Mitsubishi Chemical Corporation

Bridgestone Corporation

Oji Holdings Corporation

Hideko Akai

Yasutomo Noishiki

Tomohiro Yamazaki

Noriaki Takahashi

Masahiro Nukui

Go Banzashi

Saaya Takaoka

Kazunori Maruyama

Takashi Kokubo

Hideaki Tanaka

Yuichi Noguchi

Hiroyuki Nagatani

Katsuji Tanaka

Tomokazu Umemoto

Akira Watanabe

Nobuhiko Ueno

Yuqing Xu

Rie Shirahama

Usei Jo

Masanobu Yokoyama

Sachiko Sawada

Noboru Sato

Masahiko Fujimoto

Sachiko Kowata

Takahiro Saitou

The present invention provides a rubber modifier capable of exhibiting good dispersibility in a dispersion thereof and excellent in a rubber-modifying effect such as rubber-reinforcing effect or the likes. The invention relates to a rubber modifier comprising cellulose fibers, in which the number of the cellulose fibers having a fiber length of 450 nm or less, relative to the number of all the cellulose fibers therein, is 50% or more, to a rubber modifier dispersion comprising the rubber modifier and a dispersion medium, and to a rubber composition comprising the rubber modifier and a rubber component.

Rubber modifier, rubber modifier dispersion, and rubber composition

Provided are a method for manufacturing a rubber composition, which method can give a rubber composition provided with excellent reinforcement properties by improving the dispersibility of fibers in a rubber component when the fibers are added to the rubber, a rubber composition obtained using this method, a vulcanized rubber, and a tire. The method is a method for manufacturing a rubber composition comprising short fibers, comprising a dispersion preparation step for preparing a short fiber dispersion by adding the short fibers into a liquid, a mixed dispersion preparation step for preparing a mixed dispersion by adding at least one dispersant selected from the group consisting of carbon black and inorganic compounds into the short fiber dispersion, a mixing step for mixing the mixed dispersion and rubber latex to prepare a rubber-short fiber mixed solution, and a drying step for drying the rubber-short fiber mixed solution to give a rubber composition.

Method for manufacturing rubber composition, rubber composition, vulcanized rubber, and tire

Provided are a rubber composition provided with excellent reinforcement properties by improving the dispersibility of fibers in a rubber component when the fibers are added to the rubber, a method for manufacturing the same, a vulcanized rubber, and a tire. A rubber composition comprising a rubber component and short fibers, wherein the short fibers are cationized. A method for manufacturing the rubber composition, comprising a mixing step for mixing cationized short fibers and rubber latex to prepare a rubber-short fiber mixed solution, and a drying step for drying the rubber-short fiber mixed solution to give a rubber composition.

Rubber composition, method for manufacturing same, vulcanized rubber, and tire

An object of the invention is to provide cellulose fibers which can give a cellulose composite that renders high transparency, a reduction in linear expansion coefficient, and a high modulus of elasticity possible. The invention relates to: a process for producing modified cellulose fibers which includes a modification reaction step of reacting cellulose with an aromatic compound in an organic acid to thereby modify the cellulose with an aromatic-ring-containing substituent; cellulose fibers modified with aromatic-ring-containing substituent; a dispersion of the cellulose fibers; and a cellulose fiber composite obtained from the same.

Modified cellulose fibers and cellulose composite thereof

An object of the present invention is to provide a cellulose fiber assembly and a cellulose fiber composite, each having low coloration. The present invention is directed to a method for preparing a fibrillated cellulose fiber assembly, in which the cellulose fiber raw materials are subjected to a fibrillation treatment and a reduction treatment. The present invention provides a method for preparing a cellulose fiber assembly, comprising a fibrillation step of fibrillating cellulose fiber raw materials to obtain fibrillated cellulose fibers, an assembly preparation step of obtaining a cellulose fiber assembly using the fibrillated cellulose fibers, and a step of carrying out a reduction treatment. Further, the present invention provides a cellulose fiber composite comprising the prepared cellulose fiber assembly and a matrix material.

Cellulose fiber assembly and method for preparing the same, fibrillated cellulose fibers and method for preparing the same, and cellulose fiber composite

To provide a cellulose fiber composite having high transparency, low water absorption and low coefficient of linear thermal expansion. A fiber composite which comprises fibers having an average fiber diameter of at most 30 nm and a matrix material and which has a haze of at most 5 according to JIS K-7136 when the fiber composite has a thickness of 100 &#x3bc;m.

Fiber composite

A recording liquid capable of giving a printed matter which is high in printing density, is suppressed in blur, has high printing quality, and has good fastness of a recorded matter including light fastness, water fastness and the like and having a low viscosity, good discharge properties and excellent storage stability. The invention is concerned with a polyvinyl alcohol based block copolymer represented by the following general formula (1), a pigment dispersion aqueous liquid containing this polyvinyl alcohol based block copolymer and a pigment in an aqueous medium, and a recording liquid containing this pigment dispersion aqueous liquid. wherein A, B, X, X, X, X, m, and mhave the same meanings as defined in the specification.

Polyvinyl alcohol based block copolymer and pigment dispersion aqueous liquid using the same and recording liquid

The present invention provides a process for the preparation of a novel toner satisfying a high resolution, a low temperature fixability and a high offset resistance at a low cost. A novel toner for the development of an electrostatic image is provided comprising an agglomerate of particles containing at least primary polymer particles, wherein said primary polymer particles substantially comprise a wax encapsulated therein.

Toner for the development of electrostatic image and process for the preparation thereof

A polyester comprises a dicarboxylic acid moiety comprising terephthalic acid or its ester forming derivative and a diol moiety comprising ethylene glycol and 1,4-cyclohexanedimethanol of 10 to 60 mol % based on the whole diol moiety, the intrinsic viscosity of the polyester being 0.68 to 0.95 dl/g, the 'b' value of color tone of the produced pellets of polyester being -5 to 5, the number of the carboxylic acid terminals being not more than 30 eq/ton, and the sum of the numbers of the vinyl terminals, the vinylidene terminals and the methylcyclohexene terminals being not more than 25 eq/ton.

Polyester, process for producing the same and molding product therefrom

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Kanagawa, Japan

Hideko Akai