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公开(公告)号：US20220011491A1
公开(公告)日：2022-01-13
申请号：US17295258
申请日：2019-11-08
Applicant: ZEON CORPORATION
Inventor： Kazuki KUMAZAWA , Hironari SUDEJI
IPC: G02B5/30 , C08F297/04
Abstract: An optical film formed of a resin C including a copolymer P containing a polymerization unit A and a polymerization unit B, wherein the optical film includes a phase separation structure that expresses structural birefringence, the phase separation structure includes a phase containing as a main component the polymerization unit A and a phase containing as a main component the polymerization unit B, and a value of Rth/d calculated from the thickness-direction retardation Rth (nm) and thickness d (nm) is 2.5×10-3 or more.
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公开(公告)号：US20220288820A1
公开(公告)日：2022-09-15
申请号：US17754116
申请日：2020-09-15
Applicant: ZEON CORPORATION
Inventor： Taichi SAWAGUCHI , Hironari SUDEJI
Abstract: Provided is a resin sheet including a plurality of aspheric sections having low variation of thickness precision and high shape precision. A method of producing a resin sheet includes hot press forming a thermoplastic resin film formed using a thermoplastic resin so as to produce a resin sheet including a plurality of aspheric sections that are separated from one another. The hot press forming is performed by increasing the pressing pressure to a final pressing pressure with an average pressure increase rate of 0.1 MPa/s or less at a pressing temperature that is at least 40° C. higher than the glass-transition temperature of the thermoplastic resin.
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公开(公告)号：US20210009744A1
公开(公告)日：2021-01-14
申请号：US16981694
申请日：2019-03-18
Applicant: ZEON CORPORATION
Inventor： Takeshi ASADA , Hironari SUDEJI , Kensaku FUJII , Yusuke YASU , Hiroya NISHIOKA
Abstract: A phase difference film composed of a resin containing a copolymer including polymerization units A and B, the phase difference film including a cylindrical phase separation structure that generates a structural birefringence, the phase separation structure including a phase (A) having the polymerization unit A as a main component and a phase (B) having the polymerization unit B as a main component, and the phase difference film satisfying the following condition (1) or (2). Condition (1): D(A)>D(B) and f(B)>0.5, and a direction giving a maximum refractive index among in-plane directions and an orientation direction of a cylinder in the phase separation structure are parallel to each other. Condition (2): D(A)>D(B) and f(A)>0.5, and a direction giving a maximum refractive index among in-plane directions and an orientation direction of a cylinder in the phase separation structure are orthogonal to each other.
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公开(公告)号：US20220011490A1
公开(公告)日：2022-01-13
申请号：US17294462
申请日：2019-11-08
Applicant: ZEON CORPORATION
Inventor： Kazuki KUMAZAWA , Hironari SUDEJI
Abstract: An optical film formed of a resin C including a copolymer P containing a polymerization unit A and a polymerization unit B, wherein the optical film includes a phase separation structure that expresses structural birefringence, the phase separation structure includes a phase (A) containing as a main component the polymerization unit A and a phase (B) containing as a main component the polymerization unit B, and |n(A)−n(B)| is 0.12 or more.
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公开(公告)号：US20200209452A1
公开(公告)日：2020-07-02
申请号：US16618143
申请日：2018-05-18
Applicant: ZEON CORPORATION
Inventor： Takeshi ASADA , Hironari SUDEJI , Kensaku FUJII
IPC: G02B5/30 , C08F297/02 , C08J5/18 , B29D11/00
Abstract: A phase difference film including an orientation layer formed of a resin C having a negative intrinsic birefringence value, wherein the resin C contains a block copolymer having a block (A) including as a main component a polymerization unit A having a negative intrinsic birefringence value and a block (B) including as a main component a polymerization unit B, and a weight fraction of the block (A) therein being 50% by weight or more and 90% by weight or less, and the phase difference film has an NZ factor of greater than 0 and smaller than 1; and the production method thereof. Preferably, in the orientation layer, the resin C exhibits a phase separation structure, and a distance between phases in the phase separation structure is 200 nm or less.
