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    NATURAL RUBBER AND RUBBER COMPOSITION CONTAINING THE SAME
    5.
    发明公开
    NATURAL RUBBER AND RUBBER COMPOSITION CONTAINING THE SAME 审中-公开
    天然橡胶和橡胶组合物含有这些

    公开(公告)号：EP1593693A4

    公开(公告)日：2008-11-26

    申请号：EP04711037

    申请日：2004-02-13

    Applicant: BRIDGESTONE CORP

    Inventor： MAEDA HIROMI

    IPC: B60C1/00 ,  C08C1/04 ,  C08K3/00 ,  C08L7/00

    CPC classification number: C08C1/04 ,  B60C1/00 ,  C08K3/013 ,  C08L7/00

    Abstract: This invention relates to a natural rubber improving the low heat buildup while maintaining the resistance to thermal aging inherent to the natural rubber as well as a rubber composition, and particularly to a natural rubber being a rubber made from a latex by partly removing protein from a natural rubber latex through a mechanical separation means in which a total nitrogen content in the rubber is more than 0.1% by mass but not more than 0.4% by mass, and a rubber composition comprising the natural rubber and a filler.

    METHOD FOR CONTROLLING VULCANIZATION RATE OF NATURAL RUBBER
    6.
    发明专利
    METHOD FOR CONTROLLING VULCANIZATION RATE OF NATURAL RUBBER 失效

    公开(公告)号：JP2002226504A

    公开(公告)日：2002-08-14

    申请号：JP2001028610

    申请日：2001-02-05

    Applicant: BRIDGESTONE CORP

    Inventor： IWAFUNE SEIICHIRO ,  MAEDA HIROMI ,  TORATANI HIROTOSHI ,  KISHIMA KEN

    IPC: C08K5/25 ,  C08C1/00 ,  C08L7/02

    Abstract: PROBLEM TO BE SOLVED: To provide a method for controlling the vulcanization rate of natural rubber to give a natural rubber having a desired vulcanization rate. SOLUTION: The method for controlling the vulcanization rate of natural rubber comprises the control of the amount of serum of latex in the natural rubber before drying. Preferably, the method contains a step to add a viscosity stabilizing agent and preferably further a step to dry the rubber with a drum drier or a conveyor drier after the addition of the viscosity stabilizing agent.

    SURFACE-PROTECTIVE POLISHING AGENT
    7.
    发明专利
    SURFACE-PROTECTIVE POLISHING AGENT 失效

    公开(公告)号：JPH11302543A

    公开(公告)日：1999-11-02

    申请号：JP11374298

    申请日：1998-04-23

    Applicant: BRIDGESTONE CORP ,  SHINETSU CHEMICAL CO

    Inventor： HASHIMOTO TAKATSUGU ,  MAEDA HIROMI ,  HASEGAWA KOHEI ,  KUWATA SATOSHI

    IPC: C08L83/04 ,  C09D183/04

    Abstract: PROBLEM TO BE SOLVED: To obtain the subject polishing agent capable of protecting the surface of molded products such as of rubber from ultraviolet light and moisture and the like by including a branched-type organopolysiloxane, a specific diorganopolysiloxane and a specific silicone resin and others. SOLUTION: This polishing agent is obtained by including (A) 10-70 wt.% of a silicone mixture comprising (i) 1-90 wt.% of an organopolysiloxane composed of 0.1-10 mol.% of unit of the formula R 3 SiO1/2 (R , R and R are each a 1-20C monovalent organic group; (m) and (n) are each 10-2,000), 0.1-10 mol.% of unit of the formula R SiO3/2 and 80-99.8 mol.% of unit of R 2 SiO2/2 with a viscosity of 0.01-1,000 Pa.s at 25 deg.C, (ii) 5-94 wt.% of a both terminal trisubstituted siloxy group-blocked diorganopolysiloxane of the formula with a viscosity of 0.01-1,000 Pa.s at 25 deg.C and (iii) 5-50 wt.% of an organic solvent- soluble silicone resin containing a total of >=80 mol.% of R3 SiO1/2 unit and SiO4/2 unit in the molar ratio of 0.5-1.5, (B) 1-10 wt.% of a nonionic surfactant, and (C) water.

