Small-globular crosslinked monoallylamine polymer and process for producing the same
AssigneeNitto Boseki Co., Ltd.
InventorsSusumu Harada, Sakuro Hasegawa, Koichi Sato
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Abstract
A small-globular crosslinked polymer of monoallylamine swellable but insoluble in water can be obtained by crosslinking a part of the amino groups of a monoallylamine polymer with formaldehyde or a compound having, in its molecule, at least two functional groups reactive with primary amino group.
Claims8
A crosslinked homopolymer of monoallylamine having appendent primary amino groups and a particle size, when dry, of not more than 2 mm, said polymer being swellable but insoluble in water, wherein at least a part of the primary amine group of an uncrosslinked monoallylamine polymer is crosslinked with formaldehyde or a compound having at least two functional groups reactive with said primary amine groups, said crosslinked homopolymer being prepared by crosslinking the polymeric material while in the form of a dispersion in an immiscible liquid.
A process for producing a crosslinked homopolymer of monoallylamine which comprises dispersing an aqueous solution of a monoallylamine polymer in a liquid medium immiscible with said aqueous solvent and crosslinking at least a part of the amino groups of said polymer with formaldehyde or a compound having at least two functional groups reactive with said amino groups, said crosslinking taking place while the aqueous solution is maintained in said dispersed state.
Dependencies are inferred from the claim text.