公开(公告)号：JPS63147610A

公开(公告)日：1988-06-20

申请号：JP29341586

申请日：1986-12-11

Applicant: BRIDGESTONE CORP

Inventor： HASHIMOTO TAKATSUGU ,  TOMITA SEISUKE

IPC: B29C33/02 ,  B29C33/38 ,  B29C33/56 ,  B29C33/60 ,  B29C33/64 ,  B29C35/02 ,  B29D30/00 ,  B29K21/00 ,  B29K105/24 ,  B29L30/00

Abstract: PURPOSE:To contrive to improve the releasability and mechanical strength of a bladder by a method wherein a bladder for vulcanizing, the surface of which is treated by a silicone composition containing a mixture of two polyorganosiloxanes, the degrees of polymerization of which are different from each other, is employed during the forming and vulcanizing of a rubber product. CONSTITUTION:A vulcanizing bladder is treated by silicone surface-treating liquid containing polyorganosiloxane having the mean degree of polymerization of 2,500-6,000, polyorganosiloxane having the mean degree of polymerization of 800-1,600, and, as the case may be, fine silica powder and metal salt of organic acid. For the metal salt of organic acid, zinc, magnesium, manganese, iron, cobalt and tin are empolyed. Further, the usage of the low-molecular weight siloxane is 0.3-3 times as much as that of the high-molecular weight siloxane. The obtained bladder for vulcanization is excellent in releasability, resulting in eliminating the need of releasing agent.

公开(公告)号：JPS6259109A

公开(公告)日：1987-03-14

申请号：JP19737285

申请日：1985-09-06

Applicant: BRIDGESTONE CORP

Inventor： HASHIMOTO TAKATSUGU ,  TOMITA SEISUKE

IPC: B60C11/16

Abstract: PURPOSE:To prevent the breakage of a road surface by installing a rubber elastic body into which water is sealed in liquidtight form at the basic edge part of a spike installed into a treat part, thus reducing the modulus of water in the case when a road surface is not in frozen state and permitting the spike to retreat into the tire. CONSTITUTION:A spike tire is formed by burying a number of shanks (spike) 1 having a flange 2 at the basic edge part into a tread part 6, and a tip 3 is installed at the top edge part of the shank 1. In this case, a rubber elastic body 4 which contains water in liquidtight form is installed onto the edge surface on the basic edge side of the shank 1, namely on the side where the flange 2 is installed. Therefore, when a road surface is not in frozen state, the temperature of the tire becomes over the meling point of water, and the elastic modulus of water is kept sufficiently small, and the shank 1 can freely retreat into the tire by the pressing force in the direction of retreat by the contact with the road surface. Therefore, in this state, the breakage of the road surface due to the tip 3 can be prevented exceedingly efficiently.

公开(公告)号：JPS61195162A

公开(公告)日：1986-08-29

申请号：JP3722285

申请日：1985-02-26

Applicant: BRIDGESTONE CORP

Inventor： HASHIMOTO TAKATSUGU ,  TOMITA SEISUKE

IPC: C08L7/00 ,  C08K3/04 ,  C08L1/00 ,  C08L21/00 ,  C08L23/00 ,  C08L23/16 ,  C08L27/00 ,  C08L33/00 ,  C08L33/02 ,  C08L83/00 ,  C08L83/04 ,  C08L101/00

Abstract: PURPOSE:To obtain the titled article such as rubber hose or rubber joint with high heat and ozone resistance and weatherability by incorporating carbon black in a rubber component comprising organic rubber and specific polyorganosiloxane followed by curing and molding. CONSTITUTION:The objective article can be obtained by incorporating (I) 100pts. wt. of a rubber comprising (A) an organic rubber with a Mooney viscosity 20-150 (e.g., ethylene-propylene are rubber) and (B) a polyorganosiloxane of formula (R and R' are each hydrocarbon substituent; n >=100, pref. >=2,000) with >=6 (pref. 20-50)mol% of the substituents R and R' being such hydrocarbon substituent as to be >=350 (pref. >=700) in the Small's molecular attraction force constant (e.g., phenyl group) and 0.02-20mol% of the substituents being group having C=C bond in a weight ratio (A)/(B)=95/5-0/100 (pref. 80/20-20/80) with (C) 2-200 (pref. 5-100)pts.wt. carbon black with an average particle size

