Process and product

Process and product

Aromatic polyamide foams having a density of 0.025 to 0.7 g./cm.3 are prepared by heating N,N'-dialkyl aromatic polyamides having at least one beta hydrogen atom on the alkyl groups, a plasticizer and an aromatic sulfonic acid catalyst at 250 DEG to 340 DEG C. for a length of time sufficient to...

Ausführliche Beschreibung

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Bibliographische Detailangaben
1. Verfasser: MEMEGER, WESLEY JR
Format: Patent
Sprache:eng
Schlagworte:
AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G
CHEMISTRY
COMPOSITIONS BASED THEREON
GENERAL PROCESSES OF COMPOUNDING
MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
METALLURGY
ORGANIC MACROMOLECULAR COMPOUNDS
THEIR PREPARATION OR CHEMICAL WORKING-UP
WORKING-UP
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Beschreibung
Zusammenfassung:Aromatic polyamide foams having a density of 0.025 to 0.7 g./cm.3 are prepared by heating N,N'-dialkyl aromatic polyamides having at least one beta hydrogen atom on the alkyl groups, a plasticizer and an aromatic sulfonic acid catalyst at 250 DEG to 340 DEG C. for a length of time sufficient to remove substantially all of the N-alkyl groups.