PROCEDE DE PREPARATION DE COPOLYMERES A BLOCS POUR COMPOSITIONS DE BANDE DE ROULEMENT DE PNEUMATIQUE
    4.
    发明公开
    PROCEDE DE PREPARATION DE COPOLYMERES A BLOCS POUR COMPOSITIONS DE BANDE DE ROULEMENT DE PNEUMATIQUE 审中-公开
    用于生产嵌段共聚物胎面组合物

    公开(公告)号:EP1448647A2

    公开(公告)日:2004-08-25

    申请号:EP02783065.2

    申请日:2002-10-31

    摘要: The invention relates to: a method of preparing a two-block copolymer which can be used in a sulphur-crosslinkable rubber composition having reduced hysterises in the crosslinked state; one such block copolymer in which one of the blocks comprises a polyisoprene and the other block comprises a diene elastomer other than polyisoprene; and said rubber composition which is intended for tyre treads. The inventive method of preparing said copolymer consists in copolymerising one or more monomers comprising a conjugated diene other than isoprene using a catalytic system containing: at least one hydrocarbon solvent; a compound A of a metal from group IIIA; a compound B of an alkaline-earth metal; and a polymer initiator C comprising a bond C-Li which is formed by a monolithiated polyisoprene that is intended to form said polyisoprene block, the number-average molecular weight Mn1 of said polyisoprene block having a value of between 2 500 and 20 000 g/mol. In this way, said method can be used to obtain the aforementioned copolymer in which the other block comprising the diene elastomer has a number-average molecular weight Mn2 of between 65 000 and 350 000 g/mol and a 1,4-trans chaining content that is equal to or greater than 70 %.

    ELASTOMÈRE DIÉNIQUE À BLOC POUR DES COMPOSITIONS DE CAOUTCHOUC UTILISABLES POUR DES PNEUMATIQUES
    10.
    发明公开
    ELASTOMÈRE DIÉNIQUE À BLOC POUR DES COMPOSITIONS DE CAOUTCHOUC UTILISABLES POUR DES PNEUMATIQUES 有权
    BLOCKDIENELASTOMERFÜRKAUTSCHUKZUSAMMENSETZUNGEN ZUR VERWENDUNGFÜRLUFTREIFEN

    公开(公告)号:EP2643358A1

    公开(公告)日:2013-10-02

    申请号:EP11788125.0

    申请日:2011-11-23

    摘要: The invention relates to a block diene elastomer having the following formula: (I) where: n and m are each integers greater than or equal to 0, such that n+m≥1 and n+m ≤20; each block A consists of a polybutadiene; each block B consists of a diene elastomer, the molar level of units derived from conjugate dienes of which is greater than 15%, the blocks B being identical to one another; X is an organic or inorganic group, which can contain a function interacting with a reinforcing filler; the number-average molecular weight Mn1 of each Block A varies from 2500 to 20,000 g/mol; the number-average molecular weight Mn2 of each block B varies from 80,000 to 350,000 g/mol; and the chaining rate 1,2 in each block A is comprised between 1 and 20%.

    摘要翻译: 本发明涉及对应于下式的嵌段二烯弹性体:其中:n和m各自为大于或等于0的整数,使得n +m≥1和n + m≦̸ 20,每个A嵌段组成 的聚丁二烯,每个B嵌段由二烯弹性体组成,由共轭二烯衍生的单元的摩尔含量大于15%,B嵌段彼此相同,X是可以包含有机或无机基团 与增强填料相互作用的官能团,每个A嵌段的数均分子量Mn1为2500〜20000g / mol,每个B嵌段的数均分子量Mn2为80000〜350000 g / mol,每个A嵌段中1,2-键的含量为1〜20%。