Showa Denko K.k.

Shinichi Yorozuya

Hiroshi Kobayashi

Makoto Saito

Katsutoshi Ohno

Yohsuke Fukuchi

Akira Shibuya

Norihito Nishimura

Nozomi Kusumoto

Hidemasa Aoki

Provided is a method for producing a fluorine-containing organic compound. The method can immediately detect the occurrence of a side reaction in direct fluorination reaction using fluorine gas and can give a highly pure fluorine-containing organic compound at a high yield. A raw material liquid () containing a raw material organic compound having a hydrogen atom and two or more carbon atoms is reacted with fluorine gas in a reaction container () to replace the hydrogen atom of the raw material organic compound with a fluorine atom to give a fluorine-containing organic compound. In the reaction, tetrafluoromethane contained in a gas phase () in the reaction container () is continuously measured, and the amount of the fluorine gas supplied to the reaction container () is controlled depending on the measured value of the tetrafluoromethane.

Method and apparatus for producing fluorine-containing organic compound

An object of the present invention is to improve the stability of an ethylenically unsaturated compound having an isocyanate group in the molecule by preventing a polymerization of the ethylenically unsaturated compound. The present invention relates to a stabilizing composition for an isocyanate group-containing ethylenically unsaturated compound, comprising: an isocyanate group-containing ethylenically unsaturated compound (A) which comprises one or more isocyanate groups and one or more ethylenically unsaturated groups in the molecule; and a stabilizing agent (B) which is a compound in which at least one of the ethylenically unsaturated groups in the compound (A) is replaced with an alkyl group which may have a substituent.

Stabilized isocyanate group-containing ethylenically unsaturated compound

Disclosed is an agent for permanent hair waving that can realize permanent hair waving even in the neutral to weakly acidic pH range in which irritation particularly to the skin is not significant. The agent for permanent hair waving includes at least one heterocyclic mercapto compound represented by formula (1): wherein Rand Reach independently represent a hydrogen atom or an optionally substituted alkyl group having 1 to 5 carbon atoms; X represents &#x2014;O&#x2014;, &#x2014;S&#x2014;, &#x2014;NH&#x2014;, or &#x2014;NR&#x2014;; Rrepresents an alkyl group having 1 to 5 carbon atoms; n is an integer of 0 to 2; and, when n is 2, group SH may be attached to any carbon atom of an alkylene group having 2 carbon atoms.

Agent for permanent hair waving containing heterocyclic mercapto compound

A method of the invention industrially produces heterocyclic mercapto compounds useful as raw materials or intermediates in the synthesis of medicaments or pesticides, or as permanent wave agent, with a high yield and high productivity using easily available starting materials. A heterocyclic mercapto compound represented by Formula (1) (wherein X represents any structure of &#x2014;O&#x2014;, &#x2014;S&#x2014;, &#x2014;NH&#x2014;, and &#x2014;NR&#x2014;; Rrepresents any of an alkyl group, alkoxy group and alkoxyalkyl group each having 1 to 6 carbon atoms; Y represents an oxygen atom, a sulfur atom or &#x2014;NR&#x2014;; Rrepresents a hydrogen atom or alkyl group having 1 to 6 carbon atoms; and Zrepresents a divalent organic residue having at least one mercapto group) is produced by reacting a metal sulfide or a metal hydrosulfide with a compound represented by Formula (2) (wherein X and Y are as defined in Formula (1); and Zrepresents a divalent organic residue having at least one halogen group) in the presence of a solvent at a pH of 7.0 to 11.0. 

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Kawasaki, Japan

Shinichi Yorozuya