Granulate or powder for producing coating or binding agents for medicaments
View Patent ↗The invention relates to a process for the production of granules or powders, suitable as coating agents and binders for oral or dermal pharmaceutical forms, for cosmetics or food supplements, consisting essentially of (a) a copolymer, consisting of free radical-polymerized C1- to C4-esters of acrylic or methacrylic acid and further (meth)acrylate monomers which contain functional tertiary amino groups, (b) 3 to 25% by weight, based on (a), of an emulsifier having an HLB of at least 14, (c) 5 to 50% by weight, based on (a), of a C 12 - to C 18 -monocarboxylic acid or of a C 12 - to C 18 -hydroxyl compound, where the components (a), (b) and (c) are simultaneously or successively blended or mixed with one another, optionally with addition of a pharmaceutical active compound and/or further customary additives, fused in a heatable mixer, mixed, the melt is cooled and comminuted to give granules or powders.
1. A process for the production of granules or powders, suitable as coating agents and binders for oral or dermal pharmaceutical forms, for cosmetics or food supplements, consisting essentially of
(a) 50 to 90 by weight, of a copolymer, consisting of free radical-polymerized C1- to C4-esters of acrylic or methacrylic acid and further (meth)acrylate monomers which contain functional tertiary amino groups, wherein the copolymer is present in granule or powder form,
(b) 3 to 25% by weight, based on (a), of an emulsifier having an HLB of at least 14, and
(c) 5 to 50% by weight, based on (a), of a C 12 - to C 18 -monocarboxylic acid or of a C 12 - to C 18 -hydroxyl compound,
where the components (a), (b) and (c) are simultaneously or successively blended or mixed with one another, optionally with addition of a pharmaceutical active compound and/or further customary additives, fused in a heatable mixer, mixed, the melt is cooled and comminuted to give granules or powders wherein the coating and binding agents have a water vapor permeability of at most 300 (g/m 2 /d) as measured according to DIN 53 122.
2. The process as claimed in claim 1 , wherein characterized in that the heatable mixer employed is an extruder.
3. The process as claimed in claim 2 , characterized in that a double screw extruder is employed.
4. The process as claimed in one or more of claim 2 to 3 , characterized in that extrusion is carried out at temperatures in the range from 80 to 160° C.
5. Granules or powder, suitable as a readily water-dispersible or fusible precursor for a coating agent and binder for oral or dermal pharmaceutical forms, for cosmetics or food supplements, characterized in that it can be produced as claimed in one or more of claims 1 to 4 .
6. The use of granules or powders as claimed in claim 5 for the production of a pharmaceutical form which is contained a moisture-sensitive pharmaceutical active compound from the active compound classes of the analgesics, antirheumatics, active compounds for the treatment of gastric ulcers, antibiotics, antihypotensives, antidepressants, thyroid therapeutics, anti Parkinson active compounds, anxiolytics, peptides, phospohordiesterase inhibitors, proteins, cardiovascular agents or neuroleptics or their salts.
7. The use as claimed in claim in claim 6 , characterized in that the moisture-sensitive pharmaceutical active compound present is acetylsalicylic acid, carbenoxolone, cefatotin, epinefrine, imipramine, potassium iodide, ketoprofen, levodopa, nitrazepam, nitroprusside, oxitetracycline HCl, promethazine, omeprazole or other benzimidazole derivatives, ranitidine or streptomycin or their salts.
8. The use of the powder or granules as claimed in claim 5 as a moisture-isolating coating.
9. The use of the powder or granules as claimed in claim 5 as a taste-isolating coating for active compound-containing pharmaceutical compositions.
10. The use of the powder or granules as claimed in claim 5 as a binder by processing by means of wet or melt granulation.
11. The use of two or more types of granules or powders as claimed in claim 5 , the granules or powders in each case containing a different color pigment and being processed by mixing to give a coating agent and binder.