Patents by Inventor Takayuki Kanada
Takayuki Kanada 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: 20240043619Abstract: Problem: The invention provides a polyimide precursor as well as a resin composition thereof that is excellent in coating properties of slit coating as well as productivity and also excellent in optical properties that are required for applications of flexible substrates. Solution: The polyimide precursor comprises a structure unit derived from a fluorene backbone and a silicon-containing structure unit, and a weight-average molecular weight of the polyimide precursor is 90,000 to 250,000.Type: ApplicationFiled: October 5, 2023Publication date: February 8, 2024Applicant: ASAHI KASEI KABUSHIKI KAISHAInventors: Takayuki KANADA, Masaki MAITANI, Toshiaki OKUDA
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Patent number: 10711105Abstract: This resin composition is characterized by comprising (a) 100 parts by mass of a polyimide precursor containing a structural unit represent by general formula (1) (wherein, R1 and R2 are each independently selected from a hydrogen atom, monovalent aliphatic hydrocarbons having 1-20 carbon atoms, and aromatic groups, and X1 is a tetravalent organic group having 4-32 carbon atoms), (b) 0.001-5 parts by mass of a silicone-based surfactant, and (c) an organic solvent.Type: GrantFiled: March 8, 2016Date of Patent: July 14, 2020Assignee: ASAHI KASEI KABUSHIKI KAISHAInventors: Yoshiki Miyamoto, Yasuhito Iizuka, Masaki Maitani, Takayuki Kanada
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Publication number: 20200002476Abstract: Problem: The invention provides a polyimide precursor as well as a resin composition thereof that is excellent in coating properties of slit coating as well as productivity and also excellent in optical properties that are required for applications of flexible substrates. Solution: The polyimide precursor comprises a structure unit derived from a fluorene backbone and a silicon-containing structure unit, and a weight-average molecular weight of the polyimide precursor is 90,000 to 250,000.Type: ApplicationFiled: June 21, 2019Publication date: January 2, 2020Applicant: ASAHI KASEI KABUSHIKI KAISHAInventors: Takayuki KANADA, Masaki MAITANI, Toshiaki OKUDA
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Publication number: 20190352463Abstract: A solvent for a resin composition that includes a polyimide precursor having a structure unit derived from polyamic acid and a structure unit derived from siloxane having a monovalent aliphatic hydrocarbon group of 1 to 5 carbon atoms or a monovalent aromatic group of 6 to 10 carbon atoms. The solvent is a mixture of an amide-based solvent and a non-amide-based solvent having a boiling point of 160° C. or higher, and the resin composition includes cyclic siloxane.Type: ApplicationFiled: May 9, 2019Publication date: November 21, 2019Applicant: ASAHI KASEI KABUSHIKI KAISHAInventors: Masaki MAITANI, Toshiaki OKUDA, Takayuki KANADA
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Publication number: 20180037698Abstract: This resin composition is characterized by comprising (a) 100 parts by mass of a polyimide precursor containing a structural unit represent by general formula (1) (wherein, R1 and R2 are each independently selected from a hydrogen atom, monovalent aliphatic hydrocarbons having 1-20 carbon atoms, and aromatic groups, and X1 is a tetravalent organic group having 4-32 carbon atoms), (b) 0.001-5 parts by mass of a silicone-based surfactant, and (c) an organic solvent.Type: ApplicationFiled: March 8, 2016Publication date: February 8, 2018Applicant: ASAHI KASEI KABUSHIKI KAISHAInventors: Yoshiki MIYAMOTO, Yasuhito IIZUKA, Masaki MAITANI, Takayuki KANADA
