Patents by Inventor Osamu Hayakawa
Osamu Hayakawa 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: 20180051158Abstract: The present invention is a polymer composition, containing: 30 to 60 volume % of a melt processable fluoropolymer; and 40 to 70 volume % of boron nitride particles; wherein the boron nitride particles are made from particles (A) and particles (B), the particles (A) are spherical aggregate particles with an average particle diameter of 55 ?m to 100 ?m, and an aspect ratio of 1 to 2, the particles (B) are particles with an average particle diameter of 8 ?m to 55 ?m, and the volume ratio of the particles (A) to the total amount of boron nitride is 80 to 99 volume %. The polymer compositions have excellent moldability, insulation properties, heat conductivity, and heat resistance, and are suitable as raw materials for a sufficiently strong molded products, such as thin films.Type: ApplicationFiled: November 19, 2015Publication date: February 22, 2018Inventors: PHAM HOAI NAM, MINEYUKI NODA, KAZUHIKO NAKA, OSAMU HAYAKAWA
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Patent number: 9346936Abstract: Disclosed are injection-moldable fluororesin compositions of melt flowable fluororesin and mesoporous silica. The fluororesin compositions are melt flowable and have a melt flow rate of from 2 to 60 g/10 min. The mesoporous silica has an average pore diameter of from 2 to 50 nm, and the pores of the mesoporous silica are filled with the melt flowable fluororesin. The fluororesin compositions have excellent melt moldability for manufacturing molded products from the fluororesin composition that demonstrate high hardness.Type: GrantFiled: April 14, 2014Date of Patent: May 24, 2016Assignee: THE CHEMOURS COMPANY FC, LLCInventors: Osamu Hayakawa, Noriyuki Suzuki
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Patent number: 9260598Abstract: Described herein are fluororesin compositions of melt processible fluororesin and wholly aromatic polyamide fibers. The wholly aromatic polyamide fibers have an average fiber diameter of 10-20 ?m and an average fiber length of 100-1,000 ?m. The compositions are melt processible and can be melt molded into sliding members having low wear when used with sliding counterparts made of metals such as aluminum, copper, zinc or nickel.Type: GrantFiled: December 26, 2012Date of Patent: February 16, 2016Assignee: THE CHEMOURS COMPANY FC, LLCInventors: Osamu Hayakawa, Noriyuki Suzuki
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Publication number: 20150252242Abstract: Provided is a thermoplastic resin composition having excellent thermal conductivity and high electrical insulating properties, and having excellent flexibility in comparison to ceramic molded bodies and thermoset resin compositions. The resin composition contains 20-60 volume percent of thermoplastic resin and 40-80 volume percent of boron nitride. The boron nitride is made up of spherical boron nitride particles and flat boron nitride particles. The spherical boron nitride particles have average particle size of 50-300 ?m and aspect ratio or 1-2. The flat boron nitride particles have average particle size of 8-100 ?m and aspect ratio of 30-300. The volume ratio of the spherical boron nitride particles with respect to the total amount of boron nitride is 75 vol %-99 vol %. Further provided are melt molded products of this thermoplastic resin composition and a method for the manufacture of such melt molded products.Type: ApplicationFiled: February 24, 2015Publication date: September 10, 2015Inventors: HOAI-NAM PHAM, Mineyuki Noda, Osamu Hayakawa
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Publication number: 20140378615Abstract: Described herein are fluororesin compositions of melt processible fluororesin and wholly aromatic polyamide fibers. The wholly aromatic polyamide fibers have an average fiber diameter of 10-20 ?m and an average fiber length of 100-1,000 ?m. The compositions are melt processible and can be melt molded into sliding members having low wear when used with sliding counterparts made of metals such as aluminum, copper, zinc or nickel.Type: ApplicationFiled: December 26, 2012Publication date: December 25, 2014Inventors: Osamu Hayakawa, Noriyuki Suzuki
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Publication number: 20140309355Abstract: Disclosed are injection-moldable fluororesin compositions of melt flowable fluororesin and mesoporous silica. The fluororesin compositions are melt flowable and have a melt flow rate of from 2 to 60 g/10 min. The mesoporous silica has an average pore diameter of from 2 to 50 nm, and the pores of the mesoporous silica are filled with the melt flowable fluororesin. The fluororesin compositions have excellent melt moldability for manufacturing molded products from the fluororesin composition that demonstrate high hardness.Type: ApplicationFiled: April 14, 2014Publication date: October 16, 2014Inventors: Osamu Hayakawa, Noriyuki Suzuki
