Patent ID: 7498044

Claim:
A process for producing a coated drug form or a drug form in the form of an active ingredient matrix, by processing a copolymer, an active pharmaceutical ingredient, a core if present and/or pharmaceutically customary excipients in a conventional manner by melting, injection molding, extrusion, wet granulation, casting, dipping, spreading, spraying or compression to form a coated drug form and/or to form an active ingredient matrix, wherein said copolymer comprises 20 to 33% by weight of methacrylic acid and/or acrylic acid, 5 to 30% by weight of methyl acrylate and 20 to 40% by weight of ethyl acrylate and more than 10 to 30% by weight of butyl methacrylate and, 0 to 10% by weight of vinylically copolymerizable monomers, the proportions of the monomers adding up to 100% by weight, and the glass transition temperature of the copolymer is 55 to 70° C.