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公开(公告)号：US20240124690A1
公开(公告)日：2024-04-18
申请号：US18278133
申请日：2022-02-21
发明人： Ryosuke Ozawa , Kazufumi Kawahara , Atsushi Bamba
IPC分类号： C08L9/06 , C08K5/1535 , C08L1/02
CPC分类号： C08L9/06 , C08K5/1535 , C08L1/02 , B60C1/00 , C08L2201/54 , C08L2205/03 , C08L2205/16 , C08L2207/324 , C08L2310/00
摘要： The present invention provides a rubber composition in which cellulose nanofibers are satisfactorily dispersed in a rubber and which can form molded objects excellent in terms of elastic modulus, wear resistance, etc. This rubber composition comprises cellulose nanofibers, a first rubber component, which is a liquid rubber, and a surfactant. In one embodiment, the cellulose nanofibers contain no ionic groups. In one embodiment, the liquid rubber has a number-average molecular weight of 1,000-80,000.
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2.发明公开公开(公告)号：US20240309208A1
公开(公告)日：2024-09-19
申请号：US18672123
申请日：2024-05-23
发明人： Hirofumi Ono , Kazufumi Kawahara , Ryosuke Ozawa , Masahiro Ohga
CPC分类号： C08L77/06 , C08B3/06 , C08B3/20 , C08J5/06 , C08L1/08 , C08L1/10 , D21H11/18 , D21H11/20 , C08J2377/06 , C08J2401/10
摘要： Provided is a resin composite having high mechanical properties which make the resin composite moldable into and usable as members for use in applications such as vehicle-mounted members and electrical materials. The resin composite comprises 0.5-40 mass % chemically modified, fine cellulose fibers and a resin, wherein the chemically modified, fine cellulose fibers have a pyrolysis initiation temperature (TD) of 270° C. or higher, a number-average fiber diameter of 10 nm or larger but less than 1 μm, and a degree of crystallinity of 60% or higher. In a preferred embodiment, the chemically modified, fine cellulose fibers have a coefficient of variation (CV) in DS unevenness ratio, DSs/DSt, of 50% or less, the DS unevenness ratio being the ratio of the modification degree (DSs) of the surface layers of the fibers to the modification degree (DSt) of the whole of the fibers.
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公开(公告)号：US20190118508A1
公开(公告)日：2019-04-25
申请号：US16089508
申请日：2017-03-29
发明人： Yamato Saito , Masayuki Nakatani , Hiroko Kawaji , Yoko Fujimoto , Hirofumi Ono , Kazufumi Kawahara
摘要： A resin composite film comprising a cellulose microfiber sheet and a resin, the resin composite film satisfying the following: (1) in a modulus mapping obtained by an examination of a cross-section with an AFM along the thickness direction, the fibers constituting the cellulose microfiber sheet have an average fiber diameter and a maximum fiber diameter, both calculated through image analysis, of 0.01-2.0 μm and 15 μm or smaller, respectively; and (2) at least one surface of the resin composite film has an overcoat resin layer having an average thickness, determined from the modulus mapping, of 0.3-100 μm.
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4.发明申请公开(公告)号：US20210222006A1
公开(公告)日：2021-07-22
申请号：US17059599
申请日：2019-05-31
发明人： Hirofumi Ono , Kazufumi Kawahara , Ryosuke Ozawa , Masahiro Ohga
摘要： Provided is a resin composite having high mechanical properties which make the resin composite moldable into and usable as members for use in applications such as vehicle-mounted members and electrical materials. The resin composite comprises 0.5-40 mass % chemically modified, fine cellulose fibers and a resin, wherein the chemically modified, fine cellulose fibers have a pyrolysis initiation temperature (TD) of 270° C. or higher, a number-average fiber diameter of 10 nm or larger but less than 1 μm, and a degree of crystallinity of 60% or higher. In a preferred embodiment, the chemically modified, fine cellulose fibers have a coefficient of variation (CV) in DS unevenness ratio, DSs/DSt, of 50% or less, the DS unevenness ratio being the ratio of the modification degree (DSs) of the surface layers of the fibers to the modification degree (DSt) of the whole of the fibers.
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公开(公告)号：US20240263396A1
公开(公告)日：2024-08-08
申请号：US18291267
申请日：2022-07-27
发明人： Hirofumi Uchimura , Hirofumi Ono , Hirotaka Asai , Yoko Fujimoto , Naoaki Yamasaki , Kazufumi Kawahara
CPC分类号： D21H15/02 , C08J5/06 , D01F2/28 , D04H1/425 , C08J2300/12
摘要： An embodiment of the present disclosure provides fine cellulose fibers that satisfy, in measurement using an automatic fiber shape analyzer, all of (i) the length weighted average fiber length of fibers having a fiber length of at least 100 μm is 110-500 μm, (ii) the average fiber diameter is at most 42.5 μm, (iii) the fine fiber area ratio is at most 90%, (iv) the number frequency of fibers having a fiber length of 20-56 μm is at most 97% among fibers having a fiber length of less than 100 μm, (v) the number frequency of fibers having a fiber length of at least 411 um is at most 54% among fibers having a fiber length of at least 100 μm, and (vi) the average fiber diameter is 20-150 nm in terms of specific surface area.
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公开(公告)号：US20240150555A1
公开(公告)日：2024-05-09
申请号：US18278099
申请日：2022-02-21
发明人： Atsushi Bamba , Kazufumi Kawahara , Ryosuke Ozawa
CPC分类号： C08L1/02 , B60C1/00 , C08J3/122 , C08K7/02 , C08L9/08 , C08L71/02 , C08J2309/08 , C08J2371/02 , C08K2201/011 , C08L2203/30
摘要： Provided are: a rubber composite in which cellulose nanofibers are well-dispersed in rubber and which has favorable characteristics (in particular, storage modulus, etc.) that make it possible to form a vulcanized rubber product having an excellent elastic modulus, excellent wear resistance, etc.; and a cellulose nanofiber-containing composition from which said rubber composite can be formed. Provided is a composition containing cellulose nanofibers and a nonionic surfactant, wherein the nonionic surfactant has, as a hydrophobic moiety, a group that has 6-30 carbon atoms and is an aliphatic or aromatic or a combination thereof.
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公开(公告)号：US10703070B2
公开(公告)日：2020-07-07
申请号：US16089508
申请日：2017-03-29
发明人： Yamato Saito , Masayuki Nakatani , Hiroko Kawaji , Yoko Fujimoto , Hirofumi Ono , Kazufumi Kawahara
摘要： A resin composite film comprising a cellulose microfiber sheet and a resin, the resin composite film satisfying the following: (1) in a modulus mapping obtained by an examination of a cross-section with an AFM along the thickness direction, the fibers constituting the cellulose microfiber sheet have an average fiber diameter and a maximum fiber diameter, both calculated through image analysis, of 0.01-2.0 μm and 15 μm or smaller, respectively; and (2) at least one surface of the resin composite film has an overcoat resin layer having an average thickness, determined from the modulus mapping, of 0.3-100 μm.
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