Back to results
US 5,075,432 AGranted
Spherical cyclodextrin polymer beads
AssigneeEdward Vanzo
InventorEdward Vanzo
Life of this patent
Estimating the term…
Abstract
The process entails forming a droplet of water, cyclodextrin and base in a non-polar solvent such as methylisobutylketone using polyvinyl butyral as an emulsifier. A cross-linking agent such as epichlorohydrin is reacted with the cyclodextrin and emulsifying agent to form the spherical polymer bead.
Claims19
A process for making spherical cyclodextrin polymer beads comprising the steps of:
- (a) forming an emulsion of droplets of polar solvent and cyclodextrin surrounded at least in part by an emulsifying agent polyvinyl butyral in a non-polar solvent;
- (b) adding a cross-linking agent to said non-polar solvent and reacting said cross-linking agent with said cyclodextrin to form a spherical cyclodextrin polymer;
- and
- (c) recovering said spherical cyclodextrin polymer which is substantially free of said polyvinyl butyral.
1 more element
A spherical cyclodextrin polymer made by a process comprising the steps of:
- (a) forming an emulsion of droplets of polar solvent and cyclodextrin surrounded at least in part by an emulsifying agent polyvinyl butyral in a non-polar solvent;
- (b) adding a cross-linking agent to said non-polar solvent and reacting said cross-linking agent with said cyclodextrin to form a spherical cyclodextrin polymer;
- and
- (c) recovering said spherical cyclodextrin polymer which is substantially free of said polyvinyl butyral wherein said spherical cyclodextrin polymer is a cross-linked 3-dimensional matrix of cyclodextrin substantially free of emulsifying agent polyvinyl butyral.
1 more element
The spherical cyclodextrin polymer of cl aim 18 wherein the cyclodextrin is beta-cyclodextrin.
Dependencies are inferred from the claim text.