Radial tires having improved irregular wear resistance employing

Details Radial tires having improved irregular wear resistance employing Radial tires having improved irregular wear resistance employing

1979-09-18

1981-04-14

Goolkasian, John T.

Resilient tires and wheels

Tires, resilient

Anti-skid devices

152330R, 152357R, 152360, 152361R, 152374, 260 336AQ, 525232, 525241, 525236, B60C 918, B60C 1100

Patent

active

042614031

ABSTRACT:
Radial tires having improved irregular wear resistance, which are reinforced with a belt cord layer and a carcass cord layer, characterized in that as the embedding rubber of the belt cord layer, use is made of natural rubber, polyisoprene rubber or a blend rubber consisting of said rubber and less than 30 parts by weight of at least one of polybutadiene rubber and styrene-butadiene copolymer rubber and that for the ground contact area of the tread of tire, a rubber composition consisting of 100 parts by weight of styrene-butadiene copolymer rubber having a viscosity average molecular weight of not less than 2.times.10.sup.5 or a blend rubber consisting of more than 50 parts by weight of said copolymer rubber and at least one of natural rubber, polyisoprene rubber and polybutadiene rubber, 5-60 parts by weight of at least one of a liquid styrene-butadiene copolymer, a liquid polyisoprene polymer and a liquid polybutadiene polymer having a viscosity average molecular weight of 5.times.10.sup.3 -7.times.10.sup.4, and 40-90 parts by weight of a carbon black, is used.

REFERENCES:
patent: 3563922 (1971-02-01), Massoubre
patent: 3830275 (1974-08-01), Russell
patent: 3902542 (1975-09-01), Imamura et al.
"Plasticizers, Softeners, and Extenders", Rubber Technology and Manufacture, Ed. C. M. Blow, C.R.C., 1971, pp. 198-203.

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