Class / Patent application number | Description | Number of patent applications / Date published |
524575500 | Natural rubber | 42 |
20090036596 | METHOD FOR PRODUCING RUBBER-FILLER COMPOSITE - In a rubber-filler composite, the filler is uniformly finely dispersed, thereby improving low heat build-up, fatigue resistance and processability of a rubber composition. The rubber-filler composite is obtained by irradiating a filler slurry containing a filler such as carbon black or silica with high amplitude ultrasonic waves having amplitude of 80 μm or more to finely disperse the filler in the slurry, and mixing the dispersion-treated filler slurry with a concentrated natural rubber latex while conducting irradiation with high amplitude ultrasonic waves having amplitude of 80 μm or more, followed by coagulating and drying. | 02-05-2009 |
20090221744 | PROCESS FOR PREPARING A HIGH-COHESION PSA - A process is presented for the preparation of a high-cohesion non-thermoplastic pressure-sensitive adhesive (PSA) on the basis of elastomers, in which neither a solvent nor thermoplastic additives are used and yet thermal breakdown during compounding is kept low. This is achieved through the addition of a vaporizable process agent which is introduced into the adhesive after the constituents have been premixed and which undergoes flash vaporization therein, thereby quenching the adhesive. Furthermore, the use of water to cool the adhesive is proposed, and the high-cohesion PSA thus produced, and also a pressure-sensitive adhesive tape with an adhesive of this kind, are presented. | 09-03-2009 |
20090326144 | METHOD FOR PREPARING FRAGRANT POWDER COMPOSITION FOR TIRE - Disclosed are a method for preparing a fragrant powder composition for a tire, a rubber composition for a tire, which includes the prepared fragrant powder composition for a tire, a rubber containing the prepared fragrant powder composition for a tire, and a tire including the rubber which contains the prepared fragrant powder composition for a tire. | 12-31-2009 |
20100113684 | METHOD FOR PRODUCING A RUBBER COMPOSITION - A method for producing a rubber composition, the method including: preparing a modified natural rubber by releasing protein from rubber particles in a natural rubber latex by adding at least one organic compound selected from formaldehyde, paraformaldehyde, formalin, and glyoxal to the above mentioned natural rubber latex and then drying so as to include the released protein therein; and mixing at least one selected from carbon black and silica in this modified natural rubber. Such method reduces viscosity and improves molding processibility of the rubber composition, as well as reducing hysteresis loss. | 05-06-2010 |
20100311898 | METHOD FOR PRODUCING NATURAL RUBBER MASTERBATCH, NATURAL RUBBER MASTERBATCH, RUBBER COMPOSITION, AND TIRE - The present invention is to provide a production method of a natural rubber master batch including a step of mixing a natural rubber latex and an aqueous slurry having carbon black dispersed in water, wherein a mixing amount of the carbon black is from 10 to 100 parts by mass based on 100 parts by mass of a natural rubber component; and the carbon black is satisfied with the relationships expressed by (1) 12012-09-2010 | |
20100317795 | Rubber Composition Having a Very Low Zinc Content - A rubber composition based on at least one diene elastomer, containing less than 2 phr of zinc, phr meaning parts per hundred parts of rubber (elastomer), and based on at least one reinforcing filler and one sulphur-based crosslinking system, comprising a zinc carboxylate of formula: (RCOO) | 12-16-2010 |
20110054116 | RUBBER COMPOSITION AND TIRE - Provided are a rubber composition which is improved in dispersion of silica into a rubber composition and improved in both of a low heat build-up and abrasion resistance and which is suitable as a tire tread member and a tire prepared by using the same. | 03-03-2011 |
20110178235 | RUBBER COMPOSITION FOR INNER LINER AND PNEUMATIC TIRE - The present invention provides a rubber composition for an inner liner, which can achieve both excellent low heat build-up and high flex crack growth resistance while having processability excellent enough to eliminate the need for mastication, and further has good air impermeability, and also provides a pneumatic tire produced using the rubber composition. The present invention relates to a rubber composition for an inner liner, including: a rubber component that contains a modified natural rubber with a phosphorus content of 200 ppm or less, and carbon black and/or a white filler. | 07-21-2011 |
