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公开(公告)号：US20140213700A1
公开(公告)日：2014-07-31
申请号：US14148427
申请日：2014-01-06
Applicant: SUMITOMO RUBBER INDUSTRIES, LTD.
Inventor： Tatsuya MIYAZAKI , Sumiko MIYAZAKI
IPC: C08L15/00
CPC classification number: C08L7/02 , B60C1/00 , C08K7/02 , C08L9/00 , C08L33/00 , C08L2205/16 , C08L2310/00
Abstract: Provided are a rubber composition in which microfibrillated plant fibers are sufficiently uniformly dispersed to improve tire performance requirements in a balanced manner, and a pneumatic tire formed from the rubber composition. The present invention relates to a rubber composition formed from a masterbatch containing a rubber latex and microfibrillated plant fibers, the masterbatch being obtained by stirring the microfibrillated plant fibers in a solvent with a circulation type or continuous homogenizer and mixing the resulting microfibrillated plant fiber solution with the rubber latex and a cationic polymer, the microfibrillated plant fibers having a mean fiber length of 10 to 150 μm, the microfibrillated plant fiber solution containing 0.1 to 2.0% by mass of the microfibrillated plant fibers, and the amount of the cationic polymer being 0.01 to 5 parts by mass per 100 parts by mass of the rubber component of the rubber latex.
Abstract translation: 提供了一种橡胶组合物，其中微纤化植物纤维被充分均匀地分散以平衡地提高轮胎性能要求，以及由橡胶组合物形成的充气轮胎。 本发明涉及由含有橡胶胶乳和微纤化植物纤维的母料形成的橡胶组合物，母料通过在循环型或连续均化器中将溶剂中的微纤化植物纤维搅拌并将所得微纤化植物纤维溶液与 橡胶胶乳和阳离子聚合物，平均纤维长度为10〜150μm的微纤化植物纤维，含有0.1〜2.0质量％的微纤化植物纤维的微纤化植物纤维溶液，阳离子聚合物的量为0.01 至每100质量份橡胶胶乳的橡胶组分为5质量份。
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公开(公告)号：US20220380578A1
公开(公告)日：2022-12-01
申请号：US17881852
申请日：2022-08-05
Applicant: SUMITOMO RUBBER INDUSTRIES, LTD.
Inventor： Sumiko MIYAZAKI , Daisuke SATO
Abstract: The present invention provides nanocellulose/surfactant composites having excellent redispersibility in water and related compositions and methods, including methods for producing the composites. Included is a nanocellulose/surfactant composite containing a nanocellulose and a surfactant, the nanocellulose/surfactant composite having a moisture content of lower than 10%, the surfactant including an ionic surfactant having a weight average molecular weight of 3000 or more.
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公开(公告)号：US20190002671A1
公开(公告)日：2019-01-03
申请号：US15994173
申请日：2018-05-31
Applicant: Sumitomo Rubber Industries, Ltd.
Inventor： Daisuke SATO , Sumiko MIYAZAKI
Abstract: The present invention provides a rubber composition which provides a balanced improvement of initial wet grip performance, wet grip performance after aging, fuel economy, and abrasion resistance. Also provided is a pneumatic tire formed from the rubber composition. The rubber composition contains: a rubber component including a diene rubber; and a glycerol fatty acid triester of plant origin. The glycerol fatty acid triester has a content of saturated fatty acids of 10 to 25% by mass and a content of monovalent unsaturated fatty acids having one unsaturated bond of less than 50% by mass, each based on 100% by mass of the constituent fatty acids of the triester.
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公开(公告)号：US20230226854A1
公开(公告)日：2023-07-20
申请号：US18001446
申请日：2021-05-20
Applicant: Sumitomo Rubber Industries, Ltd.
Inventor： Sumiko MIYAZAKI , Daisuke SATO
IPC: B60C1/00 , C08K5/1565 , C08F136/08 , C08L17/00 , C08K3/04 , C08K3/36
CPC classification number: B60C1/0025 , C08K5/1565 , C08F136/08 , C08L17/00 , C08K3/04 , C08K3/36
Abstract: The present disclosure provides a tire in which cracks or other defects on the surface of a tire component can be reduced to provide an excellent market life. A tire including a rubber layer and satisfying the following relationships (1) and (2): E1/E2×100>25 (1); and E1/E2×T×100>50 (2) wherein E1 denotes the fracture energy (MPa·%) determined by cutting a No. 7 dumbbell-shaped specimen cut out of the rubber layer, heat-treating the specimen with the cut sections attached to each other at 170° C. for 12 minutes, and then stretching and deforming the specimen; E2 denotes the fracture energy (MPa·%) determined by heat-treating a No. 7 dumbbell-shaped specimen cut out of the rubber layer at 170° C. for 12 minutes and then stretching and deforming the specimen; and T denotes the thickness (mm) of the rubber layer.
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公开(公告)号：US20180118898A1
公开(公告)日：2018-05-03
申请号：US15787160
申请日：2017-10-18
Applicant: SUMITOMO RUBBER INDUSTRIES, LTD.
Inventor： Sumiko MIYAZAKI
CPC classification number: C08J3/226 , B60C1/00 , C08J3/203 , C08J3/22 , C08J5/02 , C08J5/045 , C08J2307/02 , C08K3/013 , C08L9/00 , C08L21/02
Abstract: The present invention provides a method for producing a masterbatch and related products which enhance the dispersibility of fillers in rubber to improve the balance of tensile strength, rigidity, and fuel economy. Provided is a method for producing a masterbatch, including a step of mixing a rubber latex having a zeta potential of −100 to −20 mV with a filler dispersion having a zeta potential of 10 to 90 mV, and preparing a latex compound having a zeta potential of −20 to 0 mV.
