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    CHLOROPRENE RUBBER LATEX 2-PACK TYPE ADHESIVE COMPOSITION AND BONDING THEREOF
    4.
    发明专利
    CHLOROPRENE RUBBER LATEX 2-PACK TYPE ADHESIVE COMPOSITION AND BONDING THEREOF 失效

    公开(公告)号：JPH10279908A

    公开(公告)日：1998-10-20

    申请号：JP9054397

    申请日：1997-04-09

    Applicant: TOSOH CORP

    Inventor： WAKAYAMA HISAMASA ,  KARASUDA TOSHINORI ,  YAMAMOTO NORIMASA

    IPC: C09J147/00

    Abstract: PROBLEM TO BE SOLVED: To obtain the subject composition excellent in adhesive physical properties, such as normal and high temperature adhesive force, particularly, initial adhesive strength, by comprising a main agent containing chloroprene rubber latex as the main component, and a specific solidifying agent. SOLUTION: This 2-pack type composition comprises (A) a main agent consisting of (i) chloroprene rubber latex as the main component, and as necessary, (ii) a tackifying resin and/or a metallic oxide(s), and (B) a solidifying agent consisting of (iii) 1-50 pts.wt., of a water-soluble metallic salt per 100 pts.wt. of the rubber in the component A (in terms of pure rubber content) and (iv) an aqueous solution containing a cationic surfactant in the weight ratio: the component (iii)/the component (iv) of (10:1)-(1:10). As the component (i), a copolymer, obtained from chloroprene monomer and carboxyl group- containing vinyl monomer by using an emulsifier/dispersant affording latex- stability (e.g. water-soluble salt of alkyl diphenyl ether disulfonic acid), is preferably used.

    PRODUCTION OF SULFUR-MODIFIED CHLOROPRENE POLYMER
    7.
    发明专利
    PRODUCTION OF SULFUR-MODIFIED CHLOROPRENE POLYMER 失效

    公开(公告)号：JPH0762029A

    公开(公告)日：1995-03-07

    申请号：JP21014893

    申请日：1993-08-25

    Applicant: TOSOH CORP

    Inventor： WAKAYAMA HISAMASA

    IPC: C08F36/18 ,  C08F8/00 ,  C08K3/00 ,  C08K3/06 ,  C08K5/36 ,  C08K5/40 ,  C08L11/00

    Abstract: PURPOSE:To produce a polymer excellent in shelf life, flexural strength and thermal aging resistance without forming a nitrosoamine compound having a remarkable mutagenicity by deflocculating a specified ratio of a specified polymer and a specified tetraalkylthiuram disulfide. CONSTITUTION:This polymer is produced by conducting an aqueous emulsion polymerization of chloroprene or a mixture of chloroprene and a monomer copolymerizable therewith, e.g. 1,3-butadiene in the presence of sulfur, adding 0.1 to 3.0wt.% one or more kind of tetraalkylthiuram disulfides having >=8C alkyl group, e.g. tetraoctylthiuram disulfide to 100wt.% the obtained polymer and deflocculating the resultant mixture.

    POLYCHLOROPRENE LATEX FOR ADHESIVE, ITS PRODUCTION AND ADHESIVE COMPOSITION USED THEREFOR
    8.
    发明专利
    POLYCHLOROPRENE LATEX FOR ADHESIVE, ITS PRODUCTION AND ADHESIVE COMPOSITION USED THEREFOR 失效

    公开(公告)号：JPH093423A

    公开(公告)日：1997-01-07

    申请号：JP15438795

    申请日：1995-06-21

    Applicant: TOSOH CORP

    Inventor： TSUTSUMI YOSHITAKA ,  WAKAYAMA HISAMASA ,  OZOE SHINJI

    IPC: C08F2/22 ,  C08F236/18 ,  C09J111/02 ,  C09J121/00 ,  C09J121/02

    Abstract: PURPOSE: To obtain a polychloroprene latex for an adhesive excellent in latex stability and satisfying adhesion physical properties such as adhesion retainability, ordinary temperature adhesive force, high temperature adhesive force, heat resistance and water resistance, especially the ordinary temperature adhesive force, the adhesion retainability and the heat resistance. CONSTITUTION: This polychloroprene latex is produced by emulsion-polymerizing monomers comprising (A) 100 pts.wt. of chloroprene, (B) 1-100 pts.wt. of 2,3- dichlorobutadiene, and if necessary, further (C) a carboxyl group-containing vinylic monomer. When the polymer in the latex is dissolved in chloroform in a concentration of 5%, the solution does not contain insolubles. The emulsion polymerization is performed in the presence of 0.5-10 pts.wt. of an emulsifying and dispersing agent and 0.01-3.0 pts.wt. of a mol.wt.-controlling agent at 0-80 deg.C in a conversion of 60-100%.

    LATEX FOR ADHESIVE AND CHLOROPRENE-BASED ADHESIVE COMPOSITION USING THE SAM
    9.
    发明专利
    LATEX FOR ADHESIVE AND CHLOROPRENE-BASED ADHESIVE COMPOSITION USING THE SAM 失效

    公开(公告)号：JPH0827448A

    公开(公告)日：1996-01-30

    申请号：JP31864494

    申请日：1994-12-21

    Applicant: TOSOH CORP

    Inventor： WAKAYAMA HISAMASA ,  HAYASHI TADASHI ,  HARADA YUKIHIKO

    IPC: C08L33/02 ,  C08L11/02 ,  C09J111/02 ,  C09J121/02 ,  C09J147/00

    Abstract: PURPOSE:To obtain a latex for adhesive comprising a mixture of plural latexes containing specific copolymers having different molecular weight and excellent in ordinary-temperature and high-temperature adhesive force, softening temperature, water resistance and latex stability. CONSTITUTION:This latex for adhesive is a copolymer of a chloroprene monomer and a carboxyl group-containing vinyl monomer and is composed of a mixture of latexes of (A) a copolymer having 200000-500000 weight-average molecular weight of a part soluble in an organic solvent with (B) a copolymer having 500000-800000 weight-average molecular weight of a part soluble in an organic solvent [preferably in (90/10) to (10/90) dried weight ratio of components A/B]. Furthermore, the cloroprene-based adhesive is obtained by blending 10-60 pts.wt. of a tackiness-providing agent such as a phenolic resin with 1-5 pts.wt. of a metal oxide or a metal hydroxide.

    POLYCHLOROPRENE RUBBER AND ITS PRODUCTION AND USE
    10.
    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.

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