20110184121 | MINIEMULSION POLYMERIZATION TO PREPARE DRAG REDUCERS - A method of producing a polymer latex drag reducer. The method begins by forming an aqueous solution comprising a surfactant, a buffer and water. The method then forms an organic solution comprising a monomer and a co-stabilizer. The aqueous solution and the organic solution are mixed to form an emulsion. The emulsion is then subjecting to a high shear device to produce a miniemulsion, wherein the monomers are broken into small droplets followed by polymerizing the miniemulsion with the addition of an initiator, wherein a nucleation occurs in the small monomer droplets. | 07-28-2011 |
20120065324 | PREPARATION PROCESS OF OIL EXTENDED RUBBER FOR TIRE, OIL EXTENDED RUBBER FOR TIRE, AND RUBBER COMPOSITION AND TIRE USING THE SAME - The present invention provides an oil extended rubber for a tire, which is obtained by a process for preparing an oil extended rubber for a tire, comprising: (a) a step of preparing an oil-in-water type emulsion by emulsifying a vegetable oil having an iodine value of not less than 135 with a surfactant; (b) a step of mixing said emulsion of vegetable oil and a modified natural rubber latex, and then maturing the mixture; and (c) a step of coagulating the mixture obtained in the step (b) to obtain a lump of a rubber. | 03-15-2012 |
20120065325 | RUBBER COMPOSITION AND PNEUMATIC TIRE - Provided are a rubber composition including: a rubber component formed of a diene-based rubber; and a filler, in which when an actual density determined by JIS K6268 method A is represented by dc, and a density and a mass fraction of a component i determined by constituent analysis are represented by di and φi, respectively, dc·Σ(φi/di)≦0.980 satisfies a specific relationship, and hence the rubber composition reduces the weight of a tire without reducing the durability of the tire such as abrasion resistance and achieves a high level of balance between the weight reduction and a reduction in the rolling resistance of the tire, and a pneumatic tire using the composition. | 03-15-2012 |
20120101219 | VULCANIZED RUBBER AND PROCESS FOR MANUFACTURING SAME - A process for manufacturing a vulcanized rubber comprising the first step of kneading S-(3-aminopropyl)thiosulfuric acid and/or a metal salt thereof, a rubber component, a filler and a sulfur component to obtain a kneaded product, and the second step of subjecting the kneaded product obtained in the first step to a heat treatment. | 04-26-2012 |
20120108738 | RUBBER CRAWLER - The present invention provides a rubber crawler with high durability by using the rubber composition, wherein said rubber composition exhibits enhanced adherence between rubber and metal reinforcing material, such as steel cord and the like, particularly adherence after heat aging and under high humidity, without using vulcanizing retarder, such as CTP, which has possibility of generating problems, such as blooming and lowering rubber physical properties after vulcanization; using vulcanization accelerator having the adequate vulcanization retarding effect exerting excellent working ability; lowering rubber scorching as much as possible. The rubber crawler of the present invention comprises a rubber composition as the treatment rubber thereof, which comprises in the amount of 0.1 to 10 parts by weight of sulfenamide-containing vulcanization accelerator, 0.03 to 3 parts by weight of cobalt-containing composition as the equivalent amount of cobalt and 0.3 to 10 parts by weight of sulfur, relative to 100 parts by weight of rubber component. | 05-03-2012 |
20120130010 | RAILCAR SHOCK ABSORBER RUBBER COMPOSITION - Provided is a railcar shock absorber rubber composition that can provide high cured rubber hardness and simultaneously achieve electrical insulating properties and suppression of a decrease in elastic modulus after strain loading, and includes a diene rubber as a main component, hydrous silicic acid or wet silica with a BET specific surface area of 70 to 130 m | 05-24-2012 |
20120264875 | METHOD FOR PREPARING A MASTERBATCH OF NATURAL RUBBER AND SILICA - The invention relates to a method for preparing a silica/natural rubber masterbatch, comprising the following successive steps:
| 10-18-2012 |
20120283380 | RUBBER MIXTURE FOR ELASTIC COUPLING - The invention relates to an elastic coupling comprised of connecting flanges located on the drive input and drive output side as well as comprised of at least one rubber .body arranged between them. The invention proposes that the at least one rubber body contains silicic acid/silica as filler agent as well as dyeing pigments. | 11-08-2012 |
