Flame retardant thermoplastic synthetic resin

A process for producing a solid, intumescent, phosphorus-containing flame retardant for thermoplastic synthetic resins, comprises evaporating to dryness the reaction product of (a) 1 mole of phosphoric acid, phosphorous acid or polyphosphoric acid, (b) 0.5-2 moles of ethylene oxide or glycol, and (c...

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Bibliographische Detailangaben
Hauptverfasser: GRUNDMANN, RABAN, MAAHS, GUENTHER
Format: Patent
Sprache:eng
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Beschreibung
Zusammenfassung:A process for producing a solid, intumescent, phosphorus-containing flame retardant for thermoplastic synthetic resins, comprises evaporating to dryness the reaction product of (a) 1 mole of phosphoric acid, phosphorous acid or polyphosphoric acid, (b) 0.5-2 moles of ethylene oxide or glycol, and (c) 0.2-1 mole of melamine, and tempering the thus-obtained solid at 100 DEG -250 DEG C. The product so obtained can be added to such resins to render them flameproof without deleterious side effects such as discoloration.