Process for the preparation of crosslinked polyallylamine...

Details Process for the preparation of crosslinked polyallylamine... Process for the preparation of crosslinked polyallylamine...

2008-06-17

2008-06-17

Lipman, Bernard (Department: 1796)

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Mixing of two or more solid polymers; mixing of solid...

C525S328200

Reexamination Certificate

active

07388056

ABSTRACT:
The present invention provides a process for crosslinking of polyallylamine hydrochloride wherein an aqueous solution of polyallylamine hydrochloride is partly neutralized with alkali and epichlorohydrin is added. The aqueous solution is dispersed in an organic medium containing a surfactant. This leads to gelation in individual droplets. The crosslinking in individual gel beads is completed by raising the temperature. The resulting beads are then separated, washed with water, treated with an organic solvent and dried. The method maximizes the yield of crosslinked polyallylamine hydrochloride particles in the range 60-100 mesh.

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