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：US11905393B2

公开(公告)日：2024-02-20

申请号：US17256803

申请日：2019-07-18

Applicant: DAICEL CORPORATION

Inventor： Kyokutou Ga ,  Masahiko Suzuki

IPC: C08L1/12 ,  A24D3/17 ,  A24D1/20 ,  A24D3/02 ,  A24D3/06 ,  A24D3/10 ,  A24D3/14 ,  C08B3/06 ,  C08J5/18 ,  C08K5/11

CPC classification number: C08L1/12 ,  A24D1/20 ,  A24D3/02 ,  A24D3/068 ,  A24D3/10 ,  A24D3/14 ,  A24D3/17 ,  C08B3/06 ,  C08J5/18 ,  C08K5/11 ,  C08J2301/12 ,  C08L2203/16 ,  C08L2203/30 ,  C08L2205/06

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 comprising: a cellulose acetate having a degree of acetyl substitution of 0.4 or greater and less than 1.4; and a citrate ester-based plasticizer, wherein a content of the citrate 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 citrate ester-based plasticizer.

公开(公告)号：US11920021B2

公开(公告)日：2024-03-05

申请号：US17629856

申请日：2019-12-09

Applicant: DAICEL CORPORATION

Inventor： Hiroyuki Matsumura ,  Kyokutou Ga ,  Masaaki Kusumoto

IPC: C08L1/12 ,  C08J5/18 ,  C08K3/22

CPC classification number: C08L1/12 ,  C08J5/18 ,  C08K3/22 ,  C08K2003/222 ,  C08L2201/06

Abstract: An object of the present invention is to provide a cellulose acetate with excellent biodegradability in seawater.
A cellulose acetate having a total degree of acetyl substitution of not greater than 2.7, a ratio τ of a sum of a degree of acetyl substitution at the 2-position and a degree of acetyl substitution at the 3-position to a degree of acetyl substitution at the 6-position in the total degree of acetyl substitution of not less than 2.0, and a sulfate component amount of greater than 20 ppm and not greater than 400 ppm.

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.