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公开(公告)号：JPH09316256A
公开(公告)日：1997-12-09
申请号：JP15633496
申请日：1996-05-29
Applicant: BRIDGESTONE CORP
Inventor： NAKAMURA TAKASHI
Abstract: PROBLEM TO BE SOLVED: To obtain a rubber composition for inner liner, capable of improving the airtightness in blend system of a halogenated butyl rubber and a diene-based rubber and realizing a compatibility of crack resistance to low temperature with air tightness, and provide a method for producing the rubber composition. SOLUTION: In this rubber composition for inner liners in which a rubber component comprises 5-40 pts.wt. diene-based rubber and 95-60 pts.wt. butylic rubber, carbon black (A) having >=90m /g specific nitrogen absorbing area and >=100cm /100g DBP oil absorption amount and/or a prescribed amount of layered filler is unevenly distributed in a region in which a diene-based rubber exists and carbon black (B) having /g specific nitrogen absorbing area is unevenly distributed in a region in which a butyl-based rubber exists.
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公开(公告)号：JPH1017720A
公开(公告)日：1998-01-20
申请号：JP19138096
申请日：1996-07-01
Applicant: BRIDGESTONE CORP
Inventor： NAKAMURA TAKASHI
Abstract: PROBLEM TO BE SOLVED: To provide a pneumatic tire whose resistance to yielding of bead filter is improved and rolling resistance is reduced by highly establishing the compatibility between increased elasticity and crashworthiness of the bead filler rubber. SOLUTION: In a pneumatic tire in which the bead is equipped with bead filler rubber, the bead filler rubber is composed of 100 pts.wt. of a rubber component comprising natural rubber, synthetic rubber or a mixture thereof, 0.5-25 pts.wt. of a novolak resin softening at 90-150 deg.C, prepared by co-condensation reaction between (A) xylenol, (B) a phenol selected from phenol, cresol or their mixture where the molar ratio (A/B) is 25/75-75/25, and an aldehyde, and 0.5-25 pts.wt. of a compound which gives a methylene group with heat.
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公开(公告)号：JPH11189007A
公开(公告)日：1999-07-13
申请号：JP35819197
申请日：1997-12-25
Applicant: BRIDGESTONE CORP
Inventor： NAKAMURA TAKASHI
Abstract: PROBLEM TO BE SOLVED: To provide high internal pressure keeping property and excellent coldness resistance by unevenly distributing a fluoride having alkyl group, on the rubber surface of a foamed part. SOLUTION: A foamed rubber composition is obtained by kneading a rubber component, foaming agent, fluoride having 1-20 pts.wt. of alkyl group to 100 pts.wt. of rubber component, and other compounding ingredients using a kneading machine such as a roll and a Banbury mixer, and then, heating the kneaded material. The obtained foamed rubber composition is used to produce a pneumatic tire. The fluoride having the alkyl group is low in the surface energy, and when the fluoride is blended in the foamed rubber composition, and foamed, the fluoride is unevenly distributed in the interface between the vapor phase part and the solid state part. That is, an inner liner is of the structure where bubbles whose surface is covered with the fluoride are distributed in the rubber component.
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Patent Agency Ranking
公开(公告)号：JPH10324109A
公开(公告)日：1998-12-08
申请号：JP13489297
申请日：1997-05-26
Applicant: BRIDGESTONE CORP
Inventor： NAKAMURA TAKASHI
Abstract: PROBLEM TO BE SOLVED: To make compatible restraint of air permeation of an inner liner and an improvement of crack resisting tendency of the inner liner by mixing a specific quantity of wax with rubber composition for inner liner, in a pneumatic tire in which the inner liner is arranged on the innermost layer of the tire. SOLUTION: As for an inner liner arranged on the tire innermost layer of a pneumatic tire, 0.5-10 pts.wt. of wax against 100 pts.wt. of rubber content is mixed into the rubber compound for inner liner. By mixing wax with the inner liner in this way, the wax is formed into a crystal film 3 on the surface of the inner liner, it acts to restrain that air (oxygen and nitrogen) dissolves into the inner liner rubber, and it can prevent steel belt coating rubber or the like from oxidation-deteriorating. Further on the place where a crack generates, the wax is bloomed so as to form again a crystal film, and hence crack resistance can be improved.