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Patent number: 7858188Abstract: A non-stick coating composition comprising diamond particles of relatively large size, i.e., greater than 1 micrometer, preferably greater than 10 micrometers, and a fluoropolymer, can be applied to a substrate. In addition, a structure comprising a substrate and an undercoat is applied to the substrate, where the undercoat comprises a primer layer comprising a heat resistant non-fluoropolymer polymer binder and diamond particles, and optionally a midcoat also comprising diamond particles.Type: GrantFiled: December 8, 2006Date of Patent: December 28, 2010Inventor: Osamu Hayakawa
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Patent number: 7772311Abstract: A composition is provided that is applicable for providing a non-stick abrasion-resistant coating on a surface, but not as a primer layer, said composition comprising fluoropolymer and an effective amount of ceramic particles having an average size of at least about 10 micrometers to improve the abrasion resistance of said coating on said surface by at least 10% as determined by the dry SBAR method, said composition optionally containing adhesion promoter in an amount up to about 10 wt % of the wt. of said fluoropolymer.Type: GrantFiled: March 23, 2007Date of Patent: August 10, 2010Assignee: E.I. du Pont de Nemours and CompanyInventors: Jerome T. Adams, Osamu Hayakawa, Michael J. Witsch
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Patent number: 7695807Abstract: A non-stick coating on a substrate is provided wherein the coating comprises an overcoat and a primer adhering the overcoat to the substrate, the overcoat comprising fluoropolymer and an effective amount of ceramic particles, preferably at least 3 wt % based on the combined weight of the fluoropolymer and the ceramic particles in the overcoat, said ceramic particles having an average particle size of at least about 10 micrometers to increase the abrasion resistance of said coating as determined by the dry SBAR method.Type: GrantFiled: March 23, 2007Date of Patent: April 13, 2010Assignee: E.I. du Pont de Nemours and CompanyInventors: Jerome T. Adams, Osamu Hayakawa, Michael J. Witsch
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Patent number: 7544406Abstract: A functionalized fluoropolymer, preferably with phosphate functionality, can be coated on a metal oxide containing rubber substrate, which coating, after heating, results in a fluoropolymer-rubber substrate laminate without degradation of the rubber, and with good adhesion between the fluoropolymer and the rubber.Type: GrantFiled: July 27, 2005Date of Patent: June 9, 2009Assignee: Dupont-Mitsui Fluorochemicals Co LtdInventors: Osamu Hayakawa, Yuqing Liu, Yuji Mochizuki
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Patent number: 7531113Abstract: The present invention provides an abrasion resistant composition comprising fluoropolymer and an effective amount of micropulp to increase the abrasion resistance of an article such as a film formed from the composition by at least 25% as compared to film formed from the fluoropolymer by itself. In an especially preferred embodiment, the composition also contains an effective amount of pigment to further increase the abrasion resistance of film formed from the composition as compared to film formed from the fluoropolymer by itself. The invention is especially useful for films formed on a fuser roll.Type: GrantFiled: May 26, 2005Date of Patent: May 12, 2009Assignee: E.I. du Pont de Nemours and CompanyInventors: Arnold Frances, Laurence Waino McKeen, Osamu Hayakawa, Arnold Lewis Montgomery Service
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Publication number: 20070231563Abstract: A non-stick coating on a substrate is provided wherein the coating comprises an overcoat and a primer adhering the overcoat to the substrate, the overcoat comprising fluoropolymer and an effective amount of ceramic particles, preferably at least 3 wt % based on the combined weight of the fluoropolymer and the ceramic particles in the overcoat, said ceramic particles having an average particle size of at least about 10 micrometers to increase the abrasion resistance of said coating as determined by the dry SBAR method.Type: ApplicationFiled: March 23, 2007Publication date: October 4, 2007Inventors: Jerome T. Adams, Osamu Hayakawa, Michael J. Witsch
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Publication number: 20070232732Abstract: A composition is provided that is applicable for providing a non-stick abrasion-resistant coating on a surface, but not as a primer layer, said composition comprising fluoropolymer and an effective amount of ceramic particles having an average size of at least about 10 micrometers to improve the abrasion resistance of said coating on said surface by at least 10% as determined by the dry SBAR method, said composition optionally containing adhesion promoter in an amount up to about 10 wt % of the wt. of said fluoropolymer.Type: ApplicationFiled: March 23, 2007Publication date: October 4, 2007Inventors: Jerome T. Adams, Osamu Hayakawa, Michael J. Witsch
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Publication number: 20070134488Abstract: A non-stick coating composition comprising diamond particles of relatively large size, i.e., greater than 1 micrometer, preferably greater than 10 micrometers, and a fluoropolymer, can be applied to a substrate. In addition, a structure comprising a substrate and an undercoat is applied to the substrate, where the undercoat comprises a primer layer comprising a heat resistant non-fluoropolymer polymer binder and diamond particles, and optionally a midcoat also comprising diamond particles.Type: ApplicationFiled: December 8, 2006Publication date: June 14, 2007Inventor: Osamu Hayakawa
