公开(公告)号：JPS62115045A

公开(公告)日：1987-05-26

申请号：JP25378685

申请日：1985-11-14

Applicant: BRIDGESTONE CORP

Inventor： IWAFUNE SEIICHIRO ,  KONDO HITOSHI

IPC: C08L21/00 ,  C08K5/36 ,  C08K5/37

Abstract: PURPOSE:To provide a rubber compsn. which gives a pneumatic tire having little dependence of tan delta on temp., a high tan delta and excellent grip, by blending a rubber component with a mercapto compd. and a disulfide compd. CONSTITUTION:100pts.wt. rubber component composed of natural and/or synthetic rubber such as polybutadiene rubber is blended with 0.1-10pts.wt. mercapto compd. of formula I [wherein R is (COOH-, alkoxycarbonyl-, N- alkylamido-, N-anilino-amido-or NH2-substd.) 1-18C alkyl, aryl, aralkyl, alkaryl] (e.g., N-stearyl-alpha-mercapto-acetamide) and/or disulfide compd. of formula II [e.g., alpha,alpha'-dithiobis (N-anilinoacetamide)].

公开(公告)号：JPS61268739A

公开(公告)日：1986-11-28

申请号：JP9947485

申请日：1985-05-13

Applicant: BRIDGESTONE CORP

Inventor： IWAFUNE SEIICHIRO ,  KONDO HITOSHI

IPC: C08K3/04 ,  C08L7/00 ,  C08L21/00 ,  C08L91/00

Abstract: PURPOSE:To obtain a rubber composition of improved grip performance at elevated temperatures, suitable for tire tread use, by incorporating a rubber with each specific amount of carbon black and aromatic process oil having specified viscosity. CONSTITUTION:The objective composition can be obtained by incorporating (A) 100pts.wt. of a rubber (e.g., natural rubber, styrene-butadiene copolymer rubber) with (B) 30-180pts.wt. of carbon black and (C) 5-180pts.wt. of an aromatic process oil with a dynamic viscosity at 40 deg.C>=6,000cst and ratio of dynamic viscosity at 40 deg.C to that at 100 deg.C>=90 (esp. >=110).

公开(公告)号：JP2006213751A

公开(公告)日：2006-08-17

申请号：JP2005025162

申请日：2005-02-01

Applicant: Bridgestone Corp ,  株式会社ブリヂストン

Inventor： IWAFUNE SEIICHIRO

IPC: C08C1/15

Abstract: PROBLEM TO BE SOLVED: To provide a natural rubber capable of saving work such as not necessarily requiring a mastication process, also not requiring to perform a viscosity adjustment by using a kneading machine, etc., such as a dry pre-breaker, etc., and without causing unevenness in its mastication quality, and a method for producing the same.
SOLUTION: This natural rubber is obtained by the coagulation treatment of natural rubber latex within 3.0-4.2 pH range by a coagulating acid and the natural rubber obtained by such method has a low molecular weight and not necessarily requires the mastication process, and also is obtained by adding a hydrazine compound or triazole compound as its viscosity stabilizer.
COPYRIGHT: (C)2006,JPO&NCIPI

Abstract translation: 要解决的问题：为了提供能够节省工作的天然橡胶，例如不一定需要咀嚼过程，也不需要使用捏合机等进行粘度调节，例如干式预破碎机 等，并且不会引起其咀嚼质量的不均匀，及其制备方法。 解决方案：该天然橡胶通过凝固酸在3.0-4.2 pH范围内凝结处理天然橡胶胶乳得到，并且通过这种方法获得的天然橡胶具有低分子量并且不一定需要咀嚼过程，并且 也可以通过加入肼化合物或三唑化合物作为其粘度稳定剂而获得。 版权所有（C）2006，JPO＆NCIPI

公开(公告)号：JP2004208601A

公开(公告)日：2004-07-29

申请号：JP2002382050

申请日：2002-12-27

Applicant: Bridgestone Corp ,  Otsuka Chemical Holdings Co Ltd ,  大塚化学ホールディングス株式会社 ,  株式会社ブリヂストン

Inventor： IWAFUNE SEIICHIRO ,  MIYAURA AKIFUMI ,  USUI MAKIO

IPC: A01G1/00 ,  A01C21/00 ,  A01C23/00 ,  A01G7/00

Abstract: PROBLEM TO BE SOLVED: To provide a method for cultivating a plant by which the growth rate of the plant and the yield of the plant are improved, and the elongation of the life in which a product can be harvested is achieved.
SOLUTION: The method for cultivating the plant is carried out by feeding a fertilizer having ≤2 wt.% total nitrogen content in a range of a rooting zone of the plant set in a soil. As a result, the growth rate of a natural rubber tree, and the yield of a latex are improved, and the increase of an amount of a dried rubber in the latex and the elongation of the life in which the product can be harvested are achieved in the cultivation of the natural rubber tree.
COPYRIGHT: (C)2004,JPO&NCIPI

