Tire compounds containing syndiotactic-1,2-polybutadiene

Details Tire compounds containing syndiotactic-1,2-polybutadiene Tire compounds containing syndiotactic-1,2-polybutadiene

1987-09-11

1988-12-13

Lieberman, Allan M.

Resilient tires and wheels

Tires, resilient

Pneumatic tire or inner tube

152DIG16, 525236, 525237, B60C 100, B60C 2104, C08L 900, C08L 1502

Patent

active

047903651

ABSTRACT:
The subject invention discloses the use of syndiotactic-1,2-polybutadiene in the supporting carcass and/or innerliner of a tire. The incorporation of syndiotactic-1,2-polybutadiene into rubber compositions which are utilized in the supporting carcass or innerliner of tires greatly improves the green strength of those compositions. The incorporation of syndiotactic-1,2-polybutadiene into halogenated butyl rubbers which are utilized as innerliner compositions also greatly improves the scorch safety of such compositions. The subject invention more specifically discloses a pneumatic rubber tire which comprises a circumferential rubber tread, a supporting carcass therefor, two spaced beads, two rubber sidewalls connecting said beads and an innerliner; wherein said supporting carcass is comprised of from 1 to 25 phr of syndiotactic-1,2-polybutadiene having a melting point which is within the range of 120.degree. C. to 190.degree. C. and at least one rubber selected from the group consisting of polyisoprene, styrene-butadiene rubber, and polybutadiene rubber.

REFERENCES:
patent: 4220564 (1980-09-01), Tanimoto et al.
patent: 4394473 (1983-07-01), Winter et al.

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