Patents by Inventor Masaaki Shin
Masaaki Shin has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Publication number: 20240087060Abstract: An information processing method includes receiving first information indicating a travel plan of a user, acquiring, for each on-demand vehicle service, second information indicating boarding/alighting points and operation status of a vehicle, determining and presenting, based on the first and second information, a recommended route for transferring bet ween first and second vehicles belonging to first and second on-demand vehicle services, and making a reservation with the first and second on-demand vehicle services in accordance with the recommended route.Type: ApplicationFiled: September 5, 2023Publication date: March 14, 2024Inventors: Taiki YOSHIDA, Kenta NOSE, Masaaki HASHIMOTO, Yoshihiro YAMADA, Tomohiro SHIN
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Patent number: 7846630Abstract: A binder resin for toner includes a hybrid resin of a crystalline resin (X) and an amorphous resin (Y), having a peak molecular weight of 30,000 or larger, and an amorphous resin (Z) having a peak molecular weight of smaller than 30,000.Type: GrantFiled: June 16, 2006Date of Patent: December 7, 2010Assignee: Mitsui Chemicals, Inc.Inventors: Shuichi Murakami, Yoshihito Hirota, Masaaki Shin
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Publication number: 20090068578Abstract: A binder resin for toner includes a hybrid resin of a crystalline resin (X) and an amorphous resin (Y), having a peak molecular weight of 30,000 or larger, and an amorphous resin (Z) having a peak molecular weight of smaller than 30,000.Type: ApplicationFiled: June 16, 2006Publication date: March 12, 2009Applicant: Mitsui Chemicals, Inc.Inventors: Shuichi Murakami, Yoshihito Hiroto, Masaaki Shin
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Patent number: 6733942Abstract: The present invention relates to a toner composition for electrophotography, used for development of electrostatic image in electrophotography, electrostatic printing, etc., as well as to a process for producing such a toner composition. The toner composition of the present invention comprises a binder resin component [component (A)] and a coloring agent component [component (B)], wherein the binder resin component [component (A)] comprises a particular crosslinked aromatic polyester resin component [component (a-1)] and a particular linear aromatic polyester resin component [component (a-2)] and the proportions of the component (a-1) and the component (a-2) are 5 to 80% by weight [the component (a-1)] and 20 to 95% by weight [the component (a-2)] based on the total weight of the two components.Type: GrantFiled: May 7, 2002Date of Patent: May 11, 2004Assignee: Mitsui Chemicals, Inc.Inventors: Yuji Emura, Shoji Kawasaki, Masaaki Shin, Hiroshi Matsuoka
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Publication number: 20030008225Abstract: The present invention relates to a toner composition for electrophotography, used for development of electrostatic image in electrophotography, electrostatic printing, etc., as well as to a process for producing such a toner composition.Type: ApplicationFiled: May 7, 2002Publication date: January 9, 2003Inventors: Yuji Emura, Shoji Kawasaki, Masaaki Shin, Hiroshi Matsuoka
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Patent number: 6497983Abstract: The present invention is aimed at providing a toner binder for electrophotography that is excellent in the fixing property, offset resistance, blocking property, grindability, durable developing property and the like to correspond to the high-speed movement of a copier. The purpose of the present invention could be achieved by a toner binder having the following features for electrophotography. That is, when the viscoelasticity of the toner binder is measured in the temperature range of 50 to 200 ° C. and at a heating rate of 2° C./min., the viscoelasticity curve in the temperature range of 100 to 200° C. showing the relationship between the storage modulus and temperature, in which curve the axis of ordinate is the logarithm (Pa) of storage modulus G′ and the axis of abscissa is temperature (° C.), has a concave in the temperature range of 140 to 180° C.Type: GrantFiled: October 12, 2001Date of Patent: December 24, 2002Assignee: Mitsui Chemicals, Inc.Inventors: Tsuyoshi Iwa, Kazuya Sakata, Shoji Kawasaki, Masaaki Shin
