Patent ID: 6186204
Filing Date: 2001-02-13
Classification: B60C,C08K,Y10T

Abstract:
A pneumatic tire comprising a tread portion formed by using a rubber composition which comprises:a rubber component comprising 50 parts by weight or more of SBR in 100 parts by weight of the rubber component;per 100 parts by weight of the rubber component, 20 parts by weight or more of a softener which comprises 5 to 55 parts by weight of at least one resin softener having a softening point of 35 to 150.degree. C. and selected from the group consisting of coumarone resins, phenol-terpene resins, and petroleum hydrocarbon resins; andper 100 parts by weight of the rubber component, 0.2 to 10.0 parts by weight of at least one benzothiazole compound type vulcanization accelerator selected from the group consisting of compounds represented by following general formulae (III), (IV), (V), and (VI): ##STR7##wherein R.sup.3 and R.sup.4 each independently represents a hydrogen atom, an alkyl group having 1 to 8 carbon atoms, or an aryl group having 6 to 10 carbon atoms, excluding the case in which R.sup.3 and R.sup.4 both represent hydrogen atoms; R.sup.5 represents an alkyl group having 1 to 8 carbon atoms, an alkenyl group, or a cycloalkyl group; R.sup.6 represents a hydrogen atom or an amino group represented by --N(R.sup.7)R.sup.8, wherein R.sup.7 and R.sup.8 each independently represents a hydrogen atom, an alkyl group having 2 to 4 carbon atoms, or cyclohexyl group, excluding the case in which R.sup.7 and R.sup.8 both represent hydrogen atoms; R.sup.9 and R.sup.10 each independently represents an alkyl group having 1 to 8 carbon atoms, an alkenyl group, or a cycloalkyl group; X represents a Zn atom, a Cu atom, or an amino group represented by >N--R.sup.13, wherein R.sup.13 represents an alkyl group having 2 to 4 carbon atoms or cyclohexyl group; and R.sup.11 and R.sup.12 each independently represents the same group as that represented by R.sup.9.