    RUBBER COMPOSITION AND PNEUMATIC TIRE USING IT
    8.
    发明专利
    RUBBER COMPOSITION AND PNEUMATIC TIRE USING IT 失效

    公开(公告)号：JPH11246706A

    公开(公告)日：1999-09-14

    申请号：JP4815798

    申请日：1998-02-27

    Applicant: BRIDGESTONE CORP

    Inventor： HASHIMOTO TAKATSUGU ,  MOTOFUSA SHINICHI ,  MAEDA HIROMI

    IPC: B60C1/00 ,  C08L7/00 ,  C08L9/00

    Abstract: PROBLEM TO BE SOLVED: To provide a rubber compsn. having excellent static and dynamic ozone resistance over a wide temp. range and to provide a pneumatic tire using it. SOLUTION: A rubber compsn. comprises a blend of 100 pts.wt. of a natural rubber or a diene-based synthetic rubber and 0.1-10 pts.wt. of a hydrocarbon- based wax; said hydrocarbon-based wax has a componential compsn. comprising 30-65 totaled wt.% of a 29-39C nonlinear component and a 28-36C linear component at a componential ratio of the former to the latter of 20-55 wt.%, 7-30 totaled wt.% of 20-25C linear and nonlinear components, 15-35 totaled wt.% of a 38-53C linear component and a 42-51C nonlinear component, and 60 totaled wt.% or less of a 32-46C linear component and a 38-46C nonlinear component. A pneumatic tire uses this rubber compsn. as the outer skin parts material.

    Rubber composition prepared by compounding rubber component-containing coagulum and method for preparing the rubber component-containing coagulum
    9.
    发明专利
    Rubber composition prepared by compounding rubber component-containing coagulum and method for preparing the rubber component-containing coagulum 审中-公开
    通过复合橡胶组分含糖凝胶制备的橡胶组合物和用于制备含橡胶组分的凝胶的方法

    公开(公告)号：JP2003313364A

    公开(公告)日：2003-11-06

    申请号：JP2002121109

    申请日：2002-04-23

    Applicant: Bridgestone Corp ,  株式会社ブリヂストン

    Inventor： IWAFUNE SEIICHIRO ,  MAEDA HIROMI

    IPC: C08L7/00 ,  C08K5/00 ,  C08K5/17 ,  C08L9/00

    Abstract: PROBLEM TO BE SOLVED: To provide a rubber component-containing coagulum which is obtained from a natural rubber serum, contains a decreased amount of components (e.g. a scorch-causing component) badly influencing so far, realizes the physical properties of a natural rubber to the maximum, and contains useful components (e.g. an aging preventive component) not taken into the rubber so far; a rubber composition containing the coagulum; and a method for producing the coagulum.
    SOLUTION: This rubber composition is prepared by compounding (A) a component comprising at least either a natural rubber or a diene rubber with (B) a rubber component-containing coagulum obtained by subjecting a natural rubber latex to centrifugal separation and drying and coagulating the resultant natural rubber serum.
    COPYRIGHT: (C)2004,JPO

    Abstract translation: 待解决的问题：为了提供由天然橡胶血清获得的含橡胶成分的凝结物，含有迄今严重影响的成分（例如焦烧成分）量减少，实现了物理性质 天然橡胶，并且包含迄今为止没有进入橡胶的有用组分（例如防老剂） 含有凝结物的橡胶组合物; 以及凝集物的制造方法。 解决方案：该橡胶组合物通过将（A）至少包含天然橡胶或二烯橡胶的组分与（B）含有橡胶组份的凝结物混合而制备，所述组合物通过使天然橡胶胶乳离心分离和干燥获得 并凝结所得天然橡胶血清。 版权所有（C）2004，JPO

    Rubber composition and method for manufacturing rubber component-containing coagulum
    10.
    发明专利
    Rubber composition and method for manufacturing rubber component-containing coagulum 有权
    橡胶组合物和制造含橡胶组分的凝胶的方法

    公开(公告)号：JP2003313202A

    公开(公告)日：2003-11-06

    申请号：JP2002121110

    申请日：2002-04-23

    Applicant: Bridgestone Corp ,  株式会社ブリヂストン

    Inventor： IWAFUNE SEIICHIRO ,  MAEDA HIROMI

    IPC: C08K5/25 ,  C08C1/00 ,  C08L7/00 ,  C08L9/00

    Abstract: PROBLEM TO BE SOLVED: To obtain a rubber composition blended with a rubber component containing a natural rubber mixture (component A) which takes in a useful component contained in the serum liquid (a natural rubber serosity) coming without having been taken in a natural rubber, and to provide a method for manufacturing a rubber component coagulum to become the above natural rubber mixture (component A).
    SOLUTION: The rubber composition comprises a blend with a rubber component containing the natural rubber and at least one part of the natural rubber is the natural rubber mixture (component A) and is obtained by coagulating a rubber latex at a temperature of 90°C or higher, thereafter by crumbing and moreover drying.
    COPYRIGHT: (C)2004,JPO

    Abstract translation: 要解决的问题：为了获得与含有天然橡胶混合物（组分A）的橡胶组分混合的橡胶组合物，其中所述天然橡胶混合物（A组分）含有未被吸入的血清液体中含有的有用成分（天然橡胶浆液） 天然橡胶，并提供一种制造橡胶组分凝结物成为上述天然橡胶混合物（组分A）的方法。 解决方案：橡胶组合物包含与含有天然橡胶的橡胶组分的共混物，并且天然橡胶的至少一部分是天然橡胶混合物（组分A），并且通过在90℃的温度下使橡胶胶乳凝结而获得 ℃以上，然后通过粉碎，进一步干燥。 版权所有（C）2004，JPO

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