申请人:Bridgestone Corporation
公开号:EP0864604A2
公开(公告)日:1998-09-16
A rubber composition comprising 100 parts by weight of a rubber component which comprises at least one type of rubber selected from the group consisting of natural rubber and diene synthetic rubbers, 0.1 to 10 parts by weight of at least one type of metal dithiophosphate represented by the following general formula, optionally 15 to 85 parts by weight of a reinforcing inorganic filler, and optionally a specific tertiary amine compound in an amount of 0.5 to 15% by weight of the amount of the reinforcing inorganic filler is provided.
wherein R1 and R3 each independently represents an alkyl group or a cycloalkyl group, M represents an antimony atom, a zinc atom, a copper atom, or an iron atom, and n represents a valency of M.
The rubber composition of the present invention exhibits excellent resistance to heat or resistance to heat aging (particularly excellent resistance to hardening and excellent fracture properties).
本发明提供了一种橡胶组合物,该组合物包含 100 重量份的橡胶成分,其中至少包含一种从天然橡胶和二烯合成橡胶组成的组中选出的橡胶、0.1 至 10 重量份的至少一种由以下通式表示的金属二硫代磷酸酯、15 至 85 重量份的补强无机填料和特定叔胺化合物,其中特定叔胺化合物的用量为补强无机填料用量的 0.5 至 15%。
其中 R1 和 R3 各自独立地代表烷基或环烷基,M 代表锑原子、锌原子、铜原子或铁原子,n 代表 M 的化合价。
本发明的橡胶组合物具有优异的耐热性或耐热老化性(尤其是优异的耐硬化性和优异的断裂性能)。