DAIHACHI CHEMICAL INDUSTRY CO., LTD.
|DAIHACHI CHEMICAL INDUSTRY CO., LTD. Patent applications|
|Patent application number||Title||Published|
|20130090490||METHOD FOR PRODUCING AROMATIC DIPHOSPHATES - A method for producing an aromatic diphosphate comprising: Step 1 which is a step where a specific aromatic monohydroxy compound having a steric hindrance group at ortho-positions is made to react with phosphorus oxyhalide in the presence of a Lewis acid catalyst and then the unreacted phosphorus oxyhalide is removed under a reduced pressure to give a specific; and Step 2 which is a step where the reaction product obtained in the above step is made to react with a specific aromatic dihydroxy compound in an amount of 0.5 mol to 1 mol of halogen contained in the reaction product in the presence of a Lewis acid catalyst to give a specific aromatic diphosphate.||04-11-2013|
|20130072708||PHOSPHORIC ACID ESTER PRODUCTION METHOD - 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).||03-21-2013|
|20120264965||PROCESSES FOR PRODUCTION OF CYCLIC ALKYLENE PHOSPHOROHALIDITE AND CYCLIC PHOSPHORIC ACID ESTER - A process for producing a cyclic alkylene phosphorohalidite, which comprises reacting a specific phosphorus trihalide with a specific alkylene glycol compound under conditions where the phosphorus trihalide is present in an excess amount relative to the amount of the alkylene glycol compound in the reaction system to order to obtain the cyclic alkylene phosphorohalidite by reacting the alkylene glycol compound with the phosphorus trihalide; and a process for producing a cyclic phosphoric acid ester by using the obtained cyclic alkylene phosphorohalidite as a raw material.||10-18-2012|
|20110263767||PHOSPHORUS FLAME RETARDANT, FLAME-RETARDANT RESIN COMPOSITION CONTAINING SAME, AND MOLDED BODY - A phosphorus flame-retardant composition characterized in that it comprises an aromatic diphosphate compound represented by the general formula (I):||10-27-2011|
|20100168299||Flame-Retardant Polyester Fibers and Preparation Process Thereof - A preparation process of flame-retardant polyester fibers, comprising the steps of: impregnating polyester fibers with a flame retardancy giving liquid containing a phosphorus compound as a flame-retarder represented by the formula (I):||07-01-2010|
|20090062568||PROCESS FOR PREPARING PHOSPHONATES HAVING ALCOHOLIC HYDROXYL GROUP - A novel process for preparing in a high purity and in a high yield phosphonates having a secondary and/or tertiary alcoholic hydroxyl group at the end of a P—C bond chain thereof with the use of a phosphite and a carbonyl compound as raw materials.||03-05-2009|
|20090062554||PROCESS FOR PREPARING PHOSPHORUS COMPOUNDS HAVING PHOSPHATE-PHOSPHONATE BOND - A novel process for preparing in a high purity and in a high yield phosphorus compounds having a phosphate-phosphonate bond within one molecule, along with only a small amount of a by-product, without being restricted by the kind of a phosphonate having an alcoholic hydroxyl group which is a raw material, without using a catalyst such as magnesium chloride, but only using a nitrogen-containing basic compound.||03-05-2009|
Patent applications by DAIHACHI CHEMICAL INDUSTRY CO., LTD.