中科微点-全球专利检索

  1. Login
  2. Sign Up

Search Results

27 records (took 0.025 seconds)

    1.
    发明专利
    未知

    公开(公告)号：DE3890400C2

    公开(公告)日：1994-02-10

    申请号：DE3890400

    申请日：1988-05-18

    Applicant: BRIDGESTONE CORP

    Inventor： ITOH MICHIO ,  YAMAMOTO HISAO ,  OKAMURA NOBUYUKI

    IPC: B60C1/00 ,  C08K5/13 ,  B60C11/00 ,  C08K3/04 ,  C08K5/01 ,  C08L7/00 ,  C08L9/00

    Abstract: A pneumatic tire for high-speed running, which has a greatly improved grip of road surface without serious reduction in heat resistance, particularly blow-out resistance and abrasion resistance, and which is characterized by using a tread made from a rubber composition prepared by incorporating 2.5 to 20.0 parts by weight of a phenolic compound having at least one t-butyl group in 2- or 6-position and a sum of 85 to 200 parts by weight of carbon black having a nitrogen adsorption specific surface area of 110 to 190 m /g and a dibutyl phthalate absorbtion of 100 to 140 ml/100 g and a softening agent, per 100 parts by weight of a synthetic rubber or blend of a synthetic rubber and a natural rubber.

    LARGE-SIZE PNEUMATIC RADIAL TIRE IN CONSTRUCTION USE
    5.
    发明专利
    LARGE-SIZE PNEUMATIC RADIAL TIRE IN CONSTRUCTION USE 失效

    公开(公告)号：JPH0732815A

    公开(公告)日：1995-02-03

    申请号：JP16895793

    申请日：1993-07-08

    Applicant: BRIDGESTONE CORP

    Inventor： NAKAJIMA ICHIRO ,  YAMAMOTO HISAO

    IPC: B60C1/00 ,  B60C9/18 ,  B60C9/22 ,  C08K3/00 ,  C08K3/04 ,  C08K3/06 ,  C08L21/00

    Abstract: PURPOSE:To provide a significantly longer marginal life for a tire by improving cut separation resistance without degrading heat separation resistance. CONSTITUTION:A large pneumatic radial tire in construction use comprises a protecting layer 6 formed of belt coating rubber with a destruction elongation rate of 400-550% to cover a master layer 5 with five or more layers of belt structures 4. The belt coating rubber is composed of 3.0-7.0phr sulfur and 20-70phr carbon black with a nitrogen adsorption specific surface area of 100-150m /g and a dibutyl phthalate oil absorption amount of 70-120ml/100g.

    PNEUMATIC RADIAL TIRE
    6.
    发明专利
    PNEUMATIC RADIAL TIRE 失效

    公开(公告)号：JPH0692108A

    公开(公告)日：1994-04-05

    申请号：JP26915592

    申请日：1992-09-14

    Applicant: BRIDGESTONE CORP

    Inventor： YAMAMOTO HISAO ,  ARAKI SHUNJI

    IPC: B60C9/20

    Abstract: PURPOSE:To substantially improve durability of a tire itself by suppressing generation and growth of separation in a belt end part of a pneumatic radial tire. CONSTITUTION:A pneumatic radial tire has a carcass 2 of striding a bead part and at least two adjacent crossing belt main layers 4 of hooping a crown part of this carcass fastened to bury a metal cord. A rubber member, dispersedly compounding 5 to 40 pts.wt. syndiotactic-1,2-polybutadiene of 130 to 170 deg.C melting point with 100mum or less grain size relating to 100 pts.wt. diene rubber, is arranged as a belt undercushion rubber 3 between the carcass 2 and a free end of the innermost belt layer adjacent to the carcass 2.

    PNEUMATIC RADIAL TIRE
    7.
    发明专利
    PNEUMATIC RADIAL TIRE 失效

    公开(公告)号：JPH04100702A

    公开(公告)日：1992-04-02

    申请号：JP21619290

    申请日：1990-08-16

    Applicant: BRIDGESTONE CORP

    Inventor： YAMAMOTO HISAO

    IPC: B60C9/18 ,  B60C9/20

    Abstract: PURPOSE:To improve durability to the cut-separation attributable to an external damage by positioning the boudary surface of two kinds of covering rubbers for covering metallic cords in the inside than the cord outer peripheral contact surface, and also in the outside than the central surface passing through the center between the cord central surface and the cord outer-peripheral contact surface. CONSTITUTION:The belt layers 4 of a radial tire are reinforced by metallic cords 7, and in at least two layers out of the belt layers 4, the metallic cords 7 are crossed each other with the equatorial surface between. At least the outermost layer out of the belt layers 4 is covered with a covering rubber A and a covering rubber B, and the boundary surface of the covering rubber A and the covering rubber B is positioned in the cord outer peripheral contact surface connecting the outer peripheries of the metallic cords 7 in the radial direction of the tire or in the inner side than this, and also is positioned in the central surface passing through the center between the cord central surface that passes the centers of the sections of respective metallic cords and the outer peripheral contact surface of the cords or in the outer side than this. And the JIS spring type hardness HA of the covering rubber A and the JIS spring type hardness HB of the covering rubber B are set so as to satisfy the following expression, 1.0

