Patent ID: 11932755
Assignee: HUTCHINSON
Field: Macromolecular chemistry, polymers (Chemistry)
Classification: CPC C  B  F | IPC B  C  F

Claim 28:
29. A fuel hose for a motor vehicle with a combustion or hybrid engine, including a radially internal layer and at least one radially external layer, wherein the radially internal layer is formed from a crosslinked rubber composition which is the product of a chemical crosslinking by a peroxide or a bisphenol of a crosslinkable rubber composition, with the fuel hose further including, between the radially internal and external layers, at least one radially intermediate layer and a textile reinforcement,
wherein the crosslinkable rubber composition is based on at least one fluoroelastomer (FKM) chosen from terpolymers of vinylidene fluoride (VDF)-hexafluoropropylene (HFP)-tetrafluoroethylene (TFE) with a fluorine mass rate greater than or equal to 70%, and comprises 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, 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.