防老剂挥发性及其轮胎胶料气味的研究

Study on Volatility of Antioxidants and Their Influence on Tire Compound Odor

分析防老剂在模拟轮胎生产工序工艺条件下的挥发特性,并将其挥发性物质与整车厂家关注的挥发性有机化合物(VOCs)和REACH法规高度关注的物质(SVHC)清单进行比对;分析不同防老剂组合轮胎胎侧胶,确定胎侧胶的挥发性物质以及挥发量与放置时间的关系,判定影响胎侧胶气味的主要因素。结果表明:在轮胎生产过程中防老剂的VOCs挥发量较小,与受热温度呈正相关性;不同防老剂的稳定性不同,挥发性物质气味也有差异;促进剂是胎侧胶主要挥发性物质的产生体,经高温(80℃)停放一定时间后胎侧胶的挥发量明显减小;加强原材料控制、保证原料供应的连续性和稳定性、优化配方和工艺是减小轮胎VOCs挥发量及气味的方法。

The volatilization characteristics of antioxidants under simulated tire production process conditions were analyzed,and their volatile substances were compared with the volatile organic compounds(VOCs)listed by vehicle manufacturers and substances of very high concern(SVHC)by REACH regulations.The sidewall compounds of tire with different antioxidant combinations were analyzed to determine the relationship between the type and amount of the volatile substances of sidewall compound and the placement time,and to determine the main factors affecting the odor of sidewall compound.The results showed that,the VOCs amount of antioxidant in tire production process was small and positively correlated with heating temperature.The stability of different antioxidants was different,and the odor of volatile substances was also different.The accelerator was the main volatile substances producer of sidewall compound,and the volatilization of sidewall compound decreased significantly after parking at high temperature(80℃)for a certain period of time.The methods to reduce VOCs and odor of tires were to strengthen raw material control,ensure the continuity and stability of raw material supply,and optimize formulation and process.