Accession Number : AD0764589

Title :   Development of High-Temperature-Resistant Elastomeric Sealant.

Descriptive Note : Final rept. 12 Apr 72-11 Apr 73,

Corporate Author : BOEING COMMERCIAL AIRPLANE CO SEATTLE WASH

Personal Author(s) : Senear,A. E.

Report Date : APR 1973

Pagination or Media Count : 50

Abstract : A one-year program aimed at synthesizing fluorosilicone-hydrofluorocarbon copolymers is reported. Such copolymers were desired as bases for formulating improved pressure sealants for advanced aircraft. Dehydrofluorination of commercial hydrofluorocarbon polymers (Vitons) is described. Attempts to modify chemically dehydrofluorinated Vitons into intermediates capable of cocuring with commercially available fluorosilicones are discussed. Syntheses of some required silane intermediates are given. Preliminary cocuring studies are presented. Some evidence for formation of hydrofluorocarbon-fluorosilicone copolymers was obtained; however, no materials suitable for sealant use were synthesized. (Author)

Descriptors :   (*SEALING COMPOUNDS, *HEAT RESISTANT PLASTICS), (*ELASTOMERS, *HALOCARBON PLASTICS), (*SILICONE PLASTICS, *COPOLYMERIZATION), FLUORINE COMPOUNDS, AIRCRAFT EQUIPMENT, ALKENES, CHEMICAL REACTIONS, INFRARED SPECTRA, NUCLEAR MAGNETIC RESONANCE, CHROMATOGRAPHIC ANALYSIS

Subject Categories : Organic Chemistry
      Polymer Chemistry

Distribution Statement : APPROVED FOR PUBLIC RELEASE