Superficially porous materials comprising a substantially nonporous hybrid core having narrow particle size distribution
AssigneeWaters Technologies Corporation
InventorsKevin D. Wyndham, Beatrice Muriithi
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Abstract
The present invention provides novel chromatographic materials, e.g., for chromatographic separations, processes for its preparation and separations devices containing the chromatographic material; separations devices, chromatographic columns and kits comprising the same; and methods for the preparation thereof. The chromatographic materials of the invention are chromatographic materials comprising having a narrow particle size distribution.
Claims20
A superficially porous material comprising superficially porous particles, wherein the superficially porous particles comprise an inorganic/organic hybrid core and one or more layers of a porous shell material surrounding the inorganic/organic hybrid core wherein the inorganic/organic hybrid core has a pore volume of less than 0.10 cc/g;
- and
- wherein the inorganic/organic hybrid core has the formula:
- (A)x(B)y(C)z (IV)
- wherein the order of repeat units A, B, and C may be random, block, or a combination of random and block;
- A is an organic repeat unit which is covalently bonded to one or more repeat units A or B via an organic bond;
- B is an organosiloxane repeat unit which is bonded to one or more repeat units B or C via an inorganic siloxane bond and which may be further bonded to one or more repeat units A or B via an organic bond;
- C is an inorganic repeat unit which is bonded to one or more repeat units B or C via an inorganic bond;
- x and y are positive numbers, and z is a non-negative number, wherein x+y+z=1.
Dependencies are inferred from the claim text.