Patents by Inventor Shigeo Hosokawa
Shigeo Hosokawa 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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Patent number: 5952437Abstract: The present invention relates to a polyurethane having excellent hydrolysis resistance, weatherability, alkali resistance, etc. Said polyurethane is useful as a material for extrusion molding products such as hoses, tubes, films, sheets, belts, and rolls, a material for injection molding products such as packing materials, mechanical parts, and automobile parts, a material for artificial leathers, and coating materials such as paints, etc.Type: GrantFiled: March 12, 1997Date of Patent: September 14, 1999Assignee: Kyowa Hakko Kogyo Co., Ltd.Inventors: Toshio Tadokoro, Shigeru Murata, Shigeo Hosokawa
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Patent number: 5668223Abstract: The present invention relates to a polyurethane having excellent hydrolysis resistance, weatherability, alkali resistance, etc. Said polyurethane is useful as a material for extrusion molding products such as hoses, tubes, films, sheets, belts, and rolls, a material for injection molding products such as packing materials, mechanical parts, and automobile parts, a material for artificial leathers, and coating materials such as paints, etc.Type: GrantFiled: May 20, 1996Date of Patent: September 16, 1997Assignee: Kyowa Hakko Kogyo Co., Ltd.Inventors: Toshio Tadokoro, Shigeru Murata, Shigeo Hosokawa
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Patent number: 5330669Abstract: A polyurethane resin is synthesized from a reaction mixture of at least one phosphorus compound, an epoxy compound, a polyisocyanate, a polyfunctional hydroxy compound, and optionally a chain extender. The polyurethane resin contains one phosphoric acid group or one residual group derived from phosphoric acid per 3,000 to about 200,000 number average molecular weight of the polyurethane resin. The weight average molecular weight of the polyurethane resin is from about 10,000 to about 250,000. A magnetic coating formulation is comprised of principally of magnetic particles and a binder. A magnetic recording media comprises a laminate as in the form of a magnetic layer composed principally of magnetic particles and a binder wherein at least a portion of the binder is the polyurethane resin. The substrate of the magnetic recording medium is a suitable polymer such as polyester, and the like.Type: GrantFiled: March 31, 1993Date of Patent: July 19, 1994Assignees: Kyowa Hakko Kogyo Co., Ltd., The B. F. Goodrich CompanyInventors: Masahiko Yasuda, Shigeo Hosokawa, Yorozu Yokomori, Shinichiro Jimbo, Edmond G. Kolycheck
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Patent number: 5292853Abstract: A polyurethane resin is synthesized from a reaction mixture of at least one phosphorus compound, an epoxy compound, a polyisocyanate, a polyfunctional hydroxy compound, and optionally a chain extender. The polyurethane resin contains one phosphoric acid group or one residual group derived from phosphoric acid per 3,000 to about 200,000 number average molecular weight of the polyurethane resin. The weight average molecular weight of the polyurethane resin is from about 10,000 to about 250,000. A magnetic coating formulation is comprised of principally of magnetic particles and a binder. A magnetic recording media comprises a laminate as in the form of a magnetic layer composed principally of magnetic particles and a binder wherein at least a portion of the binder is the polyurethane resin. The substrate of the magnetic recording medium is a suitable polymer such as polyester, and the like.Type: GrantFiled: August 5, 1991Date of Patent: March 8, 1994Assignees: Kyowa Hakko Kogyo Co., Ltd., The B.F. Goodrich CompanyInventors: Masahiko Yasuda, Shigeo Hosokawa, Yorozu Yokomori, Shinichiro Jimbo, Edmond G. Kolycheck
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Patent number: 5273826Abstract: A polyurethane resin is synthesized from a reaction mixture of at least one phosphorus compound, an epoxy compound, a polyisocyanate, a polyfunctional hydroxy compound, and optionally a chain extender. The polyurethane resin contains one phosphoric acid group or one residual group derived from phosphoric acid per 3,000 to about 200,000 number average molecular weight of the polyurethane resin. The weight average molecular weight of the polyurethane resin is from about 10,000 to about 250,000. A magnetic coating formulation is comprised of principally of magnetic particles and a binder. A magnetic recording media comprises a laminate as in the form of a magnetic layer composed principally of magnetic particles and a binder wherein at least a portion of the binder is the polyurethane resin. The substrate of the magnetic recording medium is a suitable polymer such as polyester, and the like.Type: GrantFiled: March 31, 1993Date of Patent: December 28, 1993Assignee: The B. F. Goodrich CompanyInventors: Masahiko Yasuda, Shigeo Hosokawa, Yorozu Yokomori, Shinichiro Jimbo, Edmond G. Kolycheck
