COMPOSITION THERMOPLASTIQUE IGNIFUGEANTE DE (CO-)POLYMERE VINYLAROMATIQUE

COMPOSITION THERMOPLASTIQUE IGNIFUGEANTE DE (CO-)POLYMERE VINYLAROMATIQUE

The present invention relates to a thermoplastic composition of a vinylaromatic hydrocarbon polymer having a polymeric component and a fire-retarding component. For a total of 100 parts by weight, the composition comprises from 75 to 96 parts by weight of the polymeric component based on a (co)polym...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: BOIDEAU JEAN FRANCOIS, DEXARCIS FRANTZ, COURONNE CLAIRE
Format: Patent
Sprache:fre
Schlagworte:
AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G
CHEMISTRY
COMPOSITIONS BASED THEREON
COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
GENERAL PROCESSES OF COMPOUNDING
METALLURGY
ORGANIC MACROMOLECULAR COMPOUNDS
THEIR PREPARATION OR CHEMICAL WORKING-UP
USE OF INORGANIC OR NON-MACROMOLECULAR ORGANIC SUBSTANCES ASCOMPOUNDING INGREDIENTS
WORKING-UP
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Beschreibung
Zusammenfassung:The present invention relates to a thermoplastic composition of a vinylaromatic hydrocarbon polymer having a polymeric component and a fire-retarding component. For a total of 100 parts by weight, the composition comprises from 75 to 96 parts by weight of the polymeric component based on a (co)polymer (A) of a vinylaromatic hydrocarbon having a weight-average molecular mass from 150000 to 400000 and as a fire-retarding component, (1) from 2 to 10 parts by weight of at least one non-halogenated ester of orthophosphoric acid, and (2) from 2 to 15 parts by weight of at least one (co)polymer (B) of a vinylaromatic hydrocarbon, having a weight-average molecular weight from 2000 to 15000. The compositions exhibit good fire behaviour and have improved properties relating to processing or converting it into finished articles. The present invention relates also to a process and masterbatches to prepare the composition, and a process to improve especially the fire-retarding properties of a vinylaromatic polymer.