METHOD FOR PRODUCING MODIFIED SOLUTION-POLYMERIZED DIENE RUBBER TO BE BLENDED WITH SILICA, AND RUBBER COMPOSITION CONTAINING SAME
申请人:Etic Inc.
公开号:EP3351569A1
公开(公告)日:2018-07-25
Studies have been made for the purpose of achieving both the improvement in the storage stability of a solution-polymerized diene rubber that is modified with an alkoxysilane compound and the improvement in the physical properties of the diene rubber when blended with silica. Thus, a production method whereby it becomes possible to produce a modified solution-polymerized diene rubber having good storage stability and high reactivity with silica is developed, by introducing several tens percent of a three blanched or four blanched component that has been coupled with a tin compound into a modified solution-polymerized diene rubber, then coagulating the resultant alkoxysilane modified diene rubber with steam and then drying the coagulated product. In addition, the physical properties of the rubber are further improved successfully by introducing a highly reactive structure to a polymerization initiation terminal of the rubber in the polymerization of the rubber using an alkyl lithium as a polymerization initiator.
为了改善用烷氧基硅烷化合物改性的溶液聚合二烯橡胶的储存稳定性,以及改善二烯橡胶与白炭黑混合时的物理性能,已经进行了相关研究。因此,我们开发了一种生产方法,通过在改性溶液聚合二烯橡胶中引入几十分之一的与锡化合物偶联的三漂或四漂组分,然后用蒸汽凝固由此产生的烷氧基硅烷改性二烯橡胶,再干燥凝固产品,从而生产出具有良好储存稳定性和与白炭黑高反应活性的改性溶液聚合二烯橡胶。此外,在使用烷基锂作为聚合引发剂的橡胶聚合过程中,通过在橡胶的聚合引发端引入高活性结构,成功地进一步改善了橡胶的物理性能。