20130053509 | Rubber Composition Comprising A 1,2,4-Triazine - A rubber composition for the manufacture of tires, based on one or more diene elastomers, on one or more reinforcing fillers and on a vulcanization system, characterized in that the said vulcanization system comprises one or more 1,2,4-triazine compounds of formula: | 02-28-2013 |
20130053510 | Rubber composition comprising a Thiadiazole - A rubber composition for the manufacture of tires, based on one or more diene elastomers, on one or more reinforcing fillers and on a vulcanization system, characterized in that the said vulcanization system comprises one or more thiadiazole compounds of formula: | 02-28-2013 |
20130296482 | METHOD OF PRODUCING A RUBBER MIX WITH LARGE-AREA REINFORCING FILLERS - A method of producing rubber mixes, including a step of mixing a reinforcing filler, having a surface area of over 220 m | 11-07-2013 |
20130303686 | NATURAL RUBBER, RUBBER COMPOSITION USING THE SAME, AND TIRE - The natural rubber of the present invention is natural rubber obtained by leaving standing for a prescribed period of time a hydrous coagulum obtained from a natural rubber latex to which a preservative is added and/or from a coagulum of a natural rubber latex to which a preservative is added and drying it. The natural rubber coagulum is inhibited from being changed in a molecular weight even in a standing step (aging) in a high moisture condition, whereby the natural rubber having stable mechanical properties is obtained. An isothiazoline base compound is used for the preservative. Further, a rubber composition containing the natural rubber is prepared, and a tire is produced by using the rubber composition. | 11-14-2013 |
20130303687 | ELASTOMERIC COMPOSITION EXHIBITING VERY GOOD DISPERSION OF THE FILLER IN THE ELASTOMERIC MATRIX - The invention relates to a rubber composition based on at least one diene elastomer, a filler comprising at least carbon black and an inorganic filler with an inorganic filler content of less than or equal to 50 parts by weight per hundred parts of elastomer, phr, and also a crosslinking system, characterized in that the dispersion of the filler in the elastomeric matrix has a Z value of greater than or equal to 80; and also to the process for preparing such a composition. | 11-14-2013 |
20130310512 | RUBBER COMPOSITION AND PNEUMATIC TIRE - The present invention provides a rubber composition that can enhance the fuel economy, wet-grip performance, abrasion resistance, and processability in a balanced manner, and also provides a pneumatic tire using this rubber composition. The present invention relates to a rubber composition that contains a rubber component, silica, and a compound represented by formula (1) below, wherein the rubber component contains, based on 100% by mass of the rubber component, not less than 5% by mass of a conjugated diene polymer containing a constituent unit based on a conjugated diene and a constituent unit represented by formula (I) below, at least one terminal of the polymer being modified with a specific compound; and an amount of the silica is 5 to 150 parts by mass per 100 parts by mass of the rubber component. | 11-21-2013 |
20140045989 | ELASTOMER COMPOSITE AND METHOD FOR PRODUCING IT - A method of producing an elastomer composite. The method includes A) combining a first fluid comprising elastomer latex with a second fluid comprising particulate filler; B) causing the elastomer latex to coagulate, thereby forming masterbatch crumb; C) bringing the masterbatch crumb to a water content of about 1 weight percent to about 20 weight percent, thereby forming a dewatered coagulum; D) removing water from the dewatered coagulum by subjecting the dewatered coagulum to mechanical energy, thereby causing the dewatered coagulum to heat as a result of friction, while allowing the dewatered coagulum to achieve a temperature of about 130° C. to about 190° C., wherein water content is reduced to about 0.5% to about 3% and wherein substantially all of the decrease in water content is accomplished by evaporation, thereby producing a masticated masterbatch; and E) subjecting the masticated masterbatch to at least an additional 0.3 MJ/kg of mechanical energy while further reducing the water content. | 02-13-2014 |
20140155544 | TIRE WITH COMPONENT COMPRISED OF RUBBER COMPOSITION CONTAINING SILICA AND GRAPHENE PLATELET REINFORCEMENT - This invention relates to a rubber composition comprised of diene-based elastomer, precipitated silica and nano-scale exfoliated graphene platelets. A tire is provided having a component comprised of such rubber composition. | 06-05-2014 |
