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US 12,503,578 B2Granted
Syndiotactic polybutadiene in non-tire applications
AssigneeBridgestone Americas Tire Operations, LLC
InventorsShammi Ahmed, Yingyi Huang
Life of this patent
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Abstract
An air spring bellow formed from a rubber composition including a rubber component that contains a polyisoprene rubber and syndiotactic 1,2-polybutadiene. The syndiotactic 1,2-polybutadiene has a low crystallinity of 40 percent or less and the rubber composition includes a filler.
Claims19
An air spring bellow comprising a rubber composition, the rubber composition comprising a rubber component comprising:
- a. a rubber selected from the group consisting of a polyisoprene rubber and a neoprene rubber,
- b. 2 to 50 parts by mass of syndiotactic 1,2-polybutadiene per 100 parts by mass of the rubber component, the syndiotactic 1,2-polybutadiene having a crystallinity in the range of 3 to 40 percent,
- wherein the rubber composition is obtained by vulcanizing the rubber composition at a temperature of at least 140° C. and at least 1° to 30° C. above the melting point of the syndiotactic 1,2-polybutadiene, the syndiotactic 1,2-polybutadiene comprising a melting point in the range of 140° to 160° C.
An air spring bellow comprising a rubber composition, the rubber composition comprising a rubber component comprising:
- a. a rubber selected from the group consisting of a polyisoprene rubber and a neoprene rubber,
- b. 2 to 50 parts by mass of syndiotactic 1,2-polybutadiene per 100 parts by mass of the rubber component, the syndiotactic 1,2-polybutadiene having a crystallinity in the range of 3 to 40 percent,
- c. 5 to 50 parts by mass of clay per 100 parts by mass of the rubber component, and
- d. 10 to 85 parts by mass of carbon black per 100 parts by mass of the rubber component,
- wherein the rubber composition is obtained by vulcanizing the rubber composition at a temperature of at least 140° C. and at least 1° to 30° C. above the melting point of the syndiotactic 1,2-polybutadiene, the syndiotactic 1,2-polybutadiene comprising a melting point in the range of 140° to 160° C.
2 more elements
Dependencies are inferred from the claim text.