Patents by Inventor Kiyofumi Toyama
Kiyofumi Toyama 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: 8450405Abstract: The invention provides an interlayer film for a laminated glass and a laminated glass, which are protected against a slump in TL value through attenuation of said coincidence effect and adapted to display an outstanding sound insulation performance over a broad temperature range. An interlayer film for a laminated glass comprising a plasticizer and a polyacetal resin, which is a blend of a polyacetal resin having an average polymerization degree of 1,000 to 3,000 and a polyacetal resin having an average polymerization degree of 3,000 to 5,000, and which has an acetalization degree of 60 to 85 mol % and an acetyl group content of 8 to 30 mol %. An interlayer film for a laminated glass which shows a temperature dependence of loss tangent in which the lowest-temperature side maximum of loss tangent appears at 30° C. or lower when examined for dynamic viscoelasticity.Type: GrantFiled: August 27, 2012Date of Patent: May 28, 2013Assignee: Sekisui Chemical Co., Ltd.Inventors: Kiyofumi Toyama, Yoshio Aoshima, Chikao Shimizu
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Publication number: 20120325396Abstract: The invention provides an interlayer film for a laminated glass and a laminated glass, which are protected against a slump in TL value through attenuation of said coincidence effect and adapted to display an outstanding sound insulation performance over a broad temperature range. An interlayer film for a laminated glass comprising a plasticizer and a polyacetal resin, which is a blend of a polyacetal resin having an average polymerization degree of 1,000 to 3,000 and a polyacetal resin having an average polymerization degree of 3,000 to 5,000, and which has an acetalization degree of 60 to 85 mol % and an acetyl group content of 8 to 30 mol %. An interlayer film for a laminated glass which shows a temperature dependence of loss tangent in which the lowest-temperature side maximum of loss tangent appears at 30° C. or lower when examined for dynamic viscoelasticity.Type: ApplicationFiled: August 27, 2012Publication date: December 27, 2012Applicant: Sekisui Chemical Co., Ltd.Inventors: Kiyofumi Toyama, Yoshio Aoshima, Chikao Shimizu
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Patent number: 8278379Abstract: The invention provides an interlayer film for a laminated glass and a laminated glass, which are protected against a slump in TL value through attenuation of said coincidence effect and adapted to display an outstanding sound insulation performance over a broad temperature range. An interlayer film for a laminated glass comprising a plasticizer and a polyacetal resin, which is a blend of a polyacetal resin having an average polymerization degree of 1,000 to 3,000 and a polyacetal resin having an average polymerization degree of 3,000 to 5,000, and which has an acetalization degree of 60 to 85 mol % and an acetyl group content of 8 to 30 mol %. An interlayer film for a laminated glass which shows a temperature dependence of loss tangent in which the lowest-temperature side maximum of loss tangent appears at 30° C. or lower when examined for dynamic viscoelasticity.Type: GrantFiled: September 16, 2011Date of Patent: October 2, 2012Assignee: Sekisui Chemical Co., Ltd.Inventors: Kiyofumi Toyama, Yoshio Aoshima, Chikao Shimizu
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Publication number: 20120003482Abstract: The invention provides an interlayer film for a laminated glass and a laminated glass, which are protected against a slump in TL value through attenuation of said coincidence effect and adapted to display an outstanding sound insulation performance over a broad temperature range. An interlayer film for a laminated glass comprising a plasticizer and a polyacetal resin, which is a blend of a polyacetal resin having an average polymerization degree of 1,000 to 3,000 and a polyacetal resin having an average polymerization degree of 3,000 to 5,000, and which has an acetalization degree of 60 to 85 mol % and an acetyl group content of 8 to 30 mol %. An interlayer film for a laminated glass which shows a temperature dependence of loss tangent in which the lowest-temperature side maximum of loss tangent appears at 30° C. or lower when examined for dynamic viscoelasticity.Type: ApplicationFiled: September 16, 2011Publication date: January 5, 2012Applicant: Sekisui Chemical Co., Ltd.Inventors: Kiyofumi Toyama, Yoshio Aoshima, Chikao Shimizu
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Patent number: 8039536Abstract: The invention provides an interlayer film for a laminated glass and a laminated glass, which are protected against a slump in TL value through attenuation of said coincidence effect and adapted to display an outstanding sound insulation performance over a broad temperature range. An interlayer film for a laminated glass comprising a plasticizer and a polyacetal resin, which is a blend of a polyacetal resin having an average polymerization degree of 1,000 to 3,000 and a polyacetal resin having an average polymerization degree of 3,000 to 5,000, and which has an acetalization degree of 60 to 85 mol % and an acetyl group content of 8 to 30 mol %. An interlayer film for a laminated glass which shows a temperature dependence of loss tangent in which the lowest-temperature side maximum of loss tangent appears at 30° C. or lower when examined for dynamic viscoelasticity.Type: GrantFiled: November 19, 2010Date of Patent: October 18, 2011Assignee: Sekisui Chemical Co., Ltd.Inventors: Kiyofumi Toyama, Yoshio Aoshima, Chikao Shimizu