20140200307 | METHOD FOR THE PRODUCTION OF A RUBBER COMPOSITION AT HIGH TEMPERATURE - Method for the production of an initial rubber composition, in the course of which the following steps are carried out in succession:
| 07-17-2014 |
20140316058 | Elastomer Composite with Silica-Containing Filler and Methods to Produce Same - An elastomer composite with silica-containing filler is described, along with methods to make the same. The advantages achieved with the elastomer composite and methods are further described. | 10-23-2014 |
20140350173 | RUBBER COMPOSITION MANUFACTURING METHOD, RUBBER COMPOSITION, AND PNEUMATIC TIRE USING SAME - The present invention provides a method for producing a rubber composition provided by compounding a rubber component (A) comprising at least one selected from natural rubbers and synthetic diene rubbers, a filler containing an inorganic filler (B), a silane coupling agent (C), and at least one vulcanization accelerator (D) selected from specific compounds, wherein the rubber composition is kneaded in a plurality of stages and wherein, in the first stage (X) of kneading, a portion (A′) of the rubber component (A), all or a portion of the inorganic filler (B), all or a portion of the silane coupling agent (C), and all or a portion of the vulcanization accelerator (D) are added and kneaded, and in or after the second stage of kneading, the residual portion (A″) of the rubber component (A) is added and kneaded, and the method for producing a rubber composition enables production of a rubber composition capable of suitably having a low-heat-generation property by further improving the coupling function activity of the silane coupling agent therein. | 11-27-2014 |
20140350174 | METHOD FOR PRODUCING RUBBER COMPOSITION - The present invention relates to a method for producing a rubber composition obtained by compounding a rubber component (A) containing at least one kind selected from natural rubber and synthetic diene rubber, a filler containing an inorganic filler (B), a silane coupling agent (C), and thiourea, the method comprising kneading the rubber composition in plural stages, the rubber component (A), the whole or a part of the inorganic filler (B), the whole or a part of the silane coupling agent (C), and the thiourea being kneaded in the first stage of kneading, and thus provides a method for producing a rubber composition excellent in low-heat-generation property through enhancement of the reactivity between the coupling agent and the rubber component. | 11-27-2014 |
20140364560 | Hydrolysable Silanes And Elastomer Compositions Containing Them - This invention relates to hydrolysable silanes useful in the modification of elastomers, and as coupling agents for diene elastomer compositions containing a filler. In particular the invention relates to novel hydrolysable silanes containing a piperazine ring and an ether or thioether linkage. | 12-11-2014 |
20150291765 | MODIFIED NATURAL RUBBER, PROCESS FOR PRODUCING SAME, RUBBER COMPOSITION FOR TIRE, AND PNEUMATIC TIRE - The present invention provides a modified natural rubber having a good balance of improved fuel economy, heat-aging resistance, processability, and breaking resistance, and a method for producing such a rubber. The present invention also provides a tire rubber composition and a pneumatic tire which are prepared using the modified natural rubber. The present invention relates to a highly purified, modified natural rubber whose pH is adjusted to 2 to 7. | 10-15-2015 |
20150322234 | TIRE COMPRISING A RUBBER COMPOSITION COMPRISING AN EPOXIDE POLYMER CROSSLINKED WITH A POLYCARBOXYLIC ACID - A tire comprises a rubber composition based on at least one polymer comprising epoxide functional groups, at least one reinforcing filler and a system for crosslinking the polymer. The system for crosslinking the polymer comprises a polycarboxylic acid of general formula (I): | 11-12-2015 |
20150337109 | TIRE COMPRISING A RUBBER COMPOSITION COMPRISING AN EPOXIDE ELASTOMER CROSSLINKED WITH A POLYCARBOXYLIC ACID - A tire comprises a rubber composition based on at least one predominant diene elastomer comprising epoxide functional groups, at least one reinforcing filler, and a crosslinking system. The crosslinking system comprises a polycarboxylic acid of general formula (I): | 11-26-2015 |
