公开(公告)号：US11053386B2

公开(公告)日：2021-07-06

申请号：US16740572

申请日：2020-01-13

Applicant: KANEKA CORPORATION

Inventor： Ryohei Koyama ,  Tetsuo Okura

IPC: C08L67/04 ,  B29C49/00 ,  C08K5/11 ,  C08K5/14 ,  C08K5/1535 ,  C08J3/24 ,  C08K5/10 ,  B29K67/00 ,  C08L101/16

Abstract: Provided are a resin composition containing poly(3-hydroxyalkanoate), the resin composition enabling a film or a sheet to be stably produced under practical processing conditions by inflation molding; and a method for producing the resin composition. The resin composition includes 100 parts by weight of poly(3-hydroxyalkanoate) and 5 to 15 parts by weight of an ester compound, and having a ratio of 3.5×10−2 to 4.8×10−2 (sec/[Pa·s]) between a melt viscosity (Pa·s) and a drawdown time (sec).

公开(公告)号：US09850376B2

公开(公告)日：2017-12-26

申请号：US14433504

申请日：2013-10-01

Applicant: KANEKA CORPORATION

Inventor： Tetsuo Okura ,  Ryohei Koyama

IPC: C08G18/42 ,  C08L67/04 ,  C08L67/02 ,  C08K3/36 ,  C08K13/02 ,  C08K5/00 ,  C08K5/10

CPC classification number: C08L67/04 ,  C08K3/36 ,  C08K5/0016 ,  C08K5/10 ,  C08K13/02 ,  C08L67/02 ,  C08L101/16 ,  C08L2205/02

Abstract: A resin composition for producing a film or sheet having high tear strength that is excellent in processability, mechanical properties, and biodegradability. The resin composition is a biodegradable polyester resin composition containing: (i) an aliphatic polyester (P3HA) having a repeating unit of formula (1): [—CHR—CH2—CO—O—] (1), wherein R is an alkyl group represented by CnH2n+1, where n is an integer of 1 or more and 15 or less; (ii) polybutylene adipate terephthalate (PBAT); and hydrophilic silica (A), wherein a weight ratio of the aliphatic polyester (P3HA) to the polybutylene adipate terephthalate (PBAT) is 90/10 to 10/90, and an amount of the hydrophilic silica (A) is 2 to 30 parts by weight with respect to 100 parts by weight of a total amount of the aliphatic polyester (P3HA) and the polybutylene adipate terephthalate (PBAT) combined.

公开(公告)号：US11542373B2

公开(公告)日：2023-01-03

申请号：US16497614

申请日：2018-03-28

Applicant: KANEKA CORPORATION

Inventor： Ryohei Koyama

IPC: C08J3/22 ,  B29C48/00 ,  C08J5/18 ,  B29K67/00 ,  B29L23/00

Abstract: Provided is a method with which a biodegradable polyester film containing polyhydroxyalkanoate can be stably produced by film blowing under practical processing conditions. A method for producing a biodegradable polyester film containing a biodegradable aliphatic polyester (A) and a fatty acid amide (B) by film blowing, the biodegradable aliphatic polyester (A) containing polyhydroxyalkanoate, the method including: a step (I) of dry-blending the biodegradable aliphatic polyester (A) with a masterbatch containing the fatty acid amide (B) and a base material resin; and a step (II) of subjecting the mixture obtained in the step (I) to film blowing.

公开(公告)号：US10030117B2

公开(公告)日：2018-07-24

申请号：US15028627

申请日：2014-09-12

Applicant: KANEKA CORPORATION

Inventor： Ryohei Koyama ,  Tetsuya Minami ,  Noriyuki Suzuki

IPC: C08K5/053 ,  C08K7/02 ,  C08J5/00 ,  C08K3/26 ,  C08K3/34 ,  C08K5/11 ,  C08K11/00 ,  C08K3/013

Abstract: An object of the present invention is to: improve slowness of crystallization that is a drawback of polyhydroxyalkanoate; suppress bloom of a nucleating agent or the like; and improve surface smoothness and mold transferability of an obtained molded body.The present invention provides an aliphatic polyester resin composition including polyhydroxyalkanoate (A), pentaerythritol (B), and a filler (C).

公开(公告)号：US09765198B2

公开(公告)日：2017-09-19

申请号：US14892149

申请日：2014-03-26

Applicant: KANEKA CORPORATION

Inventor： Ryohei Koyama ,  Tetsuya Minami ,  Noriyuki Suzuki

IPC: C08K5/053 ,  C08K5/103 ,  C08L101/16

CPC classification number: C08K5/053 ,  C08K5/103 ,  C08L101/16 ,  C08L67/02

Abstract: Provided is a resin composition excellent in processability and productivity, which improves low crystallization rate and improves processability in forming such as injection molding or sheet forming. Provided is a polyester resin composition including a polyester resin (A), a crystallization promoter (B), and pentaerythritol (C).

公开(公告)号：US20150232660A1

公开(公告)日：2015-08-20

申请号：US14433504

申请日：2013-10-01

Applicant: KANEKA CORPORATION

Inventor： Tetsuo Okura ,  Ryohei Koyama

IPC: C08L67/04 ,  C08L67/02

CPC classification number: C08L67/04 ,  C08K3/36 ,  C08K5/0016 ,  C08K5/10 ,  C08K13/02 ,  C08L67/02 ,  C08L101/16 ,  C08L2205/02

Abstract: Provided is a resin composition that is suitable for use in producing a film or sheet having high tear strength and is excellent in processability, mechanical properties, and biodegradability. The resin composition is a biodegradable polyester resin composition containing an aliphatic polyester (P3HA) having a repeating unit represented by the following general formula (1) [—CHR—CH2—CO—O—]  (1) (wherein R is an alkyl group represented by CnH2n+1 and n is an integer of 1 or more and 15 or less), polybutylene adipate terephthalate (PBAT), and hydrophilic silica (A), wherein a weight ratio of the aliphatic polyester (P3HA) to the polybutylene adipate terephthalate (PBAT) is 90/10 to 10/90, and an amount of the hydrophilic silica (A) contained is 2 to 30 parts by weight with respect to 100 parts by weight of a total amount of the aliphatic polyester (P3HA) and the polybutylene adipate terephthalate (PBAT) contained.

Abstract translation: 本发明提供一种适用于制造撕裂强度高，加工性，机械特性，生物降解性优异的膜或片的树脂组合物。 树脂组合物是含有具有下述通式（1）表示的重复单元的脂肪族聚酯（P3HA）[-CHR-CH2-CO-O-]（1）（式中，R为烷基）的生物降解性聚酯树脂组合物 由CnH2n + 1表示，n为1以上且15以下的整数），聚对苯二甲酸丁二醇酯（PBAT）和亲水性二氧化硅（A），其中脂肪族聚酯（P3HA）与聚己二酸丁二醇酯 （PBAT）为90/10〜10/90，亲水性二氧化硅（A）的含量相对于脂肪族聚酯（P3HA）的总量100重量份为2〜30重量份， 聚对苯二甲酸丁二醇酯（PBAT）。