Chafer rubber composition, and heavy duty pneumatic tyre using the chafer rubber composition
申请人:Sumitomo Rubber Industries Ltd.
公开号:EP1125976A1
公开(公告)日:2001-08-22
The rubber composition for chafer is characterised in that 55-75 parts by weight of carbon black having a nitrogen adsorption specific surface area of 70-120 m2/g and 0.2-0.5 parts by weight of 1, 3-bis (citraconimidomethyl) benzene are blended with respect to 100 parts by weight of a rubber component including 30-50 parts by weight of natural rubber and/or polyisoprene rubber and 50-70 parts by weight of polybutadiene rubber. The pneumatic tyre utilising the chafer rubber composition is excellent in creep resistance, toe-cracking resistance, rim-slippage resistance of a bead portion through its lifetime from the beginning to the end of running, and durability of the bead portion. In the case of a tubeless tyre, it also exhibits good airtightness, thereby ensuring retention of the internal pressure.
用于铁弗所的橡胶组合物的特征在于,以重量计,55-75 份具有 70-120 m2/g 氮吸附比表面积的炭黑和 0.2-0.5 份(重量)的 1,3-双(柠檬酰胺基甲基)苯与 100 份(重量)的橡胶组分混合,橡胶组分包括 30-50 份(重量)的天然橡胶和/或聚异戊二烯橡胶以及 50-70 份(重量)的聚丁二烯橡胶。使用混炼橡胶成分的充气轮胎在抗蠕变性、抗脚趾开裂性、胎圈部分从开始运行到结束的整个寿命期间的抗轮辋滑移性以及胎圈部分的耐用性方面都非常出色。对于无内胎轮胎,它还具有良好的气密性,从而确保内部压力的保持。