Abstract translation: 待解决的问题：提供一种培养植物生长速率和植物产量提高的植物的方法，并且实现了可以收获产品的寿命的延长。 解决方案：栽培植物的方法是通过在土壤中植物组的生根带的范围内喂养具有≤2重量％的总氮含量的肥料来进行的。 结果，改善了天然橡胶树的生长速度和胶乳的产率，并且实现了胶乳中干燥橡胶的量的增加和可以收获产品的寿命的延长 在天然橡胶树的种植中。 版权所有（C）2004，JPO＆NCIPI

公开(公告)号：JP2003313364A

公开(公告)日：2003-11-06

申请号：JP2002121109

申请日：2002-04-23

Applicant: Bridgestone Corp ,  株式会社ブリヂストン

Inventor： IWAFUNE SEIICHIRO ,  MAEDA HIROMI

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

Abstract: PROBLEM TO BE SOLVED: To provide a rubber component-containing coagulum which is obtained from a natural rubber serum, contains a decreased amount of components (e.g. a scorch-causing component) badly influencing so far, realizes the physical properties of a natural rubber to the maximum, and contains useful components (e.g. an aging preventive component) not taken into the rubber so far; a rubber composition containing the coagulum; and a method for producing the coagulum.
SOLUTION: This rubber composition is prepared by compounding (A) a component comprising at least either a natural rubber or a diene rubber with (B) a rubber component-containing coagulum obtained by subjecting a natural rubber latex to centrifugal separation and drying and coagulating the resultant natural rubber serum.
COPYRIGHT: (C)2004,JPO

Abstract translation: 待解决的问题：为了提供由天然橡胶血清获得的含橡胶成分的凝结物，含有迄今严重影响的成分（例如焦烧成分）量减少，实现了物理性质 天然橡胶，并且包含迄今为止没有进入橡胶的有用组分（例如防老剂） 含有凝结物的橡胶组合物; 以及凝集物的制造方法。 解决方案：该橡胶组合物通过将（A）至少包含天然橡胶或二烯橡胶的组分与（B）含有橡胶组份的凝结物混合而制备，所述组合物通过使天然橡胶胶乳离心分离和干燥获得 并凝结所得天然橡胶血清。 版权所有（C）2004，JPO

公开(公告)号：JP2003313202A

公开(公告)日：2003-11-06

申请号：JP2002121110

申请日：2002-04-23

Applicant: Bridgestone Corp ,  株式会社ブリヂストン

Inventor： IWAFUNE SEIICHIRO ,  MAEDA HIROMI

IPC: C08K5/25 ,  C08C1/00 ,  C08L7/00 ,  C08L9/00

Abstract: PROBLEM TO BE SOLVED: To obtain a rubber composition blended with a rubber component containing a natural rubber mixture (component A) which takes in a useful component contained in the serum liquid (a natural rubber serosity) coming without having been taken in a natural rubber, and to provide a method for manufacturing a rubber component coagulum to become the above natural rubber mixture (component A).
SOLUTION: The rubber composition comprises a blend with a rubber component containing the natural rubber and at least one part of the natural rubber is the natural rubber mixture (component A) and is obtained by coagulating a rubber latex at a temperature of 90°C or higher, thereafter by crumbing and moreover drying.
COPYRIGHT: (C)2004,JPO

Abstract translation: 要解决的问题：为了获得与含有天然橡胶混合物（组分A）的橡胶组分混合的橡胶组合物，其中所述天然橡胶混合物（A组分）含有未被吸入的血清液体中含有的有用成分（天然橡胶浆液） 天然橡胶，并提供一种制造橡胶组分凝结物成为上述天然橡胶混合物（组分A）的方法。 解决方案：橡胶组合物包含与含有天然橡胶的橡胶组分的共混物，并且天然橡胶的至少一部分是天然橡胶混合物（组分A），并且通过在90℃的温度下使橡胶胶乳凝结而获得 ℃以上，然后通过粉碎，进一步干燥。 版权所有（C）2004，JPO

