Japan Elastomer Co., Ltd.

Asahi Kasei Kabushiki Kaisha

Hideki Yamasaki

Atsushi Yasumoto

Yoshifumi Araki

Takaaki Matsuda

Tsuneaki Konomoto

Shouzou Akagi

A packaged molded article containing: a molded article of a rubber-like polymer having a weight average molecular weight of 100,000 or more, and a packaging film packaging the molded article, wherein a portion facing the molded article, of the packaging film, satisfies the following conditions (1) and (2): <Condition (1)> the portion has 50 or more openings; <Condition (2)> a total area ratio of the openings is 0.1% or more and 15% or less with respect to a total area of the portion facing the molded article.

Packaged molded article, crosslinking rubber composition, method for producing packaged molded article, method for producing crosslinking rubber composition, and tread for tire

A conjugated diene polymer satisfying following conditions (1) to (4):

Conjugated diene polymer, conjugated diene polymer composition, and tire

A modified conjugated diene polymer satisfying the following conditions (I) to (IV):

Modified conjugated diene polymer, modified conjugated diene polymer composition, tire, and method for producing modified conjugated diene polymer

The present invention provides a conjugated diene-based polymer containing at least one conjugated diene monomer, wherein 40% or more of the end thereof has an amino group and an amide group, and the indicator b* value of yellowness, as measured with a colorimetric color difference meter, is 15 or less.

Conjugated diene-based polymer, method for producing the same, and composition including the same

Disclosed is a rubbery polymer comprising a conjugated diene polymer, and bonded thereto, a lithium-detached residue of a lithium-containing organic polymer used as a catalyst in the production of the conjugated diene polymer, wherein the lithium-containing organic polymer is obtained by reacting an organolithium compound with a first polymerizable material comprising at least one conjugated diene monomer and a second polymerizable material comprising at least one aromatic vinyl compound, which second polymerizable material contains at least one multi-vinyl aromatic compound having at least two vinyl groups, and wherein the lithium-containing organic polymer has a specific narrow molecular weight distribution. The rubbery polymer of the present invention is commercially advantageous in that, by using it as a reinforcing agent for a styrene polymer resin, there can be obtained a high impact styrene polymer resin composition which is useful for producing shaped articles having an excellent balance of impact resistance and appearance (luster).

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Tokyo, Japan

Hideki Yamasaki