Pneumatic radial tire with specified under-belt pad rubber compo

Details Pneumatic radial tire with specified under-belt pad rubber compo Pneumatic radial tire with specified under-belt pad rubber compo

1998-01-20

2000-10-31

Johnstone, Adrienne C.

Resilient tires and wheels

Tires, resilient

Pneumatic tire or inner tube

152537, B60C 918, B60C 100

Patent

active

061387312

ABSTRACT:
A pneumatic radial tire is provided which comprises an under-belt pad (3) provided circumferentially between edge portions of a belt (1) and a carcass in a shoulder portion thereof, the under-belt pad (3) being of a rubber compound containing 10 to 60 parts by weight of carbon black and 3 to 30 parts by weight of silica with a total amount of carbon black and silica being 20 to 65 parts by weight, 2 to 5 parts by weight of sulfur and 0.5 to 3 parts by weight of resorcin or a resorcin derivative all relative to 100 parts by weight of rubber, and 0.5 to 2 parts by weight of hexamethylene tetratine or a melamine derivative as a methylene donor relative to 1 part by weight of the resorcin or the resorcin derivative, and having a dynamic viscoelasticity E' of 5 MPa to 10 MPa, a loss tangent tan .delta. of 0.10 to 0.18 and a 300% modulus of 11 MPa to 15 MPa.

REFERENCES:
patent: 4082132 (1978-04-01), Arai et al.
Patent Abstracts of Japan, publication No. 05032104, application publication date of Feb. 9, 1993. (Toyo Tire & Rubber Co. Ltd.).
Patent Abstracts of Japan, publication No. 06320904, application publication date of Nov. 22, 1994. (The Yokohama Rubber Co. Ltd.).
Patent Abstracts of Japan, publication No. 07118457, application publication date of May 9, 1995. (Sumitomo Chem. Co. Ltd.).

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