US 11,932,755 B2
Rubber composition, method for preparing same, fuel hose and fuel feed circuit incorporating same
Elise Laborbe, Courtempierre (FR); Mélissande Bichat, Griselles (FR); Antoine Pichon, Amilly (FR); and Laurent Delas, Villemandeur (FR)
Assigned to HUTCHINSON, Paris (FR)
Filed by Hutchinson, Paris (FR)
Filed on Apr. 2, 2020, as Appl. No. 16/838,317.
Claims priority of application No. 19 03699 (FR), filed on Apr. 5, 2019.
Prior Publication US 2020/0317900 A1, Oct. 8, 2020
Int. Cl. C08L 27/18 (2006.01); B29C 48/00 (2019.01); B29L 23/00 (2006.01); B29L 23/24 (2006.01); C08K 3/04 (2006.01); C08K 3/34 (2006.01); C08K 5/13 (2006.01); C08K 5/14 (2006.01); C08K 7/16 (2006.01); C08L 27/16 (2006.01); C08L 27/20 (2006.01); F16L 11/06 (2006.01); F16L 11/08 (2006.01)
CPC C08L 27/18 (2013.01) [B29C 48/022 (2019.02); C08K 3/04 (2013.01); C08K 3/34 (2013.01); C08K 5/13 (2013.01); C08K 5/14 (2013.01); C08K 7/16 (2013.01); C08L 27/16 (2013.01); C08L 27/20 (2013.01); F16L 11/06 (2013.01); F16L 11/08 (2013.01); B29C 2948/92019 (2019.02); B29C 2948/92209 (2019.02); B29L 2023/005 (2013.01); B29L 2023/245 (2013.01); C08K 2201/003 (2013.01); C08K 2201/005 (2013.01); C08K 2201/016 (2013.01); C08L 2203/18 (2013.01); C08L 2205/02 (2013.01); C08L 2205/025 (2013.01); C08L 2205/03 (2013.01)] 30 Claims
OG exemplary drawing
 
1. A crosslinkable rubber composition, the crosslinkable rubber composition being based on at least one fluoroelastomer (FKM) and comprising a filler and a micronised powder of at least one fluorinated thermoplastic polymer which are dispersed in said at least one fluoroelastomer,
wherein the crosslinkable rubber composition comprises said micronised powder according to a quantity greater than 40 phr (phr: parts by weight per 100 parts of parts of elastomer(s)),
wherein the filler comprises at least one inorganic filler having lamellas which has an aspect ratio greater than 30 and which is based on a phyllosilicate chosen from kaolinite and micas, or is based on a talc, said aspect ratio being defined as being the ratio of an average largest dimension over an average smallest dimension of the lamellas, said ratio being measured by a scanning electron microscopy technique,
wherein the crosslinkable rubber composition is able to form an extruded inner layer of a fuel hose for a motor vehicle,
wherein said at least one fluoroelastomer is an FKM chosen from terpolymers of vinylidene fluoride (VDF)-hexafluoropropylene (HFP)-tetrafluoroethylene (TFE) with a fluorine mass rate greater than or equal to 70%, and
wherein the crosslinkable rubber composition comprises at least two of said fluoroelastomers (FKM), comprising a first FKM and a second FKM with respective Mooney viscosities ML(1+10) at 121° C., measured according to the standard ASTM D 1646, comprised between 17 and 21 and between 22 and 26.