公开(公告)号：JPH06270151A

公开(公告)日：1994-09-27

申请号：JP6423893

申请日：1993-03-23

Applicant: BRIDGESTONE CORP

Inventor： SAITO TADASHI

IPC: B29B13/10 ,  B29B17/00 ,  B29B17/04 ,  B29C43/02 ,  B29K21/00 ,  B29K105/26

Abstract: PURPOSE:To obtain a press bonded molded object constituted of waste tire broken rubber pieces. CONSTITUTION:A press bonded molded object is obtained by subjecting a waste tire broken rubber piece aggregate containing 95wt.% or more of waste tire broken rubber pieces having the max. diameter of 3.0-15.0mm to press bonding molding under heating. This molded object has rubbery elasticity and is excellent in mechanical properties. Further, the permanent recycle technique of a waste tire used for a field other than a new tire can be inexpensively established.

公开(公告)号：JPS63245439A

公开(公告)日：1988-10-12

申请号：JP7760187

申请日：1987-04-01

Applicant: BRIDGESTONE CORP

Inventor： SAITO TADASHI ,  MATSUMOTO YOSHIYUKI ,  KIJIMA KEN

IPC: B29D30/40 ,  B32B15/06 ,  C08J5/06

Abstract: PURPOSE:To obtain the title composite having strong adhesiveness, by coating a zinc- or bronze-plated steel wire with a specified rubber composition. CONSTITUTION:A rubber composition is obtained by mixing 100pts.wt. blend rubber comprising natural rubber or both of this rubber and a synthetic diene rubber with 0.5-8pts.wt. straight phenolic resin of the formula, 0.1-0.5pt.wt. hexamethylenetetramine, 0.3-5pts.wt. cobalt salt (e.g., cobalt naphthenate) and 2.5-10pts.wt. sulfur. A steel wire plated with zinc or bronze of an Sn content of 5-15% is coated with said rubber composition.

公开(公告)号：JPS63203333A

公开(公告)日：1988-08-23

申请号：JP3592487

申请日：1987-02-20

Applicant: BRIDGESTONE CORP

Inventor： ITO MICHIO ,  SAITO TADASHI ,  OKAMURA NOBUYUKI ,  YAMAMOTO HISAO ,  ISEDA YUTAKA ,  TAKAGI HIROHIKO

IPC: B32B25/10 ,  C08J5/06 ,  C08J5/10 ,  C08J5/12 ,  C08K5/3415 ,  D02G3/48 ,  D06M13/02 ,  D06M13/11 ,  D06M13/165 ,  D06M13/322 ,  D06M13/35 ,  D06M13/352 ,  D06M15/41 ,  D06M101/00 ,  D06M101/16 ,  D06M101/30 ,  D06M101/34

公开(公告)号：JPS62261511A

公开(公告)日：1987-11-13

申请号：JP10317386

申请日：1986-05-07

Applicant: BRIDGESTONE CORP

Inventor： KATO KENSHIRO ,  GENKON KATSUYUKI ,  SAITO TADASHI ,  KIJIMA KEN ,  ENDO KAZUYUKI

IPC: B60C15/06

Abstract: PURPOSE:To suppress the standing wave and improve durability by specifying the sectional area and 100% elongation modulus of a hard rubber stock for a soft rubber stock and specifying each loss tangent of the both rubber stocks. CONSTITUTION:A stiffener 9 rightly over a bead core 3 is constituted of a triangular hard rubber stock 4 which is surrounded by the plies of a carcass 1 and has an oblique side whose bottom side is attached onto a rubber 7 surrounding the bead core 3 and set along the carcass 1, and a triangular soft rubber stock 5 consisting of one side which is positioned outside in the radial direction of the hard rubber stock 4 and is contiguous to the hard rubber stock 4, other side along the radial axis side carcass, and the rest one side along the turn-over part 8 of the carcass 1. In this case, the hard rubber stock 4 is set so as to have the sectional area in 10-70% and the 100% elongation modulus in 3-6 times for those of the soft rubber stock 5, and each loss tangent of the both rubber stocks 4 and 5 is set 0.25 or less, 0.15 or less.

公开(公告)号：JPH0932255A

公开(公告)日：1997-02-04

申请号：JP18717895

申请日：1995-07-24

Applicant: BRIDGESTONE CORP

Inventor： SAITO TADASHI

IPC: E04F15/04 ,  E04F15/18

Abstract: PROBLEM TO BE SOLVED: To improve sound insulating performance by laminating wood plate materials on both the surface and back face of a porous rubber layer made of a compression molding of crushed rubber and having a specific shape. SOLUTION: Waste tires are mechanically crushed, organic fiber cords and metal cords serving as a reinforcing material are removed, and the crushed rubber having the maximum grain size within the range of 0.3-30mm at 90% or above is compression-molded to mold a porous rubber layer 1. A wood backing material 3 such as a particle board is stuck on the back face of the porous rubber layer 1, and a sound insulating floor material 4 laminated with a wood plate material 2 such as a plywood floor material is molded on the surface of the porous rubber layer 1. A execution cost can be reduced.

