High temperature oleophobic materials

Details High temperature oleophobic materials High temperature oleophobic materials

G - Physics

01

N

G01N 27/40 (2006.01) C08F 114/26 (2006.01) C08J 7/04 (2006.01) C09D 129/10 (2006.01) G01N 27/407 (2006.01)

Patent

CA 2494096

The application is directed to a gas permeable, oleophobic vent comprising a porous substrate and a coating composition. The coating composition preferably comprises a copolymer of tetrafluoroethylene (TFE) and perfluromethylvinylether (PMVE). Because the vent resists penetration to water and maintains its oleophobicity even when exposed to high temperatures (>=300C) over long periods of time, it finds particular application as an automotive gas sensor vent (10).

L'invention concerne un reniflard oléophobe perméable au gaz, qui comprend un substrat poreux et une composition de revêtement. La composition de revêtement comprend, de préférence, un copolymère de tétrafluoroéthylène (TFE) et de perflurométhylvinyléther (PMVE). Etant donné que le reniflard résiste à la pénétration de l'eau et conserve ses caractéristiques d'oléophobie même lorsqu'il est exposé à des températures élevées (=300·C) pendant une longue durée, il trouve une application particulière comme reniflard de détection d'essence automobile (10).

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