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Patent number: 5162162Abstract: A magnetic coating formulation is composed principally of magnetic particles and a binder. At least a portion of the binder is a polyurethane resin synthesized from a reactant mixture of specific phosphorus compound, epoxy compound, isocyanate compound and polyfunctional hydroxy compounds. The reactant mixture may optionally contain a chain extender. The polyurethane resin contains one phosphoric acid group or one residual group derived from phosphoric acid per 3,000-200,000 number average molecular weight of the polyurethane resin, and has a number average molecular weight of 4,000-150,000. A magnetic recording medium with a magnetic coating layer formed from the magnetic coating formulation is also disclosed. The magnetic coating layer features not only excellent dispersion of magnetic particles, in other words, excellent magnetic characteristics but also superb durability.Type: GrantFiled: May 9, 1991Date of Patent: November 10, 1992Assignee: The B. F. Goodrich CompanyInventors: Masahiko Yasuda, Shigeo Hosokawa, Yorozu Yokomori, Shinichiro Jimbo
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Patent number: 5158830Abstract: A magnetic coating formulation is composed principally of magnetic particles and a binder. At least a portion of the binder is a polyurethane resin synthesized from a reactant mixture of specific phosphorus compound, epoxy compound, isocyanate compound and polyfunctional hydroxy compounds. The reactant mixture may optionally contain a chain extender. The polyurethane resin contains one phosphoric acid group or one residual group derived from phosphoric acid per 3,000-200,000 number average molecular weight of the polyurethane resin, and has a number average molecular weight of 4,000-150,000. A magnetic recording medium with a magnetic coating layer formed from the magnetic coating formulation is also disclosed. The magnetic coating layer features not only excellent dispersion of magnetic particles, in other words, excellent magnetic characteristics but also superb durability.Type: GrantFiled: May 9, 1991Date of Patent: October 27, 1992Assignee: The B. F. Goodrich CompanyInventors: Masahiko Yasuda, Shigeo Hosokawa, Yorozu Yokomori, Shinichiro Jimbo
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Patent number: 5142001Abstract: This invention pertains to the polyurethane composition with hydrophilicity and hydrolysis resistance. The purpose of this invention is achieved by:1) A polyurethane molecule containing at least one acidic hydrophilic group in the molecule which is neutralized with piperidine derivatives and piperazinone derivatives, or2) A mixture containing polyurethane and compounds(s) having at least one acidic hydrophilic group which is neutralized with piperidine derivatives and piperazinone derivatives.The invention polyurethane compositions which have excellent hydrolysis resistance and rupture strength are useful for adhesives, paints, and bonding agents for magnetic recording media.Type: GrantFiled: August 5, 1991Date of Patent: August 25, 1992Assignees: Kyowa Hakko Kogyo Co., Ltd., The B. F. Goodrich CompanyInventors: Masahiko Yasuda, Shigeo Hosokawa, Yorozu Yokomori, Yukiyoshi Ito, Koji Hisamura
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Patent number: 5037934Abstract: A magnetic coating formulation is composed principally of magnetic particles and a binder. At least a portion of the binder is a polyurethane resin synthesized from a reactant mixture of specific phosphorus compound, epoxy compound, isocyanate compound and polyfunctional hydroxy compounds. The reactant mixture may optionally contain a chain extender. The polyurethane resin contains one phosphoric acid group or one residual group derived from phosphoric acid per 3,000-200,000 number average molecular weight of the polyurethane resin, and has a number average molecular weight of 4,000-150,000. A magnetic recording medium with a magnetic coating layer formed from the magnetic coating formulation is also disclosed. The magnetic coating layer features not only excellent dispersion of magnetic particles, in other words, excellent magnetic characteristics but also superb durability.Type: GrantFiled: October 24, 1989Date of Patent: August 6, 1991Assignees: Kyowa Hakko Kogyo Co., Ltd., B. F. Goodrich CompanyInventors: Masahiko Yasuda, Shigeo Hosokawa, Yorozu Yokomori, Shinichiro Jimbo