公开(公告)号：JPH07127007A

公开(公告)日：1995-05-16

申请号：JP27961093

申请日：1993-11-09

Applicant: BRIDGESTONE CORP

Inventor： SAITO TADASHI

IPC: E01C5/18 ,  B32B25/08

Abstract: PURPOSE:To prevent degradation caused by ozone and heat by bonding a rubber piece aggregate under the application of pressure by a binder formed of natural rubber latex, and covering the road surface side with a coat formed of urethane resin. CONSTITUTION:A waste tire is crushed, and organic fiber pieces and steel cord pieces are removed to form a rubber piece aggregate 1. It is so prepared that 95% or less of the aggregate 1 has the maximum diameter within a range of 1-20mm. Natural rubber latex is dripped on the rubber piece aggregate l and agitated at the same time so as to wet the whole surface of the aggregate l, and moisture in the latex 2 is evaporated to form a thin rubber film on the surface of the aggregate 1. The rubber pieces then come to have tackiness to one another, and in the semi-dry state, the aggregate 1 is compression-molded under the application of pressure of 5-50kg/cm by a pressure cylinder. A water dispersion group urethane polymer is further applied to the road surface side surface of the compact and dried to form a coat of thickness in a range of 0.5-2mm.

公开(公告)号：JPH0724833A

公开(公告)日：1995-01-27

申请号：JP17169793

申请日：1993-07-12

Applicant: BRIDGESTONE CORP

Inventor： SAITO TADASHI

IPC: B29B11/12 ,  B29B17/00 ,  B29B17/04 ,  B29C43/02 ,  B29K21/00 ,  B29K105/06 ,  B29K105/24 ,  B29K105/26

Abstract: PURPOSE:To obtain a rubber piece compressed body at low cost which is environmentally safe by a simple method by compressing a plurality of rubber pieces and a natural rubber latex interposed between the pieces. CONSTITUTION:A suitable amount of natural rubber latex is dropped on an assembly of rubber pieces, an entire surface of the assembly is moistened while agitating, and simultaneously dried. Then, formation of a natural rubber film which is rigidly adhered to the piece on the surface of the piece and adhesion between the pieces are advanced. At this time point, it is filled in a predetermined mold, compression molded, then removed from the mold, the pieces are adhered through a natural rubber film by drying to be left to stand, and hence a rubber piece compressed medium of a predetermined shape can be formed. Thus, a manufacturing method has a low cost and a simple to obtain an environmental safe compression molded medium. Since a natural crosslinking can be employed, a facility, a cost in a factory is not only advantageous, but also the crosslinking can be executed at a job site, and hence it can be applied to a wire utility.

公开(公告)号：JPH0356544A

公开(公告)日：1991-03-12

申请号：JP19064189

申请日：1989-07-25

Applicant: BRIDGESTONE CORP

Inventor： WADA ICHIRO ,  YANAMI JIYOUJI ,  SAITO TADASHI

IPC: B60C1/00 ,  C08K5/34 ,  C08K5/3415 ,  C08K5/36 ,  C08K5/40 ,  C08K5/45 ,  C08K5/47 ,  C08L7/00 ,  C08L9/06 ,  C08L21/00 ,  C08L91/00

Abstract: PURPOSE:To obtain a composition having extremely improved heat resistance steeply accelerating crosslinking by mixing bismaleimide derivative and specific vulcanization accelerator into rubber component containing SBR or NR, etc. CONSTITUTION:(A) 100 pts.wt. rubber component composed of single styrenebutadiene copolymer rubber (SBR) or a mixture of said rubber with natural rubber and BR in an amount of SBR/(NR+BR)=70/30 is mixed with (B) 70-170 pts. wt. carbon black, (C) 50-270 pts.wt. aromatic oil, (D) 0.2-5 pts.wt. bismaleimide derivative crosslinking agent, (E) 0.3-2 pts. wt. N-cyclohexy1-2- benzothiazolyl sulfenamide and (F) 0.1-1.5 pts.wt. tetramethylthiuram disulfide and/or dibenzothiazyl disulfide, preferably in a ratio of the component E/the component D as 0.3-1 to afford the aimed composition.

公开(公告)号：JPH0331339A

公开(公告)日：1991-02-12

申请号：JP16527689

申请日：1989-06-29

Applicant: BRIDGESTONE CORP

Inventor： SAITO TADASHI ,  YANAMI JIYOUJI ,  WADA ICHIRO ,  TAKIZAWA TOSHIKI

IPC: B60C1/00 ,  C08C19/02 ,  C08C19/12 ,  C08F8/20 ,  C08K3/04 ,  C08K5/17 ,  C08L9/00 ,  C08L15/02 ,  C08L21/00 ,  C08L91/00

Abstract: PURPOSE:To provide the subject composition having excellent heat resistance, wear resistance and high temperature breakage strength even when carbon black is compounded in a large amount, by combining a halogen-modified styrene-butadiene copolymer with a diamine. CONSTITUTION:(A) 100 pts. of raw material rubber comprising (i) 60-100 pts.wt. of a p-halomethylbenzoyl group of the formula (X is halogen atom) and (ii) 40-0 pts.wt. of any other conjugated diene polymer is compounded wit(B) 70-190 pts. of carbon black, (C) 50-285 pts. of a process oil and (D) 0.3-10 pts. of a diamine of formula: H2N-R-NH2 (R is

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.