公开(公告)号：JPS61178206A

公开(公告)日：1986-08-09

申请号：JP1967485

申请日：1985-02-04

Applicant: BRIDGESTONE CORP

Inventor： TOMITA SEISUKE ,  HASHIMOTO TAKATSUGU

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

Abstract: PURPOSE:To make improvements in mechanical strength, heat resistance, ozoneproofness, external damage resistance, etc., by forming a tire side part of a pneumatic tire with a rubber composition containing organic rubber and specific polyorganosiloxane. CONSTITUTION:The whole layer (or at least an outer layer in both inner and outer layers), of a tire side part S ranging from an upper part of a bead part 2 in a radial-ply tire for passenger cars to a lower part of a shoulder part 4 via a sidewall part 3, is made up of a rubber composition containing organic rubber A and polyorganosiloxane B and its conpostite ratio is A/B=80/25-5/95. This polyorganosiloxane contains a double bonding hydrocarbon radical, not contains polyorganosiloxane 5-100wt% and a hydrocarbon or more than 20 in a degree of polymerization, and is formed from polyorganosiloxane 95-0wt% containing another bridging radical of more than 20 in the polymerization degree.

公开(公告)号：JPS61175009A

公开(公告)日：1986-08-06

申请号：JP1766485

申请日：1985-01-31

Applicant: BRIDGESTONE CORP

Inventor： HASHIMOTO TAKATSUGU ,  TOMITA SEISUKE

IPC: B29C33/04 ,  B29C33/40 ,  B29C35/04 ,  B29D30/00 ,  B29K21/00 ,  B29K105/24 ,  B29L30/00

Abstract: PURPOSE:To provide excellent removability, mechanical strength, heat resistance, hot water resistance and durability, and to increase the yield, by using a bladder for vulcanization of a rubber composition containing a special butyl rubber and a polyorgano siloxane. CONSTITUTION:A rubber composition for forming a bladder for vulcanization comprises a butyl rubber and a polyorgano siloxane, and the butyl rubber base consists of bromobutyl rubber and a terpolymer of isoprene, isobutylene and a third component having a plurality of C=C double bonds, vulcanizable with a peroxide and partially crosslinked. As the third component use is made of divinyl benzene, butadiene, dicyclopentadiene, etc. The proportion of a butyl rubber and a polyorgano siloxane is 10-90-90/10, and a butyl rubber, a polyorgano siloxane and other additives are cured and molded with a vulcanizing agent. The molded bladder for vulcanization is placed in a molding machine, and a molding material is charged and is heated under pressure.

公开(公告)号：JPS61103948A

公开(公告)日：1986-05-22

申请号：JP22541684

申请日：1984-10-26

Applicant: Bridgestone Corp

Inventor： TOMITA SEISUKE ,  EGASHIRA YOSHINORI ,  HASHIMOTO TAKATSUGU

IPC: C08L7/00 ,  C08K3/04 ,  C08L9/00 ,  C08L21/00

Abstract: PURPOSE: To provide the titled composition having low rolling resistance and heat-generation, and high breakage strength, by compounding a rubber composed mainly of an isoprene-butadiene random copolymer containing cis-1,4-bond with carbon black and a vulcanizing agent.
CONSTITUTION: An isoprene-butadiene random copolymer containing ≥90% cis-1,4 bond, or a mixture of said copolymer and one or more other diene rubbers is used as a stock rubber, and is compounded with carbon black and a vulcanizing agent. The isoprene-butadiene random copolymer is the one having an isoprene-content of 40W95(wt)%, and its amount in the stock rubber is ≥20%. The other diene rubber is natural rubber, polyisoprene rubber or polybutadiene rubber (having a cis-bond content of ≥90%) and its amount in the stock rubber is ≥20%.
COPYRIGHT: (C)1986,JPO&Japio

Abstract translation: 目的：通过将主要由含有顺式-1,4-键的异戊二烯 - 丁二烯无规共聚物与炭黑组成的橡胶与硫化剂混合，提供具有低滚动阻力和发热性，高断裂强度的标题组合物。 构成：使用含有> = 90％顺式-1,4键的异戊二烯 - 丁二烯无规共聚物或所述共聚物与一种或多种其它二烯橡胶的混合物作为原料橡胶，并与炭黑和硫化剂 。 异戊二烯 - 丁二烯无规共聚物是异戊二烯含量为40-95（wt）％的共聚物，其在原料橡胶中的量> 20％。 其他二烯橡胶是天然橡胶，聚异戊二烯橡胶或聚丁二烯橡胶（顺式键含量> 90％），其在原料橡胶中的量> 20％。