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公开(公告)号：JPH1081788A
公开(公告)日：1998-03-31
申请号：JP19026497
申请日：1997-07-15
Applicant: BRIDGESTONE CORP
Inventor： NAKAMURA TAKASHI
Abstract: PROBLEM TO BE SOLVED: To obtain the subject tire excellent in adhesiveness between steel cords and a rubber composition, heat aging resistance of the rubber composition and durability by using a rubber composition composed of a rubber component containing a specific vulcanization accelerator as the rubber composition constituting a belt layer. SOLUTION: This is a rubber composition constituting a belt layer of a pneumatic radial tire having a treading surface, a pair of sidewalls and beads, a carcass ply reinforced by cords parallelly arranged in the directions of radius of the tire and a belt layer placed at the outside of the carcass ply in terms of the radius. The rubber composition is composed of 0.2-2 pts.wt. of a vulcanization accelerator of formula I or formula II (R and R are each H, an alkyl or an aryl; R and R cannot be H at the same time) based on 100 pts.wt. of a rubber component.
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公开(公告)号：JP2009078808A
公开(公告)日：2009-04-16
申请号：JP2008293921
申请日：2008-11-17
Applicant: Bridgestone Corp , 株式会社ブリヂストン
Inventor： UCHINO OSAMU , NAKAMURA TAKASHI
IPC: B60C1/00 , B60C9/00 , C08K5/3415 , C08L21/00 , D07B1/06
CPC classification number: B60C9/0007 , B60C1/00 , B60C2009/0021 , C08K5/3415 , D07B1/0666 , D07B2205/3089 , Y10T152/1081 , C08L21/00 , D07B2801/18
Abstract: PROBLEM TO BE SOLVED: To improve durability of a tire by providing a rubber composition improving rubber hardness and preventing degradation of low heat generation properties, adhesion properties to a steel cord and deterioration resistance and by using the steel cord capable of improving the adhesion properties. SOLUTION: In the tire, a rubber-steel cord composite which comprises a rubber composition formed by compounding a rubber component comprising at least one of natural rubber and diene rubber with bismaleimide and the steel cord is used. The rubber composition is formed by compounding 0.1-5 pts.wt. bismaleimide with respect to 100 pts.wt. of the rubber component. The steel cord is a monofilament steel cord comprising one steel filament applied with brass plating or a multifilament steel cord formed by twisting the steel filaments, and the average thickness of the brass plating is set to 0.13-0.30 μm. COPYRIGHT: (C)2009,JPO&INPIT
Abstract translation: 解决问题的方法为了提高轮胎的耐久性，通过提供橡胶组合物，提高橡胶硬度，防止低发热性降低，钢帘线的粘合性和耐劣化性，以及使用能够改善 粘附性能。 解决方案：在轮胎中，使用包含通过将包含天然橡胶和二烯橡胶中的至少一种的橡胶组分与双马来酰亚胺和钢丝绳混合而形成的橡胶组合物的橡胶 - 钢丝帘线复合材料。 橡胶组合物通过混合0.1-5重量份 双马来酰亚胺相对于100重量份 的橡胶组分。 钢丝帘线是单丝钢帘线，包括一根施加有黄铜镀层的钢丝，或通过扭曲钢丝而形成的复丝钢帘线，黄铜镀层的平均厚度设定为0.13-0.30μm。 版权所有（C）2009，JPO＆INPIT
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公开(公告)号：JP2002205506A
公开(公告)日：2002-07-23
申请号：JP2001344035
申请日：2001-11-09
Applicant: BRIDGESTONE CORP
Inventor： UCHINO OSAMU , NAKAMURA TAKASHI
IPC: B60C1/00 , C08K5/3415 , C08L7/00
Abstract: PROBLEM TO BE SOLVED: To improve durability of a tire. SOLUTION: This tire is formed using a complex made of rubber composition having bismaleimide or further trans-polybutadiene, and of a steel cord formed by twisting steel filaments containing a specific amount of Cu, Co, and Ni in a brass plating in a distribution in the specific depth direction.
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公开(公告)号：JP2002088208A
公开(公告)日：2002-03-27
申请号：JP2000053743
申请日：2000-02-29
Applicant: BRIDGESTONE CORP
Inventor： KAWAGUCHI YASUMI , WADA ICHIRO , NAKAMURA TAKASHI
Abstract: PROBLEM TO BE SOLVED: To provide a rubber composition for use in inner liners of pneumatic tires with excellent air permeation resistance and improved processability, and to provide, by using the composition, an pneumatic tire that allows its inner liner to reduce the gauge to a great extent, while preserving the inner pressure preserving characteristics. SOLUTION: A rubber component comprising 40-100 wt.% of a halogenated butyl rubber and
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