公开(公告)号：US11920261B2

公开(公告)日：2024-03-05

申请号：US17259354

申请日：2018-08-14

Applicant: DAICEL CORPORATION

Inventor： Kyokutou Ga ,  Hiroki Taniguchi

IPC: D01F2/30 ,  D01F1/02

CPC classification number: D01F2/30 ,  D01F1/02

Abstract: An object is to mitigate plugging of spinneret hole, the plugging occurring with the passage of spinning time, even though cellulose acetate has a small titanium dioxide content or contains no titanium dioxide, and to prevent a reduction in pressure drop of the resulting cellulose acetate band. A cellulose acetate fiber having a titanium dioxide content of not greater than 0.05 wt. %; and a content of at least one type of metal oxide selected from the group consisting of Fe3O4, Fe2O3, MnO2, Cr2O3, Cr2CuO4, NiO, Sb2O3, and CoAl2O4 of not smaller than 0.05 wt. % and not greater than 1 wt. %.

公开(公告)号：US11572457B2

公开(公告)日：2023-02-07

申请号：US17715989

申请日：2022-04-08

Applicant: Daicel Corporation

Inventor： Hiroyuki Matsumura ,  Hiroki Taniguchi ,  Akihiro Higuchi ,  Tomohiro Hashizume ,  Masaaki Kusumoto

IPC: C08L1/12 ,  C08K3/22 ,  C08K5/10

Abstract: This cellulose acetate has a total degree of acetyl substitution of 1.75 or more and 2.55 or less, and a degree of acetyl substitution at 2-position or a degree of acetyl substitution at 3-position is 0.7 or less. This cellulose acetate composition includes the cellulose acetate and an additive. The additive is one or more selected from the group consisting of (a) substances of which a pH of a 1 wt. % aqueous solution at 20° C. is 8 or more, (b) substances that dissolve in water at 20° C. in an amount of 2 wt. % or more, and (c) substances that exhibit biodegradability in seawater.

公开(公告)号：US10889916B2

公开(公告)日：2021-01-12

申请号：US15111688

申请日：2014-01-15

Applicant: DAICEL CORPORATION

Inventor： Shu Shimamoto ,  Shizuka Okada ,  Hiroki Taniguchi ,  Toshikazu Nakamura

IPC: C08B3/06 ,  D01F2/28 ,  D04H1/728 ,  D01D5/00 ,  D04H1/425

Abstract: Provided are a cellulose acetate fiber and a cellulose acetate fiber molded article which are excellent in water solubility and biodegradability and are small in load onto the natural environment even when allowed to stand still in the environment. The invention provides a cellulose acetate fiber containing cellulose acetate having a total degree of acetyl substitution of 0.4 to 1.3 and a compositional distribution index (CDI) of 2.0 or less as well as a cellulose acetate fiber molded article.

公开(公告)号：US09543057B2

公开(公告)日：2017-01-10

申请号：US14419946

申请日：2013-08-08

Applicant: DAICEL CORPORATION

Inventor： Toshikazu Nakamura ,  Shu Shimamoto ,  Shizuka Okada ,  Hiroki Taniguchi

IPC: H01B1/04 ,  H01B1/24 ,  H01M4/583 ,  B82Y30/00 ,  C08L1/10 ,  C08K3/04 ,  C08K7/24 ,  C08J5/18

CPC classification number: H01B1/24 ,  C08J5/18 ,  C08J2301/12 ,  C08K3/04 ,  C08K3/041 ,  C08K3/042 ,  C08K3/045 ,  C08K7/24 ,  C08K2201/001 ,  C08K2201/011 ,  C08L1/10

Abstract: The conductive cellulose-based resin composition of the present invention comprises (A) a cellulose acetate ester having a total degree of acetyl substitution of 0.5 to 1.1 and (B) at least one carbon material selected from the group consisting of single-walled carbon nanotube, multi-walled carbon nanotube, single-layer graphene, multi-layer graphene, fullerene, and carbon black. This conductive cellulose resin composition exhibits high conductivity even without being supplemented with a special resin or a third component. Also, the conductive cellulose-based resin composition can be easily molded in an aqueous system.

