Daicel Corporation

Daicel Chemical Industries, Ltd.

Fuji Photo Film Company, Limited

Hokkaido University

Nippon Paper Industries Co., Ltd.

Shu Shimamoto

Toshikazu Nakamura

Hiroki Taniguchi

Shizuka Ukita

Atsunobu Kiyose

Tsuyoshi Nakamura

Hiroshi Kobayashi

Haruo Konno

Yasumitsu Uraki

Shizuka Okada

Ryoko Yamauchi

Tohru Shibata

Hidekazu Yamazaki

Hiroshi Ohno

Masahiko Murayama

Kazuhiro Shimoda

Yuichiro Shuto

Hiroyuki Takemoto

Naoto Habu

Ko Murakami

Tadashi Takeuchi

Toshinori Okano

Shuuji Yoshioka

Eiji Miyauchi

Toru Ozaki

Hiroyuki Ohno

Toru Shibata

Akihiro Higuchi

Tomohiro Hashizume

Derek Geoffrey Gray

Tatsuya Morita

Tomomi Genda

Yuya Asumi

Akinobu Matsuyama

Hiroki Negishi

Takao Kishimoto

The present invention is to provide a cellulose acetate that has a low total degree of acetyl substitution and a degree of acetyl substitution at 6-position that is lower compared to the degrees of acetyl substitution at 2-position and 3-position of a glucose ring, and has excellent water solubility. A cellulose acetate having: a total degree of acetyl substitution of 0.4 or greater and 0.9 or less, a proportion of a degree of acetyl substitution at 6-position in the total degree of acetyl substitution of 0% or greater and 18% or less, and a light transmittance at 660 nm of 5% or greater in 4 wt. % aqueous solution.

Cellulose acetate and method for producing cellulose acetate

An object is to provide a Th1-increasing agent that can reduce constraints on storage conditions and feeding form and sufficiently increase Th1 at lower doses. A Th1-increasing agent containing a cellulose derivative as an active ingredient, the cellulose derivative having a degree of butyryl substitution of 0.3 or greater and 2.6 or less, and a total degree of substitution of 0.5 or greater and 2.8 or less.

Type 1 helper t cell-increasing agent, food and pharmaceutical

Object of the present invention is to provide an intestinal immune-enhancing agent that can sufficiently increase IgA in the intestinal tract with a low dose while maintaining an increased amount of IgA for an extended period of time. Provided is an intestinal immune-enhancing agent containing a cellulose acetate that has a total degree of acetyl substitution from 0.4 to 1.1.

Intestinal immune-enhancing agent, food product, and medicament

An object of the present disclosure is to provide a cellulose acetate film having excellent bending properties and high transparency. The subject cellulose acetate film contains cellulose acetate having a cellulose triacetate I crystal structure, the cellulose acetate film having a light transmittance of 70% or higher at 660 nm.

Cellulose acetate film and method for producing cellulose acetate film

An object of the present invention is to provide cellulose acetate that has excellent compatibility with a resin, can reinforce a resin, and has excellent thermal stability. An embodiment of the present invention is cellulose acetate having a cellulose triacetate I crystal structure, wherein a temperature at which a weight loss relative to weight at 100&#xb0; C. reaches 5% is 200&#xb0; C. or higher when the cellulose acetate is heated at a heating rate of 10&#xb0; C./min under a nitrogen atmosphere.

Cellulose acetate, cellulose acetate fiber, cellulose acetate composition, method for producing cellulose acetate, and method for producing cellulose acetate composition

Disclosed herein is cellulose acetate fibers that have an excellent affinity for resins and is capable of reinforcing resins. The cellulose acetate fibers have a cellulose triacetate I crystal structure and a number-average fiber diameter of 2 nm or more but 400 nm or less.

Cellulose acetate fibers, cellulose acetate composition, and method for producing same

Provided are a cellulose acetate fiber and a cellulose acetate fiber molded article which are excellent in water solubility and biodegradability and are small in load onto the natural environment even when allowed to stand still in the environment. The invention provides a cellulose acetate fiber containing cellulose acetate having a total degree of acetyl substitution of 0.4 to 1.3 and a compositional distribution index (CDI) of 2.0 or less as well as a cellulose acetate fiber molded article.

Cellulose acetate fiber, cellulose acetate fiber molded article, and methods respectively for producing said cellulose acetate fiber and said cellulose acetate fiber molded article

A nutrient composition contains a cellulose acetate having a total degree of acetyl substitution of 0.4 to 1.1. The cellulose acetate may have a compositional distribution index (CDI) of 2.0 or less, where the CDI is specified by the formula:=(Measured value of half height width of chemical composition)/(Theoretical value of half height width of chemical composition)where the measured value of half height width of chemical composition represents the half height width of chemical composition determined by HPLC analysis of a cellulose acetate propionate prepared by propionylating all residual hydroxy groups of the cellulose acetate (sample); and[Math. 1]the theoretical value of half height width of chemical composition=2.35482&#x221a;{square root over (3**(3)*(1&#x2212;3))}/where DS is the total degree of acetyl substitution; and DPw is a weight-average degree of polymerization determined by a GPC-light scattering method using a cellulose acetate propionate prepared by propionylating all residual hydroxy groups of the cellulose acetate (sample).

