Patent ID: 9237760
Filing Date: 2016-01-19
CPC Classification: A23L,A23P,A61K

Claim Text:
1. A pharmaceutical or nutraceutical preparation comprising a) a core comprising a pharmaceutically or nutraceutically active substance; and b) an inner controlling layer surrounding the core comprising c) an outer controlling layer consisting essentially of at least one polymer or copolymer bearing anionic groups or anionic groups being partially or fully neutralized by base, wherein the at least one copolymer of component ii) in the inner controlling layer comprises: 41 to 60% by weight, based on the weight of the copolymer, of at least one structural unit derived from methyl methacrylate or ethyl acrylate; and 40 to 59% by weight, based on the weight of the copolymer, of at least one structural unit derived from acrylic or methacrylic acid, and at least one product of at least partial neutralization thereof, wherein the pharmaceutically or nutraceutically active substance is released from the pharmaceutical or nutraceutical preparation in an amount of more than 90% after a first exposure to acidic conditions for 2 hours and then a subsequent exposure to neutral or alkaline conditions for 6 hours.