Patents by Inventor Masahiro Sasagawa
Masahiro Sasagawa 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: 20140285415Abstract: A control signal for controlling a light emitting element is generated according to a set value of an amount of light emission. In this event, each of a current value and a duty ratio of the control signal changes according to the set value of the amount of light emission. Further, it is preferable that each of the current value and the duty ratio changes according to the set value when the set value of the amount of light emission is less than a predetermined threshold value, and the current value changes according to the set value whereas the duty ratio is constant when the set value of the amount of light emission is greater than the predetermined threshold value.Type: ApplicationFiled: March 25, 2014Publication date: September 25, 2014Applicant: Yamaha CorporationInventors: Koji ASADA, Masahiro Sasagawa, Yoshihiro Suzuki
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Patent number: 8138270Abstract: The present invention provides a process for producing a block copolymer in high productivity, by anionic polymerization by use of a lithium initiator, and also to provide the block copolymer and a hydrogenated product thereof, the block copolymer having a conjugated diene block portion with a high vinyl bond content and a vinyl aromatic block portion with a narrow molecular weight distribution and exhibiting a narrow molecular weight distribution and high strength. A conjugated diene monomer and a vinyl aromatic monomer by use of a lithium initiator, are block copolymerized by making a tertiary amine compound and (2) sodium alkoxide coexist, wherein (2)/(1) (a molar ratio)=from 0.01 or more to less than 0.1.Type: GrantFiled: August 16, 2006Date of Patent: March 20, 2012Assignee: Asahi Kasei Chemicals CorporationInventors: Masahiro Sasagawa, Katsunori Nitta
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Patent number: 8043421Abstract: The present invention is directed to a kit for rendering a glass surface water repellent. This invention is particularly directed to a kit for coating a windshield of a vehicle to render the windshield water repellent.Type: GrantFiled: March 12, 2008Date of Patent: October 25, 2011Assignees: E.I. du Pont de Nemours & Company, Soft 99 CorporationInventors: Masahiro Kato, Akinori Tanaka, Masahiro Sasagawa, Hiromitsu Adachi
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Patent number: 7964674Abstract: A hydrogenated copolymer obtained by hydrogenating an unhydrogenated copolymer comprising conjugated diene monomer units and vinyl aromatic monomer units, the hydrogenated copolymer containing at least one hydrogenated copolymer block (B) which is obtained by hydrogenating an unhydrogenated random copolymer block comprised of conjugated diene monomer units and vinyl aromatic monomer units, wherein the hydrogenated copolymer has the following characteristics: the hydrogenated copolymer has a content of the vinyl aromatic monomer units of from more than 40% by weight to less than 95% by weight; at least one peak of loss tangent (tan ?) is observed at ?10 to 80° C. in a dynamic viscoelastic spectrum obtained with respect to the hydrogenated copolymer; and substantially no crystallization peak ascribed to the copolymer block (B) is observed at ?20 to 80° C. in a differential scanning calorimetry (DSC) chart obtained with respect to the hydrogenated copolymer.Type: GrantFiled: April 1, 2008Date of Patent: June 21, 2011Assignee: Asahi Kasei Chemicals CorporationInventors: Masahiro Sasagawa, Toshinori Shiraki, Shigeki Takayama, Shigeru Sasaki, Katsumi Suzuki, Takahiro Hisasue, Kazuo Moritou
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Patent number: 7960481Abstract: A hydrogenated copolymer obtained by hydrogenating an unhydrogenated copolymer comprising conjugated diene monomer units and vinyl aromatic monomer units, the hydrogenated copolymer containing at least one hydrogenated copolymer block (B) which is obtained by hydrogenating an unhydrogenated random copolymer block comprised of conjugated diene monomer units and vinyl aromatic monomer units, wherein the hydrogenated copolymer has the following characteristics: the hydrogenated copolymer has a content of the vinyl aromatic monomer units of from more than 40% by weight to less than 95% by weight; at least one peak of loss tangent (tan ?) is observed at ?10 to 80° C. in a dynamic viscoelastic spectrum obtained with respect to the hydrogenated copolymer; and substantially no crystallization peak ascribed to the copolymer block (B) is observed at ?20 to 80° C. in a differential scanning calorimetry (DSC) chart obtained with respect to the hydrogenated copolymer.Type: GrantFiled: April 1, 2008Date of Patent: June 14, 2011Assignee: Asahi Kasei Chemicals CorporationInventors: Masahiro Sasagawa, Toshinori Shiraki, Shigeki Takayama, Shigeru Sasaki, Katsumi Suzuki, Takahiro Hisasue, Kazuo Moritou
