Kuraray Co., Ltd.

Atsuhisa Ogawa

Kazushige Ishiura

Hideo Takamatsu

Kenji Shachi

Akio Ohmory

Masahiro Satoh

Toshiaki Ikimine

Atsushi Itou

Mitsuo Mayahara

Jun-ichi Hikasa

Tadashi Saito

Tsutomu Yamada

Hisashi Suemori

A reinforcing material for incorporation into a kneaded and shaped hydraulic material, comprising a fiber having a fineness of 5 d or more, an aspect ratio of from 10-500, a breaking tenacity of 5 g/d or more, an elongation (A) of from 6-20%, a flexing tenacity utilization factor (B) of 35% or more, and (B).ltoreq.4 (A).

Reinforcing material for kneaded and formed hydraulic material, and

Herein disclosed are a block copolymer having an isobutylene-based polymer block and a vinylic aromatic hydrocarbon-based polymer block and containing a styrenic unit having a halogenated saturated aliphatic hydrocarbon group on the benzene ring at 0.01 to 2 mol % on a basis of the total structural units and being capable of markedly improving the performance of a synthetic resin when the block copolymer is blended with the synthetic resin; a process for producing the block copolymer; and a resin composition position containing the block copolymer.

Block copolymer, process for producing the same and resin composition of

A rubber composition having excellent processability and improved dispersion state of carbon black containing:

Rubber composition containing a terminally-functionalized low molecular

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Okayama-Pref., Japan

Atsuhisa Ogawa