Phosphoric acid-esterified fine cellulose fiber and method for producing the same
AssigneeOji Holdings Corporation
InventorsYuichi NOGUCHI, Yasutomo NOISHIKI, Ikue HOMMA
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Abstract
Objects of the present invention are to provide a phosphoric acid-esterified fine cellulose fiber of which slurry shows superior transparency, and to provide a method for producing a phosphorylated fine cellulose fiber showing superior transparency with good efficiency and high yield. According to the present invention, there is provided a phosphoric acid-esterified fine cellulose fiber, of which 0.2 mass % aqueous dispersion shows a solution haze of 15% or lower.
Claims11
A phosphoric acid-esterified fine cellulose fiber, of which 0.2 mass % aqueous dispersion shows a solution haze of 15% or lower, and which contains 0.6 mmol/g to 3.8 mmol/g of strongly acidic group derived from phosphoric acid groups.
A phosphoric acid-esterified fine cellulose fiber, which contains 0.6 mmol/g or more of phosphoric acid groups, and wherein a difference of introduction amounts of strongly acidic groups and weakly acidic groups derived from phosphoric acid groups introduced into the cellulose is 0.5 mmol/g or smaller.
A wood pulp which contains cellulose, wherein the cellulose contains 0.6 mmol/g or more of phosphoric acid groups, and a difference of introduction amounts of strongly acidic groups and weakly acidic groups derived from phosphoric acid groups introduced into the cellulose is 0.5 mmol/g or smaller.
A phosphoric acid-esterified fine cellulose fiber, which contains 0.6 mmol/g or more of phosphoric acid groups, and has a polymerization degree of 400 or higher as determined by the copper ethylenediamine method.
Dependencies are inferred from the claim text.