Inert cross-linked copolymer support, its preparation process and its use for producing delayed action medicaments
US4729904A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 7, 1985 |
| Grant date | Mar 8, 1988 |
| Priority date | — |
| Expiry date | Aug 7, 2005 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/2982
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
Inert cross-linked copolymer able to absorb and then progressively release a pharmaceutically active substance, wherein it is constituted by a powder of a cross-linked copolymer comprising PA0 30 to 80% by weight of monounsaturated alkyl acrylate and/or methacrylate; PA0 5 to 68% by weight of acrylic and/or methacrylic acid; and PA0 2 to 15% by weight of bifunctional or trifunctional acrylate and/or methacrylate. A mixture of monounsaturated alkyl acrylate and/or methacrylate, acrylic and/or methacrylic acid, and bifunctional or trifunctional acrylate and/or methacrylate monomers is polymerized in accordance with a free radical polymerization mechanism. The support is used for the preparation of a delayed action or release medicament.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.