Toyo Boseki Kabushiki Kaisha

Kyowa Kirin Co., Ltd.

Takahiro Nakajima

Shoichi Gyobu

Mitsuyoshi Kuwata

Ken-ichi Tsukamoto

Tomohiro Danjo

Naoki Watanabe

Fumikazu Yoshida

Maki Sato

Masaou Matsuda

Yoshinao Matsui

Katsuaki Fujiwara

Nobuo Moriyama

Kenichi Tsukamoto

Katsuhiko Kageyama

Toshihiro Seike

Nobumasa Otsubo

Katsuya Ito

Tooru Kitagawa

Hiroaki Taguchi

Yoshitomo Ikehata

Satoru Nakagawa

Hiroki Fukuda

Haruo Matsumoto

Kazuo Katayose

Haruhiko Kohyama

Toshiyuki Tsuchiya

Masaki Fuchikami

Kenichi Funaki

Seisyu Hayashi

Munekazu Okuhara

Hiroki Yamada

An object of the present invention is to provide an &#x3b1;,&#x3b2;-unsaturated amide compound or a pharmaceutically acceptable salt or the like thereof having anticancer activity and the like. The &#x3b1;,&#x3b2;-unsaturated amide compound represented by the following formula (I) or a pharmaceutically acceptable salt or the like thereof has anticancer activity and the like: [wherein, 'A' represents optionally substituted heterocyclic diyl,

&#x3b1;,&#x3b2;-unsaturated amide compound

The present invention provides an &#x3b1;,&#x3b2;-unsaturated amide compound or a pharmaceutically acceptable salt or the like thereof having anticancer activity and the like represented by the following formula (I): [wherein, 'A' represents optionally substituted heterocyclic diyl,

The present invention provides processes for producing polyester. In one of the embodiments, the invention provides a process for producing polyester, comprising adding a catalyst in a polycondensation reaction, esterification reaction or transesterification reaction between components comprising at least a polyfunctional alcohol and at least a polyfunctional carboxylic acid or ester-forming derivative of a polyfunctional carboxylic acid to produce the polyester; and obtaining the polyester, wherein the polymerization catalyst comprises an aluminum substance and a phosphorus compound, wherein the aluminum substance is selected from the group consisting of aluminum hydroxide and aluminum alkoxides, and wherein the phosphorus compound has an aromatic ring structure.

Polyester polymerization catalyst, polyester produced by using the same, and a process for producing polyester

This invention provides a polyester and a polyester molded product, which, while maintaining color tone, transparency, and thermal stability, can realize a high polycondensation rate, are less likely to cause the production of polycondensation catalyst-derived undesired materials, and can simultaneously meet both quality and cost effectiveness requirements, which can exhibit the characteristic features, for example, in the fields of ultrafine fibers, high transparent films for optical use, or ultrahigh transparent molded products. These advantages can be realized by using, in the production of a polyester in the presence of an aluminum compound-containing polyester polycondensation catalyst, an aluminum compound having an absorbance of not more than 0.0132 as measured in the form of an aqueous aluminum compound solution, prepared by dissolving the aluminum compound in pure water to give a concentration of 2.7 g/liter in terms of the amount of aluminum element, under conditions of cell length 1 cm and wavelength 680 nm.

Process for producing polyester, polyester produced using said process, and polyester molded product

Embodiments of the present invention are directed to a polymerization catalyst used to produce polyester. The catalyst comprises at least one metal-containing component, excluding antimony or germanium, and an organic compound component, containing at least one moiety of Ar&#x2014;O&#x2014; or Ar&#x2014;N&#x3c;, where Ar represents an aryl group.

Polymerization catalyst for polyester production, polyester, and process for producing polyester

This invention provides a novel polycondensation catalyst using no antimony compound, polyester produced by using the same, and a process for producing polyester. A novel catalyst comprising an aluminum compound and a phosphorus compound is used as the polycondensation catalyst in producing polyester. The polyester of this invention can be applied to fibers for clothes, fibers for industrial materials, various films, sheets and molded articles such as bottles and engineering plastics, as well as coatings and adhesives.

Polymerization catalyst for polyesters, polyester produced with the same, and process for production of polyester

A novel polymerization catalyst for polyesters, which does not contain any germanium or antimony compound as the main component; polyesters produced with the catalyst; and a process for producing polyesters. This polymerization catalyst is excellent in catalytic activity, little causes thermal degradation of polyesters in melt molding even when neither deactivated nor removed, and can give thermally stable polyesters which little generate foreign matter and are excellent in transparency and color. The polymerization catalyst is one which contains as the first metal-containing component at least one member selected from the group consisting of aluminum and aluminum compounds and which gives polyethylene terephthalate (PET) having a thermal stability parameter (TS) satisfying the relationship: (1) TS&#x3c;0.3.

Polymerization catalyst for polyesters, polyesters produced with the same and process for producing polyesters

This invention provides a novel polymerization catalyst other than antimony compounds, polyester produced by using the same and a process for producing polyester. The polycondensation catalyst of this invention is a polyester polymerization catalyst comprising an aluminum compound and a phosphorus compound having a specific structure. Further, this invention relates to polyester produced by using this polyester polymerization catalyst and a process for producing polyester. Further, this invention relates to fibers, films and hollow molded articles comprising the polyester.

Polyester polymerization catalyst, polyester produced by using the same, and process for producing polyester

A polymerization catalyst for polyester production which contains neither a germanium compound nor an antimony compound as a major component. It contains aluminum as the main metallic ingredient, has excellent catalytic activity, and gives a polyester which is effectively inhibited from suffering thermal degradation, during melt molding, without deactivating or removing the catalyst, and is excellent in thermal stability, stability to thermal oxidation, and hydrolytic resistance. The polymerization catalyst contains as a first metallic ingredient at least one member selected among aluminum and compounds thereof and further contains a phosphorus compound represented by a specific chemical formula. The polyester produced with this catalyst is usable as fibers, films, sheets, various moldings including hollow moldings, etc.

Polymerization catalyst for polyester, polyester produced with the same, and process for producing polyester

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Ohtsu, Japan

Takahiro Nakajima