| Patent application number | Description | Published |
|---|
| 20090099325 | POLYMERS FUNCTIONALIZED WITH HETEROCYCLIC NITRILE COMPOUNDS - A method for preparing a functionalized polymer, the method comprising the steps of preparing a reactive polymer and reacting the reactive polymer with a heterocyclic nitrile compound. | 04-16-2009 |
| 20090247695 | PROCESS FOR PRODUCING CONJUGATED DIENE POLYMER, CONJUGATED DIENE POLYMER, AND RUBBER COMPOSITION - A process for simply and inexpensively producing a conjugated diene polymer with a narrow molecular weight distribution and a high cis-bond content at a low cost is provided. The process comprises a polymerization step, wherein a conjugated diene polymer having a cis-1,4-bond content of 98.5 mass % or more and a ratio (Mw/Mn) of the weight average molecular weight (Mw) to the number average molecular weight (Mn) measured by gel permeation chromatography of 2.5 or less is obtained by carrying out a polymerization reaction in conjugated diene compounds using a catalyst composition containing a rare earth element-containing compound or a reaction product of the rare earth element-containing compound with a Lewis base, an aluminoxane and/or organoaluminum compound, and an iodine-containing compound. | 10-01-2009 |
| 20100105827 | METHOD FOR PRODUCING MODIFIED CONJUGATED DIENE POLYMER, MODIFIED CONJUGATED DIENE POLYMER, AND RUBBER COMPOSITION - A method for producing a modified conjugated diene polymer includes a step (A) carrying out a primary modification reaction that reacts a heterocumulene compound having two or more specific functional groups with a conjugated diene polymer having a vinyl content of below 10% and a cis-1,4-bond content of 75% or more and possessing an active end to obtain a primary-modified conjugated diene polymer, and a step (B) carrying out a secondary modification reaction that reacts an active hydrogen-containing compound that includes one or more functional groups selected from the group consisting of an amino group, an imino group, a mercapto group, and a hydroxyl group with the primary-modified conjugated diene polymer to obtain a secondary-modified conjugated diene polymer. The method can produce a modified conjugated diene polymer that exhibits low heat build-up (low fuel consumption) and excellent wear resistance. | 04-29-2010 |
| 20100222502 | PROCESS FOR PRODUCING MODIFIED CONJUGATED DIENE POLYMER, MODIFIED CONJUGATED DIENE POLYMER OBTAINED BY THE PROCESS, AND RUBBER COMPOSITION CONTAINING THE SAME - A process for producing a modified conjugated diene polymer includes subjecting an active terminal of a conjugated diene polymer having a vinyl content of less than 10% and a cis-1,4 bond content of 75% or more to a modification reaction with an alkoxysilane compound, and subjecting the alkoxysilane compound (residue) to a condensation reaction in an aqueous solution at a pH of 9 to 14 and a temperature of 85 to 180° C. in the presence of a condensation accelerator including a compound containing titanium. The modified conjugated diene polymer exhibits low heat build-up and increased reinforcing properties when used for a rubber composition, and exhibits excellent wear resistance, mechanical characteristics, and processability. | 09-02-2010 |
| 20100280217 | POLYMERS FUNCTIONALIZED WITH HETEROCYCLIC NITRILE COMPOUNDS - A method for preparing a functionalized polymer, the method comprising the steps of preparing a reactive polymer and reacting the reactive polymer with a heterocyclic nitrile compound. | 11-04-2010 |
| 20100317794 | METHOD FOR PRODUCING MODIFIED CONJUGATED DIENE POLYMER, MODIFIED CONJUGATED DIENE POLYMER, AND RUBBER COMPOSITION - A method for producing a modified conjugated diene polymer includes carrying out a modification reaction that reacts a modifier that includes a specific compound with a conjugated diene polymer having a cis-1,4-bond content of 98.5% or more and possessing an active end to introduce the modifier into the active end of the conjugated diene polymer to obtain a modified conjugated diene polymer. The modified conjugated diene polymer that exhibits excellent wear resistance, excellent mechanical properties, and reduced cold flow can be obtained by the method. | 12-16-2010 |
| 20110015302 | METHOD FOR PRODUCING MODIFIED CONJUGATED DIENE POLYMER, MODIFIED CONJUGATED DIENE POLYMER, AND RUBBER COMPOSITION - A method for producing a modified conjugated diene polymer includes a modification step (A) that subjects a conjugated diene polymer having a cis-1,4-bond content of 98.5% or more and possessing an active end to a modification reaction to introduce an alkoxysilane compound having two or more reactive groups including an alkoxysilyl group into the active end of the conjugated diene polymer, and a condensation step (B) that subjects the residue of the alkoxysilane compound introduced into the active end to a condensation reaction in the presence of a condensation catalyst that includes at least one element among the elements of the groups 4A, 2B, 3B, 4B, and 5B in the periodic table. The method can produce a modified conjugated diene polymer that exhibits low heat build-up and excellent wear resistance. | 01-20-2011 |