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Publication number: 20020076637Abstract: The present invention is aimed at providing a toner binder for electrophotography that is excellent in the fixing property, offset resistance, blocking property, grindability, durable developing property and the like to correspond to the high-speed movement of a copier.Type: ApplicationFiled: October 12, 2001Publication date: June 20, 2002Inventors: Tsuyoshi Iwa, Kazuya Sakata, Shoji Kawasaki, Masaaki Shin
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Patent number: 5427883Abstract: The present invention provides a toner composition mainly comprising a binder resin (D) which contains at least 20% by weight of an urethane-modified polyester resin (C) obtained by reacting a polyester resin (A) with an isocyanate compound (B) and whose gel fraction ranges from 2 to 75% by weight. The toner composition exhibits good melting properties upon heating suitable for fast reproduction such as a low lower limit of the fixing temperature and a wide range for permitted fixing temperature and is further excellent in resistance to blocking, resistance to carrier contamination and image-forming properties. The binder resin as the main component of the toner composition can be prepared according to a method comprising the step of continuously adding an isocyanate compound (B) to a polyester resin (A) in an equivalent ratio, NCO/OH, of the amount of the NCO groups of the isocyanate compound (B) to that of OH groups of the polyester resin (A) ranging from 0.3 to 1.Type: GrantFiled: November 18, 1994Date of Patent: June 27, 1995Assignee: Mitsui Toatsu Chemicals, IncorporatedInventors: Akira Misawa, Kazuo Hisamatsu, Keiichi Ishikawa, Kazuo Hagiwara, Masaaki Shin
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Patent number: 5370958Abstract: An object of the present invention is to provide an electrophotographic toner for high-speed copying machines having a high hot-roll speed and capable of fixing a toner at lower temperatures. The toner according to the present invention comprises a vinyl resin which has a wide molecular-weight distribution (Mn:1,000-20,000, Mw: 50,000-2,000,000), a glass transition temperature (Tg) of 40.degree.-75.degree. C. and a low acid value (AV:1-10); and a glycidyl compound in an amount sufficient to provide 0.05-1.0 equivalent of glycidyl groups per equivalent of COOH groups in the vinyl resin. It assures well-balanced fixing property, offset resistance and blocking resistance. In particular, it exhibits a remarkable effect in improving offset resistance and also in grindability during the production of the toner.Type: GrantFiled: January 29, 1993Date of Patent: December 6, 1994Assignee: Mitsui Toatsu Chemicals, IncorporatedInventors: Masaaki Shin, Kenji Uchiyama, Yasuo Okada
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Patent number: 5362595Abstract: This invention discloses electrophotographic toners and the methods for their preparation. The electrophotographic toners contain resin and coloring agents as primary components. The resin is a non-crosslinked polymer of vinyl monomers or its mixtures, and has a number average molecular weight (Mn) of 2,000-15,000, a Z average molecular weight (Mz) of not less than 400,000 and Mz/Mn of 50-600. The electrophotographic toners exert an excellent fixing ability at high duplication speed or at lower temperatures.Type: GrantFiled: October 26, 1992Date of Patent: November 8, 1994Assignee: Mitsui Toatsu Chemicals, IncorporatedInventors: Nobuhiro Hirayama, Masaaki Shin, Shoji Kawasaki, Akira Misawa, Akio Fujiwara, Kenji Uchiyama
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Patent number: 5334473Abstract: A continuous method of treating a polymer reaction mixture for continuously separating a styrene polymer and volatile ingredient by flowing down, for example, a mixture of low molecular weight styrene polisher and high molecular weight styrene polymer through a circular-ring-shaped space formed between a jacketed double pipe and a concentrically located inner pipe of a heat-exchanger, and flashing into a vacuum chamber connected with said heat-exchanger, is provided.The polymer is useful for the preparation of electrophotographic toner.Type: GrantFiled: March 10, 1993Date of Patent: August 2, 1994Assignee: Mitsui Toatsu Chemicals, IncorporatedInventors: Nobuki Kobayashi, Yoku Shiraishi, Takashi Yamamoto, Masaaki Shin
