公开(公告)号：US20230250228A1

公开(公告)日：2023-08-10

申请号：US17913045

申请日：2021-03-08

Applicant: TOYOBO CO., LTD.

Inventor： Satoru NAKAGAWA ,  Kosuke UOTANI ,  Shinya KANETAKA

IPC: C08G63/692 ,  C08G63/80

CPC classification number: C08G63/692 ,  C08G63/80

Abstract: A method for producing polyester resin containing an ethylene terephthalate structural unit of not less than 85 mol%, the method comprising: a melt-polymerization step of continuously performing melt-polymerization in two or more polymerization vessels by using an aluminium compound and a phosphorus compound as a polymerization catalyst; and a solid phase polymerization step of performing solid phase polymerization after the melt-polymerization step, wherein a polymerization in a final polymerization vessel of the melt-polymerization step satisfies a condition represented by the following formula: 410≤T*RT*(P/Al)≤580, wherein T represents a temperature (°C) in the final polymerization vessel, RT represents residence time (hour) in the final polymerization vessel, and P/Al represents a molar ratio of phosphorus element to aluminium element in the polyester resin.

公开(公告)号：US20230365747A1

公开(公告)日：2023-11-16

申请号：US18026192

申请日：2021-09-02

Applicant: TOYOBO CO., LTD.

Inventor： Satoru NAKAGAWA ,  Kosuke UOTANI ,  Shinya KANETAKA

IPC: C08G63/84 ,  C08G63/183 ,  C08G63/87 ,  C08G63/80

CPC classification number: C08G63/84 ,  C08G63/183 ,  C08G63/87 ,  C08G63/80

Abstract: The present invention provides a polyester resin and a hollow molded body containing reduced amounts of cyclic trimer and aluminum-based foreign matter, with maintained catalytic activity and a reduced catalyst cost. A polyester resin, comprising an aluminum compound and a phosphorus compound, and satisfying the following (1) to (3): (1) a content of aluminum element in the polyester resin is 9 to 19 ppm by mass, (2) a content of phosphorus element in the polyester resin is 22 to 40 ppm by mass. and (3) a mole ratio of phosphorus element to aluminum element in the polyester resin is 1.55 or more and 1.85 or less.

公开(公告)号：US20230151208A1

公开(公告)日：2023-05-18

申请号：US17917323

申请日：2021-04-09

Applicant: TOYOBO CO., LTD.

Inventor： Satoru NAKAGAWA ,  Kosuke UOTANI ,  Shinya KANETAKA

IPC: C08L67/02 ,  C08G63/183 ,  C08G63/78 ,  C08G63/84 ,  G09F3/04

CPC classification number: C08L67/025 ,  C08G63/183 ,  C08G63/785 ,  C08G63/84 ,  G09F3/04 ,  C08L2207/20 ,  C08L2203/16

Abstract: The present invention relates to a copolymerized polyester resin which can give film characteristics being suitable for a use as a heat-shrinkable label and which is excellent in the recycling property. According to the present invention, there is provided a copolymerized polyester resin which contains dicarboxylic acid and diol as constituting components, wherein the copolymerized polyester resin contains terephthalic acid as a main component of a dicarboxylic acid component, and contains ethylene glycol as a main component of a diol component, wherein a content of neopentyl glycol is from 18 to 32% by mole and a content of diethylene glycol is from 7 to 15% by mole when a total amount of the whole diol component is taken as 100% by mole, and wherein a molar proportion of each phosphorus compound contained in the copolymerized polyester resin and having a specific structure satisfies the specific inequality (1).

公开(公告)号：US20170029575A1

公开(公告)日：2017-02-02

申请号：US15303393

申请日：2015-04-08

Applicant: TOYOBO CO., LTD.

Inventor： Kunihiro MAEDA ,  Hideto OHASHI ,  Satoru NAKAGAWA

IPC: C08J3/22 ,  C08K3/08 ,  C08J5/18 ,  C08K5/521

CPC classification number: C08J3/22 ,  C08G63/16 ,  C08J5/18 ,  C08J2367/02 ,  C08K3/08 ,  C08K5/521 ,  C08K2003/0825 ,  C08L67/00

Abstract: The present invention is a polyester composition for a masterbatch, which comprises a polyester, a magnesium compound, an alkali metal compound and a phosphorus compound, wherein magnesium atoms, alkali metal atoms and phosphorus atoms are contained in amounts of 400 to 2700 ppm by mass, 40 to 270 ppm by mass and 200 to 1700 ppm by mass, respectively, in the polyester composition, the melt resistivity of the polyester composition is 0.005×108 to 0.05×108 Ω·cm, and few contaminant particles are observed in the polyester composition under specified conditions. The polyester composition for a masterbatch has a satisfactorily low melt resistivity, contains few contaminant particles, and has an excellent color hue and excellent thermal stability.

Abstract translation: 本发明是一种母料用聚酯组合物，其包含聚酯，镁化合物，碱金属化合物和磷化合物，其中镁原子，碱金属原子和磷原子的含量为400〜2700质量ppm 在聚酯组合物中分别为40〜270质量ppm，200〜1700质量ppm，聚酯组合物的熔融电阻率为0.005×10 8〜0.05×10 8Ω·cm，在聚酯中观察到少量污染物 组成在规定的条件下。 母料的聚酯组合物具有令人满意的低熔体电阻率，含有很少的污染物颗粒，并且具有优异的色调和优异的热稳定性。

公开(公告)号：US20230002551A1

公开(公告)日：2023-01-05

申请号：US17784762

申请日：2020-12-14

Applicant: TOYOBO CO., LTD.

Inventor： Satoru NAKAGAWA ,  Kosuke UOTANI ,  Shinya KANETAKA

IPC: C08G63/183

Abstract: The present invention is to provide a high-quality polyester resin that is produced by using a polymerization catalyst containing an aluminum compound and a phosphorus compound, that can reduce a catalyst cost, for which polymerization activity is high, and in which there is less foreign matter. The polyester resin contains an aluminum compound and a phosphorus compound used as a catalyst, and the amount of aluminum atom contained in the polyester resin is 9 to 20 ppm, the amount of phosphorus atom contained in the polyester resin is 13 to 31 ppm, a mole ratio of the phosphorus atom to the aluminum atom in the polyester resin is 1.32 to 1.80.