Column packing material with both hydrophobic and hydrophilic groups and process for production thereof
US5135649A · kind A · utility
18Cited by
8References
9Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 25, 1990 |
| Grant date | Aug 4, 1992 |
| Priority date | — |
| Expiry date | Sep 25, 2010 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01J2220/58
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A column packing material comprising a porous support coated with a silicone polymer having an Si--R bond, wherein R is a hydrocarbon group having 1 to 18 carbon atoms, and an Si--R' bond, wherein R' is a hydrophilic group having one or more of polyoxyalkylene group or hydroxyl group at the terminal end, of which column packing material is produced by: PA1 modifying a porous support by bonding hydrocarbon groups to the porous support; PA1 eliminating a part of the hydrocarbon groups from the modified porous support; and PA1 modifying the porous support by bonding hydrophilic groups thereto.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.