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    PNEUMATIC TIRE
    61.
    发明专利
    PNEUMATIC TIRE 失效

    公开(公告)号：JPH05213008A

    公开(公告)日：1993-08-24

    申请号：JP1760892

    申请日：1992-02-03

    Applicant: BRIDGESTONE CORP

    Inventor： YAMADA YUKIMASA ,  YAGAWA KAZUO ,  HASHIMOTO TAKATSUGU

    IPC: B60C1/00 ,  B60C11/00 ,  B60C11/04

    Abstract: PURPOSE:To effectively/make a pneumatic tire flameproof by minimizing the quantity of a consumed flameproof rubber component without damaging a requested fundamental characteristics such as the wear and abrasion resistance and heat build-up resistance of a tread. CONSTITUTION:The reinforcing part of a pneumatic tire 10 has an one-ply radial carcass 14 reinforced by a steel cord mounting in troidal shape on a pair of bead cores 12 and two layers of belts 16 reinforced by a steel cord on the outside in the radial direction of the radial carcass 14, and moreover a bead reinforced layer 22 along the outside of the turning up part of the radial carcass 14. The tire has an outer skin rubber part formed of a tread rubber layer 30 and a side rubber layer 32 which lies in a row on both the sides of the tread rubber layer 30 and extends toward a radial inside to a spot near a bead part, and the tread part is provided with a groove 34 continuing in a peripheral direction. The inner peripheral face of the groove 34 is arranged provided with a flame proof rubber component layer L whose oxygen index is within a range from 22.0 to 30.0 to a gauge T being 1.0 mm or less.

    METHOD FOR MOLDING AND VULCANIZING RUBBER PRODUCT
    62.
    发明专利
    METHOD FOR MOLDING AND VULCANIZING RUBBER PRODUCT 失效

    公开(公告)号：JPH0531724A

    公开(公告)日：1993-02-09

    申请号：JP21323791

    申请日：1991-07-31

    Applicant: BRIDGESTONE CORP

    Inventor： HASHIMOTO TAKATSUGU ,  MISHIMA HISAMI

    IPC: B29C33/04 ,  B29C33/76 ,  B29C35/04 ,  B29D30/00 ,  B29K21/00 ,  B29K83/00 ,  B29K105/24 ,  B29L30/00

    Abstract: PURPOSE:To mold and vulcanize a rubber product such as a tire with good workability without generating molding inferiority by using vulcanizing bladder excellent in mechanical properties, physical properties such as hot water resistance and chemical properties and having good durability and releasability. CONSTITUTION:In the molding and vulcanization of a rubber product using a vulcanizing bladder, the vulcanizing bladder is formed so as to have a multilayered structure composed of a plurality of layers and has a layer (A) composed of a rubber composition based on org. rubber on the innermost side thereof and a layer (B) composed of a rubber composition whose release stress with the rubber product is 0.5kg/cm or less on the outermost side thereof.

    PNEUMATIC TIRE FOR HEAVY-LOAD VEHICLE
    63.
    发明专利
    PNEUMATIC TIRE FOR HEAVY-LOAD VEHICLE 失效

    公开(公告)号：JPH04279641A

    公开(公告)日：1992-10-05

    申请号：JP35073091

    申请日：1991-12-12

    Applicant: BRIDGESTONE CORP

    Inventor： HASHIMOTO TAKATSUGU ,  WATANABE SHUICHI ,  MAKINO YOSHIHIRO ,  YUNGU DABURIYUU KANGU

    IPC: B60C1/00 ,  C08F4/42 ,  C08F4/48 ,  C08F236/10 ,  C08F297/06 ,  C08K3/04 ,  C08L7/00 ,  C08L9/06 ,  C08L21/00

    Abstract: PURPOSE:To obtain the subject tire, having a tread surface part thereof prepared by including an elastomer mixture containing a specific copolymer composition and natural rubber blended in specified amounts and useful for trucks, buses, etc. CONSTITUTION:The objective tire having at least a tread surface thereof produced from a vulcanizable elastomer composition prepared by blending (A) 100 pts.wt. elastomer mixture composed of (i) 10-90wt.% copolymer composition component (the copolymer has >=100000 average molecular weight) obtained by blending a 1,3-conjugated diene with an aromatic compound using a catalyst composed of a trimetalated 1-alkyne [the alkyne is expressed by the formula (R is alkyl)] prepared by reacting, at >=70 deg.C temperature a >=4C 1-alkyne with an organometallic compound expressed by the formula R M (R is hydrocarbyl ; M is alkaline metal), where the molar ratio of the 1,3-conjugated diene to 1-alkyne is (2:1) to (30:1) and that of the compound expressed by the formula R M to 1-alkyne is 3:1, and (ii) 10-90wt.% natural rubber with (B) 25-150 pts.wt. reinforcing carbon black.

