Resilient tires and wheels – Tires – resilient – Anti-skid devices
Patent
1991-05-06
1994-05-03
Ball, Michael W.
Resilient tires and wheels
Tires, resilient
Anti-skid devices
152532, 152537, B60C 100, B60C 1100, B60C 918
Patent
active
053078500
ABSTRACT:
The subject invention discloses a pneumatic rubber tire comprised of a toroidal shaped fabric-reinforced rubber carcass and an outer circumferential rubber tread, two spaced substantially inextensible beads and two sidewalls extending radially from and connecting said tread to said beads, said tire characterized by having a circumferential fabric reinforced rubber belt positioned between said tread and supporting carcass where the rubber of said belt is comprised of (A) from about 25 to about 75 weight percent of a highly dispersed blend of syndiotactic 1,2-polybutadiene in synthetic polyisoprene, (B) from about 25 to about 75 weight percent natural rubber, and (C) from 0 to about 40 weight percent polydiene rubbers other than natural rubber. The present invention also reveals the utilization of syndiotactic 1,2-polybutadiene containing rubber compounds in and around the edges of the belt plies as a gum layer and in undertread gum layers. In the practice of the subject invention, it is important for the syndiotactic 1,2-polybutadiene to be highly dispersed throughout the rubber compound. For this reason, syndiotactic 1,2-polybutadiene which is made by inverse phase polymerization is highly preferred.
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Halasa Adel F.
Hsu Wen-Liang
Scriver Richard M.
Ball Michael W.
Johnstone Adrienne C.
Rockhill Alvin T.
The Goodyear Tire & Rubber Company
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