Abstract: A cellulose derivative having a long-chain organic group having 5 or more carbon atoms and a short-chain organic group having 4 or less carbon atoms which are introduced by use of hydroxy groups of a cellulose, and including a crystal structure derived from a cellulose derivative portion to which the short-chain organic group is linked, wherein an average number of hydroxy groups per glucose unit is of 1.0 or less.

Abstract: A cellulose resin composition comprising a cellulose derivative and a lubricant, wherein the cellulose derivative is an acylated cellulose obtained by substituting at least a part of hydrogen atoms of hydroxy groups of a cellulose with an acyl group having 2 to 4 carbon atoms, and the content of the lubricant is in the range of 0.1 to 10% by mass. A cellulose resin composition capable of forming a molded body having a high-quality appearance and scratch resistance is provided.

Abstract: A cellulose resin composition comprising a cellulose derivative (A) and a lubricant (B), wherein the cellulose derivative (A) is a cellulose derivative obtained by substituting at least a part of hydrogen atoms of hydroxyl groups of a cellulose with a short-chain organic group having 2 to 4 carbon atoms and a long-chain organic group having 8 to 30 carbon atoms with specific degrees of substitution; the lubricant (B) is at least one selected from the group consisting of a urea compound (B1) having a urea group (—NH—C(?O)—NH—) and an acyclic aliphatic group having 6 to 33 carbon atoms, an amide compound (B2) having an amide group (—C(?O)—NH—) and an acyclic aliphatic group having 6 to 33 carbon atoms, a fatty acid metal salt (B3), and a silicone-based lubricant (B4); and a content of the lubricant (B) is in a range of 0.1 to 10% by mass. A cellulose resin composition capable of forming a molded body having a high-quality appearance and scratch resistance is provided.

Abstract: A paramylon-based resin having a weight-average molecular weight of paramylon in a range of 70000 to 140000, and formed by substituting hydrogen atoms of hydroxy groups of a paramylon with a long-chain component being a linear saturated aliphatic acyl group having 14 or more carbon atoms and a short-chain component being an acyl group (acetyl group or/and propionyl group) having 2 or 3 carbon atoms, wherein a degree of substitution with the long-chain component (DSLo) and a degree of substitution with the short-chain component (DSSh) satisfy the following conditional expressions (1) and (2), Izod impact strength is 5.0 kJ/m2 or more, and an MFR (melt flow rate at 210° C. and under a load of 5 kg) is 2 g/10 min or more. To provide a paramylon-based resin excellent in mechanical characteristics and thermoplasticity. 2.2?DSLo+DSSh?2.

Abstract: A method for producing a cellulose derivative, including reacting a mixed acid anhydride having two particular types of acyl groups with cellulose in the presence of a base catalyst in an organic solvent having an electron pair-donating property to form a cellulose derivative with the two types of acyl groups derived from the mixed acid anhydride, the acyl groups being introduced at hydroxy groups in the cellulose.

Abstract: A cellulose resin composition containing a cellulose resin (A) and a high refractive-index organic material (B), in which the cellulose resin (A) is a cellulose derivative obtained by substituting at least part of hydrogen atoms of hydroxy groups of a cellulose with an acyl group having 2 to 4 carbon atoms and a long-chain organic group having 7 or more carbon atoms, and the mass fraction (B/A) of the high refractive-index organic material (B) to the cellulose resin (A) falls within the range of 10/90 to 70/30.

Abstract: A cellulose derivative obtained by substituting at least part of hydrogen atoms of hydroxy groups of a cellulose with an acyl group having 2 to 4 carbon atoms, a long-chain organic group having 7 or more carbon atoms and a high refractive-index organic group.

Abstract: To provide a cellulose derivative excellent in thermoplasticity, water resistance and strength (elastic modulus, impact strength), a cellulose derivative, which is obtained by introducing a short-chain organic group (acetyl group), a medium-chain organic group having 3 to 5 carbon atoms and a long-chain organic group having 6 to 30 carbon atoms at the following substitution degrees DSs into a cellulose, is used: Short-chain organic group: 0.7?DSSH?1.5; Medium-chain organic group: 0.5?DSME?2.0; Long-chain organic group: 0.1?DSLO<0.5; and 2.4?DSSH+DSME+DSLO?3.

Abstract: Resin compositions according to exemplary embodiments of the present invention are first compositions containing a polylactic acid resin, an aliphatic polyester resin, a surface-treated metal hydrate, and a carbodiimide compound, or second compositions containing a polysiloxane-mixed polyester resin, a phosphorus-containing flame retardant, a metal hydrate and a fluorine-containing polymer in specific ratios.

Abstract: A cellulose resin composition comprising a cellulose derivative (A) and a lubricant (B), wherein the cellulose derivative (A) is a cellulose derivative obtained by substituting at least a part of hydrogen atoms of hydroxyl groups of a cellulose with a short-chain organic group having 2 to 4 carbon atoms and a long-chain organic group having 8 to 30 carbon atoms with specific degrees of substitution; the lubricant (B) is at least one selected from the group consisting of a urea compound (B1) having a urea group (—NH—C(?O)—NH—) and an acyclic aliphatic group having 6 to 33 carbon atoms, an amide compound (B2) having an amide group (—C(?O)—NH—) and an acyclic aliphatic group having 6 to 33 carbon atoms, a fatty acid metal salt (B3), and a silicone-based lubricant (B4); and a content of the lubricant (B) is in a range of 0.1 to 10% by mass. A cellulose resin composition capable of forming a molded body having a high-quality appearance and scratch resistance is provided.

