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Makoto Ashiura

Makoto Ashiura, Hiratsuka JP

Patent application numberDescriptionPublished
20100113684METHOD 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
20110086981MANUFACTURING METHOD FOR SURFACE-MODIFIED RUBBER MOLDED BODY - A manufacturing method for a surface-modified rubber molded body is described. An uncross-linked rubber molded body is made of a rubber composition containing an organic peroxide and a modified butyl rubber composition (A) containing a modified butyl rubber (1) where a compound (a) with a stable nitroxide free radical in the molecule at ambient temperature in the presence of oxygen, a radical initiator (b), and a radical polymeric monomer (c) with at least difunctionality are reacted with butyl rubber, or a modified butyl rubber composition (B) where the monomer (c) is added to a modified butyl rubber (2) where the compound (a) and the radical initiator (b) are reacted with butyl rubber. A siloxane compound having a (meth)acryloyl group is applied onto the surface of the uncross-linked rubber molded body. The uncross-linked rubber molded body is then heat-treated.04-14-2011

Makoto Ashiura, Kanagawa JP

Patent application numberDescriptionPublished
20080207845Method For Producing Modified Polymer And Modified Polymer Produced By The Same - A method for producing a modified polymer by reacting a tetramethylpiperidinyloxy (TEMPO) derivative having a functional group (A) and a polymer in the presence of a radical initiator to produce a polymer having the functional group (A) grafted thereon, and then, optionally, after adding additives, reacting the resultant reaction product with a compound having a functional group (B) capable of reacting with the functional group (A), whereby it is possible to simply and inexpensively introduce compounds having various types of functional groups into a nonpolar polymer.08-28-2008
20090143525MODIFIED CONJUGATED DIENE-BASED POLYMER RUBBER AND RUBBER COMPOSITION CONTAINING THE SAME - A modified conjugated diene-based polymer rubber obtained by reacting, a siloxane compound having at least one ketimine group or aldimine group and at least two alkoxysilyl groups in a molecule to polymerization active ends of a polymer or copolymer obtained by solution polymerization of a conjugated diene monomer or a conjugated diene monomer and an aromatic vinyl compound monomer in the presence of an organic active metal catalyst and a rubber composition containing the modified conjugated diene-based polymer rubber and having an improved processability, heat buildup and abrasion resistance.06-04-2009
20090292044MODIFIED DIENE-BASED RUBBER AND RUBBER COMPOSITION CONTAINING THE SAME - To modify a diene-based rubber whereby the dispersibility of silica and the abrasion resistance or heat buildup resistance are improved.11-26-2009
20100232088SEALING MATERIAL FOR ELECTROLYTIC CAPACITOR AND ELECTROLYTIC CAPACITOR EMPLOYING THE SEALING MATERIAL - An electrolytic capacitor sealer capable of fulfilling the requirement such as long-term heat resistance without risk of reversion due to crosslinking with an organic peroxide and an electrolytic capacitor using such a sealer are provided.09-16-2010

Patent applications by Makoto Ashiura, Kanagawa JP

Makoto Ashiura, Kanagawa-Ken JP

Patent application numberDescriptionPublished
20100179280SULFUR-CONTAINING CONJUGATED DIOLEFIN COPOLYMER RUBBER, AND RUBBER COMPOSITION COMPRISING THE SAME - Disclosed is a sulfur-containing conjugated diolefin copolymer rubber composed of a conjugated diolefin and an aromatic vinyl compound, wherein (1) the content of sulfur bound to the rubber is 0.01 mmol % or more, (2) the content of the aromatic vinyl compound polymerization unit is not less than 5 wt % and less than 45 wt % relative to the amount of the copolymer rubber, and (3) the content of a vinyl bond (a 1,2-bond) in the conjugated diolefin polymerization unit is 30 mol % or more relative to the amount of the conjugated diolefin polymerization unit. In the the copolymerization between the conjugated diolefin and the aromatic vinyl compound, a specific sulfur-containing polymerization terminator is used to terminate the reaction of the copolymerization. The sulfur-containing conjugated diolefin copolymer rubber has good processability and a good balance among wear resistance, fracture properties and low hysteresis loss.07-15-2010

Makoto Ashiura, Hiratsuka-Shi JP

Patent application numberDescriptionPublished
20080262147MODIFIED BUTYL RUBBER COMPOSITION - A modified butyl rubber composition containing a modified butyl rubber obtained by a modification reaction of a compound (a) having a nitroxide-free radical, stable in the presence of oxygen at an ordinary temperature, in the molecule thereof and a radical initiator (b) and at least two kinds of bi- or more-functional radical polymerizable monomers (c).10-23-2008
20090093587MODIFIED BUTYL RUBBER COMPOSITION - A modified butyl rubber composition comprising a butyl rubber modified by mixing, under heating, (a) a compound having a nitroxide-free radical in the molecule thereof, which is stable at an ordinary temperature even in the presence of oxygen, (b) a radical initiator, and (c) a bi- or more-functional radical polymerizable monomer and further by compounded with (d) a bi- or more-functional radical polymerizable monomer, which is different from the ingredient (c).04-09-2009
20090156728MODIFIED BUTYL RUBBER COMPOSITION - A modified butyl rubber composition capable cross-link an organic peroxide and having an improved modulus and strength at break is provided.06-18-2009
20090182069RUBBER COMPOSITION CONTAINING MODIFIED CONJUGATED DIENE-BASED POLYMER BONDED TO FULLERENE - A rubber composition obtained by compounding thereinto a rubber component containing 0.5 to 100% by weight of a modified conjugated diene-based polymer having a fullerene bonded thereto in the molecule and having a weight average molecular weight of 50,000 or more excellent processability, superior balance of modulus and heat buildup, excellent cold flowability and superior tan δ balance.07-16-2009
20100056723THERMOPLASTIC ELASTOMER COMPOSITION - A thermoplastic elastomer composition containing a dynamically cross-linked composition of 03-04-2010

Patent applications by Makoto Ashiura, Hiratsuka-Shi JP