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US 7,029,736 B2Granted
Hose construction containing thermoplastic fluoropolymer
AssigneeThe Goodyear Tire & Rubber Company
InventorCarol Lynn Ainsworth
Life of this patent
Estimating the term…
Abstract
The present invention relates to a hose construction containing a thermoplastic fluoropolymer barrier and an epichlorohydrin rubber layer. The hose comprises (A) a rubber layer comprising (1) 100 parts by weight of elastomer comprising epichlorohydrin rubber; and (2) from about 10 to about 100 parts by weight, per 100 parts by weight of elastomer, of silica; wherein the rubber layer is cured with from about 0.1 to about 1.8 parts by weight, per 100 parts by weight of elastomer, of at least one peroxide; (B) a barrier layer adjacent to the rubber layer, the barrier layer comprised of at least one thermoplastic fluoropolymer.
Claims20
A hose comprising
- (A) a rubber layer comprising
- (1) 100 parts by weight of elastomer comprising epichlorohydrin rubber;
- and
- (2) from about 10 to about 100 parts by weight, per 100 parts by weight of elastomer, of silica;
- and
- (3) from about 0.1 to about 1.8 parts by weight, per 100 parts by weight of elastomer, of at least one peroxide;
- (B) a barrier layer adjacent to said rubber layer, said barrier layer comprised of at least one thermoplastic fluoropolymer;
- wherein said at least one peroxide comprises first and second peroxides, wherein the 10 hour decomposition temperature of the first peroxide is greater than the 10 hour decomposition temperature of the second peroxide.
5 more elements
A hose comprising
- (A) a rubber layer comprising
- (1) 100 parts by weight of elastomer comprising a terpolymer of epichlorohydrin monomer, allyl glycidyl ether and ethylene oxide;
- (2) from about 10 to about 100 parts by weight, per 100 parts by weight of elastomer, of silica;
- and
- (3) from about 0.1 to about 1.8 parts by weight, per 100 parts by weight of elastomer, of first and second peroxides, wherein the 10 hour decomposition temperature of the first peroxide is greater than the 10 hour decomposition temperature of the second peroxide;
- (B) a barrier layer adjacent to said rubber layer, said barrier layer comprised of thermoplastic terpolymer of tetrafluoroethylene, hexafluoropropylene and vinylidene fluoride comprising about 30–75 weight percent tetrafluoroethylene, about 5–40 weight percent hexafluoropropylene and about 5–55 weight percent vinylidene fluoride, with 100 weight percent of the monomer weight of the terpolymer made up from the combination of tetrafluoroethylene, hexafluoropropylene and vinylidene fluoride.
3 more elements
A hose comprising
- (A) a rubber layer comprising
- (1) 100 parts by weight of elastomer comprising a terpolymer of epichlorohydrin monomer, allyl glycidyl ether and ethylene oxide;
- (2) from about 10 to about 100 parts by weight, per 100 parts by weight of elastomer, of silica;
- and
- (3) from about 0.1 to about 1.8 parts by weight, per 100 parts by weight of elastomer, of at least one peroxide;
- (B) a barrier layer adjacent to said rubber layer, said barrier layer comprised of a thermoplastic quadpolymer derived from i) tetrafluoroethylene, (ii) vinylidene fluoride, (iii) at least one ethylenically unsaturated monomer of the formula CF2═CFRf where Rf is a perfluoroalkyl or a perfluoroalkoxy of 1 to 8 carbon atoms, and (iv) a perfluorovinyl ether of the formula CF2═CF—(OCF2 CF(Rf))a OR′f where Rf is as described in (iii), R′f is a perfluoroaliphatic, a perfluoroalkyl or a perfluoroalkoxy, of 1 to 8 carbon atoms, and a has a value of 0 to 3.
3 more elements
A method of making a hose, said hose comprising
- (A) a rubber layer comprising
- (1) 100 parts by weight of elastomer comprising epichlorohydrin rubber;
- and
- (2) from about 10 to about 100 parts by weight, per 100 parts by weight of elastomer, of silica;
- and
- (B) a barrier layer adjacent to said rubber layer, said barrier layer comprised of at least one thermoplastic fluoropolymer;
- the method comprising the step of
- curing the rubber layer with from about 0.1 to about 1.8 parts by weight, per 100 parts by weight of elastomer, of at least one peroxide, wherein said at least one peroxide comprises first and second peroxides, wherein the 10 hour decomposition temperature of the first peroxide is greater than the 10 hour decomposition temperature of the second peroxide.
5 more elements
Dependencies are inferred from the claim text.