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Publication number: 20110000816Abstract: The present invention is directed to a kit for rendering a glass surface water repellent. This invention is particularly directed to a kit for coating a windshield of a vehicle to render the windshield water repellent.Type: ApplicationFiled: March 12, 2008Publication date: January 6, 2011Applicant: E.I. DU PONT DE NEMOURS AND COMPANY SOFT99 CORPORATIONInventors: Masahiro Kato, Akinori Tanaka, Masahiro Sasagawa, Hiromitsu Adachi
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Patent number: 7807241Abstract: A hydrogenated copolymer-containing laminate comprising a substrate layer, an adhesive layer, and a hydrogenated copolymer composition layer which is laminated on and bonded to the substrate layer through the adhesive layer, the hydrogenated copolymer composition layer comprising a hydrogenated copolymer (I), and a rubbery polymer (II), wherein the hydrogenated copolymer (I) is obtained by hydrogenating a conjugated diene/vinyl aromatic compound copolymer, the hydrogenated copolymer (I) having the following characteristics (1) to (4): (1) a vinyl aromatic monomer unit content of from more than 50% by weight to 90% by weight, (2) a content of a vinyl aromatic polymer block of not more than 40% by weight, (3) a weight average molecular weight of from 50,000 to 1,000,000, and (4) a hydrogenation ratio of 70% or more, as measured with respect to the double bonds in conjugated diene monomer units.Type: GrantFiled: May 14, 2004Date of Patent: October 5, 2010Assignee: Asahi Kasei Chemicals CorporationInventors: Masahiro Sasagawa, Katsumi Suzuki, Toshinori Shiraki, Jae Yeon Lee, Jun Choi Pil, Suk Hun Sur, Dae Shik Kim
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Patent number: 7696267Abstract: An asphalt composition comprising from 0.Type: GrantFiled: March 28, 2007Date of Patent: April 13, 2010Assignee: Asahi Kasei Chemicals CorporationInventors: Masahiro Sasagawa, Toshinori Shiraki, Shigeo Nakajima
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Publication number: 20100016508Abstract: The present invention provides a process for producing a block copolymer in high productivity, by anionic polymerization by use of a lithium initiator, and also to provide the block copolymer and a hydrogenated product thereof, the block copolymer having a conjugated diene block portion with a high vinyl bond content and a vinyl aromatic block portion with a narrow molecular weight distribution and exhibiting a narrow molecular weight distribution and high strength. A conjugated diene monomer and a vinyl aromatic monomer by use of a lithium initiator, are block copolymerized by making a tertiary amine compound and (2) sodium alkoxide coexist, wherein (2)/(1) (a molar ratio)=from 0.01 or more to less than 0.1.Type: ApplicationFiled: August 16, 2006Publication date: January 21, 2010Inventors: Masahiro Sasagawa, Katsunori Nitta
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Publication number: 20080194716Abstract: A hydrogenated copolymer obtained by hydrogenating an unhydrogenated copolymer comprising conjugated diene monomer units and vinyl aromatic monomer units, the hydrogenated copolymer containing at least one hydrogenated copolymer block (B) which is obtained by hydrogenating an unhydrogenated random copolymer block comprised of conjugated diene monomer units and vinyl aromatic monomer units, wherein the hydrogenated copolymer has the following characteristics: the hydrogenated copolymer has a content of the vinyl aromatic monomer units of from more than 40% by weight to less than 95% by weight; at least one peak of loss tangent (tan ?) is observed at ?10 to 80° C. in a dynamic viscoelastic spectrum obtained with respect to the hydrogenated copolymer; and substantially no crystallization peak ascribed to the copolymer block (B) is observed at ?20 to 80° C. in a differential scanning calorimetry (DSC) chart obtained with respect to the hydrogenated copolymer.Type: ApplicationFiled: April 1, 2008Publication date: August 14, 2008Applicant: Asahi Kasei Chemicals CorporationInventors: Masahiro Sasagawa, Toshinori Shiraki, Shigeki Takayama, Shigeru Sasaki, Katsumi Suzuki, Takahiro Hisasue, Kazuo Moritou
