Very soft, non-sticky and transparent styrenic thermoplastic elastomer composition
申请人:INEOS STYROLUTION GROUP GMBH
公开号:US11066503B2
公开(公告)日:2021-07-20
Thermoplastic elastomer compositions can be used for medical skin contact applications, comprising: a) 90.9 to 69.0 wt.-% star-shaped block copolymer A with 4 arms of the general structure [S1—(S/B)k—(S/B)I—(S/B)m—S2]n—X, where S1 and S2 are vinylaro-matic hard polymer and S/B are soft random vinylaromatic/diene copolymer blocks; X is a coupling center; and b) 9.1 to 31.0 wt.-% of a plasticizer B: b1) a mixture of mineral oil B1 and cyclohexane 1,2-dicarboxylic acid C8 to C10 dialkyl ester B2; or b2) a mixture of mineral oil B1 and vegetable oil B3.
热塑性弹性体组合物可用于医疗皮肤接触应用,包括: a) 90.9 至 69.0 wt.-%的星形嵌段共聚物 A,具有 4 个臂的一般结构 [S1-(S/B)k-(S/B)I-(S/B)m-S2]n-X,其中 S1 和 S2 是乙烯基芳香族硬聚合物,S/B 是软无规乙烯基芳香族/二烯共聚物嵌段;X 是偶联中心;以及 b) 9.1 至 31.0 wt.-%的增塑剂 Bb1) 矿物油 B1 和环己烷 1,2-二羧酸 C8 至 C10 二烷基酯 B2 的混合物;或 b2) 矿物油 B1 和植物油 B3 的混合物。