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Abe Y.,Osaka University | Abe Y.,Daihachi Chemical Industry Co. | Amaya T.,Osaka University | Hirao T.,Osaka University
Bulletin of the Chemical Society of Japan | Year: 2014

A practical synthetic approach for poly(2-methoxyaniline-5-phosphonic acid) was developed. The improved method for the monomer synthesis was appropriate for scale-up in view of the yield, purification, and cost compared to the previous method. Polymerization was also performed in a gram scale. © 2014, Chemical Society of Japan. All rights reserved. Source

Amaya T.,Osaka University | Abe Y.,Osaka University | Abe Y.,Daihachi Chemical Industry Co. | Inada Y.,Osaka University | Hirao T.,Osaka University
Tetrahedron Letters | Year: 2014

As a self-doped conducting polyaniline bearing phosphonic acid, poly(2-methoxyaniline-5-phosphonic acid) (PMAP) was synthesized via oxidative polymerization of 2-methoxyaniline-5-phosphonic acid. The pyridinium salt of thus-obtained PMAP was water-soluble and its film exhibited conductivity. Source

Daicel Polymer Ltd. and Daihachi Chemical Industry Co. | Date: 2013-10-15

To provide a cellulose ester composition having good thermoplasticity. The cellulose ester composition including: (A) a cellulose ester and (B) a plasticizer, wherein the plasticizer of the component (B) includes at least one kind selected from adipic acid esters respectively represented by the following formulae (I), (II) and (III).

A flame-retardant agent composition containing an organophosphorous compound represented by the general formula (I): wherein R wherein R

Daihachi Chemical Industry Co. | Date: 2011-05-12

The present invention provides a novel production method which enables obtain a phosphorus compound having both an aromatic substituent and a phosphorinane backbone, without using an expensive hydrogen halide scavenger, without going through a complicated post treatment step or a step of recovering a solvent, and with a favorable yield andpurity. In the present invention, step (1) of allowing phosphorus oxytrihalide to react with a phenol compound or naphthol compound at a molar ratio of 1.1-3.0:1 in the presence of metal halide, and removing unreacted phosphorus oxytrihalide, to produce a mono-substituted phosphorodihalidate; and step (2) of allowing the mono-substituted phosphorodihalidate obtained in the step (1) to react with a diol compound, at a 0.90 to 0.99 molar equivalent based on 1 mole of the halogen atom in the mono-substituted phosphorodihalidate so as to perform a dehydrohalogenation reaction, to obtain a phosphorus compound represented by Formula (V).

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