公开(公告)号：US10988607B2

公开(公告)日：2021-04-27

申请号：US16085918

申请日：2017-02-22

Applicant: DAICEL CORPORATION

Inventor： Kouichi Umemoto ,  Takahiro Sakakibara

IPC: C08K3/36 ,  C08L33/06 ,  G02B1/14 ,  C08K9/06 ,  C08F292/00 ,  C08K3/04 ,  C08K3/08 ,  C08K5/5419 ,  C08K7/26 ,  C08F222/10 ,  C08F230/08 ,  C08K3/22

Abstract: A resin composition (X), which is a curable resin composition according to the present invention, contains a curable resin component (10), a surface-modified nanodiamond (20), and an organic medium. The surface-modified nanodiamond (20) includes a ND particle (21), which is a nanodiamond particle, and a silane coupling agent (22). The silane coupling agent (22) has a (meth)acryloyl-containing organic chain and is bonded to the ND particle (21). The resin composition (X) is suitable for forming a nanodiamond-dispersed cured resin portion having both high transparency and high scratch resistance. An optical element according to the present invention has a light-transmitting region and includes a cured resin portion, which is a cured product of the resin composition (X), in at least part of the light-transmitting region. The optical element is advantageous for actually providing an optical element including a cured resin portion or cured resin layer having both high transparency and high scratch resistance.

公开(公告)号：US10072108B2

公开(公告)日：2018-09-11

申请号：US15312983

申请日：2015-04-20

Applicant: Daicel Corporation

Inventor： Takayuki Yaegashi ,  Keiichi Osano ,  Yoshimichi Okano ,  Kouichi Umemoto ,  Takeshi Yagi

IPC: C08F210/00 ,  C08F232/00 ,  C08F232/04 ,  C08J5/18 ,  C08F210/04 ,  C08F210/14

CPC classification number: C08F210/00 ,  C08F210/04 ,  C08F210/14 ,  C08F232/00 ,  C08F2420/02 ,  C08F2420/04 ,  C08J5/18 ,  C08J2323/20 ,  C08F232/08 ,  C08F2500/02 ,  C08F2500/26 ,  C08F4/6592

Abstract: Provided is a film, sheet, plate, or other such formed article having excellent transparency made of a copolymer obtained from a cyclic olefin monomer and an α-olefin monomer. The present invention provides a formed article made from a copolymer having Tg of 170° C. or higher and an Al content of 50 ppm or less that is a copolymer including a structural unit of a cyclic olefin monomer (A) derived from norbornene and a structural unit of a monomer (B) derived from at least one C4-C12 α-olefin.

公开(公告)号：US11939222B2

公开(公告)日：2024-03-26

申请号：US16965418

申请日：2019-01-15

Applicant: DAICEL CORPORATION

Inventor： Kouichi Umemoto ,  Hidekazu Takeuchi

IPC: C01B32/28 ,  B82Y30/00 ,  B82Y40/00 ,  C09C1/44 ,  C09C3/12

CPC classification number: C01B32/28 ,  C09C1/44 ,  C09C3/12 ,  B82Y30/00 ,  B82Y40/00 ,  C01P2004/64

Abstract: A nanodiamond particle dispersion including nanodiamond particles highly dispersed in an organic solvent is provided. A nanodiamond particle dispersion of the present invention includes nanodiamond particles dispersed in an organic solvent, in which the nanodiamond particles have a silane compound (excluding a silane compound having a (meth)acryloyl group) bonded to a surface of the nanodiamond particles, the organic solvent has an SP value from 8.0 to 14.0 (cal/cm3)1/2, and the nanodiamond particles are dispersed with a particle diameter (D50) from 2 to 100 nm. The organic solvent is preferably at least one type of organic solvent selected from ketones, ethers, alcohols, and carbonates.

公开(公告)号：US11372138B2

公开(公告)日：2022-06-28

申请号：US16645252

申请日：2018-08-06

Applicant: DAICEL CORPORATION

Inventor： Takahiro Sakakibara ,  Kouichi Umemoto ,  Ryouta Kojima ,  Hiroki Kageyama

IPC: G02B1/111 ,  G02B1/14 ,  C08K7/26 ,  C08K9/06 ,  B32B27/20 ,  B32B27/18 ,  B32B27/30 ,  B82Y30/00

Abstract: An anti-reflection film (X) of the present invention includes a laminated structure including a substrate (11), a hard coat layer (12), and an anti-reflection layer (13), and a luminous reflectance of the anti-reflection layer (13) side is 2% or less. The anti-reflection layer (13) includes a surface (13a) having a coefficient of kinetic friction of 0.3 or less and a coefficient of static friction of 0.3 or less. In addition, in the anti-reflection film (X), after a rubbing test performed on the surface (13a) using steel wool #0000 as a rubbing material under conditions of a load of 200 g/cm2, a rubbing stroke length of 10 cm, and reciprocations of 1000 times, a difference of the haze value (%) after the rubbing test from the haze value (%) before the rubbing test is 0.1 or less. Such an anti-reflection film is suitable for achieving high scratch resistance together with high anti-reflective properties.

公开(公告)号：US11167993B2

公开(公告)日：2021-11-09

申请号：US16607048

申请日：2018-06-06

Applicant: DAICEL CORPORATION

Inventor： Kouichi Umemoto

IPC: C08K3/04 ,  C08K9/06 ,  C09C3/12 ,  C01B32/28

Abstract: The present invention is to provide a surface-modified nanodiamond having excellent affinity for an organic solvent and a resin and having high dispersibility in an organic solvent and in a resin. The surface-modified nanodiamond according to an embodiment of the present invention has a structure in which a surface of a nanodiamond particle is modified by a group represented by Formula (1) below. In Formula (1), R1 represents an aliphatic hydrocarbon group having 6 or more carbons. R2 and R3 may be the same or different and are each a hydrogen atom, an aliphatic hydrocarbon group having from 1 to 3 carbons, or a group represented by Formula (2) below.

公开(公告)号：US11046834B2

公开(公告)日：2021-06-29

申请号：US16494624

申请日：2018-04-03

Applicant: DAICEL CORPORATION

Inventor： Kouichi Umemoto

IPC: C08K9/06 ,  C01B32/28 ,  B82Y30/00 ,  B82Y40/00 ,  C08K3/04

Abstract: To provide a surface-modified nanodiamond including an N-substituted or unsubstituted amino group having excellent reactivity with other compounds; and having excellent dispersibility in dispersion media and resins. The surface-modified nanodiamond according to the present invention is a surface-modified nanodiamond including a surface-modifying group on a surface of a nanodiamond particle, wherein the surface-modifying group includes a group represented by Formula (1) below, wherein reference signs in Formula (1) below are as described in the present specification.