The invention relates to a pneumatic rubber tire having an outer, circumferential tread wherein said tread has a tread configuration comprised of significantly spaced apart, raised lugs designed to be shock absorbingly ground engaging. For such tire, it is intended that, in the field, normally few tread lugs actually engage the ground at any one time in a manner that individual lugs have a relatively significant shock absorbing responsibility. Said tread and associated tread lugs are comprised of a shock dampening closed cellular rubber composition. The rubber for such cellular rubber composition for said tread of spaced apart lugs is comprised of conjugated diene-based elastomers or comprised of elastomers selected from butyl rubber, halogenated butyl rubber or brominated copolymer of isobutylene and paramethylstyrene rubber. Said butyl rubber is a copolymer of isobutylene and a minor amount of a diene monomer such as isoprene. Preferably the rubber for the cellular tread rubber composition is an isobutylene copolymer. Thus, such tread is a combination of structural configuration of spaced apart lugs together with a closed cellular rubber composition of selected elastomer(s) to create a shock absorbing effect for the tire tread lugs.
本发明涉及一种充气橡胶轮胎,该轮胎具有外侧圆周胎面,其中所述胎面具有由明显间隔开的凸起胎耳组成的胎面结构,其设计目的是吸收地面冲击。对于这种轮胎,其设计意图是,在现场,通常很少有胎面凸耳在任何时候以单个凸耳具有相对重要的减震作用的方式实际与地面啮合。所述胎面和相关胎耳由减震封闭式蜂窝橡胶组合物组成。用于所述胎面间隔耳的蜂窝橡胶组合物的橡胶由共轭二烯基弹性体组成,或由选自
丁基橡胶、卤化
丁基橡胶或
异丁烯和对
甲基苯乙烯橡胶的
溴化共聚物的弹性体组成。所述
丁基橡胶是
异丁烯与少量
异戊二烯等二烯单体的共聚物。用于蜂窝胎面橡胶组合物的橡胶最好是
异丁烯共聚物。因此,这种胎面是由间隔开的胎耳结构配置与选定弹性体组成的封闭式蜂窝橡胶组合而成,为轮胎胎面的胎耳产生减震效果。