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    SOUNDPROOF DAMPING MATERIAL
    3.
    发明专利
    SOUNDPROOF DAMPING MATERIAL 失效

    公开(公告)号：JPH07156169A

    公开(公告)日：1995-06-20

    申请号：JP30412693

    申请日：1993-12-03

    Applicant: BRIDGESTONE CORP

    Inventor： SAITO TADASHI

    IPC: F16F15/08 ,  B29C43/02 ,  B29K21/00 ,  B29K105/26 ,  C09J107/02

    Abstract: PURPOSE:To inexpensively obtain a soundproof damping material by bonding rubber piece aggregate obtained by grinding a waste tire by a binder composed of natural rubber latex. CONSTITUTION:Rubber piece aggregate is obtained by grinding a waste tire so that 95wt.% or more thereof has the max. diameter within the range of 1-20mm. Natural rubber latex is dripped on the rubber piece aggregate to wet the entire surface of the rubber piece aggregate. Subsequently, the wetted rubber piece aggregate is dried to bond a natural rubber film to the surfaces of rubber pieces. This rubber piece aggregate is charged in a mold at a point of time when adhesion is advancing to be bonded under pressure of 50kg/cm to obtain a soundproof damping material wherein many voids A are provided between rubber pieces. This damping material develops the behavior of an air spring by the volumetric change of voids A due to compression and shows effective vibration absorbing properties and is enhanced in its soundproof effect by the voids A. Therefore, a soundproof damping material can inexpensively be produced and shows excellent damping capacity.

    HEAVY-DUTY RADIAL PNEUMATIC TIRE
    4.
    发明专利
    HEAVY-DUTY RADIAL PNEUMATIC TIRE 失效

    公开(公告)号：JPS62265005A

    公开(公告)日：1987-11-17

    申请号：JP10861886

    申请日：1986-05-14

    Applicant: BRIDGESTONE CORP

    Inventor： KATO KENSHIRO ,  SAITO TADASHI ,  KIJIMA KEN ,  TAKAHASHI MASANOBU ,  YAMADA SHIGEKI

    IPC: B60C9/18 ,  B60C11/00

    Abstract: PURPOSE:To improve durability, by specifying a thickness of a base rubber in a direction of normal line of the outermost belt layer in a prescribed area from the center of the maximum width made contact with the ground and specifying property of a base rubber, a cap rubber and a belt covering rubber in the captioned tire for an aircraft or the like. CONSTITUTION:The thickness of a base rubber layer 4 is set to 10-35% of the total thickness of a base rubber layer 4 and a cap rubber layer 5 with respect to lines N2-N4 normal to the belt layer 3 of the outermost layer within the area of 0.35 times-0.525 times of the maximum width W made contact with the ground. A tangent loss at a normal temperature after curing is set at 0.17 or less to the base rubber layer 4, at 0.22 or less to the cap rubber layer 5 and at 0.15 to the rubber covering the belt 3. The 100% modulus of the base rubber layer 4 is set to 60-80% of the cap rubber layer 5 and 40-70% of the belt covering rubber. With this arrangement, durability property at the time of a high speed traveling and overloading is improved.

    PAINT FOR ROAD MARK
    6.
    发明专利
    PAINT FOR ROAD MARK 失效

    公开(公告)号：JPH08104827A

    公开(公告)日：1996-04-23

    申请号：JP24095394

    申请日：1994-10-05

    Applicant: BRIDGESTONE CORP ,  SANWA KOGYO KK

    Inventor： SAITO TADASHI ,  OKUYAMA TORU ,  ISHIZAKI SHINJI ,  MIKAMI MASAHIKO

    IPC: E01F9/518 ,  C09D5/00 ,  E01F9/524 ,  E01F9/576 ,  E01F9/04

    Abstract: PURPOSE: To obtain the subject coating large in slipping friction resistance, namely high in safety even in rainy days or on frozen roads, and useful for road marks by adding powder rubber to a coating in a specific ratio. CONSTITUTION: This coating, preferably a thermally meltable coating, is produced by adding 0.1-10 pts.wt. of powder rubber (preferably having a particle diameter of 0.1-2mm) to 100 pts.wt. of a coating. The powder rubber is preferably produced e.g. by removing organic fibers such as nylon fibers or polyester fibers or steel cords used as a reinforcing material from wasted tires, and subsequently mechanically grinding the left rubber. The coating preferably contains a polyamide resin, etc., as a skeleton resin, tale, etc., as a filler, and glass beads having a diameter of approximately 1mm, etc., as a light-reflecting material.

