Pharmaceutical Polymers used for Tablet coating

Polymer

A polymer is a large molecule, or macromolecule, composed of many related subunits, known as monomers. Polymers range fromvfamiliar synthetic plastics such as polystyrene to natural biopolymers such as DNA and propiens that are fundamental to biological structure and function. In the majority of film-coating formulations, the polymer is the major ingredient.

Polymers used in Conventional/Immediate release film-coating formulations:

SI. No.	Class	Examples
1.	Cellulosics	⇨ Hydroxypropyl methylcellulose (HPMC) ⇨ Hydroxypropyl cellulose (HPC) ⇨ Methyl hydroxy-ethyl-cellulose (MHEC) ⇨ Methyl-cellulose (MC) ⇨ Ethyl-cellulose (EC) ⇨ Sodium carboxy-methylgcellulose (SCMC)
2.	Vinyl	⇨ Polyvinyl Pyrolidone (PVP) ⇨ Polyvinyl Alcohol (PVA) ⇨ Polyvinyl pyroludone—polyvinyl acetate copolymers ⇨ Polyvinyl alcohol—polyethylene glycol copolymers
3.	Glycols	⇨ Polyethylene glycols
4.	Acrylics	⇨ Methacrylate Aminoester coploymer ⇨ Ethylacrylate —methylmethacrylate coplymer
5.	Other Carbohydrate	⇨ Maltodextrin ⇨ Polydextrose

Polymers used for Enteric film coating formulations:

⇨ Cellulose Acetate Phthalate (CAP)

⇨ Cellulose Acetate Trimelliate (CAT)

⇨ Hydroxypropyl Methylcellulose Phthalate (HPMCP)

⇨ Polyvinyl Acetate Phthalate (PVAP)

⇨ Hydroxypropyl methylcellulose Acetate Succinate (HPMCAS)