Stabilized pulverulent active agents, compositions containing them, process for obtaining them and their applications
US5595762A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 30, 1993 |
| Grant date | Jan 21, 1997 |
| Priority date | — |
| Expiry date | Nov 30, 2013 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61K2800/624
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
Stabilized pulverulent active agents, compositions containing them and also process for obtaining them; such stabilized active agents enable dry and stable pharmaceutical, dietary, nutritional or cosmetic compositions to be obtained, in which the properties of the said active agents are neither modified nor impaired. Such stabilized active agents are stabilized by coating with a coating composition comprising: PA1 -- at least one film-forming agent, in proportions of between 2 and 25% by weight of the final mass, selected from polyvinylpyrrolidones (povidone), polyvinyl alcohols, vinylpyrrolidone/vinyl acetate copolymer, vinylpyrrolidone/polyvinyl alcohol copolymer, cellulose derivatives such as cellulose acetate, cellulose acetate phthalate, cellulose butyrate, ethylcellulose and methylcellulose, acrylic and methacrylic polymers and copolymers and vegetable, animal or synthetic waxes, and PA1 -- at least one pore-forming agent, in proportions of between 0 and 5%, by weight preferably of between 0.5 and 5%, of the final mass, selected from microcrystalline lactose, low molecular weight polyethylene glycols, calcium carbonate, calcium phosphate, sucrose, sodium chloride and potassiu…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.