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    RUBBER COMPOSITION
    5.
    发明专利
    RUBBER COMPOSITION 失效

    公开(公告)号：JPS62273237A

    公开(公告)日：1987-11-27

    申请号：JP11379286

    申请日：1986-05-20

    Applicant: BRIDGESTONE CORP

    Inventor： OGAWA MASAKI ,  ARAKI SHUNJI

    IPC: C08L23/16 ,  C08K3/04 ,  C08L3/04 ,  C08L7/00 ,  C08L9/00 ,  C08L21/00 ,  C08L23/00 ,  C08L101/00

    Abstract: PURPOSE:To obtain a rubber composition having excellent crack-growth resistance under repeated application of large strain and high cut resistance and abrasion resistance, by compounding an isoprene rubber, a resin composed mainly of methylhexadiene/propylene and a specific carbon black. CONSTITUTION:The objective composition can be produced by compounding (A) >=30pts.wt. of a rubber containing >=30wt% isoprene, (B) 1-15pts.wt. of a resin of formula (R is H or CH3; m is 5-100) and composed mainly of methyl-1,4-hexadiene and propylene and/or ethylene and (C) a carbon black having an iodine adsorption of >=40mg/g and a DBP oil absorption of >=90m$/100g. The amount of then carbon black is 2.5 times the weight of the component B. The component B is a resin of formula wherein >=30%, preferably >=60% of the group R is methyl and m is 5-100 and the number-average molecular weight of the resin is 10,000-100,000. The crystal melting point of the polypropylene segment is >=130 deg.C.

    STYRENE/BUTADIENE COPOLYMER RUBBER
    7.
    发明专利
    STYRENE/BUTADIENE COPOLYMER RUBBER 失效

    公开(公告)号：JPS61293212A

    公开(公告)日：1986-12-24

    申请号：JP10493086

    申请日：1986-05-09

    Applicant: BRIDGESTONE CORP

    Inventor： OGAWA MASAKI ,  IKEGAMI MIKIHIKO

    IPC: C08F36/00 ,  C08F4/00 ,  C08F4/48 ,  C08F8/00 ,  C08F236/00 ,  C08F236/10 ,  C08L9/06 ,  C08L21/00

    Abstract: PURPOSE:The title rubber which can give a pneumatic tire excellent in wet-skid resistance, rolling resistance, breaking resistance, (partial) abrasion resistance and workability, obtained by random-copolymerizing styrene with 1,3-butadiene so that the obtained copolymer may satisfy specified requirements. CONSTITUTION:Styrene and 1,3-butadiene are dissolved in an organic solvent such as cyclohexane and random-copolymerized in the presence of N2 or the like at a polymerization temperature with amounts of addition of sodium dodecylbenzenesulfonate, ethylene glycol dimethyl ether, n-butyllithium, etc., that the obtained copolymer may satisfy the desired requirements, to obtain the title rubber having a combined styrene content of 10-30wt%, a 1,2-bond content in the butadiene portion of 42-70wt%, a trans-1,4-bond content in that portion >=25wt% and a difference between the trans 1,4-bond content and the cis-1,4-bond content >=8wt%, satisfying the relationships I and II and having a weight-average MW of 35X10 -65X10 , a weight-average MW/number- average MW ratio =2.

    Pneumatic tire having improved durability
    8.
    发明专利
    Pneumatic tire having improved durability 失效
    具有改善耐久性的气动轮胎

    公开(公告)号：JPS61110608A

    公开(公告)日：1986-05-28

    申请号：JP23296484

    申请日：1984-11-05

    Applicant: Bridgestone Corp

    Inventor： OGAWA MASAKI ,  YAHAGI MASAHISA ,  TANAKA TSUTOMU ,  KUDO TAKAFUMI

    IPC: B60C15/06

    CPC classification number: B60C15/06

    Abstract: PURPOSE:To reduce the in-surface shearing stress and improve high-load durability by setting a rubber sheet layer consisting of the rubber compound containing the short fiber having a specific dimention in a specific ratio between a stiffener in the bead part and a side tread rubber. CONSTITUTION:A pneumatic tire has the carcass piles 3 which consist of the rubber-applied cord layres in which a number of cords are arranged in parallel and the both edge parts are turned-over at the bead wire 2 of the bead part 1 and engaged and a stiffener 4 arranged onto the outer surface in the radial direction of the bead wire 2. Further, a chafer 5 which covers the outside part of the carcass ply 3 in the head part 1 is provided. In this case, a reinforcing lyaer 10 which consists of the rubber compound containing at least eight weight parts of the short fiber having an average diameter of 1mum or less and the ratio between the average length L and the average diameter D, i.e., L/D of 8 or more and has a thickness of 0.2-2.0mm is set between a stiffener 4 and a side tread rubber 8.

