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    1.
    发明专利
    未知

    公开(公告)号：DE69620275T2

    公开(公告)日：2002-10-31

    申请号：DE69620275

    申请日：1996-01-31

    Applicant: TOSOH CORP

    Inventor： TSUTSUMI YOSHITAKA ,  YAMAMOTO TAKASHI ,  HIRONAKA TAKESHI ,  HAYASHI TADASHI

    IPC: C08F2/20 ,  C08F2/24 ,  C08F2/26 ,  C08F36/18

    Abstract: A chloroprene rubber having a shade of white only slightly tinged with pale yellow and exhibiting good tackiness is prepared by an aqueous radical emulsion polymerization of chloroprene or a mixture comprised of chloroprene and a copolymerizable monomer, wherein the polymerization is effected by using an alkali metal salt of a disproportioned rosin acid as an emulsifier, and a water-soluble polymeric substance as a dispersion stabilizer which has a sulfonic acid group and/or sulfate ester groups, which group has been introduced by an addition polymerization procedure or by a procedure of a polymeric reaction following an addition polymerization.

    2.
    发明专利
    未知

    公开(公告)号：DE69620275D1

    公开(公告)日：2002-05-08

    申请号：DE69620275

    申请日：1996-01-31

    Applicant: TOSOH CORP

    Inventor： TSUTSUMI YOSHITAKA ,  YAMAMOTO TAKASHI ,  HIRONAKA TAKESHI ,  HAYASHI TADASHI

    IPC: C08F2/20 ,  C08F2/24 ,  C08F2/26 ,  C08F36/18

    Abstract: A chloroprene rubber having a shade of white only slightly tinged with pale yellow and exhibiting good tackiness is prepared by an aqueous radical emulsion polymerization of chloroprene or a mixture comprised of chloroprene and a copolymerizable monomer, wherein the polymerization is effected by using an alkali metal salt of a disproportioned rosin acid as an emulsifier, and a water-soluble polymeric substance as a dispersion stabilizer which has a sulfonic acid group and/or sulfate ester groups, which group has been introduced by an addition polymerization procedure or by a procedure of a polymeric reaction following an addition polymerization.

    Process for producing chloroprene rubber
    3.
    发明公开
    Process for producing chloroprene rubber 失效
    一种制备氯丁过程

    公开(公告)号：EP0725089A3

    公开(公告)日：1998-07-15

    申请号：EP96300670

    申请日：1996-01-31

    Applicant: TOSOH CORP

    Inventor： TSUTSUMI YOSHITAKA ,  YAMAMOTO TAKASHI ,  HIRONAKA TAKESHI ,  HAYASHI TADASHI

    IPC: C08F2/20 ,  C08F2/24 ,  C08F2/26 ,  C08F36/18

    CPC classification number: C08F36/18 ,  C08F2/26 ,  C08F2/20

    Abstract: A chloroprene rubber having a shade of white only slightly tinged with pale yellow and exhibiting good tackiness is prepared by an aqueous radical emulsion polymerization of chloroprene or a mixture comprised of chloroprene and a copolymerizable monomer, wherein the polymerization is effected by using an alkali metal salt of a disproportioned rosin acid as an emulsifier, and a water-soluble polymeric substance as a dispersion stabilizer which has a sulfonic acid group and/or sulfate ester groups, which group has been introduced by an addition polymerization procedure or by a procedure of a polymeric reaction following an addition polymerization.

