Process for producing grosslinked starch derivatives and crosslinked starch derivatives produced by the same
AssigneeJapan Atomic Energy Research Institute
InventorsFumio Yoshii, Tamikazu Kume
Life of this patent
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Abstract
A paste of starch derivative is crosslinked by irradiation with γ-rays or electron beams in a dose of 0.1-200 kGy. Two different levels of crosslinking are performed; the first is mild crosslinking by irradiation at a low dose of 0.1-1.0 kGy to such an extent that the viscosity of the overall system increases upon immersion in water, and the second is intensive crosslinking by irradiation at a higher dose than 1.0 kGy to produce a gel that is completely insoluble in water.
Claims10
A process for producing biodegradable crosslinked starch derivatives by irradiating a pasty mixture of 100 parts by weight of a starch derivative and 3-1,000 parts by weight of water, wherein the starch derivative is selected from the group consisting of carboxyl starch, hydroxyl starch, alkyl starch, and mixtures thereof, which have at least one hydroxyl or carboxyl group per glucose unit.
Dependencies are inferred from the claim text.