公开(公告)号：US20210180215A1

公开(公告)日：2021-06-17

申请号：US17259354

申请日：2018-08-14

Applicant: DAICEL CORPORATION

Inventor： Kyokutou GA ,  Hiroki TANIGUCHI

IPC: 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：US20220227973A1

公开(公告)日：2022-07-21

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：US20210317288A1

公开(公告)日：2021-10-14

申请号：US17267538

申请日：2019-08-05

Applicant: DAICEL CORPORATION

Inventor： Kyokutou GA ,  Hiroki TANIGUCHI

IPC: C08L1/12 ,  A24D3/10 ,  C08K5/11 ,  B29C51/00 ,  C08K5/103

Abstract: An object of the present invention is to provide a cellulose acetate composition with excellent biodegradability and water solubility, and excellent thermoformability. A cellulose acetate composition containing: a cellulose acetate having a degree of acetyl substitution of 0.4 or greater and less than 1.4; and at least one type of glycerin ester-based plasticizer selected from the group consisting of monoacetin and diacetin, wherein a content of the glycerin ester-based plasticizer is 3 parts by weight or greater per 100 parts by weight of the total amount of the cellulose acetate and the glycerin ester-based plasticizer.

公开(公告)号：US20230130981A1

公开(公告)日：2023-04-27

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：US20210380782A1

公开(公告)日：2021-12-09

申请号：US17053439

申请日：2019-02-15

Applicant: DAICEL CORPORATION

Inventor： Kyokutou GA ,  Hiroki TANIGUCHI

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

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:

公开(公告)号：US20160333500A1

公开(公告)日：2016-11-17

申请号：US15111688

申请日：2014-01-15

Applicant: DAICEL CORPORATION

Inventor： Shu SHIMAMOTO ,  Shizuka OKADA ,  Hiroki TANIGUCHI ,  Toshikazu NAKAMURA

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

CPC classification number: D01F2/28 ,  D01D5/003 ,  D04H1/425 ,  D04H1/728 ,  D10B2201/28 ,  D10B2401/024 ,  D10B2401/12

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.

Abstract translation: 本发明提供水溶性和生物降解性优异的乙酸纤维素纤维素和醋酸纤维素纤维成型体，即使在环境中静止的情况下也能够在自然环境中负载小。 本发明提供一种醋酸纤维素，其醋酸纤维素的总乙酰基取代度为0.4〜1.3，组成分布指数（CDI）为2.0以下，以及醋酸纤维素纤维成型体。

公开(公告)号：US20240228753A1

公开(公告)日：2024-07-11

申请号：US18281590

申请日：2021-03-12

Applicant: Daicel Corporation

Inventor： Masaaki KUSUMOTO ,  Hiroki TANIGUCHI ,  Takafumi KAWASAKI ,  Akihiro HIGUCHI

IPC: C08L1/12 ,  C08K5/11 ,  C08L67/02

CPC classification number: C08L1/12 ,  C08K5/11 ,  C08L67/02

Abstract: A thermoplastic resin composition may include a cellulose ester, a polyester, and a plasticizer. The plasticizer may have a number average molecular weight of 1000 or less. An amount of the polyester may be 120 parts by weight or less per 100 parts by weight of the cellulose ester. An amount of the plasticizer may be less than 100 parts by weight per 100 parts by weight of the cellulose ester.

公开(公告)号：US20160032020A1

公开(公告)日：2016-02-04

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

CPC classification number: C08B3/06 ,  C08B3/24 ,  C08B3/28 ,  C08J5/18 ,  C08J2301/12 ,  C08L1/12 ,  C08L1/14 ,  D01F2/28

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))}{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).

Abstract translation: 本发明的乙酸纤维素的总乙酰基取代度为0.4〜1.1，组成分布指数（CDI）为3.0以下，其中CDI由下式确定：CDI =（半高度的测定值 化学成分的宽度）/化学成分的半高宽度的测定值为通过HPLC分析醋酸丙酸纤维素而测定的化学成分的半高宽度的化学成分的半高宽度的理论值，其中乙酸纤维素 通过丙酰化乙酸纤维素（样品）的所有残留羟基来制备丙酸酯; （3 * DPw *（DS / 3）*（1-DS / 3））} {平方根超过（3 * DPw *（DS））的化学成分的半高宽度的理论值= 2·35482 / 3）*（1-DS / 3））} / DPw [ 1]其中DS是乙酰基取代的总量; DPw是通过使用通过丙酰化乙酸纤维素（样品）的所有残留羟基制备的丙酸纤维素的GPC-光散射法测定的重均聚合度。