The present invention relates to a thermoplastic elastomer comprising:
(a) a hydrogenated block copolymer having a weight-average molecular weight of 80,000 to 1,000,000, which is obtainable by hydrogenating an (A)-(B) type block copolymer and/or an (A)-(B)-(A) type block copolymer wherein (A) represents a vinyl aromatic compound block and (B) represents a conjugated diene polymer block, such that at least 90% of double bonds of the conjugated diene moiety of the block copolymers are saturated;
(b) an olefin-based crystalline resin;
(c) a hydrocarbon-based softening agent for rubbers; and
(d) an acryl-modified organopolysiloxane,
wherein the weight ratio of the component (a) to the component (b) ((a)/(b)) is 15:85 to 85:15; the component (c) is contained in an amount of 10 to 300 parts by weight based on 100 parts of weight of the component (a); the component (d) is contained in an amount of 0.1 to 10 parts by weight based on 100 parts by weight of the total amount of the components (a) to (c); and at least the components (a) and (d) are dynamically heat-treated in the presence of an organic peroxide. The thermoplastic elastomer of the present invention is excellent in not only flexibility and abrasion resistance, but also dry touch feel.
本发明涉及一种热塑性弹性体,包括
(a) 氢化嵌段共聚物,其重量平均分子量为 80,000 至 1,000,000,可通过氢化(A)-(B)型嵌段共聚物和/或(A)-(B)-(A)型嵌段共聚物获得,其中(A)代表
乙烯基芳香化合物嵌段,(B)代表共轭二烯聚合物嵌段,使得嵌段共聚物的共轭二烯分子中至少 90% 的双键饱和;
(b) 烯烃基结晶
树脂;
(c) 以碳氢化合物为基础的橡胶软化剂;以及
(d)
丙烯酸改性有机聚
硅氧烷、
其中,组分(a)与组分(b)的重量比((a)/(b))为 15:85 至 85:15;以 100 重量份的组分(a)为基准,组分(c)的含量为 10 至 300 重量份;以 100 重量份的组分(a)为基准,组分(d)的含量为 0.在有机过氧化物存在的情况下,至少对组分(a)和(d)进行动态热处理。本发明的热塑性弹性体不仅具有出色的柔韧性和耐磨性,而且还具有出色的干触感。