Innerliner for pnuematic tires

Details Innerliner for pnuematic tires Innerliner for pnuematic tires

1996-09-06

1998-05-26

Knable, Geoffrey L.

Resilient tires and wheels

Tires, resilient

Pneumatic tire or inner tube

152DIG16, 524449, 524451, B60C 514

Patent

active

057558990

ABSTRACT:
It has been unexpectedly found that certain blends of styrene-butadiene rubber and platey filler exhibit both good gas barrier properties and good tensile fatigue properties. These blends accordingly have the requisite characteristics for a tire innerliner material. They offer the advantage of being much less expensive than halobutyl rubbers which can be employed for the same purpose. The present invention more specifically discloses a pneumatic tire having an integral innerliner wherein said innerliner is comprised of a blend of (1) from about 40 phr to about 99 phr of a first styrene-butadiene rubber having a bound styrene content of about 15 percent to about 30 percent, (2) from about 1 phr to about 60 phr of a high styrene content styrene-butadiene rubber having a bound styrene content of about 40 percent to about 60 percent, and (3) from about 40 phr to about 125 phr of platey filler. The subject invention also discloses a pneumatic tire having an integral innerliner wherein said innerliner is comprised of (1) a styrene-butadiene rubber having a bound styrene content of about 15 percent to about 30 percent, and (2) from about 125 phr to about 200 phr of platey filler.

REFERENCES:
patent: 2979470 (1961-04-01), Warren
patent: 3245453 (1966-04-01), Barton et al.
patent: 4157320 (1979-06-01), Yankner et al.
patent: 4963615 (1990-10-01), Yuto
patent: 5178702 (1993-01-01), Frerking, Jr. et al.
patent: 5576372 (1996-11-01), Kresge et al.

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