公开(公告)号：US09671544B2

公开(公告)日：2017-06-06

申请号：US15030683

申请日：2014-10-20

Applicant: KANEKA CORPORATION

Inventor： Ryutaro Mukai ,  Tomohiro Abo

IPC: G02F1/13363 ,  G02B5/30 ,  B29C55/06 ,  C08J5/18 ,  B29C55/04 ,  B29D11/00 ,  G02B1/111 ,  G02F1/1335 ,  B29K1/00 ,  B29L11/00

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.

公开(公告)号：US11970654B2

公开(公告)日：2024-04-30

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

CPC classification number: C09K8/035 ,  C09K8/12 ,  C09K8/52 ,  C09K2208/08

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：US10851180B2

公开(公告)日：2020-12-01

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 ,  C08J5/18 ,  B29C55/06 ,  C08B13/00 ,  B29C55/00 ,  G02B5/30 ,  C08B3/08 ,  B29K1/00 ,  B29L31/34 ,  B29L11/00

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：US10663621B2

公开(公告)日：2020-05-26

申请号：US15566960

申请日：2016-04-15

Applicant: KANEKA CORPORATION

Inventor： Hiroto Koma ,  Ryutaro Mukai ,  Tomohiro Abo

IPC: G02B1/08 ,  C08K9/06 ,  C08J5/18 ,  C08K3/36 ,  C08K7/18 ,  C08L1/30 ,  G02B5/30 ,  G02F1/13363

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.