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Publication number: 20080188580Abstract: A hydrogenated copolymer obtained by hydrogenating an unhydrogenated copolymer comprising conjugated diene monomer units and vinyl aromatic monomer units, the hydrogenated copolymer containing at least one hydrogenated copolymer block (B) which is obtained by hydrogenating an unhydrogenated random copolymer block comprised of conjugated diene monomer units and vinyl aromatic monomer units, wherein the hydrogenated copolymer has the following characteristics: the hydrogenated copolymer has a content of the vinyl aromatic monomer units of from more than 40% by weight to less than 95% by weight; at least one peak of loss tangent (tan ?) is observed at ?10 to 80° C. in a dynamic viscoelastic spectrum obtained with respect to the hydrogenated copolymer; and substantially no crystallization peak ascribed to the copolymer block (B) is observed at ?20 to 80° C. in a differential scanning calorimetry (DSC) chart obtained with respect to the hydrogenated copolymer.Type: ApplicationFiled: April 1, 2008Publication date: August 7, 2008Applicant: Asahi Kasei Chemicals CorporationInventors: Masahiro Sasagawa, Toshinori Shiraki, Shigeki Takayama, Shigeru Sasaki, Katsumi Suzuki, Takahiro Hisasue, Kazuo Moritou
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Publication number: 20080118750Abstract: A hydrogenated copolymer-containing laminate comprising a substrate layer, an adhesive layer, and a hydrogenated copolymer composition layer which is laminated on and bonded to the substrate layer through the adhesive layer, the hydrogenated copolymer composition layer comprising a hydrogenated copolymer (I), and a rubbery polymer (II), wherein the hydrogenated copolymer (I) is obtained by hydrogenating a conjugated diene/vinyl aromatic compound copolymer, the hydrogenated copolymer (I) having the following characteristics (1) to (4): (1) a vinyl aromatic monomer unit content of from more than 50% by weight to 90% by weight, (2) a content of a vinyl aromatic polymer block of not more than 40% by weight, (3) a weight average molecular weight of from 50,000 to 1,000,000, and (4) a hydrogenation ratio of 70% or more, as measured with respect to the double bonds in conjugated diene monomer units.Type: ApplicationFiled: May 14, 2004Publication date: May 22, 2008Applicant: ASAHI KASEI CHEMICALS CORPORATIONInventors: Masahiro Sasagawa, Katsumi Suzuki, Toshinori Shiraki, Jae Yeon Lee, Jun Choi Pil, Suk Hun Suk, Dae Sik Kim
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Patent number: 7371805Abstract: A hydrogenated copolymer obtained by hydrogenating an unhydrogenated copolymer comprising conjugated diene monomer units and vinyl aromatic monomer units, the hydrogenated copolymer containing at least one hydrogenated copolymer block (B) which is obtained by hydrogenating an unhydrogenated random copolymer block comprised of conjugated diene monomer units and vinyl aromatic monomer units, wherein the hydrogenated copolymer has the following characteristics: the hydrogenated copolymer has a content of the vinyl aromatic monomer units of from more than 40% by weight to less than 95% by weight; at least one peak of loss tangent (tan ?) is observed at ?10 to 80° C. in a dynamic viscoelastic spectrum obtained with respect to the hydrogenated copolymer; and substantially no crystallization peak ascribed to the copolymer block (B) is observed at ?20 to 80° C. in a differential scanning calorimetry (DSC) chart obtained with respect to the hydrogenated copolymer.Type: GrantFiled: June 26, 2003Date of Patent: May 13, 2008Assignee: Asahi Kasei Chemicals CorporationInventors: Masahiro Sasagawa, Toshinori Shiraki, Shigeki Takayama, Shigeru Sasaki, Katsumi Suzuki, Takahiro Hisasue, Kazuo Moritou
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Patent number: 7279532Abstract: A modified hydrogenated copolymer comprising a hydrogenated copolymer and a functional group-containing modifier group bonded to the hydrogenated copolymer, wherein the hydrogenated copolymer is obtained by hydrogenating an unhydrogenated copolymer comprising conjugated diene monomer units and vinyl aromatic monomer units, the unhydrogenated copolymer having at least one polymer block (H) of the vinyl aromatic monomer units, and wherein the modified hydrogenated copolymer has the following characteristics (1) to (4): (1) a content of the vinyl aromatic monomer units of from more than 60% by weight to less than 90% by weight, based on the weight of the hydrogenated copolymer, (2) a content of the polymer block (H) of from 0.1 to 40% by weight, based on the weight of the unhydrogenated copolymer, (3) a weight average molecular weight of from more than 100,000 to 1,000,000, and (4) a hydrogenation ratio of 70% or more, as measured with respect to the double bonds in the conjugated diene monomer units.Type: GrantFiled: February 27, 2003Date of Patent: October 9, 2007Assignee: Asahi Kasei Chemicals CorporationInventors: Masahiro Sasagawa, Shigeki Takayama, Shigeru Sasaki, Takahiro Hisasue, Katsumi Suzuki, Shigeo Nakajima, Toshinori Shiraki
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Publication number: 20070179220Abstract: An asphalt composition comprising from 0.Type: ApplicationFiled: March 28, 2007Publication date: August 2, 2007Inventors: Masahiro Sasagawa, Toshinori Shiraki, Shigeo Nakajima