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Patent number: 5279915Abstract: Disclosed is a toner composition for electrophotography which comprises, as a principal component, a urethane-modified polyester resin whose loss tangent (tan .delta.) has a maximum and a minimum both falling within the range of from 0.7 to 2.5, the loss tangent being determined at 150.degree. C. and a frequency ranging from 10.sup.-2 to 10 Hz. The toner composition has excellent low temperature fixing ability and offset resistance as well as a wide range of permitted fixing temperature.Type: GrantFiled: December 19, 1989Date of Patent: January 18, 1994Assignee: Mitsui Toatsu Chemicals, Inc.Inventors: Kazuo Hagiwara, Akira Misawa, Kazuo Hisamatsu, Keiichi Ishikawa, Masaaki Shin
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Patent number: 5202212Abstract: A toner composition for electrophotography comprises, as a principal component, a reaction product of a mixture which comprises 20 to 80% by weight of a polyester resin (A) whose number average molecular weight ranges from 1,000 to 5,000, whose glass transition point ranges from 0.degree. to 50.degree. C. , whose OH value ranges from 20 to 60 KOHmg/g and which is prepared by using at least one trifunctional alcohol in an amount of from 2 to 10 mole % on the basis of the total amount of starting raw alcohols consisting of at least one diol and at least one trifunctional alcohol; and 80 to 20% by weight of a polyester resin (B) whose number average molecular weight ranges from 1,000 to 5,000, whose glass transition point ranges from 50.degree. to 90.degree. C. and whose OH value is not more than 5 KOH mg/g, with a diisocyanate.Type: GrantFiled: July 29, 1992Date of Patent: April 13, 1993Assignee: Mitsui Toatsu Chemicals, Inc.Inventors: Masaaki Shin, Kazuo Hagiwara, Akira Misawa, Kazuo Hisamatsu, Keiichi Ishikawa
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Patent number: 5084368Abstract: This invention discloses electrophotogrpahic toners and the methods for their preparation. The electrophotographic toners contain resin and coloring agents as primary components. The resin is a non-crosslinked polymer of vinyl monomers or its mixtures, and has a number average molecular weight (Mn) of 2,000-15,000, a Z average molecular weight (Mz) of not less than 400,000 and Mz/Mn of 50-600. The electrophotographic toners exert an excellent fixing ability at high duplication speed or at lower temperatures.Type: GrantFiled: February 24, 1989Date of Patent: January 28, 1992Assignee: Mitsui Toatsu Chemicals, IncorporatedInventors: Nobuhiro Hirayama, Masaaki Shin, Shoji Kawasaki, Akira Misawa, Akio Fujiwara, Kenji Uchiyama
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Patent number: 5066727Abstract: A toner resin contains a specific polymer as its principal component. The polymer is obtained by mixing 20-80 parts by weight of a low molecular polymer having a number average molecular weight of 1,000-5,000 and a glass transition temperature (Tg) of 40.degree.-75.degree. C., 80-20 parts by weight of a vinyl monomer, 0.01-5 parts by weight of a polymerization initiator and 0-3 parts by weight of a crosslinking agent, dispersing the resultant mixture in an aqueous system and then polymerizing same. The toner resin has excellent low-temperature fixing property and offsetting resistance, can provide marks of superb vividness, and also can prevent modifications of copied marks, for example, due to transfer of a plasticizer.Type: GrantFiled: June 26, 1989Date of Patent: November 19, 1991Assignee: Mitsui Toatsu Chemicals IncorporatedInventors: Hironori Aizawa, Masaaki Shin, Atsuo Okubo
