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US 11,697,306 B2Granted
Sealant-containing tire and related processes
AssigneeBridgestone Americas Tire Operations, LLC
InventorsBrian S. Alexander, Bradley S. Plotner, Ross W. Widenor, Jared J. Griebel, Kung-Ching Liao
Life of this patent
Estimating the term…
Abstract
Processes for producing a sealant layer-tire inner liner combination as well as a sealant layer-containing tire and related processes involving the sealant layer-containing tire are disclosed. The sealant layer is adhered to the tire inner liner, has a thickness of 2-8 mm and comprises 100 parts of at least one rubber, 90-500 phr of at least one tackifier, optionally one or more extenders, optionally at least one hydroscopic substance, and a cure package.
Claims19
A process for producing a sealant layer-tire inner liner combination comprising:
- a. providing a tire inner liner, wherein the inner liner includes a radially inward facing surface and a radially outward facing surface,
- b. providing a sealant layer having an upper surface, a lower surface, and a thickness of 2-8 mm, and comprising a mixture of
- i. 100 parts of at least one rubber selected from the group consisting of butyl rubber (optionally halogenated), natural rubber, polyisoprene, polybutadiene rubber, styrene-butadiene rubber, styrene-butadiene-isoprene rubber, isoprene-butadiene rubber, polychloroprene rubber, EPDM, nitrile rubber, polyisobutylene, and combinations thereof, wherein at least 60 parts of the at least one rubber comprise butyl rubber, halogenated butyl rubber, EPDM, or a combination thereof;
- ii. 310-450 phr of at least one tackifier;
- iii. one or more extenders in a total amount of 20 to 35 phr wherein the one or more extenders is selected from the group consisting of carbon black, silica, clay, titanium dioxide, calcium carbonate, graphite, talc, or a combination thereof, wherein carbon black is present in an amount of 20 to 30 phr;
- iv. optionally at least one hydroscopic substance in an amount of 0.5 to 10 phr;
- and
- v. a cure package including a vulcanizing agent limited to a sulfur-based compound and wherein the cure package excludes any peroxide or quinoline compounds;
- and
- c. adhering the sealant layer either:
- i. to the radially inward facing surface of the inner liner so that the lower surface of the sealant layer faces radially outward, or
- ii. to the radially outward facing surface of the inner liner so that the lower surface of the sealant layer faces radially outward,
- thereby producing a sealant layer-tire inner liner combination, wherein the mixture of the sealant layer contains less than 10 phr of any block copolymer and has an elongation at break of 400-1200% at 25° C.
10 more elements
A tire containing a sealant layer comprising
- one or more belts, a road-contacting tread, an inner liner with a radially inward facing surface and a radially outward facing surface, and a sealant layer having an upper surface, a lower surface, and a thickness of 2-8 mm,
- wherein the sealant layer is adhered to either to the radially inward facing surface of the inner liner so that the lower surface of the sealant layer faces radially outward or to the radially outward facing surface of the inner liner so that the lower surface of the sealant layer faces radially outward,
- wherein the sealant layer comprises a mixture of
- i. 100 parts of at least one rubber selected from the group consisting of butyl rubber (optionally halogenated), natural rubber, polyisoprene, polybutadiene rubber, styrene-butadiene rubber, styrene-butadiene-isoprene rubber, isoprene-butadiene rubber, polychloroprene rubber, EPDM, nitrile rubber, polyisobutylene, and combinations thereof, wherein at least 60 parts of the at least one rubber comprise butyl rubber, halogenated butyl rubber, EPDM, or a combination thereof;
- ii. 310-450 phr of at least one tackifier;
- iii. one or more extenders in a total amount of 10 to 35 wherein the one or more extenders is selected from the group consisting of carbon black, silica, clay, titanium dioxide, calcium carbonate, graphite, talc, or a combination thereof, wherein carbon black is present in an amount of 20 to 30 phr;
- iv. optionally at least one hydroscopic substance in an amount of 0.5 to 10 phr;
- and
- v. a cure package including a vulcanizing agent limited to a sulfur-based compound and wherein the cure package excludes any peroxide or quinoline compounds, wherein the mixture of the sealant layer contains less than 10 phr of any block copolymer and has an elongation at break of 400-1200% at 25° C.
6 more elements
Dependencies are inferred from the claim text.