Method of stably producing microporous membrane and use thereof in method of separating and purifying nucleic acid
US8511482B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 15, 2005 |
| Grant date | Aug 20, 2013 |
| Priority date | — |
| Expiry date | Sep 20, 2028 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01D2325/12
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A method of producing a porous membrane, the method comprising: casting a polymer solution, in which a polymer is dissolved in a mixture of a good solvent, a poor solvent and a non-solvent, over a support, so as to form a casted polymer solution; drying the casted polymer solution, so as to form a cast film; and subjecting the cast film to a phase separation, wherein the porous membrane is produced under a condition where a temperature of a casted surface is lower than a temperature of the polymer solution, and each of a temperature change of the polymer solution and a temperature change of the casted surface is kept within ±3.0° C.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.