PRODUCTION OF PHOSPHINIC ACID ESTER

PROBLEM TO BE SOLVED: To obtain the subject compound useful as a reactive flame-retardant for thermosetting resins, or the like, simply in a high yield by using an elemental yellow phosphorus as a starting raw material. SOLUTION: Elemental yellow phosphorus is reacted with an alkylating agent (prefe...

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Hauptverfasser:	WEFERLING NORBERT DR, BREUER HEINZ-PETER, HOEROLD SEBASTIAN DR, SICKEN MARTIN
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 CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY CHEMISTRY COMPOSITIONS BASED THEREON COMPOSITIONS OF MACROMOLECULAR COMPOUNDS DYES GENERAL METHODS OF ORGANIC CHEMISTRY MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FORELSEWHERE METALLURGY MISCELLANEOUS APPLICATIONS OF MATERIALS MISCELLANEOUS COMPOSITIONS NATURAL RESINS ORGANIC CHEMISTRY ORGANIC MACROMOLECULAR COMPOUNDS PAINTS PERFORMING OPERATIONS PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL POLISHES THEIR PREPARATION OR CHEMICAL WORKING-UP THEIR RELEVANT APPARATUS TRANSPORTING USE OF INORGANIC OR NON-MACROMOLECULAR ORGANIC SUBSTANCES ASCOMPOUNDING INGREDIENTS
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Beschreibung
Zusammenfassung:	PROBLEM TO BE SOLVED: To obtain the subject compound useful as a reactive flame-retardant for thermosetting resins, or the like, simply in a high yield by using an elemental yellow phosphorus as a starting raw material. SOLUTION: Elemental yellow phosphorus is reacted with an alkylating agent (preferably an alkyl halide, a dialkyl sulfate, or the like, especially preferably methyl chloride, methyl bromide and/or dimethyl sulfate) in the presence of a base (preferably a hydroxide, a carbonate, or the like) to give a mixture comprising (A) an alkylphosphonous acid, (B) phosphorous acid and (C) phosphinic acid as main components. Then the main components of the mixture are esterified to give an ester mixture, from which the ester of the component A is separated. The obtained ester of the component A is added to a functional group-containing olefin to give a phosphinic acid ester. The obtained phosphinic acid ester can be used as a reactive flame-retardant for polymers such as a thermoplastic polymer.