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Patent Agency Ranking
公开(公告)号：US20190338084A1
公开(公告)日：2019-11-07
申请号：US16480139
申请日：2018-01-19
Inventor： Sumiko MIYAZAKI , Takafumi KAWASAKI , Kotaro ITO , Yusuke YASUKAWA
Abstract: The present invention aims to provide a method for producing a masterbatch with improved rubber physical properties such as tensile strength at break, rigidity, and fuel economy at high productivity by enhancing the amount of fillers incorporated into rubber and the dispersibility of fillers in rubber, as well as related products. The present invention relates to a method for producing a masterbatch, including: step (1) of mixing a rubber latex having a zeta potential of −100 to −20 mV with a filler dispersion having a zeta potential of −120 to −10 mV to prepare a latex compound; step (2) of adjusting the zeta potential of the latex compound obtained in step (1) to −30 to 0 mV; and step (3) of solidifying the coagulum obtained in step (2) with an organic solvent.
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公开(公告)号：US20180099528A1
公开(公告)日：2018-04-12
申请号：US15718864
申请日：2017-09-28
Applicant: SUMITOMO RUBBER INDUSTRIES, LTD.
Inventor： Kenya WATANABE , Sumiko MIYAZAKI
CPC classification number: B60C1/0016 , B60C1/00 , B60C11/005 , B60C2001/0083 , C08L7/00 , C08L9/00
Abstract: Provided are a rubber composition for studless winter tires that can improve not only performance on snow and ice but also abrasion resistance, thereby simultaneously achieving excellent performance on snow and ice and excellent abrasion resistance, and a studless winter tire formed from the rubber composition. The rubber composition for studless winter tires contains: a rubber component; a chemically modified microfibrillated cellulose; carbon black; and silica, the chemically modified microfibrillated cellulose having an average fiber diameter of 0.1 μm or less, the rubber component having a combined amount of natural rubber and polybutadiene rubber of 30-100% by mass based on 100% by mass of the rubber component, the rubber composition containing, per 100 parts by mass of the rubber component, 1-10 parts by mass of the chemically modified microfibrillated cellulose, 10-80 parts by mass of the carbon black, and 10-80 parts by mass of the silica.
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公开(公告)号：US20180016402A1
公开(公告)日：2018-01-18
申请号：US15547215
申请日：2016-02-09
Inventor： Sumiko MIYAZAKI , Takahiro MABUCHI , Takafumi KAWASAKI , Takeshi NAKAYAMA , Takeshi FUJII
Abstract: The present invention provides, inter alia, a method for producing a masterbatch in which the dispersibility of microfibrillated plant fibers is further increased to obtain excellent processability and improved rubber properties such as fuel economy, tensile strength, and elongation at break. The present invention relates to a method for producing a masterbatch, the method including step (I) of mixing a rubber latex with microfibrillated plant fibers oxidized with an N-oxyl compound to obtain a mixture, and coagulating the mixture by adjusting its pH to 2 to 6.
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公开(公告)号：US20160272792A1
公开(公告)日：2016-09-22
申请号：US15055025
申请日：2016-02-26
Applicant: SUMITOMO RUBBER INDUSTRIES, LTD.
Inventor： Sumiko MIYAZAKI
CPC classification number: C08L7/00 , C08K3/04 , C08K3/06 , C08K3/22 , C08K5/09 , C08K5/18 , C08K5/47 , C08L1/02 , C08L1/10 , C08L9/00 , C08L9/06 , C08L19/00 , C08L23/22 , C08L91/00 , C08L2205/03 , C08L2666/26 , Y02T10/862
Abstract: Provided are a rubber composition that is environmentally friendly and achieves both excellent breaking properties and low energy loss, and a tire that includes a component prepared using the same and is environmentally friendly and excellent in rolling resistance properties and durability. The present invention provides a rubber composition containing a rubber component, a specific chemically modified microfibrillated cellulose, and carbon black.
Abstract translation: 提供一种环保的橡胶组合物，能够实现优异的断裂性能和低能量损失，以及包含使用该橡胶组合物制备的环氧树脂，耐滚动性和耐久性优异的组分的轮胎。 本发明提供含有橡胶成分，特定化学改性微纤化纤维素和炭黑的橡胶组合物。
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公开(公告)号：US20190119473A1
公开(公告)日：2019-04-25
申请号：US16085285
申请日：2017-03-15
Inventor： Sumiko MIYAZAKI , Kenya WATANABE , Takafumi KAWASAKI , Kotaro ITO
Abstract: The present invention aims to provide a rubber composition which has further enhanced dispersion of microfibrillated cellulose in rubber to provide excellent processability and further to provide excellent rigidity, tensile properties, and fuel economy while maintaining a good balance between them. The present invention also aims to provide a pneumatic tire formed from the rubber composition with high productivity which provides excellent handling stability, durability, and rolling resistance properties while maintaining a good balance between them. The rubber composition of the present invention contains: a rubber component; a chemically modified microfibrillated cellulose; and a filler, the chemically modified microfibrillated cellulose having a structure in which the hydroxyl hydrogen atoms of microfibrillated cellulose are partly substituted with a cationic group of a cationic group-containing compound.
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