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Publication number: 20110064957Abstract: The invention provides an interlayer film for a laminated glass and a laminated glass, which are protected against a slump in TL value through attenuation of said coincidence effect and adapted to display an outstanding sound insulation performance over a broad temperature range. An interlayer film for a laminated glass comprising a plasticizer and a polyacetal resin, which is a blend of a polyacetal resin having an average polymerization degree of 1,000 to 3,000 and a polyacetal resin having an average polymerization degree of 3,000 to 5,000, and which has an acetalization degree of 60 to 85 mol % and an acetyl group content of 8 to 30 mol %. An interlayer film for a laminated glass which shows a temperature dependence of loss tangent in which the lowest-temperature side maximum of loss tangent appears at 30° C. or lower when examined for dynamic viscoelasticity.Type: ApplicationFiled: November 19, 2010Publication date: March 17, 2011Applicant: Sekisui Chemical Co., Ltd.Inventors: Kiyofumi Toyama, Yoshio Aoshima, Chikao Shimizu
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Patent number: 7858683Abstract: The invention provides an interlayer film for a laminated glass and a laminated glass, which are protected against a slump in TL value through attenuation of said coincidence effect and adapted to display an outstanding sound insulation performance over a broad temperature range. An interlayer film for a laminated glass comprising a plasticizer and a polyacetal resin, which is a blend of a polyacetal resin having an average polymerization degree of 1,000 to 3,000 and a polyacetal resin having an average polymerization degree of 3,000 to 5,000, and which has an acetalization degree of 60 to 85 mol % and an acetyl group content of 8 to 30 mol %. An interlayer film for a laminated glass which shows a temperature dependence of loss tangent in which the lowest-temperature side maximum of loss tangent appears at 30° C. or lower when examined for dynamic viscoelasticity.Type: GrantFiled: December 28, 2006Date of Patent: December 28, 2010Assignee: Sekisui Chemical Co., Ltd.Inventors: Kiyofumi Toyama, Yoshio Aoshima, Chikao Shimizu
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Patent number: 7468209Abstract: The invention provides an interlayer film for a laminated glass and a laminated glass, which are protected against a slump in TL value through attenuation of said coincidence effect and adapted to display an outstanding sound insulation performance over a broad temperature range. An interlayer film for a laminated glass comprising a plasticizer and a polyacetal resin, which is a blend of a polyacetal resin having an average polymerization degree of 1,000 to 3,000 and a polyacetal resin having an average polymerization degree of 3,000 to 5,000, and which has an acetalization degree of 60 to 85 mol % and an acetyl group content of 8 to 30 mol %. An interlayer film for a laminated glass which shows a temperature dependence of loss tangent in which the lowest-temperature side maximum of loss tangent appears at 30° C. or lower when examined for dynamic viscoelasticity.Type: GrantFiled: October 9, 2007Date of Patent: December 23, 2008Assignee: Sekisui Chemical Co., Ltd.Inventors: Kiyofumi Toyama, Yoshio Aoshima, Chikao Shimizu
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Publication number: 20080032138Abstract: The invention provides an interlayer film for a laminated glass and a laminated glass, which are protected against a slump in TL value through attenuation of said coincidence effect and adapted to display an outstanding sound insulation performance over a broad temperature range. An interlayer film for a laminated glass comprising a plasticizer and a polyacetal resin, which is a blend of a polyacetal resin having an average polymerization degree of 1,000 to 3,000 and a polyacetal resin having an average polymerization degree of 3,000 to 5,000, and which has an acetalization degree of 60 to 85 mol % and an acetyl group content of 8 to 30 mol %. An interlayer film for a laminated glass which shows a temperature dependence of loss tangent in which the lowest-temperature side maximum of loss tangent appears at 30° C. or lower when examined for dynamic viscoelasticity.Type: ApplicationFiled: October 9, 2007Publication date: February 7, 2008Inventors: Kiyofumi Toyama, Yoshio Aoshima, Chikao Shimizu
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Publication number: 20070093581Abstract: The invention provides an interlayer film for a laminated glass and a laminated glass, which are protected against a slump in TL value through attenuation of said coincidence effect and adapted to display an outstanding sound insulation performance over a broad temperature range. An interlayer film for a laminated glass comprising a plasticizer and a polyacetal resin, which is a blend of a polyacetal resin having an average polymerization degree of 1,000 to 3,000 and a polyacetal resin having an average polymerization degree of 3,000 to 5,000, and which has an acetalization degree of 60 to 85 mol % and an acetyl group content of 8 to 30 mol %. An interlayer film for a laminated glass which shows a temperature dependence of loss tangent in which the lowest-temperature side maximum of loss tangent appears at 30° C. or lower when examined for dynamic viscoelasticity.Type: ApplicationFiled: December 28, 2006Publication date: April 26, 2007Inventors: Kiyofumi Toyama, Yoshio Aoshima, Chikao Shimizu
