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公开(公告)号：US20240360299A1
公开(公告)日：2024-10-31
申请号：US18609757
申请日：2024-03-19
CPC分类号： C08L9/06 , B60C1/0016 , C08L21/00
摘要： A tire tread is formed from a rubber composition comprising a blend of elastomers comprising predominantly of polybutadiene; from about 100 phr to about 130 phr of silica; and from about 35 phr or more of a plasticizing hydrocarbon resin; wherein the rubber composition is partially or fully devoid of a liquid plasticizer.
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公开(公告)号：US12122187B2
公开(公告)日：2024-10-22
申请号：US17285712
申请日：2019-10-07
IPC分类号： B60C1/00 , C08F8/08 , C08F236/08 , C08K3/04 , C08K3/06 , C08K3/22 , C08K5/09 , C08K5/47 , C08L7/00 , C08L75/04
CPC分类号： B60C1/0016 , C08F8/08 , C08F236/08 , C08K3/04 , C08K3/06 , C08K3/22 , C08K5/09 , C08K5/47 , C08L7/00 , C08L75/04 , B60C2200/06 , B60C2200/08 , C08K2003/2296 , C08L2312/00
摘要： A tire having improved mechanical properties, comprises a rubber composition based on at least one epoxidized polyisoprene having a molar degree of epoxidation ranging from 5% to 85%, at least one thermoplastic polyurethane, and a crosslinking system.
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3.发明授权公开(公告)号：US12110354B2
公开(公告)日：2024-10-08
申请号：US17271097
申请日：2019-08-22
发明人： Kazuya Uenishi , Yu Shinke , Yoshihiro Kameda , Masaki Sato , Ayaki Kazariya , Hideaki Sawa
IPC分类号： C08F236/10 , C08C19/44 , C08F4/48 , C08K3/013 , B60C1/00
CPC分类号： C08F236/10 , C08C19/44 , C08F4/48 , C08K3/013 , B60C1/0016 , B60C1/0025
摘要： An object of the present invention is to provide a method of producing a copolymer that produces an aromatic vinyl-diene copolymer having a low glass transition temperature, and a method of producing a rubber composition using the method. The subject method produces an aromatic vinyl-diene copolymer having a content of repeating units derived from an aromatic vinyl in an amount of 18 mass % or greater, and among repeating units derived from a diene, a proportion of a vinyl structure of 8 mol % or less, a proportion of a 1,4-trans structure of 60 mol % or less, and a proportion of a 1,4-cis structure from 40 to 95 mol %, the method including copolymerizing a monomer containing an aromatic vinyl and a diene using an initiator prepared with an organolithium compound, an alkylaluminum, a metal alcoholate, and at least one polar compound selected from the group consisting of water and an alcohol.
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4.发明公开公开(公告)号：US20240327624A1
公开(公告)日：2024-10-03
申请号：US18127763
申请日：2023-03-29
CPC分类号： C08L7/00 , B60C1/0016 , C08J3/203 , C08J2307/00 , C08J2409/00
摘要： In accordance with one aspect of the exemplary embodiment, a rubber composition includes at least 20 phr of a composite material, at least 3 phr of a conjugated diene elastomer, a cure activator, and a sulfur-based cure agent. The composite material includes a reinforcing carbon black dispersed in natural rubber. The composite material and conjugated diene elastomer together provide at least 90 phr of vulcanizable elastomers in the rubber composition. The rubber composition may further include a reinforcing filler other than carbon black. The reinforcing filler may include silica. The rubber composition may include at least 5 phr, or at least 8 phr of silica, or up to 30 phr, or up to 18 phr of silica.
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公开(公告)号：US20240326361A1
公开(公告)日：2024-10-03
申请号：US18127861
申请日：2023-03-29
CPC分类号： B29C73/163 , B60C1/0016 , B60C19/12 , C08K3/36 , C08L23/22 , B29K2023/22 , B29L2030/002
摘要： A sealant composition suited to forming a sealant layer in a tire includes 100 phr elastomers, including at least 60 phr of an isobutylene-based elastomer component, and at least 5 phr of a conjugated diene-based elastomer component. The sealant composition further includes at least 5 phr of particulate filler, at least 0.5 phr of an organic peroxide, and optionally a colorant which provides the sealant with a non-black color.
