Patent application number | Description | Published |
20090124742 | Rubber Composition, Method for Producing Same and Tire - The present invention provides a rubber composition containing a rubber component (A) including a modified polymer having a protic amine structure, and an oxidizing agent (B), in which interaction between the rubber component and a carbon black is excellent and dispersibility of the carbon black is improved. This rubber composition enables to obtain a tire that is excellent in low heat generation, rupture property, and abrasion resistance and the like. Also provided are a method of efficiently producing such a rubber composition and a tire having the above-mentioned characteristics which is made of the rubber composition. | 05-14-2009 |
20090292043 | MODIFIED CONJUGATED DIENE COPOLYMER, RUBBER COMPOSITIONS AND TIRES - The present invention provides a modified conjugated diene polymer that is prepared by polymerization of a conjugated diene compound using a catalyst containing a lanthanoid rare earth element compound in an organic solvent and then modifying the resulting polymer having an active organic metal site with a modifier, wherein the modification efficiency is not less than 15% and the cis-1,4 bond content in the conjugated diene moiety measured by Fourier transform infrared spectroscopy satisfies the relationship (I): | 11-26-2009 |
20120059112 | POLYMERS FUNCTIONALIZED WITH NITRILE COMPOUNDS COMTAINING A PROTECTED AMINO GROUP - A method for preparing a functionalized polymer, the method comprising the steps of (i) polymerizing monomer with a coordination catalyst to form a reactive polymer; and (ii) reacting the reactive polymer with a nitrile compound containing a protected amino group. | 03-08-2012 |
20120259056 | COMPOSITIONS AND METHOD FOR PRODUCING POLY-AMINOFUNCTIONALIZED POLYMERIZATION INITIATORS AND CORRESPONDING POLYMERS - Compositions and methods for producing polymerization initiators comprising at least two protected primary amine groups. Polymers prepared using such polymerization initiators can comprise a residue of the polymerization initiator and can initially comprise the at least two protected primary amine groups. Such polymers can undergo a deprotection process thereby yielding a polymer having one or more unprotected primary amine groups. Polymers having primary amine groups can be employed in rubber compositions, which have a variety of potential applications, such as, for example, in tire manufacturing. | 10-11-2012 |
20130085227 | POLYMERS FUNCTIONALIZED WITH NITRILE COMPOUNDS CONTAINING A PROTECTED AMINO GROUP - A method for preparing a functionalized polymer, the method comprising the steps of polymerizing monomer with a coordination catalyst to form a reactive polymer and reacting the reactive polymer with a nitrile compound containing a protected amino group. | 04-04-2013 |
20130331480 | RUBBER COMPOSITION AND TIRE PRODUCED USING SAME, AND PROCESS OF PRODUCING RUBBER COMPOSITION - Rubber composition containing at least 10 parts by mass, in 100 parts by mass of a rubber component, of a polymer component (B) containing a residue of an organic acid (A) added in a production process of the polymer, and containing from 10 to 150 parts by mass of a reinforcing filler (C), and 6 parts by mass or less in total of the residue of an organic acid (A) and an organic acid (D) used on mixing, per 100 parts by mass of the rubber component, thereby providing a rubber composition and a tire produced by using the composition, by defining the total amount of an acidic component with respect to the total mixed rubber, including an organic acid, such as stearic acid, and an organic acid contained in a residue of an emulsifier added in a production process of emulsion-polymerized SBR. | 12-12-2013 |
20140288250 | PROCESS FOR PREPARATION OF CYCLIC AND ACYCLIC DIENE COPOLYMER AND RUBBER COMPOSITION - A process for preparing a copolymer of an acyclic conjugated diene and a cyclic conjugated diene using a polymerization catalyst system comprising a transition metal compound or a lanthanide metal compound, an alkylating agent, and an inorganic halide alcoholate, and rubber compositions and tires comprising the same. The copolymer contains at least 90% acyclic conjugated diene monomer, has a number average molecular weight of between 40,000 and 300,000, and has a cis-bond content of at least 92% | 09-25-2014 |
20150148489 | POLYMERS FUNCTIONALIZED WITH NITRILE COMPOUNDS CONTAINING A PROTECTED AMINO GROUP - A method for preparing a functionalized polymer, the method comprising the steps of: (i) polymerizing monomer with an anionic initiator to form a reactive polymer; and (ii) reacting the reactive polymer with a nitrile compound containing a protected amino group, where the protected amino group is directly attached to a moiety selected from the group consisting of acyclic moieties, heterocyclic moieties, and non-aromatic cyclic moieties. | 05-28-2015 |