PROCEDE DE PREPARATION D'UN ELASTOMERE DIENIQUE, TEL QU'UN POLYBUTADIENE.
    3.
    发明公开
    PROCEDE DE PREPARATION D'UN ELASTOMERE DIENIQUE, TEL QU'UN POLYBUTADIENE. 有权
    方法用于生产DIEN弹性体聚丁二烯

    公开(公告)号:EP1899389A1

    公开(公告)日:2008-03-19

    申请号:EP06724096.0

    申请日:2006-04-06

    IPC分类号: C08F136/06 C08F4/54

    摘要: The invention concerns a method for preparing a diene elastomer. The invention is applicable in particular for obtaining a polybutadiene with a high proportion of cis-1,4 sequences having both a Mooney viscosity (ML1+4) not less than 40, a polydispersity index less than 2.1 and a reduced cold creep and a polyisoprene. The inventive method includes reacting a catalytic system with at least one conjugated diene monomer, said catalytic system being based on at least: one conjugated diene, one or more rare earth metal salts of an organic phosphoric acid, said salt being suspended in at least one inert and saturated hydrocarbon solvent of aliphatic or alicyclic type, an alkylating agent consisting of an alkylaluminium of formula AIR3 or HAIR2, and a halogen donor belonging to the family of alkylaluminium halides, excluding alkylaluminium sesquihalides. Said method includes offset contacting of the monomer(s) to be polymerized with at least one alkylaluminium compound of formula AIR3 or HAIR2 which is identical or not to the alkylating agent of said catalytic system, said amount being selected based on the characteristics of the polymerization medium and/or polymerization conditions and/or said elastomer to be obtained.

    POLYISOPRENES RAMIFIES DE SYNTHESE ET LEUR PROCEDE D OBTENTION
    5.
    发明公开
    POLYISOPRENES RAMIFIES DE SYNTHESE ET LEUR PROCEDE D OBTENTION 审中-公开
    合成聚异戊二烯支化和方法及其

    公开(公告)号:EP1556425A1

    公开(公告)日:2005-07-27

    申请号:EP03757962.0

    申请日:2003-10-13

    IPC分类号: C08F136/08 C08C19/00

    摘要: The invention relates to synthetic branched polyisoprenes having a macrostructure and a microstructure which are very similar to those of natural rubber. According to one aspect of the invention, said polyisoprenes have an apparent stress F/S0 which is equal to or greater than 0.4 MPa for an elongation α of 150 % which is applied to a dumb-bell-shaped test piece containing cross-linkable polyisoprene. According to another aspect of the invention, said polyisoprenes satisfy relation (i) Cotan δ = 0.3761. θinh + 0.15, wherein: cotan δ is the cotangent of the loss angle of a sample of the polyisoprene, which is measured at 130° C using a device with the trade name RPA2000, said sample being shear stressed at 10 % of deformation and at a stress frequency of 0.035 Hz; and θinh is the inherent viscosity of the polyisoprene, which is measured in toluene at 25° C and with a 0.1 g/dl concentration of polyisoprene in the toluene.

    SYSTEME CATALYTIQUE POUR PREPARER DES POLYBUTADIENES ET PROCEDE DE PREPARATION
    6.
    发明公开
    SYSTEME CATALYTIQUE POUR PREPARER DES POLYBUTADIENES ET PROCEDE DE PREPARATION 有权
    催化剂体系及其制备方法聚丁二烯

    公开(公告)号:EP1509557A1

    公开(公告)日:2005-03-02

    申请号:EP03727363.8

    申请日:2003-04-25

    IPC分类号: C08F236/04 C08F4/54 C08F36/04

    CPC分类号: C08F36/04 C08F4/545

    摘要: The invention concerns a catalytic system used for preparing polybutadienes by polymerization, a method for preparing said catalytic system and a method for preparing polybutadienes using said catalytic system. The inventive catalytic system is based on at least: a conjugated diene monomer, a salt of one or more rare earth metals of an organic phosphoric acid, said salt being suspended in at least a saturated inert hydrocarbon solvent of aliphatic or alicyclic type, an alkylating agent consisting of an alkylaluminium of formula AIR3 or HalR2, the mol ratio (alkylating agent/ rare earth salt) being greater than 5, and a halogen donor belonging to the family of alkylaluminium halides other than alkylaluminium sesquihalides, and in accordance with the invention, said catalytic system comprises said rare earth metal(s) in a concentration not less than 0.005 mole/l.

    PROCEDE DE PREPARATION D'UN ELASTOMERE DIENIQUE, TEL QU'UN POLYBUTADIENE.
    10.
    发明授权
    PROCEDE DE PREPARATION D'UN ELASTOMERE DIENIQUE, TEL QU'UN POLYBUTADIENE. 有权
    方法用于生产DIEN弹性体聚丁二烯

    公开(公告)号:EP1899389B1

    公开(公告)日:2009-06-17

    申请号:EP06724096.0

    申请日:2006-04-06

    IPC分类号: C08F136/06 C08F4/54

    摘要: The invention concerns a method for preparing a diene elastomer. The invention is applicable in particular for obtaining a polybutadiene with a high proportion of cis-1,4 sequences having both a Mooney viscosity (ML1+4) not less than 40, a polydispersity index less than 2.1 and a reduced cold creep and a polyisoprene. The inventive method includes reacting a catalytic system with at least one conjugated diene monomer, said catalytic system being based on at least: one conjugated diene, one or more rare earth metal salts of an organic phosphoric acid, said salt being suspended in at least one inert and saturated hydrocarbon solvent of aliphatic or alicyclic type, an alkylating agent consisting of an alkylaluminium of formula AIR3 or HAIR2, and a halogen donor belonging to the family of alkylaluminium halides, excluding alkylaluminium sesquihalides. Said method includes offset contacting of the monomer(s) to be polymerized with at least one alkylaluminium compound of formula AIR3 or HAIR2 which is identical or not to the alkylating agent of said catalytic system, said amount being selected based on the characteristics of the polymerization medium and/or polymerization conditions and/or said elastomer to be obtained.