公开(公告)号：US20240361260A1

公开(公告)日：2024-10-31

申请号：US18619796

申请日：2024-03-28

申请人： TOHOKU UNIVERSITY ,  SUMITOMO RUBBER INDUSTRIES, LTD.

发明人： Hiroshi JINNAI ,  Tomohiro MIYATA ,  Daisuke WATANABE ,  Wakana ITO ,  Takehiro KITAURA

IPC分类号： G01N23/20058

CPC分类号： G01N23/20058 ,  G01N2223/0566 ,  G01N2223/418 ,  G01N2223/602

摘要： To provide an analysis method that can analyze a crystal structure, a crystal morphology, a crystal distribution of a rubber material in stretching even in a local portion of the rubber material. The present disclosure relates to a method of analyzing a crystal structure, a crystal morphology, or a crystal distribution of a rubber material in stretching using a nanodiffraction imaging technique that analyzes an electron diffraction pattern acquired by scanning electron beams converged to a diameter of 100 nm or less on a surface of the rubber material while a behavior of stretching deformation of the rubber material and/or a state of the rubber material in stretching are observed using a transmission electron microscope.

公开(公告)号：US20230077190A1

公开(公告)日：2023-03-09

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 ,  C08K9/06 ,  G01N33/44

摘要： The present disclosure provides a chemical bond evaluation method capable of directly evaluating the presence or absence of a chemical bond between silica and a silane coupling agent. Included is a chemical bond evaluation method including evaluating the presence or absence of a chemical bond between silica and a silane coupling agent in a rubber composition containing a rubber component, the silica, and the silane coupling agent.

公开(公告)号：US20200377695A1

公开(公告)日：2020-12-03

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：US20200024432A1

公开(公告)日：2020-01-23

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 ,  C08K5/3477 ,  C08K5/01 ,  B60C1/00

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.