Abstract translation: 本发明的导电性纤维素类树脂组合物包含（A）总乙酰基取代度为0.5〜1.1的乙酸纤维素酯和（B）至少一种选自单壁碳纳米管 ，多壁碳纳米管，单层石墨烯，多层石墨烯，富勒烯和炭黑。 该导电性纤维素树脂组合物即使不添加特殊的树脂或第三成分，也显示出高的导电性。 此外，导电性纤维素类树脂组合物也可以容易地在水性体系中成型。

公开(公告)号：US20150221410A1

公开(公告)日：2015-08-06

申请号：US14419946

申请日：2013-08-08

Applicant: DAICEL CORPORATION

Inventor： Toshikazu Nakamura ,  Shu Shimamoto ,  Shizuka Okada ,  Hiroki Taniguchi

IPC: H01B1/24

CPC classification number: H01B1/24 ,  C08J5/18 ,  C08J2301/12 ,  C08K3/04 ,  C08K3/041 ,  C08K3/042 ,  C08K3/045 ,  C08K7/24 ,  C08K2201/001 ,  C08K2201/011 ,  C08L1/10

Abstract: The conductive cellulose-based resin composition of the present invention comprises (A) a cellulose acetate ester having a total degree of acetyl substitution of 0.5 to 1.1 and (B) at least one carbon material selected from the group consisting of single-walled carbon nanotube, multi-walled carbon nanotube, single-layer graphene, multi-layer graphene, fullerene, and carbon black. This conductive cellulose resin composition exhibits high conductivity even without being supplemented with a special resin or a third component. Also, the conductive cellulose-based resin composition can be easily molded in an aqueous system.

Abstract translation: 本发明的导电性纤维素类树脂组合物包含（A）总乙酰基取代度为0.5〜1.1的乙酸纤维素酯和（B）至少一种选自单壁碳纳米管 ，多壁碳纳米管，单层石墨烯，多层石墨烯，富勒烯和炭黑。 该导电性纤维素树脂组合物即使不添加特殊的树脂或第三成分，也显示出高的导电性。 此外，导电性纤维素类树脂组合物也可以容易地在水性体系中成型。

公开(公告)号：US10703825B2

公开(公告)日：2020-07-07

申请号：US14775369

申请日：2014-03-12

Applicant: DAICEL CORPORATION

Inventor： Shizuka Ukita ,  Hiroki Taniguchi ,  Shu Shimamoto ,  Toshikazu Nakamura

IPC: C08B3/06 ,  C08B3/24 ,  D01F2/28 ,  C08L1/12 ,  C08L1/14 ,  C08J5/18 ,  C08B3/28

Abstract: A cellulose acetate according to the present invention has a total degree of acetyl substitution of 0.4 to 1.1 and has a compositional distribution index (CDI) of 3.0 or less, where the CDI is specified by the formula: CDI=(Measured value of half height width of chemical composition)/(Theoretical value of half height width of chemical composition) where the measured value of half height width of chemical composition is a half height width of chemical composition determined by analyzing a cellulose acetate propionate by HPLC, where the cellulose acetate propionate is prepared by propionylating all residual hydroxy groups of the cellulose acetate (sample); and Theoretical value of half height width of chemical composition=2·35482√{square root over (3*DPw*(DS/3)*(1−DS/3))}/DPw  [Math. 1] where DS is the total degree of acetyl substitution; and DPw is a weight-average degree of polymerization determined by a GPC-light scattering method using a cellulose acetate propionate prepared by propionylating all residual hydroxy groups of the cellulose acetate (sample).

公开(公告)号：US12157808B2

公开(公告)日：2024-12-03

申请号：US18086673

申请日：2022-12-22

Applicant: Daicel Corporation

Inventor： Hiroyuki Matsumura ,  Hiroki Taniguchi ,  Akihiro Higuchi ,  Tomohiro Hashizume ,  Masaaki Kusumoto

IPC: C08L1/12 ,  C08K3/22 ,  C08K5/10

Abstract: This cellulose acetate has a total degree of acetyl substitution of 1.75 or more and 2.55 or less, and a degree of acetyl substitution at 2-position or a degree of acetyl substitution at 3-position is 0.7 or less. This cellulose acetate composition includes the cellulose acetate and an additive. The additive is one or more selected from the group consisting of (a) substances of which a pH of a 1 wt. % aqueous solution at 20° C. is 8 or more, (b) substances that dissolve in water at 20° C. in an amount of 2 wt. % or more, and (c) substances that exhibit biodegradability in seawater.

公开(公告)号：US11512183B2

公开(公告)日：2022-11-29

申请号：US17053439

申请日：2019-02-15

Applicant: DAICEL CORPORATION

Inventor： Kyokutou Ga ,  Hiroki Taniguchi

IPC: C08L1/12 ,  B29C51/00 ,  C08K5/11 ,  B29K1/00

Abstract: An object of the present invention is to provide a cellulose acetate composition for thermoforming with excellent biodegradability and excellent thermoformability. A cellulose acetate composition for thermoforming containing a cellulose acetate and a glycerin ester-based plasticizer, wherein the cellulose acetate has a degree of acetyl substitution of 1.4 or greater and 2.0 or less, a compositional distribution index (CDI) of 4.0 or less, and a total sulfur content of 15 mg/kg or greater and less than 150 mg/kg.