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1.发明公开公开(公告)号：US20240352200A1
公开(公告)日：2024-10-24
申请号：US18034419
申请日：2021-10-21
Applicant: TOKUYAMA CORPORATION
Inventor： Manabu Kondou , Masahiro Nakamura
CPC classification number: C08J3/203 , C08J3/242 , C08K3/36 , C08K5/548 , C08K9/04 , C08L7/00 , C08J3/22 , C08J2307/00 , C08J2309/00 , C08K2201/006 , C08L2310/00
Abstract: A method for producing a rubber composition includes: applying a compression process to a fumed silica having a BET specific surface area of 200 m2/g or more to obtain a compressed fumed silica having a tap density of 200 g/L or more; and kneading the compressed fumed silica and diene rubber. A fumed silica for rubber composition is obtained by a surface treatment with a mercapto-thiocarboxylate oligomer, and has a tap density of 200 g/L or more and a BET specific surface area of 200 m2/g or more. A rubber composition contains a compressed fumed silica having a tap density of 200 g/L or more and a BET specific surface area of 200 m2/g or more; a natural rubber; and a mercapto-thiocarboxylate oligomer.
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公开(公告)号：US20240400768A1
公开(公告)日：2024-12-05
申请号：US18697034
申请日：2022-09-28
Applicant: Tokuyama Corporation
Inventor： Manabu Kondou , Masahiro Nakamura , Yasuhiko Kudo , Tomoki Matsumoto
Abstract: A masterbatch contains 13 parts by mass or more and 130 parts by mass or less of hydrophilic fumed silica, and 1 part by mass or more and 40 parts by mass or less of a silane coupling agent, with respect to 100 parts by mass of a diene-based rubber. A rubber composition for a tire contains 5 parts by mass or more and 90 parts by mass or less of hydrophilic fumed silica, and 1.5 parts by mass or more and 30 parts by mass or less of a silane coupling agent, with respect to 100 parts by mass of a diene-based rubber. A method for producing a masterbatch includes kneading a diene-based rubber, hydrophilic fumed silica, and a silane coupling agent.
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