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

Claim 0:
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.