Crosslinked methacrylic anhydride copolymers
First Claim
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1. A process for making crosslinked, spherical copolymer beads having a particle size between about 10 μ
- m and about 2 mm which comprisesa. suspending droplets of a monomer mixture comprising methacrylic anhydride in an amount that is at least 50% by weight of the monomer, a crosslinking monomer and a monomer-soluble, free-radical polymerization initiator in an aqueous suspending medium,b. heating the droplets above the decomposition temperature of the polymerization initiator until the monomer mixture has polymerized to form copolymer beads, andc. separating the copolymer beads from the suspending medium.
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Abstract
Suspension-polymerized, crosslinked copolymers of methacrylic anhydride yield beads suitable as precursors for weak-acid and other ion exchange resins, affinity chromatography materials and other materials which require spherical polymers having reactive anhydride groups for their preparation. Both gel and macroporous beads of these copolymers may be made by the process of the invention.
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28 Claims
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1. A process for making crosslinked, spherical copolymer beads having a particle size between about 10 μ
- m and about 2 mm which comprises
a. suspending droplets of a monomer mixture comprising methacrylic anhydride in an amount that is at least 50% by weight of the monomer, a crosslinking monomer and a monomer-soluble, free-radical polymerization initiator in an aqueous suspending medium, b. heating the droplets above the decomposition temperature of the polymerization initiator until the monomer mixture has polymerized to form copolymer beads, and c. separating the copolymer beads from the suspending medium. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28)
- m and about 2 mm which comprises
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