Preparation of crosslinked cyclodextrin resins with enhanced porosity
US4958015A · kind A · utility
10Cited by
2References
25Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 30, 1988 |
| Grant date | Sep 18, 1990 |
| Priority date | — |
| Expiry date | Sep 30, 2008 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08J2305/00
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
Resins resulting from the crosslinking of cyclodextrin with dicarboxylic acid dihalides often show marginal binding capacity for guest molecules and poor kinetics of guest molecule removal because of the limited porosity of the resins. Resins whose apparent bulk density has been reduced by at least 20% show an enhancement in both of the aforementioned properties resulting from an increase in porosity of the resins. Such resins in general can be formed by conducting the crosslinking reaction in the presence of a blowing agent. The resulting materials retained their desirable physical properties for use in a fixed or packed bed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.