公开(公告)号：US20180081082A1

公开(公告)日：2018-03-22

申请号：US15566960

申请日：2016-04-15

Applicant: KANEKA CORPORATION

Inventor： Hiroto KOMA ,  Ryutaro MUKAI ,  Tomohiro ABO

IPC: G02B1/08 ,  G02B5/30 ,  C08K3/36 ,  C08L1/30 ,  C08J5/18 ,  C08K7/18

CPC classification number: G02B1/08 ,  C08J5/18 ,  C08J2301/28 ,  C08K3/36 ,  C08K7/18 ,  C08K9/06 ,  C08K2201/003 ,  C08K2201/011 ,  C08L1/30 ,  C08L2205/025 ,  G02B5/3083 ,  G02F1/13363 ,  C08L1/32

Abstract: The retardation film according to the present invention is characterized by: including a polymer material that includes at least one cellulose derivative which includes specific monomer units; having an in-plane retardation Re(550) of 105-160 nm, reverse wavelength dispersion property, Re(450)/Re(550), of 0.80-0.89, and a thickness of 20-50 μm; and containing inorganic particles. In particular, the present invention exhibits the effect of reducing the photoelastic coefficient.

公开(公告)号：US20160274286A1

公开(公告)日：2016-09-22

申请号：US15030683

申请日：2014-10-20

Applicant: KANEKA CORPORATION

Inventor： Ryutaro MUKAI ,  Tomohiro ABO

IPC: G02B5/30 ,  G02F1/1335 ,  G02B1/111 ,  G02F1/13363 ,  B29C55/04 ,  B29D11/00

CPC classification number: G02B5/3083 ,  B29C55/04 ,  B29C55/06 ,  B29D11/00788 ,  B29K2001/08 ,  B29L2011/00 ,  C08J5/18 ,  C08J2301/00 ,  G02B1/111 ,  G02B5/305 ,  G02F1/133528 ,  G02F1/13363 ,  G02F2001/133541 ,  G02F2001/133635 ,  G02F2202/40 ,  G02F2413/13 ,  Y10T428/105

Abstract: The present invention achieves a phase difference film that is excellent in wavelength dispersion property, in-plane retardation, and film thickness, by using a polymeric material (i) which is composed of at least one type of cellulose derivative having a specific alkoxyl group substitution degree D1 and a specific 2-naphthoyl group substitution degree D2 and (ii) which has a specific total 2-naphthoyl group substitution degree D3.

Abstract translation: 本发明通过使用由至少一种具有特定烷氧基取代的纤维素衍生物构成的聚合物（i），实现了波长分散性，面内相位差，膜厚优异的相位差膜 度D1和特定的2-萘甲酰基取代度D2和（ii）具有特定的总2-萘甲酰取代度D3。

公开(公告)号：US20240026205A1

公开(公告)日：2024-01-25

申请号：US18255424

申请日：2021-12-03

Applicant: AKITA UNIVERSITY ,  KANEKA CORPORATION

Inventor： Shigemi NAGANAWA ,  Ryutaro MUKAI

IPC: C09K8/20 ,  C09K8/035 ,  C09K8/03 ,  E21B21/00

CPC classification number: C09K8/206 ,  C09K8/035 ,  C09K8/032 ,  E21B21/003 ,  C09K2208/08

Abstract: The present invention is directed to a drilling fluid containing water, biodegradable fibers, and a thickener. The thickener contains a water-absorbing silicate, and the biodegradable fibers have a fiber length of 5.0 to 50 mm.

公开(公告)号：US20180282438A1

公开(公告)日：2018-10-04

申请号：US15766265

申请日：2016-10-06

Applicant: KANEKA CORPORATION

Inventor： Ryutaro MUKAI ,  Hiroto KOMA ,  Takahiro YASUMOTO ,  Katsuya FUJISAWA ,  Tomohiro ABO

IPC: C08B15/05 ,  C08B3/08 ,  C08J5/18 ,  G02B5/30

Abstract: Provided is a polymer material containing at least one kind of a cellulose derivative having (a) an organosilyl group (the organosilyl group having a first aliphatic group, an unsaturated aliphatic group, or an aromatic group), and (b) an acyl group or a second aliphatic group.

公开(公告)号：US20220228048A1

公开(公告)日：2022-07-21

申请号：US17614807

申请日：2020-06-04

Applicant: AKITA UNIVERSITY ,  KANEKA CORPORATION

Inventor： Shigemi NAGANAWA ,  Ryutaro MUKAI

IPC: C09K8/035 ,  C09K8/12 ,  C09K8/52

Abstract: An object of the present invention is to provide an environmentally friendly drilling fluid that has excellent cuttings transport capability and excellent hole cleaning capability. A drilling fluid according to the present disclosure is a drilling fluid containing water, biodegradable fibers, and a thickener. The thickener contains a biodegradable polysaccharide. The content of the biodegradable polysaccharide in the drilling fluid is greater than or equal to 0.01 g/L and less than or equal to 5 g/L.

公开(公告)号：US20200025989A1

公开(公告)日：2020-01-23

申请号：US16583814

申请日：2019-09-26

Applicant: KANEKA CORPORATION

Inventor： Ryutaro MUKAI ,  Hiroto Koma ,  Shinsuke Akao ,  Takahiro Yasumoto ,  Tomohiro Abo

IPC: G02B5/30 ,  C08J5/18

Abstract: Provided are: a novel retardation film which has low photoelastic coefficient, while having good linear thermal expansion coefficient and water absorption; and the novel retardation film which additionally has high heat resistance. The above-described problem is solved by a retardation film which has an absolute value of the linear thermal expansion coefficient of 100 ppm/° C. or less, a glass transition temperature of 180° C. or more, a photoelastic coefficient of from 5×10−12 m2/N to 30×10−12 m2/N and a water absorption of 2.0 wt % or less, or a retardation film which has an absolute value of the linear thermal expansion coefficient of 100 ppm/° C. or less, a photoelastic coefficient of from 5×10−12 m2/N to 30×10−12 m2/N and a water absorption of 2.0 wt % or less.