral formulations is as a hydrophobic coating agent for tablets and granules. Ethylcellulose coatings are used to modify the release of a drug, to mask an unpleasant taste, or to improve the stability of a formulation for example, where granules are coated with ethylcellulose to inhibit oxidation. Modified-release tablet formulations mav also be produced using ethylcellulose as a matrix former. " ... 

Hydroxyethyl cellulose is a nonionic, water-soluble polymer widely used in pharmaceutical formulations. It is primarily used as a thickening agent in ophthalmic and topical formulations, although it is also used as a binder and film-coating agent for tablets. It is present in lubricant preparations for dry eye, contact lens care, and dry mouth. ... 

It may not tolerate high concentrations of dissolved materials and tends to be salting out It is also incompatible with the substituted phenolic derivatives such as methyl and propyl parahydroxy benzoate Granulating and film coating agent for tablet Thickening agent, emulsion... 

Paraffin is mainly used in topical pharmaceutical formulations as a component of creams and ointments. In ointments, it may be used to increase the melting point of a formulation or to add stiffness. Paraffin is additionally used as a coating agent for capsules and tablets, and is used in some food applications. Paraffin coatings can also be used to affect the release of drug from ion-exchange resin beads. 

Uses Film-former, solubilizer, vise, modifier/stabilizer for cosmetics, pharmaceuticals, antiseptic/anesthetic spray bandages, antibiotic aerosol bandages, spray or rub-on gloves and protective masks hot melt adhesive for diaper wetness indicator system in repuipabie, pressure sensitive adhesives binder and coating agent for film coating of tablets... 

Cellulose (Figure 8.19) may be extracted from wood pulp, and is usually partially hydrolysed with acid to give microcrystalline cellulose. These materials are used as tablet diluents. Semi-synthetic derivatives of cellulose, e.g. methylcellulose, hydroxymethylcellulose, and carboxymethylcellulose, are used as emulsifying and suspending agents. Cellulose acetate phthalate is cellulose with about half the hydroxyl groups acetylated, and the remainder esterified with phthalic acid. It is used as an acid-resistant enteric coating for tablets and capsules. 

Base for medicated confectionery coating agent granulating agent sweetening agent tablet and capsule diluent. 

Pectin has been used in film-coating formulations containing chitosan and hydroxypropylmethyl cellulose in the investigation of the biphasic drug-release properties of film-coated paracetamol tablets, both in vitro and in vivo It has been shown that chitosan acts as a crosslinking agent for concentrated pectin solutions. 

In some oral formulations yellow wax is used as a polishing agent for sugar-coated tablets. It is also used in sustained-release formulations. Yellow wax coatings can be used to affect the release rate of drug from ion-exchange resin beads, and has also been used in multiparticulate controlled-release dosage forms of chlorphenamine maleate. ... 

Zein is used as a tablet binder in wet-granulation processes or as a tablet-coating agent mainly as a replacement for shellac. It is used primarily as an enteric-coating agent or in extended-release oral tablet formulations. Zein is also used in food applications as a coating agent. See Table I. 

Duratex. [Van Den Beigh Foods] Partially hydrogenated cottonseed oil lubricant for tablets, release agent, candy dusting and coating for hydroscopic materials. 

Plasdone . [ISP] PVP exc ient, tablet bindor, coating agent, solubilizer, stabilizer, protective colloid, vehicle for pharmaceuticals. 

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