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US 6,279,616 B1Granted
Rubber compositions, hose manufactured therefrom, and method of manufacturing hose
OwnerThomas C. Croft, Kevin T. Perkinsinventors
Life of this patent
Estimating the term…
Abstract
A rubber composition includes acrylonitrile butadiene,polychloroprene and polyoctanamer. The rubber composition is particularly useful in making the tubular portion of reinforced rubber base which has brass-coated metal braiding therearound. By using this rubber composition, the process of manufacturing reinforced rubber hose is enhanced because the compound is easily mixed, the need of process aids is minimized, and the freezing temperature necessary to crystallize the rubber is reduced.
Claims15
A hose structure comprising:
- a rubber composition formed into a rubber tube, the rubber composition comprising:
- a first component selected from a group consisting of acrylonitrile butadiene, rubber chlorinated polyethylene, chlorosulfonated polyethylene and polychloroprene;
- a second component selected from the group consisting of polychloroprene, acrylonitrile butadiene rubber and chlorosulfonated polyethylene, the second component not duplicating the first component, and
- a third component selected from the group consisting of polyoctanamer, polyisoprene, polybutadiene and styrene butadiene rubber,
- wherein the first component is about 70 to about 90 phr, the second component is about 15 to about 25 phr, and the third component is about 2 to about 10 phr, and metal reinforcement formed around and bonded to the rubber tube;
- the components having been mixed and heated to a temperature in the range of about 140° F. to about 150° F. before being extruded and then having been exposed to freezing at a temperature in the range of about 0° F. before having the metal reinforcement formed therearound.
3 more elements
A hose structure comprising:
- a rubber composition formed into a rubber tube, the rubber composition consisting essentially of 100 phr of a base rubber comprising about 70 to about 85 phr acrylonitrile butadiene rubber, about 15 to about 20 parts polychloroprene and about 2 to 10 phr polyoctanamer, and
- metal reinforcement formed around and bonded to the rubber tube;
- the components having been mixed and heated to a temperature in the range of about 140° F.
A process for making reinforced hose comprising:
- mixing a composition comprised acrylonitrite butadiene rubber, polychloroprene and polyoctanamer to provide a rubber compound at a temperature in the range of about 300° F. to about 360° F. for about 3 to about 20 minutes;
- extruding the composition as a tube at a rate of about 20 to about 80 feet per minute while at a temperature in the range of about 140° F. to about 200° F.;
- freezing the rubber tube at a temperature of about 0° F. to about −150° F. to crystallize the rubber,
- and braiding wire reinforcement around the rubber tube after the tube has been crystallized by freezing.
1 more element
Dependencies are inferred from the claim text.