Vinyl aromatic/diene-block copolymers having good organoleptic properties

    公开(公告)号:US11326014B2

    公开(公告)日:2022-05-10

    申请号:US16622520

    申请日:2018-06-18

    IPC分类号: C08F297/04 C08F6/10

    摘要: The invention relates to a vinyl aromatic/diene-block copolymer A, obtained by an anionic polymerization of a monomer composition, comprising: Al: 60-95 wt.-% of at least one vinyl aromatic monomer, and A2:5-40 wt.-% of at least one diene monomer, wherein the vinyl aromatic/diene-block copolymer A in total comprises less than 10 parts per million (ppm) of acetaldehyde, methacrolein and styrene based on the total amount of vinyl aromatic/diene-block copolymer A; the vinyl aromatic/diene-block copolymer A has improved orgnoleptic properties and is in particular suitable for producing food packaging materials.