Nutrient composition having lipid metabolism-improving action

A cellulose acetate according to the present invention has a total degree of acetyl substitution of 0.4 to 1.1 and has a compositional distribution index (CDI) of 3.0 or less, where the CDI is specified by the formula:CDI=(Measured value of half height width of chemical composition)/(Theoretical value of half height width of chemical composition)where the measured value of half height width of chemical composition is a half height width of chemical composition determined by analyzing a cellulose acetate propionate by HPLC, where the cellulose acetate propionate is prepared by propionylating all residual hydroxy groups of the cellulose acetate (sample); andTheoretical value of half height width of chemical composition=2&#xb7;35482&#x221a;{square root over (3**(/3)*(1&#x2212;/3))}/&#x2003;&#x2003;[Math. 1]where DS is the total degree of acetyl substitution; and DPw is a weight-average degree of polymerization determined by a GPC-light scattering method using a cellulose acetate propionate prepared by propionylating all residual hydroxy groups of the cellulose acetate (sample).

Cellulose acetate with a low degree of substitution

Provided is a novel cellulose derivative having excellent water resistance. This is a cellulose acylate oxoalkanoate which is a cellulose derivative corresponding to cellulose, except with substituents replacing part or all of hydrogen atoms in the hydroxy groups of the cellulose. The substituents includes a group represented by General Formula (1) and a group represented by General Formula (2). The cellulose acylate oxoalkanoate has a degree x of substitution with the group represented by General Formula (1), a degree y of substitution with the group represented by General Formula (2), and a degree z of unsubstitution, where x, y, and z meet conditions specified by Expressions (A), (B), and (C):0.1&#x2264;&#x2264;2.99&#x2003;&#x2003;(A)0.01&#x2264;&#x2264;2.90&#x2003;&#x2003;(B)=3&#x2212;&#x2003;&#x2003;(C) 

Cellulose acylate-oxoalkanoate

A nutrient composition, a lipid metabolism-improving agent, and prophylactic and/or therapeutic agents typically for inflammatory bowel diseases, immune disorders, cancers, non-alcoholic steatohepatitis, obesity, diabetes, and hypercholesterolemia each contain a cellulose acetate having a total degree of acetyl substitution of 0.4 to 1.1. The cellulose acetate may be one having a compositional distribution index (CDI) of 2.0 or less, where the CDI is defined by the formula:CDI=(Measured value of half height width of chemical composition)/(Theoretical value of half height width of chemical composition)

Nutritional composition

A nutrient composition contains a cellulose acetate having a total degree of acetyl substitution of 0.4 to 1.1. The cellulose acetate may have a compositional distribution index (CDI) of 2.0 or less, where the CDI is specified by the formula:CDI=(Measured value of half height width of chemical composition)/(Theoretical value of half height width of chemical composition)where the measured value of half height width of chemical composition represents the half height width of chemical composition determined by HPLC analysis of a cellulose acetate propionate prepared by propionylating all residual hydroxy groups of the cellulose acetate (sample); andthe theoretical value of half height width of chemical composition=2.35482&#x221a;{square root over (3**(/3)*(1&#x2212;/3))}/&#x2003;&#x2003;[Math. 1]where DS is the total degree of acetyl substitution; and DPw is a weight-average degree of polymerization determined by a GPC-light scattering method using a cellulose acetate propionate prepared by propionylating all residual hydroxy groups of the cellulose acetate (sample).

Disclosed herein is a quantum dot composite that can maintain luminous efficiency per unit quantum dot even when a quantum dot concentration is high, and therefore can achieve a high emission intensity. The quantum dot composite includes: a matrix; and quantum dots dispersed in the matrix, wherein the matrix is composed of cellulose acetate having a compositional distribution index (CDI) of 3.0 or less, and a concentration of the quantum dots is 0.05 wt % or higher.

Quantum dot composite and wavelength conversion element, photoelectric conversion device, and solar cell having the composite

Problem to be Solved It is intended to provide a conductive resin composition that exhibits high conductivity even without being supplemented with a special resin or a third component, and a molded article obtained from the resin composition. Solution The conductive cellulose-based resin composition of the present invention comprises (A) an aliphatic cellulose ester and (B) at least one carbon material selected from the group consisting of a single-walled carbon nanotube, a multi-walled carbon nanotube, single-layer graphene, multi-layer graphene, fullerene, and carbon black. The volume resistivity of this conductive cellulose-based resin composition is, for example, 10to 20 &#x3a9;&#xb7;cm, preferably 10to 1 &#x3a9;&#xb7;cm. The content of the carbon material (B) is, for example, 0.5 to 80% by weight of the whole conductive cellulose-based resin composition.

Conductive cellulose-based resin composition

The conductive cellulose-based resin composition of the present invention comprises (A) a cellulose acetate ester having a total degree of acetyl substitution of 0.5 to 1.1 and (B) at least one carbon material selected from the group consisting of single-walled carbon nanotube, multi-walled carbon nanotube, single-layer graphene, multi-layer graphene, fullerene, and carbon black. This conductive cellulose resin composition exhibits high conductivity even without being supplemented with a special resin or a third component. Also, the conductive cellulose-based resin composition can be easily molded in an aqueous system.

Growing community of inventors

Tokyo, Japan

Shu Shimamoto