Acrylic enteric coating compositions

US6420473B1 · kind B1 · utility

Assignee

• BPSI HOLDINGS LLC · US

Inventors

• Ramireddy Chittamuru · Lansdale, US
• George Reyes · Perkiomenville, US
• Thomas Farrell · Marlborough, US
• Charles F. Vesey · Hatfield, US
• Dev K. Mehra · Furlong, US
• Hans-Ulrich Petereit · Darmstadt, DE
• Klaus Lehmann · Roßdorf, DE

Key dates

• Filing date: Feb 10, 2000
• Grant date: Jul 16, 2002
• Expiry date: Feb 10, 2020

Classification

• Technology area (CPC A): Human Necessities
• CPC primary: A61K47/02
• WIPO field: Pharmaceuticals
• WIPO sector: Chemistry

Abstract

A non-toxic, edible, enteric film coating, dry powder composition for use in making an aqueous enteric suspension which may be used in coating pharmaceutical tablets comprises a) an acrylic resin, said resin comprising i) from 20 to 85 percent by weight of at least one alkyl acrylate or alkyl methacrylate moiety, ii) from 80 to 15 percent by weight of at least one vinyl or vinylidene moiety having a carboxylic acid group capable of salt formation, and iii) from 0 to 30 percent by weight of at least one other vinyl or vinylidene moiety copolymerizable with i) and ii), b) an alkalizing agent capable of reacting with the acrylic resin such that, after reaction, 0.1 to 10 mole percent of the acidic groups in 1a-ii) are present in the salt form, and c) a detackifier.