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Publication number: 20060205890Abstract: A polymer foam having a specific gravity of from 0.05 to 0.5 and comprising a plurality of cells defined by cell walls which constitute a polymer matrix, wherein the polymer matrix is comprised of 5 to 100 parts by weight of (A) a hydrogenated copolymer obtained by hydrogenating an unhydrogenated copolymer which contains at least one copolymer block S comprised of vinyl aromatic monomer units and conjugated diene monomer units, and 95 to 0 part by weight of (B) at least one polymer selected from the group consisting of an olefin polymer and a rubbery polymer, and wherein at least one peak of loss tangent (tan?) is observed at ?40° C. to lower than ?10° C. in a dynamic viscoelastic spectrum obtained with respect to the hydrogenated copolymer (A).Type: ApplicationFiled: April 9, 2004Publication date: September 14, 2006Inventors: Masahiro Sasagawa, Toshinori Shiraki, Chong-Sun Yoo, Jung-Sik Yoon, Kyung-Man Choi, Gi-Yong Um
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Publication number: 20050234193Abstract: A hydrogenated copolymer obtained by hydrogenating an unhydrogenated copolymer comprising conjugated diene monomer units and vinyl aromatic monomer units, the hydrogenated copolymer containing at least one hydrogenated copolymer block (B) which is obtained by hydrogenating an unhydrogenated random copolymer block comprised of conjugated diene monomer units and vinyl aromatic monomer units, wherein the hydrogenated copolymer has the following characteristics: the hydrogenated copolymer has a content of the vinyl aromatic monomer units of from more than 40% by weight to less than 95% by weight; at least one peak of loss tangent (tan 8) is observed at ?10 to 80° C. in a dynamic viscoelastic spectrum obtained with respect to the hydrogenated copolymer; and substantially no crystallization peak ascribed to the copolymer block (B) is observed at ?20 to 80° C. in a differential scanning calorimetry (DSC) chart obtained with respect to the hydrogenated copolymer.Type: ApplicationFiled: June 26, 2004Publication date: October 20, 2005Inventors: Masahiro Sasagawa, Toshinori Shiraki, Shigeki Takayama, Shigeru Sasaki, Katsumi Suzuki, Takahiro Hisasue, Kazuo Moritou
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Publication number: 20050119414Abstract: A modified hydrogenated copolymer comprising a hydrogenated copolymer and a functional group-containing modifier group bonded to the hydrogenated copolymer, wherein the hydrogenated copolymer is obtained by hydrogenating an unhydrogenated copolymer comprising conjugated diene monomer units and vinyl aromatic monomer units, the unhydrogenated copolymer having at least one polymer block (H) of the vinyl aromatic monomer units, and wherein the modified hydrogenated copolymer has the following characteristics (1) to (4): (1) a content of the vinyl aromatic monomer units of from more than 60% by weight to less than 90% by weight, based on the weight of the hydrogenated copolymer, (2) a content of the polymer block (H) of from 0.1 to 40% by weight, based on the weight of the unhydrogenated copolymer, (3) a weight average molecular weight of from more than 100,000 to 1,000,000, and (4) a hydrogenation ratio of 70% or more, as measured with respect to the double bonds in the conjugated diene monomer units.Type: ApplicationFiled: February 27, 2003Publication date: June 2, 2005Inventors: Masahiro Sasagawa, Shigeki Takayama, Shigeru Sasaki, Takahiro Hisasue, Katsumi Suzuki, Shigeo Nakajima, Toshinori Shiraki
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Publication number: 20050107521Abstract: An asphalt composition comprising from 0.Type: ApplicationFiled: October 20, 2004Publication date: May 19, 2005Applicant: ASAHI KASEI CHEMICALS CORPORATIONInventors: Masahiro Sasagawa, Toshinori Shiraki, Shigeo Nakajima
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Patent number: 6875827Abstract: The present invention relates to a hydrogenated polymer which is a hydrogenation product of a conjugated diene polymer having an average vinyl bond content of 20% by weight or more and less than 50% by weight and a weight average molecular weight of 60,000 to 600,000 to a degree such that 85% or more of the residual double bonds in the conjugated diene units are hydrogenated, and which has a molecular weight and a number of terminal methyl group carbons as measured by GPC/FTIR analysis satisfying relationship (1): Va?Vb?0.03Vc??(1) wherein Va, Vb and Vc represent the number of terminal methyl group carbon atoms per 1000 carbon atoms contained in a polymer whose molecular weight is twice the peak top molecular weight, half the peak top molecular weight, and the peak top molecular weight, respectively.Type: GrantFiled: April 5, 2002Date of Patent: April 5, 2005Assignee: Asahi Kasei Kabushiki KaishaInventors: Masahiro Sasagawa, Shinichi Nakajima, Shigeki Takayama, Takasi Sato, Toshinori Shiraki