Accession Number:

AD0256811

Title:

SULFUR-NITROGEN SYSTEMS IV. EVALUATION OF SULFAMIDE-MELAMINE-FORMALDEHYDE POLYMERS

Descriptive Note:

Technical rept.

Corporate Author:

PENNSALT CHEMICALS CORP PHILADELPHIA PA

Personal Author(s):

Report Date:

1961-03-01

Pagination or Media Count:

49.0

Abstract:

Acid- and base-catalyzed polymers involving sulfamide, melamine, and formaldehyde were prepared and evaluated. The products are extremely resistant to chemical attack, but their lack of thermal stability decomposition at 225 C in N limits their usefulness for high-temperature APPLICATIONS. Based on the relative thermal stabilities of acid- and base-catalyzed compositions, of both the ternary polymers and those from condensations of sulfamide and formaldehyde, it is suggested that acid-catalysis favors asymmetrical polymerization about the sulfamide fragment. Thermal decomposition at 225 C of the acid-catalyzed product may provide a novel polymerization route to C-N-C- polymer chains. Basic catalysis favors symmetrical polymerization around -SO2- but can produce both di- and tetra-functional sulfamide fragments in the polymerization. The reaction at 225 C of sulfamide-formaldehyde 14 compositions with melamine suggests that basic catalysis can lead to the inclusion of reactive methylol groups as side groups in the polymer. Thermal polymerization of melamine with these -CH2OH groups appears to occur at 225 C. Author

Subject Categories:

Distribution Statement:

APPROVED FOR PUBLIC RELEASE