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Patent number: 5037715Abstract: A resin for toner of electrophotography comprises a urethane-modified polyester resin (D) having a glass transition temperature ranging from 40.degree. to 75.degree. C., which is obtained by reacting a resin mixture composed of a polyester resin (A) having a number-averaging molecular weight of 1,000 to 15,000 and a hydroxyl value of 10 to 100 and a polyester resin (B) having a number-average molecular weight ranging from 1,000 to 5,000 and a sum of acid value and hydroxyl value of less than 10, in a weight ratio of (A)/(B) ranging from 20:80 to 60:40, with 0.3 to 0.99 molar equivalent of an isocyanate compound (C) per one molar equivalent of hydroxyl group of the polyester resin (A).The resin for toner is excellent in grindability and storage stability and it provides toners for electrophotography having good anti-blocking properties and good fixing properties whereby good images free of fogging can be obtained.Type: GrantFiled: June 11, 1990Date of Patent: August 6, 1991Assignee: Mitsui Toatsu Chemicals, Inc.Inventors: Kazuo Hagiwara, Akira Misawa, Kazuo Hisamatsu, Masaaki Shin
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Patent number: 5001031Abstract: An electrophotographic toner composition is provided. It contains a vinyl polymer having a number average molecular weight of 1,000-10,000, a weight average molecular weight/number average molecular weight ratio of 41-200, a glass transition temperature of 50.degree.-70.degree. C., and specific shear rates at 110.degree. C. and 190.degree. C. respectively. The toner composition affords vivid copy marks even when used in a small amount, and exhibits good fixing property even at low temperatures.Type: GrantFiled: September 14, 1988Date of Patent: March 19, 1991Assignee: Mitsui Toatsu Chemicals, IncorporatedInventors: Takashi Yamamoto, Masaaki Shin
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Patent number: 4981923Abstract: A resin for toner of electrophotography comprises a urethane-modified polyester resin (D) having a glass transition temperature ranging from 40.degree. to 75.degree. C., which is obtained by reacting a resin mixture composed of a polyester resin (A) having a number-average molecular weight of 1,000 to 15,000 and a hydroxyl value of 10 to 100 and a polyester resin (B) having a number-average molecular weight ranging from 1,000 to 5,000 and a sum of acid value and hydroxyl value of less than 10, in a weight ratio of (A)/(B) ranging from 20:80 to 60:40, with 0.3 to 0.99 molar equivalent of an isocyanate compound (C) per one molar equivalent of hydroxyl group of the polyester resin (A).The resin for toner is excellent in grindability and storage stability and it provides toners for electrophotography having good anti-blocking properties and good fixing properties whereby good images free of fogging can be obtained.Type: GrantFiled: May 31, 1989Date of Patent: January 1, 1991Assignee: Mitsui Toatsu Chemicals, Inc.Inventors: Kazuo Hagiwara, Akira Misawa, Kazuo Hisamatsu, Masaaki Shin
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Patent number: 4963456Abstract: Electrophotographic toner is provided which contains 30-80% by weight of a polymer per total weight of a resin included in the toner, said polymer is obtained by continuously feeding a vinyl monomer, a polymerization initiator and a solvent into a system of 190.degree.-230.degree. C. to conduct polymerization under a liquid state, and said polymer is a vinyl polymer having a number average molecular weight of 1,000-5,000 and a glass transition temperature of 40.degree.75.degree. C. The preparation method of the electrophotographic toner is also provided. The toner is excellent in the fixing ability at high duplication speed and lower temperatures.Type: GrantFiled: February 22, 1989Date of Patent: October 16, 1990Assignee: Mitsui Toatsu Chemicals, IncorporatedInventors: Masaaki Shin, Nobuhiro Hirayama, Keiichi Ishikawa, Akira Misawa
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Patent number: 4857433Abstract: An electrophotographic toner, which can exhibit good fixation in high-speed copying and is not affected by an environment such as high humidity, is provided by containing, as a principal component thereof, a resin blend composed of (a) 40-90 wt. % of a vinyl copolymer (I) formed of 70-97 wt. % of an aromatic vinyl monomer, 3-30 wt. % of an alkyl fumarate which is an C.sub.1-8 monoalkyl or dialkyl ester and 0-5 wt. % of an acid monomer and having a number average molecular weight of 2,000-15,000 and (b) 10-60 wt. % of a vinyl polymer (II) having a number average molecular weight of 20,000-500,000.Type: GrantFiled: October 8, 1987Date of Patent: August 15, 1989Assignee: Mitsui Toatsu Chemicals, IncorporatedInventors: Masaaki Shin, Akio Fujiwara, Hiroshi Taniwaki