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Publication number: 20170165879Abstract: Provided is a resin composition including a polyimide precursor that has exceptional adhesiveness to glass substrates and that does not generate particles during laser detachment. A resin composition containing (a) a polyimide precursor, (b) an organic solvent, and (d) an alkoxysilane compound, wherein the resin composition shows polyimide obtained by imidation of the (a) polyimide precursor after application of the resin composition to the surface of a support, the residual stress with the support is from ?5 MPa to 10 MPa, and the 308 nm absorbance of the (d) alkoxysilane compound when made into a 0.001 mass % NMP solution is from 0.1 to 0.5 at a solution thickness of 1 cm.Type: ApplicationFiled: July 13, 2015Publication date: June 15, 2017Applicant: ASAHI KASEI KABUSHIKI KAISHAInventors: Yoshiki MIYAMOTO, Toshiaki OKUDA, Masaki MAITANI, Yasuhito IIZUKA, Takayuki KANADA
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Publication number: 20090267239Abstract: A photosensitive resin composition comprising parts by mass of polycondensate (A) having a structure resulting from dehydration condensation between one or two or more tetracarboxylic acid dianhydride and one or two or more armatic diamines having mutually ortho-positioned amino and phenolic hydroxyl groups and 1 to 100 parts by mass of photosensitive diazonaphthoquinone compound (B), wherein the polycondensate (A) has a weight average molecular weight of 3000 to 70,000.Type: ApplicationFiled: September 1, 2006Publication date: October 29, 2009Applicants: ASAHI KASEI EMD CORPORATION, PI R&D CO., LTD.Inventors: Takayuki Kanada, Hiroyuki Hanahata, Xingzhou Jin, Shuzo Waki
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Patent number: 7563557Abstract: A polyamide having a structure represented by the chemical formula (1): wherein m and n represent an integer satisfying m?1, n?1, 2?(m+n)?150, 0.3?m/(m+n)?0.9, R1 and R2 represent at least one monovalent organic group containing a photopolymerizable unsaturated bond, X1 represents at least one tetravalent aromatic group, X2 represents at least one trivalent aromatic group, Y1 and Y2 represent at least one divalent organic group, and Z represents at least one monovalent organic group selected from mono-substituted amino and imido groups.Type: GrantFiled: July 11, 2005Date of Patent: July 21, 2009Assignee: Asahi Kasei EMD CorporationInventors: Masashi Kimura, Takayuki Kanada, Hiroyuki Hanahata
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Patent number: 7416822Abstract: Disclosed is a hydroxy polyamide represented by the following general formula (1) and having a 5-amino isophthalic acid derivative structure in the main chain structure. (1) (In the formula, m and n represent integers, X represents at least one tetravalent organic group, Y represents at least one divalent organic group having a 5-amino isophthalic acid derivative structure, and Z represents at least one divalent organic group).Type: GrantFiled: January 18, 2005Date of Patent: August 26, 2008Assignee: Asahi Kasei EMD CorporationInventors: Takayuki Kanada, Yasuhiro Kataoka, Motohiro Niwa
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Publication number: 20070248910Abstract: A polyamide having a structure represented by the chemical formula (1): wherein m and n represent an integer satisfying m?1, n?1, 2?(m+n)?150, 0.3?m/(m+n)?0.9, R1 and R2 represent at least one monovalent organic group containing a photopolymerizable unsaturated bond, X1 represents at least one tetravalent aromatic group, X2 represents at least one trivalent aromatic group, Y1 and Y2 represent at least one divalent organic group, and Z represents at least one monovalent organic group selected from mono-substituted amino and imido groups.Type: ApplicationFiled: July 11, 2005Publication date: October 25, 2007Applicant: ASAHI KASEI EMD CORPORATIONInventors: Masashi Kimura, Takayuki Kanada, Hiroyuki Hanahata
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Publication number: 20070154843Abstract: Disclosed is a hydroxy polyamide represented by the following general formula (1) and having a 5-amino isophthalic acid derivative structure in the main chain structure. (1) (In the formula, m and n represent integers, X represents at least one tetravalent organic group, Y represents at least one divalent organic group having a 5-amino isophthalic acid derivative structure, and Z represents at least one divalent organic group.Type: ApplicationFiled: January 18, 2005Publication date: July 5, 2007Applicant: ASAHI KASEI EMD CORPORATIONInventors: Takayuki Kanada, Yasuhiro Kataoka, Motohiro Niwa