    Abstract translation: 目的：为了降低表面剪切应力，提高高负载耐久性，将由含有特定尺寸的短纤维的橡胶组合物构成的橡胶层与胎圈部的加强筋之间的比例设定为 橡胶。 构成：充气轮胎具有由橡胶施加的帘线层3构成的胎体帘布3，其中多个绳平行布置，并且两个边缘部分在胎圈部1的胎圈丝2处翻转并接合 以及设置在胎圈丝2的径向的外表面上的加强件4.此外，设置覆盖头部1中的胎体帘布层3的外侧的胎圈包布5。 在这种情况下，由含有至少8重量份的平均直径为1μm以下的短纤维和平均长度L与平均直径D之比即L / D为8以上，并且在加强件4和侧胎面橡胶8之间设置0.2-2.0mm的厚度。

    TYRE
    9.
    发明专利
    TYRE 失效

    公开(公告)号：JPS6038205A

    公开(公告)日：1985-02-27

    申请号：JP14510183

    申请日：1983-08-10

    Applicant: BRIDGESTONE CORP

    Inventor： OGAWA MASAKI ,  SHIOMURA TAKAO

    IPC: B60C1/00 ,  B05D7/02 ,  B29D30/00 ,  B60C11/00 ,  B60C13/00 ,  C08J7/04

    Abstract: PURPOSE:To prevent remarkably an appearance of a tyre from deteriorating by uniformly coating the surface of the tyre in a specified thickness with a silicone oil whose principal constituent is dimethyl siloxiane having a specified volatile loss in quantity and viscosity. CONSTITUTION:A surface of a tyre is uniformly coated in a thickness of 5- 20mum with a silicone oil whose principal constituent is dimethyl siloxiane having a volatile loss in quantity of less than 2% and a viscosity of at least 1,000 centistokes at 25 deg.C. In this case, the surface of the tyre is preferably coated with a W/O-type emulsion in which the silicone oil is, for example, emulsified by an emulsifier. This results in the prevention of deterioration in an appearance of the tyre particularly induced by discoloration due to blooming of an amine-type antioxidant, a paraffinic wax and the like during a storage of the tyre for a long period of time.

    Pneumatic tire wite improved high-speed durability and rolling resistance
    10.
    发明专利
    Pneumatic tire wite improved high-speed durability and rolling resistance 失效
    气动轮胎改进高速耐久性和耐滚动性

    公开(公告)号：JPS5741203A

    公开(公告)日：1982-03-08

    申请号：JP11744280

    申请日：1980-08-26

    Applicant: Bridgestone Corp

    Inventor： OGAWA MASAKI ,  HIRATA YASUSHI ,  IKEGAMI MIKIHIKO

    IPC: C08L23/16 ,  B60C15/06 ,  C08K3/04 ,  C08K3/06 ,  C08K7/00 ,  C08K7/02 ,  C08L1/00 ,  C08L7/00 ,  C08L9/00 ,  C08L21/00 ,  C08L23/00 ,  C08L23/02 ,  C08L23/18 ,  C08L23/22 ,  C08L23/26 ,  C08L23/28 ,  C08L27/00 ,  C08L33/00 ,  C08L33/02 ,  C08L101/00

    Abstract: PURPOSE: To improve the high-speed durability and rolling resistance by a method wherein a compound consisting of rubber, carbon black, sulphur and micro organic short fibre is used as bead filler rubber.
    CONSTITUTION: The compound consisting of 40W100 parts of carbon black, 3W15 parts of sulphur and 3W30 parts of micro organic short fibre to 100 parts of rubber such as natural rubber or the like by weight, is used as the bead filler rubber. The property of micro organic short fibre is as follows: the transition temperature of amorphous part to glass is 30°C or below or 120°C or above; the melting point of crystalline part is 160°C or above; the mean length of short fibres is 0.8W30 micrometers; the mean diameter of short fibres is 0.02W0.8 micrometers; and the ratio of length to diameter is 8W400. For example, poly-vinyliden chloride, poly-vinyliden fluoride, poly-p-tert-butyl styrene or the like is used.
    COPYRIGHT: (C)1982,JPO&Japio

    Abstract translation: 目的：通过使用由橡胶，炭黑，硫和微有机短纤维组成的化合物作为珠粒填料橡胶的方法来提高高速耐久性和滚动阻力。 构成：将由40-100份炭黑，3-15份硫和3-30份微有机短纤维组成的化合物与100份橡胶（例如天然橡胶等）重量比组合，用作珠粒 填料橡胶。 微有机短纤维的性质如下：非晶部分与玻璃的转变温度为30℃以下或120℃以上; 结晶部分的熔点为160℃以上; 短纤维的平均长度为0.8-30微米; 短纤维的平均直径为0.02-0.8微米; 长径比为8-400。 例如，使用聚亚乙烯基氯，聚亚乙烯基氟化物，聚对叔丁基苯乙烯等。

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