公开(公告)号：US10982074B2

公开(公告)日：2021-04-20

申请号：US16093567

申请日：2017-04-26

申请人： SUMITOMO RUBBER INDUSTRIES, LTD.

发明人： Ai Matsuura ,  Lucksanaporn Tarachiwin ,  Kamalin Kanyawararak ,  Hathainat Kum-Ourm ,  Masatoshi Kobayashi ,  Takehiro Kitaura

IPC分类号： C08L7/00 ,  B60C1/00

摘要： The invention provides natural rubbers having improved processability and/or abrasion resistance, rubber compositions containing the natural rubbers, and pneumatic tires formed from the rubber compositions. The invention relates to a natural rubber which shows a 1H-NMR spectrum where the sum of peak intensities at about 4.17, 3.94, 3.84, 3.73, 3.50, and 3.41 ppm, normalized to 10,000 for the peak intensity at about 5.11 ppm, is 8.0 or less.

公开(公告)号：US11965843B2

公开(公告)日：2024-04-23

申请号：US17888654

申请日：2022-08-16

申请人： SUMITOMO RUBBER INDUSTRIES, LTD.

发明人： Masashi Fukuchi ,  Takehiro Kitaura ,  Hiroaki Yamada

IPC分类号： G01N24/08 ,  G01N33/44 ,  C08K9/06

CPC分类号： G01N24/08 ,  G01N33/445 ,  C08K9/06

摘要： A chemical bond evaluation method capable of directly evaluating the presence or absence of a chemical bond between silica and a silane coupling agent includes performing multidimensional solid-state nuclear magnetic resonance (NMR) analysis on a rubber composition comprising a rubber component, a silica, and a silane coupling agent; and evaluating the presence or absence of a chemical bond between silica and the silane coupling agent in the rubber composition containing a rubber component, the silica, and the silane coupling agent.

公开(公告)号：US11597822B2

公开(公告)日：2023-03-07

申请号：US16498258

申请日：2018-04-13

申请人： SUMITOMO RUBBER INDUSTRIES, LTD.

发明人： Takehiro Kitaura ,  Subaru Toya ,  Hayato Yoshiyasu ,  Hiroaki Yamada

IPC分类号： C08L9/06 ,  C08K3/013 ,  B60C1/00 ,  C08K5/01 ,  C08K5/3477 ,  C08L47/00 ,  C08L25/04 ,  C08K3/04 ,  C08K3/36

摘要： The present invention provides a rubber composition for tires which provides improved abrasion resistance, and a pneumatic tire containing the rubber composition. The present invention relates to a rubber composition for tires containing a rubber component including at least 80% by mass in total of at least one of an isoprene-based rubber, a polybutadiene rubber, or a styrene-butadiene rubber, the rubber composition containing, per 100 parts by mass of the rubber component, 3 to 250 parts by mass of a reinforcing filler and 0.2 to 10 parts by mass of a specific tetrazine compound.