HETEROCYCLE SULFONE OLIGOMERS AND BLENDS

HETEROCYCLE SULFONE OLIGOMERS AND BLENDS

High thermal stabilities are achievable in linear or multidimensional sulfone, solvent resistant oligomers by incorporated oxazole, thiazole, or imidazole linkages into the oligomer backbone. Blended oligomers of crosslinking oligomers and noncrosslinking compatible polymers are also described. The...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: STEPHENSON, RONALD R, LUBOWITZ, HYMAN R, SHEPPARD, CLYDE H
Format: Patent
Sprache:eng ; fre
Schlagworte:
CHEMISTRY
COMPOSITIONS BASED THEREON
COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
METALLURGY
ORGANIC MACROMOLECULAR COMPOUNDS
THEIR PREPARATION OR CHEMICAL WORKING-UP
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Beschreibung
Zusammenfassung:High thermal stabilities are achievable in linear or multidimensional sulfone, solvent resistant oligomers by incorporated oxazole, thiazole, or imidazole linkages into the oligomer backbone. Blended oligomers of crosslinking oligomers and noncrosslinking compatible polymers are also described. The oligomers include residues of fourfunctional compounds of the formula: (or isomers thereof) wherein M = -CO-, -S-, -O-, -SO2- or -(CF3)2C-; and Y = -OH, -SH, or -NH2. In an improved method, the reactants are condensed at or below ambient temperature in the presence of pyridine in a suitable solvent such as N,N'-dimethylacetamide (DMAC).