Accession Number : AD0463850


Title :   SYNTHESIS OF HIGH-STRENGTH CHEMICAL RESISTANT ELASTOMERS FOR EXTREME TEMPERATURE SERVICE


Descriptive Note : Final technical rept.


Corporate Author : FMC CORP PRINCETON NJ


Personal Author(s) : Cook, E W ; Erickson, C A ; Gannon, J A


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/463850.pdf


Report Date : Jan 1965


Pagination or Media Count : 90


Abstract : The synthesis of new fluorinated elastomers serviceable at low temperatures is described. Hexafluoroacetone and hydrogen-containing olefins have been found to form both low polymers and hydrogen-containing oxetanes on actinic irradiation. Evidence is presented to show that the intermediate is a biradical. A new elastomer system has been discovered involving the condensation of a polyfluorinated diol with a fluorocarbon diene. This unique fluorinated polyether has been found to have a very low transition temperature (-54 C). Evidence has also been found that a polyfluorinated diol will condense with hexafluorobenzene. Polyurethane polymers have been successfully formed by condensation of a polyfluorinated diol with phosphorous-containing diisocyanates. Several new monomers are described.


Descriptors :   *ELASTOMERS , SILOXANES , TRANSITION TEMPERATURE , SILANES , ISOCYANATES , KETONES , FLUORINE COMPOUNDS , OXYGEN HETEROCYCLIC COMPOUNDS , VINYL PLASTICS , ALKENES , GLYCOLS , ISOCYANIC ACID , BROMINE COMPOUNDS , MONOCYCLIC COMPOUNDS , ORGANIC SULFUR COMPOUNDS , SYNTHESIS(CHEMISTRY) , CHLORINE COMPOUNDS


Subject Categories : Elastomers and Rubber


Distribution Statement : APPROVED FOR PUBLIC RELEASE