Tosoh Finechem Corporation

Tosoh Corporation

Tosoh F-tech, Inc.

Norihisa Kondo

Hideyuki Mimura

Kosuke Kawada

Hideki Miyauchi

Shoji Arai

Takumi Kagawa

Makoto Watanabe

Hideo Sakka

Tomoya Shimono

Shohei Yumino

Hiroshi Matsuo

Daisuke Inoue

Akio Watanabe

Shinichiro Nakamura

Kazunori Nukui

Yusuke Shigeta

Noriyuki Kasai

Takayuki Yamasaki

Shota Nishida

Tomohiro Shirai

Noritaka Nagasaki

Hiroki Kanezaki

A method of stabilizing perfluoro(2-methylene-4-methyl-1,3-dioxolane) (hereinafter simply referred to as a 'stabilization method'), including incorporating at least one selected from the group consisting of a hydroxy group-containing fluoroaromatic compound represented by General Formula (1) below and a hydroxy group-containing fluoroaromatic compound represented by General Formula (2) below into a composition containing perfluoro(2-methylene-4-methyl-1,3-dioxolane): (in the formula, Rto Reach independently represent one selected from the group consisting of a fluorine atom, a perfluoroalkyl group and a hydroxy group, and at least one of Rto Ris a hydroxy group); (in the formula, Rto Reach independently represent one selected from the group consisting of a fluorine atom, a perfluoroalkyl group and a hydroxy group, and at least one of Rto Ris a hydroxy group).

Method of stabilizing perfluoro(2-methylene-4-methyl-1,3-dioxolane) and composition containing stabilized perfluoro(2-methylene-4-methyl-1,3-dioxolane)

Provided is a method of manufacturing a trifluoropyruvyl fluoride dimer, including a reaction step of reacting hexafluoropropylene oxide and aldehyde.

Aldehyde adduct of hexafluoropropylene oxide, method of manufacturing trifluoropyruvyl fluoride dimer and method of manufacturing perfluoro(2,4-dimethyl-2-fluoroformyl-1,3-dioxolane)

To provide a novel fluorine-containing compound that does not include any long chain perfluoroalkyl unit having 8 or more carbon atoms, which is problematic in terms of the environment, and that is excellent in water repellency/oil repellency, and a surface modifier using the compound. [Solution] There are used a fluorine-containing compound represented by the following general formula (1), the following general formula (2) or the following general formula (5): Rf&#x2014;(CR&#x2550;CR&#x2014;X&#x2014;Rf)&#x2014;Y&#x2014;Z (1), Rf&#x2014;(X&#x2014;CR&#x2550;CR&#x2014;Rf)&#x2014;Y&#x2014;Z (2) or Rf&#x2014;(CF&#x2550;CR&#x2014;CR&#x2550;CF&#x2014;Rf)&#x2014;Y&#x2014;Z (5); and a surface modifier using the compound.

Fluorine-containing compound having unsaturated bond, and surface modifier using the same

There is provided a substituted bis(trifluorovinyl)benzene compound that is excellent in heat stability and is industrially useful, and a method for producing the same. There are used a substituted bis(trifluorovinyl)benzene compound represented by general formula (1);   

Substituted bis(trifluorovinyl)benzene compound

The present invention provides a process for producing highly pure fluoro-compounds by making use of N-(2-chloro-1,1,2-trifluoroethyl)diethylamine. The process produces little or no chlorinated by-products. The present invention provides a process for producing a fluoro-compound, comprising fluorinating an alcohol derivative represented by the following general formula (I): RRRCOH (I), (wherein Rrepresents a hydrogen atom, a substituted or unsubstituted alkyl group, aryl group, alkylcarbonyl group, alkoxycarbonyl group, arylcarbonyl group or aryloxycarbonyl group; and Rand Rare each independently a substituted or unsubstituted alkyl group, aryl group, alkylcarbonyl group, alkoxycarbonyl group, arylcarbonyl group or aryloxycarbonyl group, wherein at least two of R, Rand Rmay together form part of a ring structure, either with or without a heteroatom) with N,N-diethyl-2-chloro-1,1,2-trifluoroethylamine to form a fluoro-compound represented by the following general formula (2): RRRCF (2), (wherein R, Rand Rare as defined above), the process being characterized in that an alcohol derivative represented by the following general formula (3): ROH (3), (wherein Rrepresents a substituted or unsubstituted alkyl group or aryl group) is added to the reaction system.

Process for producing fluoro-compounds

The present invention concerns a method for purifying/separating a 2-fluoro-3-oxoalkylcarboxylic acid ester from a reaction mixture resulting from the fluorination of a 3-oxoalkylcarboxylic acid ester. The method involves depleting the reaction mixture of a hydrogen fluoride byproduct; and subsequently, separating the 2-fluoro-3-oxoalkylcarboxylic acid ester by distillation. The 2-fluoro-3-oxoalkylcarboxylic acid ester obtained by the method of the invention is highly pure and is thus suitable for use as an intermediate for the production of pharmacological products or agricultural chemicals.

Method of purifying and separating 2-fluoro-3-oxoalkylcarboxylic acid ester

A process for producing a 2-fluoro-3-oxoalkylcarboxylic acid ester by fluorinating 3-oxoalkylcarboxylic acid ester with a fluorine gas is provided. The process is characterized in that the concentration of 3-oxoalkylcarboxylic acid ester in the reaction mixture for fluorination is maintained at 3 wt % or higher. Also provided is a process for purifying 2-fluoro-3-oxoalkylcarboxylic acid ester characterized in that 2-fluoro-3-oxoalkylcarboxylic acid ester is produced at high yield and with less impurities by washing fluorinated 3-oxoalkylcarboxylic acid ester with 3 or more times as much water as the amount of reaction mixture. According to the processes of the present invention, not only is the generation of unwanted by-products minimized, but fluorinated 3-oxoalkylcarboxylic acid ester can be purified in an efficient manner. Thus, the present invention permits efficient production of considerably pure 2-fluoro-3-oxoalkylcarboxylic acid ester, a useful intermediate material in the production of various medical and agricultural agents.

Process for preparing 2-fluoro-3-oxoalkylcarboxylic acid ester

Brominated p-cumylphenol represented by the formula (1) described hereinafter and derivative thereof represented by the formula (2) described hereinabove, process for the preparation of the same, and flame-retardant resin compositions containing the same, are disclosed. Those compounds are useful flame retardant, and can be blended with various thermosetting resins or thermoplastic resins to obtain flame retardant resin compositions.

Brominated p-cumylphenol flame-retardants for resin composition

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Shunan, Japan

Norihisa Kondo