    TREAD RUBBER COMPOSITION FOR HIGH SPEED TIRE
    7.
    发明专利
    TREAD RUBBER COMPOSITION FOR HIGH SPEED TIRE 失效

    公开(公告)号：JPH0331337A

    公开(公告)日：1991-02-12

    申请号：JP16383289

    申请日：1989-06-28

    Applicant: BRIDGESTONE CORP

    Inventor： WADA ICHIRO ,  SAITO TADASHI ,  YANAMI KENJI

    IPC: B60C1/00 ,  C08K3/04 ,  C08K5/36 ,  C08K5/37 ,  C08K5/40 ,  C08K5/45 ,  C08K5/47 ,  C08L9/06

    Abstract: PURPOSE:To provide the subject composition having a greatly improved heat resistance without losing the good stretchability of the rubber and useful for sports cars, etc., by employing a specific triazine derivative as a crosslinking agent and adjusting the combination and compounding ratio of vulcanization accelerators. CONSTITUTION:The objective composition comprises (A) 100 pts.wt. of one kind or more of rubber selected from styrene.butadiene rubber(SBR), SBR- natural rubber blend rubber containing >=70wt.% of the SBR and SBR-butadiene blend rubber containing >=70wt.% of the SBR, (B) 70-190 pts.wt. of carbon black, (C) 50-400 pts.wt. of a rubber softening agent (D), 0.1-5 pts.wt. of a triazine derivative of the formula having two SH groups and an amino group and a vulcanization accelerator comprising a combination of (E) tetramethylthiuram sulfide and (F) N-cyclohexyl-2-benzothiazolyl sulfide, a combination of the component F and (G) dibenzothiadyl disulfide or a combination of the components E, F and G.

    PNEUMATIC TIRE FOR HEAVY VEHICLE
    8.
    发明专利
    PNEUMATIC TIRE FOR HEAVY VEHICLE 失效

    公开(公告)号：JPS63314252A

    公开(公告)日：1988-12-22

    申请号：JP15031587

    申请日：1987-06-18

    Applicant: BRIDGESTONE CORP

    Inventor： YAMAMOTO HISAO ,  SAITO TADASHI

    IPC: B60C11/00 ,  B60C1/00 ,  C08K3/04 ,  C08K5/34 ,  C08L7/00 ,  C08L9/00

    Abstract: PURPOSE:To obtain the title tire improved in abrasion resistance on a good road and improved also in partial abrasion resistance, by mixing a stock rubber with a specified carbon black, a specified bismaleimide compound and sulfur each in a specified range of amount and specifying the resiliency in a specified range. CONSTITUTION:The title tire wherein tread rubber comprises a rubber composition prepared by mixing 100pts.wt. stock rubber comprising 50-100pts.wt. natural rubber or natural rubber/isobutyrene mixture and 50-0pt.wt. styrene/ butadiene rubber and/or butadiene rubber with 0.5-3pts.wt. bismaleimide compound (A) of the formula (wherein R is a 2-6C alkylene, phenylene, naphthylene or tolylene), 0.5-2pts.wt. sulfur (B) and 40-60pts.wt. carbon black (C) of a nitrogen adsorption specific surface area (N2SA) of 110-150m /g and a compressed dibutyl phthalate absorption (DBP value) of 100-130ml/100g, and the resiliency of a sample of the tread rubber sampled from a vulcanized tire is 48-57%. This tire is improved in abrasion resistance in running on a good road and partial abrasion resistance.

    PNEUMATIC TIRE
    9.
    发明专利
    PNEUMATIC TIRE 失效

    公开(公告)号：JPS63235102A

    公开(公告)日：1988-09-30

    申请号：JP6811587

    申请日：1987-03-24

    Applicant: BRIDGESTONE CORP

    Inventor： GENKON KATSUYUKI ,  SAITO TADASHI ,  KIJIMA KEN

    IPC: B60C9/04 ,  B60C1/00 ,  B60C9/20

    Abstract: PURPOSE:To enhance the low temperature durability of a pneumatic tire reinforced with an organic fabric cord and used in a low temperature environment by applying a tan delta peak temperature of a specific value or less to the covering rubber of the reinforcement cord after vulcanization. CONSTITUTION:A tan delta peak temperature is set to -40 deg.C or below for the covering rubber of an organic fabric cord after vulcanization. For this purpose, a rubber of low glass-transition temperature such as a natural rubber, a synthetic isoprene rubber and a high sheath butadiene rubber is used as rubber material. In some cases, a low temperature plasticizer well compatible with a rubber, for example, dioctyl sebacate is mixed with the rubber material. Also, a softening temperature for the rubber material is taken at -20 deg.C or below. Furthermore, a bismaleimide compound mixed with the covering rubber by an amount, for example, 0.5 to 10 percent by weight causes an increase in resistance against separation. Accordingly, the durability of a tire at a low temperature can be enhanced.

    ELASTIC BODY COMPOSITION
    10.
    发明专利
    ELASTIC BODY COMPOSITION 失效

    公开(公告)号：JPH0977545A

    公开(公告)日：1997-03-25

    申请号：JP23860295

    申请日：1995-09-18

    Applicant: BRIDGESTONE CORP

    Inventor： SAITO TADASHI

    IPC: E01C7/26 ,  C04B26/16 ,  C08K3/00 ,  C08L21/00 ,  F16F15/08

    Abstract: PROBLEM TO BE SOLVED: To obtain an elastic body composition giving soft and warm feeling capable of preventing the generation of noise, vibration or the like by using a base material of vehicle, a floor material or wall material of building as a pavement material for civil engineering work. SOLUTION: This elastic body composition is produced by mixing sand, gravel and a crushed rubber chip 2 and then bonding with a binder. The average max. particle diameter of sand and gravel is controlled to

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