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).

  • Publication number: 20240087060
    Abstract: 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: Application
    Filed: September 5, 2023
    Publication date: March 14, 2024
    Inventors: Taiki YOSHIDA, Kenta NOSE, Masaaki HASHIMOTO, Yoshihiro YAMADA, Tomohiro SHIN
  • Patent number: 7846630
    Abstract: 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: Grant
    Filed: June 16, 2006
    Date of Patent: December 7, 2010
    Assignee: Mitsui Chemicals, Inc.
    Inventors: Shuichi Murakami, Yoshihito Hirota, Masaaki Shin
  • Publication number: 20090068578
    Abstract: 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: Application
    Filed: June 16, 2006
    Publication date: March 12, 2009
    Applicant: Mitsui Chemicals, Inc.
    Inventors: Shuichi Murakami, Yoshihito Hiroto, Masaaki Shin
  • Patent number: 6733942
    Abstract: 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: Grant
    Filed: May 7, 2002
    Date of Patent: May 11, 2004
    Assignee: Mitsui Chemicals, Inc.
    Inventors: Yuji Emura, Shoji Kawasaki, Masaaki Shin, Hiroshi Matsuoka
  • Publication number: 20030008225
    Abstract: 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: Application
    Filed: May 7, 2002
    Publication date: January 9, 2003
    Inventors: Yuji Emura, Shoji Kawasaki, Masaaki Shin, Hiroshi Matsuoka
  • Patent number: 6497983
    Abstract: 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: Grant
    Filed: October 12, 2001
    Date of Patent: December 24, 2002
    Assignee: Mitsui Chemicals, Inc.
    Inventors: Tsuyoshi Iwa, Kazuya Sakata, Shoji Kawasaki, Masaaki Shin
  • Publication number: 20020076637
    Abstract: 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: Application
    Filed: October 12, 2001
    Publication date: June 20, 2002
    Inventors: Tsuyoshi Iwa, Kazuya Sakata, Shoji Kawasaki, Masaaki Shin
  • Patent number: 5427883
    Abstract: 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: Grant
    Filed: November 18, 1994
    Date of Patent: June 27, 1995
    Assignee: Mitsui Toatsu Chemicals, Incorporated
    Inventors: Akira Misawa, Kazuo Hisamatsu, Keiichi Ishikawa, Kazuo Hagiwara, Masaaki Shin
  • Patent number: 5370958
    Abstract: 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: Grant
    Filed: January 29, 1993
    Date of Patent: December 6, 1994
    Assignee: Mitsui Toatsu Chemicals, Incorporated
    Inventors: Masaaki Shin, Kenji Uchiyama, Yasuo Okada
  • Patent number: 5362595
    Abstract: 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: Grant
    Filed: October 26, 1992
    Date of Patent: November 8, 1994
    Assignee: Mitsui Toatsu Chemicals, Incorporated
    Inventors: Nobuhiro Hirayama, Masaaki Shin, Shoji Kawasaki, Akira Misawa, Akio Fujiwara, Kenji Uchiyama
  • Patent number: 5334473
    Abstract: 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: Grant
    Filed: March 10, 1993
    Date of Patent: August 2, 1994
    Assignee: Mitsui Toatsu Chemicals, Incorporated
    Inventors: Nobuki Kobayashi, Yoku Shiraishi, Takashi Yamamoto, Masaaki Shin
  • Patent number: 5279915
    Abstract: 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: Grant
    Filed: December 19, 1989
    Date of Patent: January 18, 1994
    Assignee: Mitsui Toatsu Chemicals, Inc.
    Inventors: Kazuo Hagiwara, Akira Misawa, Kazuo Hisamatsu, Keiichi Ishikawa, Masaaki Shin
  • Patent number: 5202212
    Abstract: 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: Grant
    Filed: July 29, 1992
    Date of Patent: April 13, 1993
    Assignee: Mitsui Toatsu Chemicals, Inc.
    Inventors: Masaaki Shin, Kazuo Hagiwara, Akira Misawa, Kazuo Hisamatsu, Keiichi Ishikawa
  • Patent number: 5084368
    Abstract: 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: Grant
    Filed: February 24, 1989
    Date of Patent: January 28, 1992
    Assignee: Mitsui Toatsu Chemicals, Incorporated
    Inventors: Nobuhiro Hirayama, Masaaki Shin, Shoji Kawasaki, Akira Misawa, Akio Fujiwara, Kenji Uchiyama
  • Patent number: 5066727
    Abstract: 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: Grant
    Filed: June 26, 1989
    Date of Patent: November 19, 1991
    Assignee: Mitsui Toatsu Chemicals Incorporated
    Inventors: Hironori Aizawa, Masaaki Shin, Atsuo Okubo
  • Patent number: 5037715
    Abstract: 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: Grant
    Filed: June 11, 1990
    Date of Patent: August 6, 1991
    Assignee: Mitsui Toatsu Chemicals, Inc.
    Inventors: Kazuo Hagiwara, Akira Misawa, Kazuo Hisamatsu, Masaaki Shin
  • Patent number: 5001031
    Abstract: 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: Grant
    Filed: September 14, 1988
    Date of Patent: March 19, 1991
    Assignee: Mitsui Toatsu Chemicals, Incorporated
    Inventors: Takashi Yamamoto, Masaaki Shin
  • Patent number: 4981923
    Abstract: 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: Grant
    Filed: May 31, 1989
    Date of Patent: January 1, 1991
    Assignee: Mitsui Toatsu Chemicals, Inc.
    Inventors: Kazuo Hagiwara, Akira Misawa, Kazuo Hisamatsu, Masaaki Shin
  • Patent number: 4963456
    Abstract: 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: Grant
    Filed: February 22, 1989
    Date of Patent: October 16, 1990
    Assignee: Mitsui Toatsu Chemicals, Incorporated
    Inventors: Masaaki Shin, Nobuhiro Hirayama, Keiichi Ishikawa, Akira Misawa
  • Patent number: 4857433
    Abstract: 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: Grant
    Filed: October 8, 1987
    Date of Patent: August 15, 1989
    Assignee: Mitsui Toatsu Chemicals, Incorporated
    Inventors: Masaaki Shin, Akio Fujiwara, Hiroshi Taniwaki