Use of redispersible polymer powders or polymer granules as binders for producing solid pharmaceutical presentations

Claim 2

A solid, rapid release, pharmaceutically active composition, from which the active ingredients are released within a time of from 0.1 to 1 hour, as measured in simulated gastric acid, having a binder consisting essentially of a) 10-95% by weight of polyvinyl acetate, b) 5-90% by weight of an N-vinylpyrrolidone-containing polymer, c) 0-20% by weight of another water-soluble or water-swellable substance and d) 0-20% by weight of a water-insoluble dusting agent with or without e) ancillary ingredients, selected from the group consisting of bulking agents, flow regulators, disintegrants and lubricants, where binder content is from 0.5 to 20% of the total weight and wherein the polymers a) and b) have a K value of from 10 to 350.

Claim 3

The solid pharmaceutically active composition of claim 1 wherein component b) is selected from the group consisting of polyvinylpyrrolidone, vinyl acetate/vinylpyrrolidone copolymers and mixtures thereof.

Claim 4

The solid pharmaceutically active composition of claim 1 wherein the redispersible polymer powders or polymer granules are processed with the active ingredient by direct tableting, dry granulation or wet granulation.

Claim 5

The rapid release, pharmaceutically active composition of claim 1 in the form of redispersible powders or granules consisting essentially of pharmaceutically active ingredients and a binder consisting essentially of a) 80% by weight of polyvinyl acetate, b) 20% by weight of an N-vinylpyrrolidone-containing polymer, selected from the group consisting of polyvinylpyrrolidone, vinyl acetate/vinylpyrrolidone copolymers and mixtures thereof, c) 0-20% by weight of a water-soluble or water swellable substance selected from the group consisting of cellulose derivatives, acrylate/methacrylate copolymers and polyvinyl alcohols or mixtures thereof d) 0-20% by weight of a water-insoluble dusting agent selected from the group consisting of cellulose, disperse silica, talc, bentonite, magnesium stearate and calcium phosphate or mixtures thereof e) and auxiliary components selected from the group consisting of microcrystalline cellulose, lactose and/or corn starch, wherein the binder content in the said composition is from 0.5 to 20% by weight, resulting in tablets with a friability no greater than 0.35%.

Claim 6

The redispersible powders or granules as claimed in claim 4, wherein said binder consists essentially of 95% by weight of polyvinyl acetate/polyvinylpyrrolidone in the ratio 80:20 by weight and 5% by weight of polyvinyl alcohol.

Claim 7

The redispersible powders or granules according to claim 4, wherein said binder consists essentially of 95% by weight of polyvinyl acetate/vinylpyrrolidone-vinyl acetate copolymer (40:60) in the ratio 8:2 and 5% by weight of polyvinyl alcohol.