US2014088235A1PendingUtilityA1

High Purity Perfluoroelastomer Composites and A Process To Produce The Same

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Assignee: GORE & ASSPriority: May 25, 2005Filed: Nov 27, 2013Published: Mar 27, 2014
Est. expiryMay 25, 2025(expired)· nominal 20-yr term from priority
Inventors:Ping XuJack Hegenbarth
C08L 27/12C08L 33/22C08L 27/18C08K 3/36C08L 2205/02C08L 29/10
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Claims

Abstract

High purity perfluoroelastomer composites and processes for producing the same are provided. High purity composites may be formed from compositions comprising a crosslinkable fluoroelastomer terpolymer of TFE, PAVE, and CNVE, and functionalized PTFE, which may be crosslinked to form crosslinked composites having low metal content and low compression set. Emulsion mixtures for forming the high purity composites are also provided.

Claims

exact text as granted — not AI-modified
1 - 15 . (canceled) 
     
     
         16 . An emulsion mixture comprising
 i) a microemulsion of a composition comprising a crosslinkable fluoroelastomer terpolymer consisting essentially of tetrafluoroethylene (TFE), perfluoroalkyl vinyl ether (PAVE), and perfluorocyano vinyl ether (CNVE) monomer units, and   ii) a dispersion of silica.   
     
     
         17 . The emulsion of  claim 16 , wherein CNVE is 8-CNVE. 
     
     
         18 . The emulsion mixture of  claim 16 , wherein a crosslinkable fluoroelastomer composite formed from the emulsion mixture has less than about 3000 ppb metal content. 
     
     
         19 . The emulsion mixture of  claim 16 , wherein a crosslinkable fluoroelastomer composite formed from the emulsion mixture has less than about 2000 ppb metal content. 
     
     
         20 . The emulsion mixture of  claim 16 , wherein a crosslinkable fluoroelastomer composite formed from the emulsion mixture has less than about 1000 ppb metal content. 
     
     
         21 . The emulsion mixture of  claim 16 , wherein a crosslinkable fluoroelastomer composite formed from the emulsion mixture has less than about 500 ppb metal content. 
     
     
         22 . The emulsion mixture of  claim 16 , wherein a crosslinkable fluoroelastomer composite formed from the emulsion mixture has less than about 200 ppb metal content. 
     
     
         23 . An emulsion mixture of  claim 16  wherein the silica is dispersed in iso propanol (IPA). 
     
     
         24 . The emulsion mixture of  claim 16  wherein the silica is hydrophobic silica. 
     
     
         25 . The emulsion mixture of  claim 23  wherein the silica is hydrophobic silica. 
     
     
         26 - 57 . (canceled)

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