公开(公告)号：JPS60181145A

公开(公告)日：1985-09-14

申请号：JP3703384

申请日：1984-02-28

Applicant: BRIDGESTONE CORP

Inventor： HASHIMOTO TAKATSUGU ,  TOMITA SEISUKE

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

Abstract: PURPOSE:To provide a rubber composition capable of preventing the apparent color change of a rubber caused by blooming in the case of compounding a large amount of antioxidant to the rubber, and giving a rubber product having remarkably improved appearance, by compounding a specific dye to a rubber composition containing carbon black. CONSTITUTION:A rubber composition containing carbon black is compounded with 0.006-5pts.(wt.), preferably 0.5-3pts. (based on 100pts. of the polymer in the rubber composition) of a dye having a solubility index of 5.0-12.0, preferably 6.0-10.0, hue of 5GY-10BG-5P, preferably 10G-10BG-10PB in Munsell system, and value of

公开(公告)号：JPS59220344A

公开(公告)日：1984-12-11

申请号：JP9506883

申请日：1983-05-31

Applicant: BRIDGESTONE CORP

Inventor： HASHIMOTO TAKATSUGU ,  SUZUKI AKIRA ,  OOHASHI TAKASHI

IPC: B29C35/00 ,  A63B53/14 ,  A63B60/06 ,  A63B60/14 ,  A63B102/02 ,  A63B102/04 ,  A63B102/16 ,  A63B102/32 ,  B29B15/00 ,  B29C33/00 ,  B29C33/02 ,  B29C33/42 ,  B29C59/00 ,  B29H3/00

Abstract: PURPOSE:To prepare a hardly slipping rubber grip having beautiful matte appearance, by welding metal or ceramic particles to the inner surface of a vulcanization mold to impart a fine embossed pattern to the surface of rubber contacted with the welded coating layer of said mold. CONSTITUTION:A plasma spray film layer comprising metal or ceramic particles each having particle size of 50-150mum is partially or entirely formed to the inner surface of a vulcanization mold for a rubber grip. Subsequently, a predetermined molding material is introduced into the mold to mold a rubber grip under vulcanization to prepare a rubber grip having an embossed pattern corresponding to the surface of the plasma spray coating layer formed to the surface thereof. By this method, a rubber grip having beautiful matte high grade excellent appearance and compatible with a hand as well as hardly slipping when wetted water can be obtained. This grip can be suitable used as the grip of a golf club or a tennis racket, the saddle of a bicycle or a motorcycle and the grips of various tools.

公开(公告)号：JP2008014103A

公开(公告)日：2008-01-24

申请号：JP2006189146

申请日：2006-07-10

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

Inventor： HASHIMOTO TAKATSUGU

IPC: E04F15/16 ,  B29B17/00 ,  E01C5/18 ,  E04F15/10

CPC classification number: Y02W30/62

Abstract: PROBLEM TO BE SOLVED: To improve performance for reducing a burden on the feet in walking by enhancing impact absorbing property without impairing environmental property by the use of other waste in a rubber mat using a waste tire crushed material. SOLUTION: This rubber mat is formed by mixing a crushed material of tire vulcanization bladder which is also a waste material, and a binder in the waste tire crushed material and molding a mixture into plate shape. The amount of waste tire in total 100 pts.wt. of waste tire and bladder is 80 pts.wt. or less, and the amount of binder to 100 pts.wt. of the crushed material of waste tire and bladder is 5-40 pts.wt. COPYRIGHT: (C)2008,JPO&INPIT

Abstract translation: 要解决的问题：通过使用废轮胎破碎材料，通过使用其它废物在橡胶垫中，通过增强冲击吸收性能而不损害环境性能来改善行走中脚部负担的性能。 解决方案：该橡胶垫通过将废轮胎硫化囊的破碎材料和废轮胎破碎材料中的粘合剂混合并将混合物成型为板状而形成。 废轮胎总量达100个百分点 的废轮胎和膀胱是80磅 或更少，并且粘合剂的量为100重量份。 的废旧轮胎和膀胱的破碎材料为5-40重量 版权所有（C）2008，JPO＆INPIT

公开(公告)号：JP2002138102A

公开(公告)日：2002-05-14

申请号：JP2000336498

申请日：2000-11-02

Applicant: BRIDGESTONE CORP

Inventor： IWAFUNE SEIICHIRO ,  TORATANI HIROTOSHI ,  KISHIMA KEN ,  HASHIMOTO TAKATSUGU

IPC: C08J3/20 ,  C08C4/00 ,  C08K5/13 ,  C08K5/18 ,  C08L7/00

Abstract: PROBLEM TO BE SOLVED: To provide a method of producing a TSR-type natural rubber suppressing fission of natural rubber main chain at the masticating to relatively reduce generation of polymer-gel and maintain molecular weight at high level resulting in excellent break resistance and abrasion resistance of rubber after processing. SOLUTION: This method of producing a TSR-type natural rubber comprises addition of a aging inhibitor at the masticating of natural rubber by a pre- breaker.