Abstract: A cellulose resin composition comprising a cellulose resin, a high refractive-index organic material and a carbon black, in which the cellulose resin is an acylated cellulose obtained by substituting at least part of hydrogen atoms of hydroxy groups of a cellulose with an acyl group having 2 to 4 carbon atoms, the carbon black is an acidic carbon black, the mass fraction (B/A) of the high refractive-index organic material (B) to the cellulose resin (A) falls within the range of 10/90 to 70/30, and the content of the carbon black (C) relative to the total of the cellulose resin composition falls within the range of 0.05 to 10% by mass.

Abstract: A cellulose resin formed by substituting hydrogen atoms of hydroxy groups of a cellulose with a long-chain component being a linear saturated aliphatic acyl group having 14 or more carbon atoms and a short-chain component being an acyl group having 2 or 3 carbon atoms, in which a degree of substitution with the long-chain component (DSLo) and a degree of substitution with the short-chain component (DSSh) satisfy conditional expressions (1) and (2) shown below: DSLo+DSSh?2.1??(1) 4?DSSh/DSLo?12??(2).

Abstract: A cellulose resin composition comprising a cellulose derivative and a lubricant, wherein the cellulose derivative is an acylated cellulose obtained by substituting at least a part of hydrogen atoms of hydroxy groups of a cellulose with an acyl group having 2 to 4 carbon atoms, and the content of the lubricant is in the range of 0.1 to 10% by mass. A cellulose resin composition capable of forming a molded body having a high-quality appearance and scratch resistance is provided.

Abstract: Resin compositions according to exemplary embodiments of the present invention are first compositions containing a polylactic acid resin, an aliphatic polyester resin, a surface-treated metal hydrate, and a carbodiimide compound, or second compositions containing a polysiloxane-mixed polyester resin, a phosphorus-containing flame retardant, a metal hydrate and a fluorine-containing polymer in specific ratios.

Abstract: A cellulose resin composition comprising a cellulose resin, a high refractive-index organic material and a carbon black, in which the cellulose resin is an acylated cellulose obtained by substituting at least part of hydrogen atoms of hydroxy groups of a cellulose with an acyl group having 2 to 4 carbon atoms, the carbon black is an acidic carbon black, the mass fraction (B/A) of the high refractive-index organic material (B) to the cellulose resin (A) falls within the range of 10/90 to 70/30, and the content of the carbon black (C) relative to the total of the cellulose resin composition falls within the range of 0.05 to 10% by mass.

Abstract: A cellulose derivative obtained by substituting at least part of hydrogen atoms of hydroxy groups of a cellulose with an acyl group having 2 to 4 carbon atoms, a long-chain organic group having 7 or more carbon atoms and a high refractive-index organic group.

Abstract: A cellulose resin composition containing a cellulose resin (A) and a high refractive-index organic material (B), in which the cellulose resin (A) is a cellulose derivative obtained by substituting at least part of hydrogen atoms of hydroxy groups of a cellulose with an acyl group having 2 to 4 carbon atoms and a long-chain organic group having 7 or more carbon atoms, and the mass fraction (B/A) of the high refractive-index organic material (B) to the cellulose resin (A) falls within the range of 10/90 to 70/30.

Abstract: A method for producing a cellulose derivative, including reacting a mixed acid anhydride having two particular types of acyl groups with cellulose in the presence of a base catalyst in an organic solvent having an electron pair-donating property to form a cellulose derivative with the two types of acyl groups derived from the mixed acid anhydride, the acyl groups being introduced at hydroxy groups in the cellulose.

Abstract: A cellulose resin formed by substituting hydrogen atoms of hydroxy groups of a cellulose with a long-chain component being a linear saturated aliphatic acyl group having 14 or more carbon atoms and a short-chain component being an acyl group having 2 or 3 carbon atoms, in which a degree of substitution with the long-chain component (DSLo) and a degree of substitution with the short-chain component (DSSh) satisfy conditional expressions (1) and (2) shown below: DSLo+DSSh?2.1??(1) 4?DSSh/DSLo?12??(2).

Abstract: A process for producing a cellulose derivative, comprising: a first step including reacting a cellulose and a first reactant comprising a long-chain reactant for reacting with a hydroxy group of the cellulose to introduce a long-chain organic group having 5 or more carbon atoms, in a solid-liquid heterogeneous system, to form a cellulose derivative in a swollen state, the cellulose derivative having the long-chain organic group having 5 or more carbon atoms introduced therein and having a part of hydroxy groups of the cellulose remained, and performing solid-liquid separation to obtain the cellulose derivative as an intermediate; and a second step including reacting the intermediate cellulose derivative and a second reactant comprising a short-chain reactant for reacting with a remaining hydroxy group of the intermediate cellulose derivative to introduce a short-chain organic group having 4 or less carbon atoms to form a final cellulose derivative having the short-chain organic group having 4 or less carbon a