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公开(公告)号：US20230323072A1
公开(公告)日：2023-10-12
申请号：US18043581
申请日：2021-08-02
发明人： Tomoyuki KOSAI
IPC分类号： C08J11/28
CPC分类号： C08J11/28 , C08J2300/106 , C08J2300/30
摘要： A method for cleaving a coordinate bond of a complex polymer that contains at least one polymer chain and a plurality of nitrogen- and/or phosphorus-containing functional groups which are bonded to the polymer chain and capable of forming coordinate bonds, wherein the coordinately-bondable nitrogen- and/or phosphorus-containing functional groups form a coordinate bond via a metal ion, characterized in that the method includes dissolving the complex polymer in a solvent containing a free ligand, to cleave the coordinate bond.
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2.发明公开公开(公告)号：US20240150513A1
公开(公告)日：2024-05-09
申请号：US18546385
申请日：2021-12-06
发明人： Yasuhiro SHODA , Tomoyuki KOSAI , Ryota SONE
IPC分类号： C08F283/10 , B60C1/00 , C08L9/06
CPC分类号： C08F283/10 , B60C1/0016 , C08L9/06
摘要： Provided is an epoxy resin which can improve the durability when used with a rubber material, and a method of producing an epoxy resin. In the present disclosure, a diene-based polymer is grafted onto a main chain of an epoxy resin.
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3.发明公开公开(公告)号：US20230322965A1
公开(公告)日：2023-10-12
申请号：US18043040
申请日：2021-08-02
发明人： Tomoyuki KOSAI
摘要： An object of the present disclosure is to provide a polymer which is recyclable and capable of performing as equally well as a new product. Another object of the present disclosure is to provide a rubber composition containing said polymer, a method for manufacturing said rubber composition, and a rubber product containing said rubber composition. To achieve the objects, the present disclosure provides a complex polymer, comprising: a polymer main chain containing a conjugated diene unit and/or an olefin unit; and a functional group bonded to the polymer main chain, wherein: the functional group contains nitrogen atom and/or phosphorus atom therein and is complexed with a metal ion of an element of group 7-10 in the Periodic Table; and the bond dissociation energy for dissociation of the metal ion and the functional group is 200 kJ/mol or more.
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公开(公告)号：US20230220187A1
公开(公告)日：2023-07-13
申请号：US18008850
申请日：2021-05-27
发明人： Tomoyuki KOSAI
CPC分类号： C08L9/06 , B60C1/00 , C08K5/38 , C08K5/47 , B60C2001/0066
摘要： Provided is a pneumatic tire that has excellent fuel efficiency and rubber strength and combines high load capacity and space saving. A pneumatic tire mounted on a vehicle, comprises: a tread configured to come into contact with a road surface; and a belt layer located on an inner side of the tread in a tire radial direction, wherein an outer diameter of the pneumatic tire is 350 mm or more and 600 mm or less, the following relationship:
0.78≤RW/SW≤0.88
is satisfied, where RW is a rim width of a rim wheel to be attached to the pneumatic tire and SW is a tire section width of the pneumatic tire, and a rubber composition that contains: a rubber component containing a diene-based rubber; and a mercaptocarboxylic acid compound is used in the pneumatic tire.-
公开(公告)号：US20230183456A1
公开(公告)日：2023-06-15
申请号：US17917139
申请日：2021-04-12
发明人： Tomoyuki KOSAI
摘要： A rubber composition contains a rubber component containing at least one selected from the group consisting of an isoprene rubber, a butadiene rubber, and a styrene-butadiene copolymer rubber, and a compound (1) represented by the following general formula (1). By using the rubber composition, it is possible to produce a rubber product having an excellent balance between a low strain hysteresis loss and a high strain hysteresis loss.
[R1 and R2 in the general formula (1) each independently represent a hydrogen atom, an alkyl group having 1 to 20 carbon atoms, or an aryl group having 5 to 20 carbon atoms.]-
公开(公告)号：US20230151132A1
公开(公告)日：2023-05-18
申请号：US17995524
申请日：2021-04-15
发明人： Tomoyuki KOSAI
IPC分类号： C08F236/06 , C08F212/08 , C08K5/372 , C08K3/04 , B60C1/00
CPC分类号： C08F236/06 , C08F212/08 , C08K5/372 , C08K3/04 , B60C1/00
摘要： Provided is a rubber composition that can improve the balance between the hysteresis loss of rubber at low strain and the hysteresis loss of rubber at high strain. The rubber composition comprises a rubber component, and at least one compound selected from the group consisting of the general formulas (1) and (2),
HS—R—COOM (1), and
MOCO—R—(S)n—R—COOM (2),
where R is independently a linear or branched hydrocarbylene group having 8 or more carbon atoms in a linear portion connecting the sulfur atom and the COOM group; M is independently an atom selected from the group consisting of an alkali metal and an alkaline earth metal; and n is an integer from 2 to 8.
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