Patent ID: 8962064
Filing Date: 2015-02-24
Classification: A61K,C08L,C09D,Y10T

Abstract:
1. A process for producing pulverulent, antioxidant-comprising pharmaceutical coating compositions, the process comprising: providing an aqueous polymer dispersion comprising one or more antioxidants and, as component A, a polymer obtained by radical polymerization of a) N,N-diethylaminoethyl methacrylate, and b) at least one radically polymerizable compound selected from esters of α,β-ethylenically unsaturated mono- and dicarboxylic acids with C wherein the antioxidants are incorporated into the aqueous polymer dispersion in the form of a solid solution of the antioxidants in surfactants or polymers or of a dispersion comprising emulsifiers with a hydrophilic-lipophilic balance value greater than 10; and spray processing the aqueous polymer dispersion to provide a pharmaceutical powder form.