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US 7,842,768 B2Granted
Process for macroporous acrylic resins
AssigneeRohm and Haas Company
InventorsJames Charles Bohling, Roy Jeffrey Furbank, Bruce Maurice Rosenbaum
Life of this patent
Estimating the term…
Abstract
A macroporous core-shell resin bead having carboxylic acid groups; the bead has from 3% to 100% of monomer residues derived from crosslinker, an average pore diameter of at least 1.5 nm, and an average particle size from 10 μm to 900 μm; wherein at least 90% of the carboxylic acid groups in the bead are in the shell region, and the shell region comprises from 5% to 75% of the bead by volume.
Claims7
A macroporous core-shell resin bead having carboxylic acid groups;
- said bead comprising a core region surrounded by a shell region;
- said bead having from 3% to 100% of monomer residues derived from crosslinker, an average pore diameter of at least 1.5 nm, and an average particle size from 10 μm to 900 μm;
- wherein at least 90% of the carboxylic acid groups in the bead are in the shell region, and the shell region comprises from 5% to 75% of the bead by volume.
Dependencies are inferred from the claim text.