公开(公告)号：JPH04365607A

公开(公告)日：1992-12-17

申请号：JP16751791

申请日：1991-06-13

Applicant: BRIDGESTONE CORP

Inventor： IWAFUNE SEIICHIRO ,  MORIMOTO YOSHIYUKI ,  IWASAKI SHINICHI ,  SATO SUSUMU

IPC: B29D30/06 ,  B29D30/52 ,  B29K21/00 ,  B29K105/04 ,  B29K105/16 ,  B60C1/00 ,  B60C11/00 ,  C08L21/00

Abstract: PURPOSE:To secure the stable on-ice performance over a wide temperature range and the stable ice performance under all the using conditions up to the perfect abrasion, as for a pneumatic tire for a vehicle ranging from small size to large size. CONSTITUTION:The foamed rubber which has independent gas foams having a foaming rate of 3-35% and contains 3-30wt. parts resin which possesses a hardness of ASTM Shore D 40 deg. or more and an average diameter of 10-400mum and forms a polymer allay with rubber or the resin which is conjugation-cross- linked with rubber is used for tread.

公开(公告)号：JPH04365606A

公开(公告)日：1992-12-17

申请号：JP16751691

申请日：1991-06-13

Applicant: BRIDGESTONE CORP

Inventor： IWAFUNE SEIICHIRO ,  MORIMOTO YOSHIYUKI ,  IWASAKI SHINICHI ,  SATO SUSUMU

IPC: B29D30/06 ,  B29D30/52 ,  B29K21/00 ,  B29K105/04 ,  B29K105/16 ,  B60C1/00 ,  B60C11/00 ,  B60C11/14 ,  C08L21/00

Abstract: PURPOSE:To secure the stable on-ice performance over a wide temperature range and the stable ice performance under all the using conditions up to the perfect abrasion, as for a neumatic tire for a vehicle ranging from small size to large size. CONSTITUTION:The foamed rubber which has independent gas foams having a foaming rate of 3-35% and contains 3-30wt. parts inorganic high hardness particles which each possess a Mohs's hardness of 1.5 deg.C or more and has an average particle diameter of 10-400mum and to which the processing for improving the affinity with rubber is applied, for 100wt. parts rubber portion are used for tread.

公开(公告)号：JPH04362403A

公开(公告)日：1992-12-15

申请号：JP16243591

申请日：1991-06-07

Applicant: BRIDGESTONE CORP

Inventor： MORIMOTO YOSHIYUKI ,  YAMAUCHI KOJI ,  IWAFUNE SEIICHIRO

IPC: B60C1/00 ,  B60C11/00 ,  C08L21/00

Abstract: PURPOSE:To obtain a pneumatic tire, as an all-season tire in reality, which secures sufficient control stability, durability and low fuel consumption in summer and provides sufficient drivability and brakability on dry-on-ice roads as well as wet-on-ice roads. CONSTITUTION:Rubber composition that 100 pts.wt. rubber and 5-6 pts.wt. syndiotactic-1,2-polybutadiene resin, which has an average grain size ranging within 10-500mum and a crystal melting point of 110 deg.C or higher, are mixed together is arranged on a tread.

公开(公告)号：JPH01118542A

公开(公告)日：1989-05-11

申请号：JP27533887

申请日：1987-10-30

Applicant: BRIDGESTONE CORP

Inventor： IWATA TOSHIRO ,  IWAFUNE SEIICHIRO

IPC: B29D30/52 ,  B60C11/00 ,  C08J9/04 ,  C08J9/06

Abstract: PURPOSE:To obtain a pneumatic tire giving no deterioration after being used on ice and snow road for a long time and small change in hardness with time, by preparing a foamed rubber layer of a tread contg. a specified rubber component and a highly reinforcing carbon black and having a specified foaming ratio and a specified void diameter distribution. CONSTITUTION:In a pneumatic tire having a tire case and a tread covering a crown part of the case, a foamed rubber layer having a vol. which is at least 10% of the total vol. of the tread is provided on the surface side of the tread and this foamed rubber layer is comprised of a foamed rubber contg. a rubber component contg. 50pts.wt. or more one or more members selected from among natural rubber, polybutadiene rubber and styrene-butadiene copolymer rubber whose glass transition temp. is -45 deg.C or lower, a highly reinforcing carbon black whose N2SA is 90-180m /g and 10pts.wt. or less oil based on 100pts.wt. rubber component. This foamed rubber has closed cells whose foaming ratio is in the range of 0.5-50% and the number of 5-30mu particles is 50% or more of the total number wherein the total number of cells is defined as the number of those cells whose cell diameter is 5mu or larger.