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    Polymer latex production method
    13.
    发明授权
    Polymer latex production method 有权

    公开(公告)号：US10934399B2

    公开(公告)日：2021-03-02

    申请号：US16071997

    申请日：2017-01-26

    Applicant: ZEON CORPORATION

    Inventor： Hidetake Ishii ,  Junji Kodemura

    IPC: C08J3/07 ,  C08L53/02 ,  B29C41/00 ,  C08J5/02 ,  C08F36/08 ,  C08C1/075 ,  B60C1/00 ,  C08F297/04 ,  C08F6/20 ,  C08J3/05 ,  C08K5/098 ,  B29C41/14

    Abstract: A method for producing a polymer latex, including an emulsification step of emulsifying a polymer solution obtained by dissolution of synthetic polyisoprene and/or a styrene-isoprene-styrene block copolymer having a molecular weight distribution of 1.0 to 2.6 in an organic solvent, in water in the presence of a surfactant, to thereby obtain an emulsified liquid, wherein as the synthetic polyisoprene and/or styrene-isoprene-styrene block copolymer, used are/is synthetic polyisoprene and/or a styrene-isoprene-styrene block copolymer which, when dissolved in an organic solvent to thereby be formed into a polymer solution having a viscosity at a temperature of 60° C. of 20,000 cps, have/has a solid content concentration in the range of 10 to 60% by weight.

    LATEX OF ACID-MODIFIED CONJUGATED DIENE-BASED POLYMER, AND METHOD FOR MANUFACTURING SAME
    14.
    发明申请
    LATEX OF ACID-MODIFIED CONJUGATED DIENE-BASED POLYMER, AND METHOD FOR MANUFACTURING SAME 有权

    公开(公告)号：US20210040246A1

    公开(公告)日：2021-02-11

    申请号：US16975967

    申请日：2019-02-22

    Applicant: ZEON CORPORATION

    Inventor： Yoshitaka SATOH ,  Hidetake ISHII ,  Junji KODEMURA

    IPC: C08F36/08 ,  C08F297/04 ,  C08J5/18 ,  C09J147/00 ,  C09J153/02

    Abstract: A latex of an acid-modified conjugated diene polymer including the acid-modified conjugated diene polymer obtained by modifying a conjugated diene polymer with an acid group-containing compound, in which a content of a structural unit derived from the acid group-containing compound is 0.2 to 0.7 parts by weight with respect to 100 parts by weight of the acid-modified conjugated diene polymer; a content of a water-soluble polymer in the latex is 2 parts by weight or less with respect to 100 parts by weight of the acid-modified conjugated diene polymer; when a solids content of the latex is adjusted to 60 wt %, a viscosity at 25° C. is 800 mPa·s or less; and when the solids content of the latex is adjusted to 50 wt %, the viscosity at 25° C. is 300 mPa·s or less.

    SYNTHETIC POLYISOPRENE LATEX
    18.
    发明申请
    SYNTHETIC POLYISOPRENE LATEX 审中-公开

    公开(公告)号：US20200062873A1

    公开(公告)日：2020-02-27

    申请号：US16346864

    申请日：2017-11-02

    Applicant: ZEON CORPORATION

    Inventor： Junji KODEMURA ,  Shunjin AIHARA ,  Yoshitaka SATOH

    IPC: C08F36/08 ,  C08C2/06 ,  C08C19/00 ,  C08J5/18 ,  C09J5/00 ,  C09J109/10 ,  B65D65/40 ,  B32B7/12 ,  B29C41/00

    Abstract: A synthetic polyisoprene latex containing synthetic polyisoprene, wherein the synthetic polyisoprene constituting the synthetic polyisoprene latex includes a low-molecular weight synthetic isoprene chain having a molecular weight of less than 1,000,000 at a content rate of 10 to 70% by weight and a high-molecular weight synthetic isoprene chain having a molecular weight of 1,000,000 or more at a content rate of 30 to 90% by weight. Also, a method for producing the synthetic polyisoprene latex, wherein the synthetic polyisoprene containing the low-molecular weight synthetic isoprene chain and the high-molecular weight synthetic isoprene chain is obtained by polymerizing a monomer containing isoprene in an organic solvent by use of an organic alkali metal catalyst.

    PROCESS FOR PREPARING CONJUGATED DIENE (CO)POLYMERS IN THE PRESENCE OF A CATALYTIC SYSTEM COMPRISING A PYRIDYL IRON (III) COMPLEX
    19.
    发明申请
    PROCESS FOR PREPARING CONJUGATED DIENE (CO)POLYMERS IN THE PRESENCE OF A CATALYTIC SYSTEM COMPRISING A PYRIDYL IRON (III) COMPLEX 审中-公开

    公开(公告)号：US20190270832A1

    公开(公告)日：2019-09-05

    申请号：US16343716

    申请日：2017-10-20

    Applicant: Versalis S.p.A.

    Inventor： Giovanni RICCI ,  Guido PAMPALONI ,  Anna SOMMAZZI ,  Massimo GUELFI ,  Francesco MASI

    IPC: C08F36/06 ,  C07F15/02 ,  C08F36/08

    Abstract: A process for preparing conjugated diene (co)polymers comprising polymerizing at least one conjugated diene in the presence of a catalytic system comprising: (a) at least one pyridyl iron (III) complex having general formula (I) or (II): wherein: —R1, R2, R3 and R4, identical or different, represent a hydrogen atom; or are selected from linear or branched, optionally halogenated C1-C20, preferably C1-C15, alkyl groups, optionally substituted cycloalkyl groups, optionally substituted aryl groups; —R5 represents a hydrogen atom, or is selected from linear or branched, optionally halogenated C1-C20, preferably C1-C15, alkyl groups, optionally substituted cycloalkyl groups, optionally substituted aryl groups; —X, identical or different, represent a halogen atom such as, for example, chlorine, bromine, iodine; or are selected from linear or branched C1-C20, preferably C1-C15, alkyl groups, —OCOR6 groups or —OR6 groups wherein R6 is selected from linear or branched C1-C20, preferably C1-C15, alkyl groups. —n is 3; (b) at least one co-catalyst selected from organo-aluminum derivatives, preferably from: (b1) aluminum compounds having general formula (III): Al(R7)(R8)(R9) (IIl) wherein R7 represents a hydrogen atom, or is selected from linear or branched C1-C20 alkyl groups, cycloalkyl groups, aryl groups, alkylaryl groups, arylalkyl groups, alkoxy groups; R8 and R9, identical or different, are selected from linear or branched C1-C20 alkyl groups, cycloalkyl groups, aryl groups, alkylaryl groups, arylalkyl groups; (b2) aluminoxanes having general formula (IV): (R10)2—Al—O—[-AI(R11)—O-]m-AI-(R12)2 (IV), wherein R10, R11 and R12, identical or different, represent a hydrogen atom, or a halogen atom such as chlorine, bromine, iodine, fluorine; or are selected from linear or branched C1-C20 alkyl groups, cycloalkyl groups, aryl groups, said groups being optionally substituted with one or more silicon or germanium atoms; and m is an integer ranging from 0 to 1000; (b3) partially hydrolyzed organo-aluminum derivatives; (b4) haloaluminum alkyls having general formula (V) or (VI): AI(R13)p(X′)3-p (V) AI2(R13)q(X′)3-q (VI) wherein p is 1 or 2; q is an integer ranging from 1 to 5; R13, identical or different, are selected from linear or branched C1-C20 alkyl groups; X′ represents a chlorine or bromine atom, preferably chlorine; provided that said co-catalyst (b) is not selected from organo-boron derivatives.

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