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Publication number: 20070026222Abstract: A functionalized fluoropolymer, preferably with phosphate functionality, can be coated on a metal oxide containing rubber substrate, which coating, after heating, results in a fluoropolymer-rubber substrate laminate without degradation of the rubber, and with good adhesion between the fluoropolymer and the rubber.Type: ApplicationFiled: July 27, 2005Publication date: February 1, 2007Inventors: Osamu Hayakawa, Yuqing Liu, Yuji Mochizuki
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Publication number: 20050267260Abstract: The present invention provides an abrasion resistant composition comprising fluoropolymer and an effective amount of micropulp to increase the abrasion resistance of an article such as a film formed from the composition by at least 25% as compared to film formed from the fluoropolymer by itself. In an especially preferred embodiment, the composition also contains an effective amount of pigment to further increase the abrasion resistance of film formed from the composition as compared to film formed from the fluoropolymer by itself. The invention is especially useful for films formed on a fuser roll.Type: ApplicationFiled: May 26, 2005Publication date: December 1, 2005Inventors: Arnold Frances, Laurence McKeen, Osamu Hayakawa, Arnold Service
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Patent number: 4932840Abstract: A control load such as a cylinder or the like is driven at a constant speed by controlling the flow rate of a variable delivery pump. The control mode is switched to the pressure control to keep the stop pressure constant on the basis of an increase in pressure when the control load stops. A remaining delivery amount which will be necessary to raise the delivery pressure to an object stop pressure when the load stops and an excess delivery volume due to the operation time lag when it is assumed that the delivery by the pump is stopped at the present time are predicted. When they coincide, the delivery amount of the pump is set to zero and the control mode is switched to the pressure control. On the other hand, the product of a load volume and a fluid compressibility is calculated from the increase in pressure when the load stops. The feedback gain of the pressure control is controlled on the basis of the calculated value of this product.Type: GrantFiled: September 18, 1989Date of Patent: June 12, 1990Assignee: Tokyo Keiki Company Ltd.Inventors: Kunihiko Takeuchi, Yoshisuke Akita, Osamu Hayakawa
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Patent number: 4930992Abstract: A control load such as a cylinder or the like is driven at a constant speed by controlling the flow rate of a variable delivery pump. The control mode is switched to the pressure control to keep the stop pressure constant on the basis of an increase in pressure when the control load stops. A remaining delivery amount which will be necessary to raise the delivery pressure to an object stop pressure when the load stops and an excess delivery volume due to the operation time lag when it is assumed that the delivery by the pump is stopped at the present time are predicted. When they coincide, the delivery amount of the pump is set to zero and the control mode is switched to the pressure control. On the other hand, the product of a load volume and a fluid compressibility is calculated from the increase in pressure when the load stops. The feedback gain of the pressure control is controlled on the basis of the calculated value of this product.Type: GrantFiled: September 18, 1989Date of Patent: June 5, 1990Assignee: Tokyo Keiki Company Ltd.Inventors: Kunihiko Takeuchi, Yoshisuke Akita, Osamu Hayakawa
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Patent number: 4886422Abstract: A control load such as a cylinder or the like is driven at a constant speed by controlling the flow rate of a variable delivery pump. The control mode is switched to the pressure control to keep the stop pressure constant on the basis of an increase in pressure when the control load stops. A remaining delivery amount which will be necessary to raise the delivery pressure to an object stop pressure when the load stops and an excess delivery volume due to the operation time lag when it is assumed that the delivery by the pump is stopped at the present time are predicted. When they coincide, the delivery amount of the pump is set to zero and the control mode is switched to the pressure control. On the other hand, the product of a load volume and a fluid compressibility is calculated from the increase in pressure when the load stops. The feedback gain of the pressure control is controlled on the basis of the calculated value of this product.Type: GrantFiled: July 7, 1988Date of Patent: December 12, 1989Assignee: Tokyo Keiki Company Ltd.Inventors: Kunihiko Takeuchi, Yoshisuke Akita, Osamu Hayakawa