20150353690 | MODIFIED DIENE POLYMER, METHOD FOR PRODUCING SAME, RUBBER COMPOSITION, AND PNEUMATIC TIRE - A modified diene polymer is obtained by decomposing a diene polymer having a carbon-carbon double bond in a main chain by oxidative cleavage of the carbon-carbon double bond to reduce a molecular weight, changing acido-basic properties of a system containing polymer fragments obtained such that the system is changed into a basic system when the system is acidic and the system is changed into an acidic system when the system is basic to combine the polymer fragments, thereby obtaining an intermediate polymer having an altered structure, and epoxidizing a carbon-carbon double bond moiety of a main chain of the intermediate polymer. | 12-10-2015 |
20150361248 | RUBBER COMPOSITION, AND PNEUMATIC TIRE USING SAME - The invention provides a rubber composition prepared by mixing, per 100 parts by mass of a rubber component comprising at least 50% by mass of a diene-based rubber, from 20 to 150 parts by mass of a filler, and from 0.05 to 30 parts by mass of a compound A which has a specific guanidine structure and has a functional group reactive with the diene-based rubber. The rubber composition improves both a high elastic modulus and a low tan δ. The invention also provides a pneumatic tire using the rubber composition. | 12-17-2015 |
20150376434 | Bioprocessing of Harvested Plant Materials for Extraction of Biopolymers and Related Materials and Methods - Methods are provided for rapid and efficient removal and separation of leaves and bark from harvested plant material for use in extraction and purification of plant products, and in particular, the removal of leaves and bark from Guayule for the extraction of latex for use in latex and rubber products. | 12-31-2015 |
20160002433 | Rubber Composition for Tire for Heavy Loads, and Pneumatic Tire - A rubber composition for a tire for heavy loads of the present technology comprises: diene rubber containing at least 60% by mass of natural rubber; silica; carbon black; and a silane coupling agent. The silane coupling agent is polysiloxane represented by a specific average compositional formula. The content of the silica is from 5 to 50 parts by mass per 100 parts by mass of the diene rubber. The content of the carbon black is from 5 to 40 parts by mass per 100 parts by mass of the diene rubber. The total content of the silica and the carbon black (R) is from 30 to 70 parts by mass per 100 parts by mass of the diene rubber. The content of the silane coupling agent is from 2 to 20% by mass of the silica content. | 01-07-2016 |
20160009875 | METHOD FOR PRODUCING MODIFIED POLYMER, AND RUBBER COMPOSITION | 01-14-2016 |
20160009877 | METHOD FOR MANUFACTURING RUBBER COMPOSITION, RUBBER COMPOSITION, VULCANIZED RUBBER, AND TIRE | 01-14-2016 |
20160108201 | INTERNAL MIXTURE FOR A TIRE HAVING IMPROVED CRACKING RESISTANCE - A tire comprises at least one internal rubber composition having improved cracking resistance, the said internal composition comprising at least 50 to 100 phr of an isoprene elastomer such as natural rubber; optionally, 0 to 50 phr of another diene elastomer such as BR or SBR; 0 to less than 15 phr of a carbon black; between 40 and 100 phr of a nanoscale inorganic filler such as silica. The internal composition is free from or comprises less than 2%, expressed relative to the weight of the nanoscale inorganic filler of (elastomer/inorganic filler) coupling agent. | 04-21-2016 |
20160130418 | TIRE COMPRISING A RUBBER COMPOSITION COMPRISING AN OLEFINIC EPOXIDE ELASTOMER CROSS-LINKED BY A POLYCARBOXYLIC ACID - A tire comprises a rubber composition based on at least one olefinic elastomer comprising epoxide functional groups as predominant elastomer, at least one reinforcing filler, and a crosslinking system comprising a polycarboxylic acid of general formula (I): | 05-12-2016 |
20160185934 | IMPROVED NATURAL RUBBER COMPOSITIONS - There is herein described improved natural rubber compositions for use in engineered rubber products for use in civil and mechanical engineering applications having nanocarbon and carbon black as reinforcing agents wherein the nanocarbon is uniformly pre-dispersed within the rubber component. In particular there is described rubber compositions comprising a mixture of natural rubber, nanocarbon and carbon black wherein the relative amount in parts per hundred rubber (pphr) of nanocarbon to carbon black is in the range of about 1:40 to about 1:2 and the relative amount in parts per hundred rubber (pphr) of nanocarbon to natural rubber is in the range of about 1:100 to about 10:100 and wherein the nanocarbon component is pre-dispersed within the natural rubber component. | 06-30-2016 |
20190144639 | TIRE WITH COMPONENT COMPRISING CURED RUBBER COMPOSITION HAVING HIGH DIELECTRIC CONSTANT AND RELATED METHODS | 05-16-2019 |