TETNINGSMEDEL SOM ER DEPOLYMERISATIONSBESTENDIGT VID HEGA TEMPERATURER OCH FORBLIR FLEXIBELT VID LAGA TEMPERATURER FOR TETNING AV BRENSLETANKAR

摘要

Polymers which are flexible down to -40 DEG F. and which do not depolymerize appreciably when heated in a closed space at 500 DEG F. or above have the structure CF3 ¦ CH2 ¦ R2 R2' R2'CH2R2 ¦¦¦¦¦ CH2=CHSiOSiCH2CH2RfCH2CH2SiOSiOmSiCH=CH2. ¦ CH3n These polymers can be cured to rubbers which are solvent resistant and are flexible over a wide temperature range. Such rubbers are useful for sealing aircraft fuel tanks.