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公开(公告)号：US12104046B2
公开(公告)日：2024-10-01
申请号：US18576038
申请日：2022-03-25
发明人： Hiroki Sugimoto , Rie Nakajima
IPC分类号： C08L15/00 , B60C1/00 , C08K3/36 , C08K5/5419
CPC分类号： C08L15/00 , B60C1/0016 , C08K3/36 , C08K5/5419 , C08L2205/03
摘要： A rubber composition contains 10-50 parts by mass of a thermoplastic resin in 100 parts by mass of a diene rubber containing 60 mass % or more of a styrene-butadiene rubber having a styrene content of 5-30 mass % and a vinyl content of 10-35 mass %. In a mixture containing the diene rubber and the thermoplastic resin in a mass ratio of 1:1, a difference (Tga−Tgm) between a theoretical value (Tga) of a glass transition temperature of the mixture calculated based on an average glass transition temperature (Tg1) of the diene rubber and a glass transition temperature (Tg2) of the thermoplastic resin, and a measurement value (Tgm) of a glass transition temperature of the mixture, is lower than 5° C., and a difference (Tg2−Tg1) is 50-105° C. An amount of the thermoplastic resin is 30 mass % or more in 100 mass % total of a plasticizer component contained in the rubber composition.
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公开(公告)号：US20240308272A1
公开(公告)日：2024-09-19
申请号：US18579595
申请日：2022-07-04
发明人： Hideki MIYAUCHI , Yuki TAKAHASHI
CPC分类号： B60C1/0016 , C08K3/04 , C08L7/00 , C08L9/00 , C08K2201/006
摘要： Provided is a rubber composition for a tire tread that can cause a tire to display excellent wear resistance when used in a tread. The rubber composition for a tire tread contains a rubber component and carbon black. The rubber component includes modified butadiene rubber in a proportion of 5 mass % or more and unmodified butadiene rubber in a proportion of 10 mass % or more. The carbon black has a cetyltrimethylammonium bromide adsorption specific surface area (CTAB) of 130 m2/g or more, a ratio (CTAB/IA) of CTAB (m2/g) relative to iodine adsorption number (IA) (mg/g) of not less than 0.92 and not more than 1.06, and hydrogen evolution of not less than 3,500 mass ppm and not more than 4,800 mass ppm.
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公开(公告)号：US20240279440A1
公开(公告)日：2024-08-22
申请号：US18562444
申请日：2021-12-01
发明人： Akiko OGIWARA
CPC分类号： C08L7/00 , B60C1/0016 , C08K3/04 , C08K3/36 , C08K5/1545 , C08K5/32 , C08L2205/03 , C08L2205/16
摘要： Provided is a vulcanized rubber composition having good on-ice performance and excellent wear resistance. The rubber composition of the present disclosure contains a rubber component containing natural rubber, a cyclic polyol compound having a hydrocarbyl group, and a liquid polymer having a polystyrene-equivalent weight-average molecular weight of 5000 or more and less than 40000 measured by gel permeation chromatography.
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公开(公告)号：US20240278600A1
公开(公告)日：2024-08-22
申请号：US18567439
申请日：2022-03-15
发明人： Rei KAWAGUCHI
IPC分类号： B60C1/00 , B60C11/00 , C08C19/25 , C08K3/36 , C08K5/098 , C08K5/5419 , C08K5/548 , C08L53/02
CPC分类号： B60C1/0016 , B60C11/005 , C08C19/25 , C08K3/36 , C08K5/098 , C08K5/5419 , C08K5/548 , C08L53/02 , C08K2201/006
摘要： A rubber composition for a tire contains a diene rubber, silica, a silane coupling agent, a fatty acid metal salt, and an alkylsilane. 60-95 mass % of a specific conjugated diene rubber is used as the diene rubber and is formed by reacting a polyorganosiloxane with an active terminal of a conjugated diene-based polymer chain having the active terminal and by making a polymer block A continuous with a polymer block B. The polymer block A contains 80-95 mass % of isoprene and 5-20 mass % of aromatic vinyl, has an active terminal, and has a weight average molecular weight of 500-15000. The polymer block B contains 1,3-butadiene and an aromatic vinyl and has an active terminal. 55-90 parts by mass of silica having a CTAB adsorption specific surface area of 185 m2/g or more is used as the silica.
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公开(公告)号：US12064997B2
公开(公告)日：2024-08-20
申请号：US17316889
申请日：2021-05-11
发明人： Yoshihisa Noguchi , Keiji Takagi
CPC分类号： B60C11/11 , B60C1/0016 , B60C11/0008 , B60C11/0327 , B60C11/033 , B60C11/1376 , B60C2011/0025 , B60C2200/10 , B60C2200/14
摘要： A tread of a tire includes a plurality of blocks including a center block located on an equator plane and a side block located outward of the center block in an axial direction. Each of the plurality of blocks includes a land surface that forms a part of a tread surface. In the tread surface, a total area of the land surfaces is smaller than a total area of a portion other than the land surfaces. A complex elastic modulus at a maximum strain amplitude of 1% and a temperature of 70° C. of each block is not less than 10.0 MPa. A 300% modulus at a temperature of 75° C. of each block is not greater than 6.0 MPa.
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