Toyota Jidosha Kabushiki Kaisha

Zeon Corporation

Kyoto University

Kabushiki Kaisha Toyota Chuo Kenkyusho

Makoto Ouchi

Arimitsu Usuki

Shigetaka Hayano

Hirotaka Okamoto

Shingo Okuno

Mitsuru Nakano

Fumiaki Bando

Hisashi Okuyama

Mitsuo Sawamoto

Takeshi Kanamori

Hisato Takeuchi

Yuji Kageyama

Seiji Yamashita

Hiroshi Urayama

Yasumitsu Isobe

Naomi Okuyama, Legal Representative

Takashi Inou

Conjugated diene polymer comprising at least a conjugated diene monomer unit, the conjugated diene polymer has a number-average molecular weight (Mn) in terms of polystyrene of 1,000 to 1,000,000, a ratio (Mw/Mn) of a weight-average molecular weight (Mw) to the number-average molecular weight (Mn) of lower than 2.0 and the polymer bears a halogen atom at a terminal of the polymer chain. Method for producing the conjugated diene polymer comprises subjecting a monomer containing at least a conjugated diene to living radical polymerization using a polymerization initiator comprising a halogenocyclopentadienyl triorganophosphine &#x3b7;-olefin ruthenium complex represented by formula (6) (and an organic halide. 

Conjugated diene polymer and method for producing same

This invention provides a polylactic acid resin composition in which stereocomplex crystals of poly-L-lactic acid and poly-D-lactic acid can be selectively crystallized to obtain polylactic acid having a sufficiently high speed of crystallization and a sufficiently high ratio of stereocomplex crystal and a molded article thereof obtained via melt molding and crystallization of the same. Such polylactic acid resin composition comprises polylactic acid capable of generating stereocomplex crystallization and an aromatic urea compound represented by formula (1): wherein Rrepresents an alkylene group having 1 to 10 carbon atoms; Rrepresents an alkyl group having 1 to 25 carbon atoms; and m is an integer between 1 to 6.

Polylactic acid resin and composition and molded article of the same

The polylactic acid composite material of the present invention comprises a polylactic acid, a low molecular weight compound which has an amide group, and a layered clay mineral that is organically modified by means of an organic onium salt. As a result, a polylactic acid composite material that has a sufficiently rapid crystallization rate, and that is superior in terms of heat resistance, moldability and mold release characteristics can be obtained.

Polylactic acid composite material and molded body

Growing community of inventors

Kyoto, Japan

Makoto Ouchi