COMPOSITIONS D'OLIGOMERES POLYTHIOPYRIDINES A TERMINAISONS HALOGENEES, LEUR PREPARATION ET LEUR UTILISATION POUR LA FABRICATION DE RESINES THERMOSTABLES

COMPOSITIONS D'OLIGOMERES POLYTHIOPYRIDINES A TERMINAISONS HALOGENEES, LEUR PREPARATION ET LEUR UTILISATION POUR LA FABRICATION DE RESINES THERMOSTABLES

Compositions of oligomers of polythiopyridine type with halogenated ends comprising at least one oligomer denoted by the general formula: in which the valences of the pyridine rings are in 2,4, 2,6 or 3,5 positions, n is an integer from 2 to 20 and X is a halogen atom. They generally have a number-a...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: BEN HATEM ROMDHANE, BERNARD SILLION, SYLVIE BOILEAU, MICHEL BARTHOLIN
Format: Patent
Sprache:fre
Schlagworte:
CHEMISTRY
COMPOSITIONS BASED THEREON
HETEROCYCLIC COMPOUNDS
MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
METALLURGY
ORGANIC CHEMISTRY
ORGANIC MACROMOLECULAR COMPOUNDS
THEIR PREPARATION OR CHEMICAL WORKING-UP
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Beschreibung
Zusammenfassung:Compositions of oligomers of polythiopyridine type with halogenated ends comprising at least one oligomer denoted by the general formula: in which the valences of the pyridine rings are in 2,4, 2,6 or 3,5 positions, n is an integer from 2 to 20 and X is a halogen atom. They generally have a number-average molecular mass of 200 to 10,000. They can be prepared by the reaction of sodium sulphide with a dihalopyridine, for example in a molar ratio of approximately 1.05 to 1.5. They can be employed for the manufacture of thermally stable resins.