Method for producing chemically modified cellulose fiber
AssigneeDai-Ichi Kogyo Seiyaku Co., Ltd.
InventorsYuka Kitano, Masayuki Hashimoto
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Abstract
Provided is a method for producing a chemically modified cellulose fiber with which fibrillation can be performed along with sulfation reaction. The method for producing a chemically modified cellulose fiber includes a step (a) of treating a cellulose fiber with sulfamic acid to allow a cellulose fine fiber which is a constituent of the cellulose fiber to react with the sulfamic acid, thereby substituting some of hydroxyl groups of cellulose with a substituent represented by a structural formula (1) below (where M represents a monovalent to trivalent cation), and a step (b) of performing fibrillation simultaneously with the step (a).
Claims20
A method for producing a chemically modified cellulose fiber, comprising:
- treating a cellulose fiber with sulfamic acid such that a cellulose fine fiber which is a constituent of the cellulose fiber is allowed to react with the sulfamic acid and that some of hydroxyl groups of cellulose is substituted with a substituent of formula (1)
- where M is a monovalent to trivalent cation;
- and
- performing fibrillation simultaneously with the treating of the cellulose fiber with the sulfamic acid.
Dependencies are inferred from the claim text.