The invention provides a process for the preparation of a thermoplastic elastomeric resin composition comprising (a) 100 parts by weight of a block copolymer consisting of at least two polymeric blocks (A) composed of a vinyl aromatic compound and at least one polymeric block (B) composed of a conjugated diene compound, or a hydrogenated block copolymer, (b) 20 to 300 parts by weight of a non-aromatic softening agent for rubber, (c) 1 to 100 parts by weight of a peroxide-crosslinking type olefinic resin or a copolymeric rubber containing said resin, and (d) 10 to 150 parts by weight of a peroxide-decomposition type olefinic resin or a copolymer containing said resin, characterized in that the process comprises a step of heat-processing component (a), component (b), at least a part of component (c) and a part of component (d) in the presence of an organic peroxide to cause crosslinking , and a subsequent step of blending these with the remaining part of component (d) and, if any, the remaining part of component (c). The obtained composition is soft and good in rubber properties, mechanical strength and processability, and is less sticky.
本发明提供了一种制备热塑性弹性
树脂组合物的工艺,该组合物包括:(a) 100 份(重量)嵌段共聚物,该嵌段共聚物由至少两个由
乙烯基芳香族化合物组成的聚合物嵌段(A)和至少一个由共轭二烯化合物组成的聚合物嵌段(B)组成、或氢化嵌段共聚物, (b) 20 至 300 重量份的非芳香族橡胶软化剂, (c) 1 至 100 重量份的过氧化物交联型烯烃
树脂或含有上述
树脂的共聚橡胶、(d) 10 至 150 份(按重量计)过氧化物分解型烯烃
树脂或含有上述
树脂的共聚物,其特征在于该工艺包括在有机过氧化物存在下对组分(a)、组分(b)、至少部分组分(c)和部分组分(d)进行热处理以引起交联的步骤,以及随后将这些组分与组分(d)的剩余部分和(如有)组分(c)的剩余部分混合的步骤。得到的组合物柔软,具有良好的橡胶性能、机械强度和加工性能,粘性较低。