    GRAB FOR PARTS OR THE LIKE
    65.
    发明专利
    GRAB FOR PARTS OR THE LIKE 失效

    公开(公告)号：JPH01301086A

    公开(公告)日：1989-12-05

    申请号：JP12889088

    申请日：1988-05-26

    Applicant: BRIDGESTONE CORP

    Inventor： HASHIMOTO TAKATSUGU ,  WATANABE ISAO ,  SAITOU YOUKOU

    IPC: B25J15/00

    Abstract: PURPOSE:To form an optimum expander easily according to characteristics and applications, etc., of an object to be held as well as to improve the extent of durability in this expander by forming a surface layer at the expansion surface side of a tube, and forming the expander into at least a two-layer structure. CONSTITUTION:A surface layer 4 is formed only in a surface, where a tube 3 is actually expanded, by means of coating, laminating or the like. A desired expander 1 is constituted by a two-layer structure consisting of this tube 3 and the surface layer 4. In a usual service state of this expander 1, a compressive strain acts on the surface layer 4 all the time, so that even if a small flaw is made on the surface, it will not come to a large one at once, thus durability in the expander 1 is improvable.

    RUBBER COMPOSITION
    67.
    发明专利
    RUBBER COMPOSITION 失效

    公开(公告)号：JPS6485240A

    公开(公告)日：1989-03-30

    申请号：JP23998187

    申请日：1987-09-26

    Applicant: BRIDGESTONE CORP

    Inventor： HASHIMOTO TAKATSUGU ,  KOJIMA TAKAHIKO ,  TOMITA SEISUKE

    IPC: C08K5/54 ,  C08K5/00 ,  C08L21/00

    Abstract: PURPOSE:To provide a rubber composition which gives a vulcanizate excellent in tensile strength, modulus, Shore hardness, etc. and is suitable for a tire etc., by adding a specified organosilicon compound and a silanol condensation catalyst to a polymer having a carbon-carbon double bond. CONSTITUTION:A main component comprising a carbon-carbon double bond- containing polymer (A) (e.g., natural rubber or synthetic rubber) is compounded with an organosilicon compound (B) of formula I (wherein X is a hydrolyzable group, R is a linear or branched alkyl, a cycloalkyl, an aralkyl, a halogen or an alkoxyl-substituted alkyl, or a phenyl which may be substituted, Z is a functional group reactive with a carbon-carbon double bond, m>=1 and 0

    PNEUMATIC TIRE
    68.
    发明专利
    PNEUMATIC TIRE 失效

    公开(公告)号：JPS61196802A

    公开(公告)日：1986-09-01

    申请号：JP3722085

    申请日：1985-02-26

    Applicant: BRIDGESTONE CORP

    Inventor： HASHIMOTO TAKATSUGU ,  TOMITA SEISUKE

    IPC: C08L7/00 ,  B60C1/00 ,  B60C13/00 ,  C08K3/04 ,  C08L1/00 ,  C08L21/00 ,  C08L23/00 ,  C08L27/00 ,  C08L33/00 ,  C08L33/02 ,  C08L83/00 ,  C08L83/04 ,  C08L101/00

    Abstract: PURPOSE:To make improvements in antiozonization, heat resistance, anti weatherability, etc., by forming a tire side part with a rubber composite containing specific polyorganosiloxane or this one and organic rubber, and reinforced with carbon black. CONSTITUTION:In case of a radial-ply tire for a passenger car, the whole layer of a tire side part S ranging from an upper part of a bead part 2 to a lower part of a shoulder part 4 via a sidewall part 3 or an outer layer alone, if in case of a structure of both inner and outer layers, is formed with a rubber composite which contains polyorganosiloxane B or organic rubber A and the polyorganosiloxane B and its composite ratio is A/B=95/5-0/100. As one being shown in an expression I, this polyorganosiloxane B should be set that at least more than 6 moles in hydrocarbon substituents R and R' is a hydrocarbon substitution value of more than 350 in a molecular attraction constant of SMALL. In addition, carbon black should be contained in this rubber composite.

    SHAPING AND VULCANIZING PROCESS OF RUBBER PRODUCT
    69.
    发明专利
    SHAPING AND VULCANIZING PROCESS OF RUBBER PRODUCT 失效

    公开(公告)号：JPS61195810A

    公开(公告)日：1986-08-30

    申请号：JP3721985

    申请日：1985-02-26

    Applicant: BRIDGESTONE CORP

    Inventor： HASHIMOTO TAKATSUGU ,  TOMITA SEISUKE

    IPC: B29C33/02 ,  B29C33/40 ,  B29C35/02 ,  B29C43/36 ,  B29D30/00 ,  B29K21/00 ,  B29K105/24 ,  B29L30/00

    Abstract: PURPOSE:To elevate the quality stability of products and the operability in manufacture, improving the hot water resistance and the durability of a vulcanizing bladder by using the vulcanizing bladder shaped with the rubber composition which contains a specified polyorganosiloxane or said siloxane and organic rubber and is reinforced by carbon black. CONSTITUTION:When a rubber product is shaped and vulcanized, organic rubber A and polyorganosiloxane B or polyorganosiloxane B are contained in the vulcanizing bladder to be used, and the composition ratio is set to be in the range of A/B=95/5-0/100. Polyorganosiloxane is shown by a formula 1, and at least 6mol% or more in substituents R, R' is the hydrocarbon substituent whose molecular attraction coefficient of Small is equal to 350 or more, and it is shaped with rubber composition containing carbon black.

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