    PRODUCTION OF CHLOROPRENE RUBBER
    4.
    发明专利
    PRODUCTION OF CHLOROPRENE RUBBER 失效

    公开(公告)号：JPH08269116A

    公开(公告)日：1996-10-15

    申请号：JP29088395

    申请日：1995-11-09

    Applicant: TOSOH CORP

    Inventor： TSUTSUMI YOSHITAKA ,  YAMAMOTO TAKASHI ,  HIRONAKA TAKESHI ,  HAYASHI TADASHI

    IPC: C08F2/26 ,  C08F2/22 ,  C08F36/18

    Abstract: PURPOSE: To obtain a chloroprene rubber, capable of simultaneously satisfying a light-colored hue of a chloroprene rubber-based adhesive and a tack after the application of the adhesive capable of retaining the tackiness for a long period. CONSTITUTION: A water-soluble polymer containing sulfonate groups and/or sulfuric ester groups introduced thereinto by addition polymerization and/or polymeric reaction after the addition polymerization, together with an alkali metallic salt of disproportionated rosin acid, is used as a dispersant in carrying out the aqueous radical emulsion (co)polymerization of chloroprene or a mixture thereof with monomers copolymerizable therewith.

    POLYCHLOROPRENE RUBBER AND ITS PRODUCTION AND USE
    5.
    发明专利
    POLYCHLOROPRENE RUBBER AND ITS PRODUCTION AND USE 失效

    公开(公告)号：JPH06329728A

    公开(公告)日：1994-11-29

    申请号：JP11562793

    申请日：1993-05-18

    Applicant: TOSOH CORP

    Inventor： WAKAYAMA HISAMASA ,  HIRONAKA TAKESHI

    IPC: C08F2/22 ,  C08F2/24 ,  C08F2/38 ,  C08F36/18 ,  C09J111/00 ,  C09J121/00

    Abstract: PURPOSE:To obtain a polychloroprene rubber which has excellent hue and resistance of hue to heat aging and ultraviolet rays unattainable by a conventional polychloroprene rubber. CONSTITUTION:A polychloprene rubber has a wt.-average mol.wt. of 10,000 or higher and an L value, an a value, and a b value of hue measured by the Lab reflection method of 65 to 75, -0.5 to -3.0, and 5.0 to 8.0 respectively. The rubber after heat aging at 70 deg. for 30 days has an L value, an a value, and a b value of hue measured by the Lab reflection method of 65 to 75, -2.5 to -1.5 and 9.0 to 12.0 respectively. A 5% soln. of the rubber in toluene has a hue expressed by extinction at 440nm of 0.03-0.08 and transparency expressed by extinction at 660nm of 0.01-0.04.

    CHLOROPRENE COPOLYMER, ITS PREPARATION AND ADHESIVE USING THE SAME
    6.
    发明专利
    CHLOROPRENE COPOLYMER, ITS PREPARATION AND ADHESIVE USING THE SAME 失效

    公开(公告)号：JPH09157334A

    公开(公告)日：1997-06-17

    申请号：JP32469895

    申请日：1995-12-13

    Applicant: TOSOH CORP

    Inventor： YAMAMOTO TAKASHI ,  TSUTSUMI YOSHITAKA ,  HIRONAKA TAKESHI ,  HAYASHI TADASHI

    IPC: C08F2/40 ,  C08F2/38 ,  C08F26/00 ,  C08F226/06 ,  C08F236/18 ,  C09J111/00 ,  C09J121/00

    Abstract: PROBLEM TO BE SOLVED: To prepare a chloroprene copolymer having excellent heat discoloration resistance and sunlight discoloration resistance by copolymerizing chloroprene or chloroprene in combination with a monomer copolymerizable with chloroprene and a piperidine compd. having a polymerizable unsatd. hydrocarbon group. SOLUTION: Monomers copolymerizable with chloroprene include an acrylic ester, acrylic acid, styrene, butadiene, and acrylonitrile. They may be used alone or in combination of two or more. The amt. of the monomer used is up to 50 pts.wt. based on 100 pts.wt. in total of chloroprene and the monomer copolymerizable with chloroprene. The piperidine compd. is, e.g. 2,2,6,6- tetramethyl-4-piperidyl methacrylate. The amt. of the piperidine compd. used is not more than 10 pts.wt. based on 100 pts.wt. in total of the monomers. The polymn. is conducted by emulsion polymn. An emulsion as a starting material is copolymerized in the presence of a polyrrm. initiator (e.g. potassium persulfate), and a phenolic antioxidant consisting of C, H, and O alone is used as a polynm. terminator.

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