Tablets coated with aqueous resin dispersions
US4060598A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 28, 1975 |
| Grant date | Nov 29, 1977 |
| Priority date | — |
| Expiry date | Oct 28, 1995 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61K9/2893
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
Coated tablets are prepared by applying to a core of active material, at least one layer of a coating composition made up of a film forming aqueous synthetic resin dispersion and from 2-50% by weight of a water or alkaline soluble material and thereafter permitting the coating composition layer to dry. The resulting coated tablet has a core surrounded by a continuous porous matrix of synthetic resin formed from the aqueous dispersion which is insoluble in water and insoluble in the gastrointestinal tract. The pores of the continuous resin matrix are filled with a discontinuous particulate material which is water or alkaline soluble. The coated tablet initially is air and moisture tight.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.