Process for the preparation of condensed phosphoric acid esters

An objective of the present invention is to provide a method for preparing a high-purity, condensed phosphoric ester made of a bisphenol A derivative and having a very low content of monomer-type phosphoric ester that causes reduction in the heat resistance and the contamination of the molds during...

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Bibliographische Detailangaben
Hauptverfasser:	FUJISAWA TAKU, NAKAMURA SHIN, OKAWA TAKAFUMI
Format:	Patent
Sprache:	eng
Schlagworte:	ACYCLIC, CARBOCYCLIC OR HETEROCYCLIC COMPOUNDS CONTAININGELEMENTS OTHER THAN CARBON, HYDROGEN, HALOGEN, OXYGEN, NITROGEN,SULFUR, SELENIUM OR TELLURIUM ADHESIVES APPARATUS THEREFOR CHEMISTRY DYES GENERAL METHODS OF ORGANIC CHEMISTRY MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FORELSEWHERE METALLURGY MISCELLANEOUS APPLICATIONS OF MATERIALS MISCELLANEOUS COMPOSITIONS NATURAL RESINS ORGANIC CHEMISTRY PAINTS POLISHES
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Beschreibung
Zusammenfassung:	An objective of the present invention is to provide a method for preparing a high-purity, condensed phosphoric ester made of a bisphenol A derivative and having a very low content of monomer-type phosphoric ester that causes reduction in the heat resistance and the contamination of the molds during the molding when the condensed phosphoric ester is used as an additive for a resin.According to the present invention, a bisphenol A derivative, a phosphorus oxytrihalide and a hydroxy compound are reacted in the presence of a decomposition retardant, whereby the above problems can be solved.