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Patent Agency Ranking
公开(公告)号：US20230241829A1
公开(公告)日：2023-08-03
申请号：US18171661
申请日：2023-02-21
Applicant: ZEON CORPORATION
Inventor： Takeshi ASADA , Hironari SUDEJI , Kensaku FUJII
IPC: B29C48/305 , B29D11/00 , C08F297/02 , C08J5/18 , G02B5/30 , B29C48/08
CPC classification number: B29C48/305 , B29C48/08 , B29D11/00788 , C08F297/02 , C08J5/18 , G02B5/3083 , B29K2096/04
Abstract: A method for producing a phase difference film is provided. The phase difference film includes an orientation layer formed of a resin C having a negative intrinsic birefringence value. The resin C contains a block copolymer having a block (A) including as a main component a polymerization unit A having a negative intrinsic birefringence value and a block (B) including as a main component a polymerization unit B, and a weight fraction of the block (A) therein being 50% by weight or more and 90% by weight or less. The phase difference film has an NZ factor of greater than 0 and smaller than 1. The method comprising: forming a single layer film of the resin C; and causing phase separation of the resin C in the film, which includes a step of applying to the film a stress along a thickness direction thereof.
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公开(公告)号：US20210364672A1
公开(公告)日：2021-11-25
申请号：US17444595
申请日：2021-08-06
Applicant: ZEON CORPORATION
Inventor： Hironari SUDEJI
Abstract: A multilayer optical film including: an A layer formed of an alicyclic structure-containing polymer resin; and a B layer disposed on at least one surface of the A layer to be in direct contact therewith, the B layer serving as a masking layer, wherein the B layer is a cured product of a material Y including a dispersion of a crosslinkable polymer (a) and solid particles (b), and the B layer has a thickness tB of 10 μm or more and 25 μm or less. A production method including the steps of applying the material Y onto a surface of the A layer, to form a layer of the material Y; and curing the layer of the material Y.
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公开(公告)号：US20210032396A1
公开(公告)日：2021-02-04
申请号：US16981693
申请日：2019-03-18
Applicant: ZEON CORPORATION
Inventor： Takeshi ASADA , Hironari SUDEJI , Kensaku FUJII , Yusuke YASU , Hiroya NISHIOKA
IPC: C08F297/04 , C08J5/18 , B29C55/06 , G02B1/04 , G02B5/30 , B29C48/88 , B29C48/00 , B29K25/00 , B29K96/04 , B29K105/00
Abstract: A phase difference film composed of a resin C containing a copolymer P including a polymerization unit A and a polymerization unit B, the phase difference film including a lamellar phase separation structure that generates a structural birefringence, the phase separation structure including a phase (A) having the polymerization unit A as a main component and a phase (B) having the polymerization unit B as a main component, and the phase difference film satisfying the formulae (1A): f(A)>0.5 and (2):D(A)>D(B), or the formulae (1B): f(B)>0.5 and (2). f(A) represents a total weight ratio of the polymerization unit A in the copolymer P, f(B) represents a total weight ratio of the polymerization unit B in the copolymer P, D(A)=ReA(450)/ReA(550), D(B)=ReB(450)/ReB(550), and ReA(450), ReA(550), ReB(450) and ReB(550) are as defined in the description.
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公开(公告)号：US20240218113A1
公开(公告)日：2024-07-04
申请号：US18262417
申请日：2022-02-22
Applicant: ZEON CORPORATION
Inventor： Satoshi YAMADA , Hironari SUDEJI
CPC classification number: C08G61/08 , G02B1/041 , C08G2261/12 , C08G2261/314 , C08G2261/3324 , C08G2261/418 , C08G2261/724
Abstract: Provided is a resin that can simultaneously achieve a high refractive index, high heat resistance, and low birefringence. A hydrogenated cycloolefin copolymer is obtained through hydrogenation of a cycloolefin copolymer that includes a structural unit derived from 1-naphthylnorbornene and a structural unit derived from 2-naphthylnorbornene, wherein an average endo isomer ratio of the 1-naphthylnorbornene and the 2-naphthylnorbornene is 50 mol % or more. The hydrogenated cycloolefin copolymer is suitable for use as a material of an optical element such as an optical lens.
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公开(公告)号：US20230002544A1
公开(公告)日：2023-01-05
申请号：US17755727
申请日：2020-11-26
Applicant: ZEON CORPORATION
Inventor： Hironari SUDEJI
Abstract: Provided are a cycloolefin polymer simultaneously having a high refractive index, a low Abbe number, and low birefringence and also a method of producing this cycloolefin polymer and an optical element in which this cycloolefin polymer is used. The cycloolefin polymer is a polymer, or hydrogenated product thereof, said polymer comprising a structural unit derived from a naphthyl group-containing alicyclic compound (A) represented by following formula (1), in a specific proportion. In formula (1), one of R2a to R5a is a naphthyl group and remaining groups among R2a to R5a and R1a are as defined in the specification.
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