| 20110319519 | RUBBER COMPOSITION AND PNEUMATIC TIRE - A rubber composition from which a vulcanized rubber suitable for producing, for example, a pneumatic tire having excellent abrasion resistance, breaking strength, rolling resistance, wet skid resistance, and the like can be prepared. The rubber composition comprises a rubber component (A) comprising a diene rubber comprising 20 mass % or more of a modified styrene-butadiene copolymer (a1) and 5 mass % or more of a modified conjugated diene polymer (a2), and a filler (B), wherein the modified conjugated diene polymer (a2) is a conjugated diene polymer obtained by modifying the active terminals of a conjugated diene polymer having a cis-1,4 bond content of 80% or higher, with an alkoxysilane compound, and the filler (B) comprises at least either of 2 to 100 mass parts, relative to 100 mass parts of the rubber component (A), of carbon black (b1) and 30 to 100 mass parts, relative to 100 mass parts of the rubber component (A), of silica (b2). | 12-29-2011 |
| 20120270997 | METHOD OF PRODUCING MODIFIED CONJUGATED DIENE RUBBER, MODIFIED CONJUGATED DIENE RUBBER, AND RUBBER COMPOSITION - There is provided a method of producing a conjugated diene rubber capable of being used as a starting material for a crosslinked rubber that can be used in applications such as tire treads and can raise the fuel efficiency. This method of producing a conjugated diene rubber comprises (a) a step of reacting a first alkoxysilane compound having in a molecule at least one group convertible to onium by an onium generator and at least one alkoxysilyl group that has at least two alkoxy groups, with a conjugated diene polymer having an alkali metal or alkaline-earth metal active terminal and obtained by polymerizing a conjugated diene compound and an aromatic vinyl compound, thereby to obtain a modified conjugated diene polymer that has the group convertible to onium and the alkoxysilyl group, and (b) a step of mixing the resulting modified conjugated diene polymer with the onium generator and a second alkoxysilane compound having in a molecule at least one alkoxysilyl group and at least one group convertible to onium by the onium generator. | 10-25-2012 |
| 20130023623 | PROCESS FOR PRODUCTION OF MODIFIED CONJUGATED DIENE RUBBER, MODIFIED CONJUGATED DIENE RUBBER, AND RUBBER COMPOSITION - To provide a producing method of conjugated diene rubber which can be used as a starting material of cross-linked rubber which is used for such as tire tread and can enhance low fuel consumption performance. | 01-24-2013 |
| 20130085228 | MODIFIED CONJUGATED DIENE RUBBER, METHOD FOR PRODUCING SAME, AND RUBBER COMPOSITION - By a method comprising a process including (a) producing a modified conjugated diene polymer through reaction of a conjugated diene polymer having an alkali metal or alkaline-earth metal active terminal with a first alkoxysilane compound which has both an alkoxysilyl group and at least one group convertible into an onium, and (b) mixing the modified conjugated diene polymer, an agent for producing onium, a second alkoxysilane compound having an alkoxysilyl group and at least one group convertible into an onium and a condensation catalyst containing metal element(s) for alkoxysilane compounds, conjugated diene rubber usable as a starting material of cross-linked rubber which is used for a tire tread or the like and allows enhancement of low fuel consumption property can be obtained. | 04-04-2013 |
| 20130245192 | METHOD FOR PRODUCING MODIFIED CONJUGATED DIENE RUBBER, MODIFIED CONJUGATED DIENE RUBBER, AND RUBBER COMPOSITION - This invention relates to a method for producing a modified conjugated diene rubber wherein the method involves: (a) a step in which a conjugated diene polymer having an alkali metal or alkaline earth metal active end and obtained by polymerizing a conjugated diene compound or by polymerizing a conjugated diene compound with an aromatic vinyl compounds is reacted with a first alkoxysilane compound which has an alkoxysilyl group having two or more alkoxy groups and has a group protected by a protecting group wherein deprotection is possible to obtain a modified conjugated-diene polymer having an alkoxysilyl group; and (b) a step in which the modified conjugated-diene polymer is reacted with a second alkoxysilane compound which has an alkoxysilyl group. | 09-19-2013 |
| 20130296481 | MODIFIED CONJUGATED DIENE RUBBER, METHOD FOR PRODUCING SAME, AND RUBBER COMPOSITION - According to a method for producing a modified conjugated diene rubber, the method involves a step of obtaining a modified conjugated diene rubber by reacting a conjugated diene compound or a conjugated diene polymer which is obtained by polymerizing a conjugated diene compound and an aromatic vinyl compound and has an alkali metal or alkaline-earth metal active end, with a first hydrocarbyloxysilane compound having an alkyl polyether group and a group convertible into an onium, and a conjugated diene rubber which can be used as a starting material for a crosslinked rubber that is used in applications such as a tire tread and is capable of improving the low fuel consumption performance is provided. | 11-07-2013 |
| 20140221563 | METHOD FOR PRODUCING DENATURED CONJUGATED DIENE POLYMER - A method for producing a modified conjugated diene polymer usable as a raw material of a crosslinked polymer which is used for use in tires and the like of automobiles and can enhance low fuel consumption performance of automobiles and the like is provided. | 08-07-2014 |
| 20140309363 | METHOD FOR PRODUCING DENATURED CONJUGATED DIENE POLYMER - A method for producing a conjugated diene polymer usable as a raw material of a crosslinked polymer which is used for use in tires of automobiles and can enhance low fuel consumption performance of automobiles is provided. | 10-16-2014 |