    WEATHERABLE IMPROVED RUBBER COMPOSITION
    8.
    发明专利
    WEATHERABLE IMPROVED RUBBER COMPOSITION 失效

    公开(公告)号：JPS6390545A

    公开(公告)日：1988-04-21

    申请号：JP23450686

    申请日：1986-10-03

    Applicant: BRIDGESTONE CORP

    Inventor： SAITO TADASHI ,  YAMAMOTO HISAO

    IPC: C08K5/18 ,  C08K5/17 ,  C08L7/00 ,  C08L9/00

    Abstract: PURPOSE:To obtain the titled rubber composition suitable for tire side-wall section, by incorporating a raw material rubber with each specific p- phenylenediamine derivative and methacrylic acid p-phenylenediamine derivative in specified proportions. CONSTITUTION:The objective rubber composition can be obtained by incorporating (A) 100pts.wt. of a raw material rubber made up of at least one kind of diene rubber selected from natural rubber and synthetic rubbers (e.g., styrene- butadiene rubber, polybutadiene rubber) with (B) at least one kind of p- phenylenediamine derivative of formula I (R1 is cyclohexyl, etc.; R2 is 3-15C alkyl) and (C) at least one kind of methacrylic acid p-phenylenediamine derivative of formula II (R is 4-10C functional group so that the weight ratio B/C falls between 0.1 and 8 (pref. 0.5), the amounts of the components B and C totaling 0.5-5pts.wt.

    PNEUMATIC RADIAL TIRE FOR HEAVY LOAD
    9.
    发明专利
    PNEUMATIC RADIAL TIRE FOR HEAVY LOAD 失效

    公开(公告)号：JPH1076822A

    公开(公告)日：1998-03-24

    申请号：JP23282596

    申请日：1996-09-03

    Applicant: BRIDGESTONE CORP

    Inventor： YAMAMOTO HISAO ,  NAGAI YUICHI

    IPC: B60C15/00 ,  B60C9/18 ,  B60C13/00 ,  B60C15/06

    Abstract: PROBLEM TO BE SOLVED: To provide a pneumatic tire for heavy load in which the durability is enhanced and lightweight construction is realised by means of improvement of a bead part. SOLUTION: Over the whole circumference of a tire, an elastomer protecting member A is installed between a rubber chafer, side wall rubber, and carcass ply layer while an elastomer layer B is interposed between the member A and the carcass ply layer. The width of elastomer layer B in the tire radial direction is 1/3 thru 2/3 of that of the protecting member A, and the bottom of the elastomer layer B lies at 1/2 thru 2/3 of the height of a rim flange while the top is positioned below the folded-back carcass ply end. Therein the condition 1

    RUBBER COMPOSITION
    10.
    发明专利
    RUBBER COMPOSITION 失效

    公开(公告)号：JPH0551491A

    公开(公告)日：1993-03-02

    申请号：JP23700891

    申请日：1991-08-23

    Applicant: BRIDGESTONE CORP

    Inventor： WATANABE YOICHI ,  KUSAKABE NOBORU ,  YAMAMOTO HISAO ,  NODA YUJI

    IPC: C08K3/04 ,  B60C1/00 ,  C08K3/00 ,  C08K3/36 ,  C08K5/04 ,  C08K5/05 ,  C08K5/09 ,  C08L21/00

    Abstract: PURPOSE:To provide a rubber composition having decreased heat-generation and high thermal aging resistance without lowering the adhesive force between steel cord and rubber and suitable as a covering rubber for steel cord of a tire. CONSTITUTION:The objective composition is produced by compounding (A) 100 pts.wt. of a rubber component composed mainly of a natural rubber or a synthetic natural rubber with (B) 35-50 pts.wt. of carbon black, (C) 3-15 pts.wt. of silica (white carbon), (D) 0.1-3 pts.wt. (preferably 0.2-1.5 pt.wt.) of one or more glycols selected from ethylene glycol, diethylene glycol, triethylene glycol and polyethylene glycol and (E) 0.05-0.8 pts.wt. (preferably 0.2-0.6 pts.wt.) of zinc monomethacrylate or zinc dimethacrylate.

Patent Agency Ranking