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Patent number: 7074487Abstract: The present invention has it for its object to provide an interlayer film for laminated glass and a laminated glass which shows a much decreased extent of blushing of the peripheral region thereof even when placed in a high-humidity atmosphere, without compromise in those fundamental performance characteristics which are required of laminated glass, such as transparency, weather resistance, adhesion and penetration resistance. The present invention is related to an interlayer film for laminated glass comprising a plasticized poly(vinyl acetal) resin and having the haze after 24 hours of immersion is not more than 50% when said interlayer film with a thickness of 0.3 to 0.8 mm is immersed in water at 23° C.Type: GrantFiled: March 28, 2002Date of Patent: July 11, 2006Assignee: Sekisui Chemical Co., Ltd.Inventors: Tokushige Shichiri, Jiro Miyai, Akihiko Bando, Kiyofumi Toyama, Yoshio Aoshima, Isei Sannomiya, Minoru Nakajima
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Publication number: 20050196625Abstract: The invention provides an interlayer film for a laminated glass and a laminated glass, which are protected against a slump in TL value through attenuation of said coincidence effect and adapted to display an outstanding sound insulation performance over a broad temperature range. An interlayer film for a laminated glass comprising a plasticizer and a polyacetal resin, which is a blend of a polyacetal resin having an average polymerization degree of 1,000 to 3,000 and a polyacetal resin having an average polymerization degree of 3,000 to 5,000, and which has an acetalization degree of 60 to 85 mol % and an acetyl group content of 8 to 30 mol %. An interlayer film for a laminated glass which shows a temperature dependence of loss tangent in which the lowest-temperature side maximum of loss tangent appears at 30° C. or lower when examined for dynamic viscoelasticity.Type: ApplicationFiled: April 25, 2005Publication date: September 8, 2005Inventors: Kiyofumi Toyama, Yoshio Aoshima, Chikao Shimizu
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Patent number: 6903152Abstract: The invention provides an interlayer film for a laminated glass and a laminated glass, which are protected against a slump in TL value through attenuation of said coincidence effect and adapted to display an outstanding sound insulation performance over a broad temperature range. An interlayer film for a laminated glass comprising a plasticizer and a polyacetal resin, which is a blend of a polyacetal resin having an average polymerization degree of 1,000 to 3,000 and a polyacetal resin having an average polymerization degree of 3,000 to 5,000, and which has an acetalization degree of 60 to 85 mol % and an acetyl group content of 8 to 30 mol %. An interlayer film for a laminated glass which shows a temperature dependence of loss tangent in which the lowest-temperature side maximum of loss tangent appears at 30° C. or lower when examined for dynamic viscoelasticity.Type: GrantFiled: March 2, 2001Date of Patent: June 7, 2005Assignee: Sekisui Chemical Co., Ltd.Inventors: Kiyofumi Toyama, Yoshio Aoshima, Chikao Shimizu
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Publication number: 20030139520Abstract: The invention provides an interlayer film for a laminated glass and a laminated glass,Type: ApplicationFiled: November 5, 2002Publication date: July 24, 2003Inventors: Kiyofumi Toyama, Yoshio Aoshima, Chikao Shimizu
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Publication number: 20020150764Abstract: The present invention has it for its object to provide an interlayer film for laminated glass and a laminated glass which shows a much decreased extent of blushing of the peripheral region thereof even when placed in a high-humidity atmosphere, without compromise in those fundamental performance characteristics which are required of laminated glass, such as transparency, weather resistance, adhesion and penetration resistance.Type: ApplicationFiled: March 28, 2002Publication date: October 17, 2002Inventors: Tokushige Shichiri, Jiro Miyai, Akihiko Bando, Kiyofumi Toyama, Yoshiro Aoshima, Isei Sannomiya, Minoru Nakajima
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Patent number: 6387516Abstract: The present invention has it for its object to provide an interlayer film for laminated glass and a laminated glass which shows a much decreased extent of blushing of the peripheral region thereof even when placed in a high-humidity atmosphere, without compromise in those fundamental performance characteristics which are required of laminated glass, such as transparency, weather resistance, adhesion and penetration resistance. The present invention is related to an interlayer film for laminated glass comprising a plasticized poly(vinyl acetal) resin and having the haze after 24 hours of immersion is not more than 50% when said interlayer film with a thickness of 0.3 to 0.8 mm is immersed in water at 23° C.Type: GrantFiled: May 14, 1999Date of Patent: May 14, 2002Assignee: Sekisui Chemical Co., Ltd.Inventors: Tokushige Shichiri, Jiro Miyai, Akihiko Bando, Kiyofumi Toyama, Yoshio Aoshima, Isei Sannomiya, Minoru Nakajima
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Publication number: 20020006508Abstract: The present invention has it for its object to provide an interlayer film for laminated glass and a laminated glass which shows a much decreased extent of blushing of the peripheral region thereof even when placed in a high-humidity atmosphere, without compromise in those fundamental performance characteristics which are required of laminated glass, such as transparency, weather resistance, adhesion and penetration resistance.Type: ApplicationFiled: May 14, 1999Publication date: January 17, 2002Inventors: TOKUSHIGE SHICHIRI, JIRO MIYAI, AKIHIKO BANDO, KIYOFUMI TOYAMA, YOSHIO AOSHIMA, ISEI SANNOMIYA, MINORU NAKAJIMA