21.
    发明专利
    未知

    公开(公告)号:AT405598T

    公开(公告)日:2008-09-15

    申请号:AT06111958

    申请日:2000-03-23

    Applicant: BASF SE

    Abstract: In a block copolymer (I) containing at least two hard blocks (S1, S2) prepared from a vinylaromatic monomer (M1) and, between them, at least one soft block (BS) prepared from M1 and a diene (M2), the proportion of hard blocks is over 40 wt.% of total (I). Independent claims are also included for the following: (a) mixtures of (I) and additional styrene polymers; and (b) preparation of (I) by sequential anionic polymerization, with at least polymerization of BS being in presence of a potassium salt.

    MEZCLAS TRANSPARENTES DE COPOLIMEROS BLOQUE DE ESTIRENO-BUTADIENO.

    公开(公告)号:ES2328123T3

    公开(公告)日:2009-11-10

    申请号:ES02803779

    申请日:2002-11-19

    Applicant: BASF SE

    Abstract: Mezclas que contienen copolímeros bloque, lineales, que están constituidos por monómeros vinilaromáticos y por dienos de la estructura S1 - B1 - S2 (I) y S3 - B2 - S4, (II) significando S1 un bloque constituido por monómeros vinilaromáticos con un peso molecular promedio en número Mn situado en el intervalo comprendido entre 40.000 y 70.000 g/mol, significando S2, S3 y S4 respectivamente bloques constituidos por monómeros vinilaromáticos con un peso molecular promedio en número Mn situado en el intervalo comprendido entre 5.000 y 20.000 g/mol, significando B1 y B2 respectivamente bloques constituidos por dienos o por bloques copolímeros constituidos por dienos y por monómeros vinilaromáticos con un peso molecular promedio en númeroMn situado en el intervalo comprendido entre 15.000 y 40.000 g/mol, y encontrándose situada la relación entre los copolímeros bloque (I)/(II) en el intervalo comprendido entre 0,6 y 2.

    26.
    发明专利
    未知

    公开(公告)号:DE50213749D1

    公开(公告)日:2009-09-17

    申请号:DE50213749

    申请日:2002-11-19

    Applicant: BASF SE

    Abstract: The present invention relates to mixtures comprising linear block copolymers made from vinylaromatic monomers and from dienes of the structure (I) S 1 -B 1 -S 2 and (II) S 3 -B 2 -S 4 , where S 1 is a block made from vinylaromatic monomers with number-average molar mass M n in the range from 40,000 to 100,000 g/mol, each of S 2 , S 3 and S 4 is a block made from vinylaromatic monomers with number-average molar mass M n in the range from 5,000 to 20,000 g/mol, each of B 1 and B 2 is a block made from dienes or a copolymer block made from dienes and from vinylaromatic monomers with numberaverage molar mass M n in the range from 15,000 to 40,000 g/mol, and the ratio of the block copolymers (I)/(II) is in the range from 0.6 to 2.

    HIGHLY TRANSPARENT AND TOUGH-STIFF STYRENE-BUTADIENE BLOCK COPOLYMER MIXTURES

    公开(公告)号:CA2655065A1

    公开(公告)日:2008-01-03

    申请号:CA2655065

    申请日:2007-06-13

    Applicant: BASF SE

    Abstract: A mixture, which contains a) 25 to 75% by weight of a block copolymer A, which contains at least one hard block S of vinyl aromatic monomers and one or more soft blocks BA of, in each case, 0 to 5% by weight of vinyl aromatic monomers and 95 to 100% by weight of dienes, the proportion by weight of th e hard blocks S in the block copolymer A constituting 65 to 90% by weight; b ) 5 to 25% by weight of a block copolymer B, which contains at least one har d block S of vinyl aromatic monomers and one or more copolymer blocks (B/S)B of, in each case, 20 to 60% by weight of vinyl aromatic monomers and 80 to 40% by weight of dienes, the proportion by weight of the hard blocks S in th e block copolymer B constituting 25 to 70% by weight; c) 0 to 70% by weight of a block copolymer C, which is different from A and B, or polystyrene; and d) 0 to 6% by weight of a plasticizer D, the sum of the components A) to D) adding up to 100% by weight, as well as the use for transparent, thermoform ed films or transparent injection-molded articles.

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