초록 ▼

Microspheres are produced by cobalt gamma radiation initiated polymerization of a dilute aqueous vinyl pyridine solution. Addition of cross-linking agent provides higher surface area beads. Addition of monomers such as hydroxyethylmethacrylate acrylamide or methacrylamide increases hydrophilic prope

Microspheres are produced by cobalt gamma radiation initiated polymerization of a dilute aqueous vinyl pyridine solution. Addition of cross-linking agent provides higher surface area beads. Addition of monomers such as hydroxyethylmethacrylate acrylamide or methacrylamide increases hydrophilic properties and surface area of the beads. High surface area catalytic supports are formed in the presence of controlled pore glass substrate.

대표청구항 ▼

A composition consisting essentially of discrete beads, at least 80% of which have a uniform diameter from 100 A to 60 microns having a surface area of at least 1 m2/g and consisting essentially of addition copolymerized monomer mixture containing 60 to 80% vinyl pyridine, 10 to 30% of an addition c

A composition consisting essentially of discrete beads, at least 80% of which have a uniform diameter from 100 A to 60 microns having a surface area of at least 1 m2/g and consisting essentially of addition copolymerized monomer mixture containing 60 to 80% vinyl pyridine, 10 to 30% of an addition copolymerizable, water soluble, monounsaturated comonomer selected from acrylamide, methacrylamide, acrylic acid, methacrylic acid or compounds of the formula: [Figure] where R1 is hydrogen or lower alkyl of 1-8 carbon atoms; R2 is alkylene of 1-12 carbon atoms and Z is －OH or [Figure] where R3 or R4 are individually selected from H, lower alkyl or lower alkoxy of 1-8 carbon atoms, and 5 to 30% of a water soluble, addition copolymerizable polyvinyl cross-linking agent said beads including a hard, cross-linked, hydrophobic vinyl pyridine copolymeric core and a hydrophilic, monounsaturated comonomer copolymeric sheath.