公开(公告)号：US20230144380A1

公开(公告)日：2023-05-11

申请号：US17915684

申请日：2021-03-29

Applicant: TEIJIN LIMITED

Inventor： Akihisa NOMURA ,  Junshi SOEDA ,  Masayuki CHOKAI ,  Katsuhiro YAMANAKA

IPC: C08G75/029 ,  C08G75/0213 ,  C08L77/06 ,  C08G75/0254 ,  C08L81/02

CPC classification number: C08G75/029 ,  C08G75/0213 ,  C08L77/06 ,  C08G75/0254 ,  C08L81/02 ,  C08L2205/03 ,  C08L2205/12

Abstract: A polymer (B) essentially contains units represented by the following formulas (1), (2) and (3), wherein the number of moles of unit (1) is 0 to 95, the number of moles of unit (2) is 0 to 50, and the number of moles of unit (3) is 2 to 80 when the total number of moles of units (1), (2) and (3) is 100:




In units (1) to (3), “X” is a recurring unit having a benzene ring, in unit (2), —CH3 is substituted on the benzene ring, “m” is an integer of 1-6, unit (3) is obtained by substituting a hydrogen of —CH3 in unit (2) by a substituent “Z” derived from a carboxylic acid or anhydride thereof, “n” is an integer of 1-6 indicative of the number of substitutions, l+n=m, and unit (3) is a unit in which “n” is an integer of 1-6 or a combination thereof.

公开(公告)号：US20230126671A1

公开(公告)日：2023-04-27

申请号：US17906583

申请日：2020-11-25

Applicant: Kureha Corporation

Inventor： Takeshi SATO ,  Yoshinori SUZUKI

IPC: C08G75/0213 ,  C08G75/0254 ,  C08G75/0281

Abstract: To provide a method for producing PAS by which PAS having a small particle size of 50 μm or greater and 550 μm or less as an average particle size can be produced.
In the method for producing PAS, including: (1) a preparation step of preparing a prepared mixture containing an organic polar solvent, a sulfur source, and a dihalo aromatic compound; (2) a pre-stage polymerization step of initiating a polymerization reaction by heating the prepared mixture to produce a prepolymer; (3) a phase separation step of adding water as a phase separation agent to a reaction mixture in a reaction system to form a phase separation state; and (4) a post-stage polymerization step of continuing the polymerization reaction after the phase separation step, in which an organic sulfonic acid metal salt having a specific solubility in water is contained in the prepared mixture or the reaction mixture.

公开(公告)号：US11414521B2

公开(公告)日：2022-08-16

申请号：US17047341

申请日：2019-07-03

Applicant: LG CHEM, LTD.

Inventor： Kwonsu Jung ,  Joong Jin Han ,  Eunju Park ,  Hyun Woog Ryu ,  Hansol Kim

IPC: C08G75/0259 ,  C08G75/0213 ,  C08G75/0254 ,  C08G75/0281

Abstract: The present disclosure relates to a preparation method of a polyarylene sulfide, and this method may produce a polyarylene sulfide having properties equal to or higher than those of the conventional method at a high yield by using a dihalogenated aromatic compound in a predetermined equivalent ratio with respect to a sulfur compound and performing both dehydration and polymerization under optimum conditions.

公开(公告)号：US20210115193A1

公开(公告)日：2021-04-22

申请号：US17047341

申请日：2019-07-03

Applicant: LG CHEM, LTD.

Inventor： Kwonsu JUNG ,  Joong Jin HAN ,  Eunju PARK ,  Hyun Woog RYU ,  Hansol KIM

IPC: C08G75/0259 ,  C08G75/0254 ,  C08G75/0281 ,  C08G75/0213

Abstract: The present disclosure relates to a preparation method of a polyarylene sulfide, and this method may produce a polyarylene sulfide having properties equal to or higher than those of the conventional method at a high yield by using a dihalogenated aromatic compound in a predetermined equivalent ratio with respect to a sulfur compound and performing both dehydration and polymerization under optimum conditions.

公开(公告)号：US10138577B2

公开(公告)日：2018-11-27

申请号：US15315042

申请日：2015-05-22

Applicant: Toray Industries, Inc.

Inventor： Hiroo Katsuta ,  Takaaki Mihara ,  Daisuke Yamamoto ,  Shunsuke Horiuchi ,  Yoshitsugu Funatsu

IPC: C08G75/00 ,  D01F6/76 ,  C08G75/0213 ,  C08G75/0254 ,  C08G75/0277 ,  D01D5/08 ,  D02J1/22 ,  D01D10/02 ,  D01F6/94

Abstract: A poly(phenylene sulfide) fiber contains 1-10% by weight of a poly(phenylene sulfide) oligomer having a weight-average molecular weight of 5,000 or less, has a difference between a cold crystallization heat quantity (ΔHc) and a crystal melting heat quantity (ΔHm) during temperature rising in DSC, ΔHm−ΔHc, of 25 J/g or larger, and has an elongation of less than 40% and a strength of 3.0 cN/dtex or higher. The poly(phenylene sulfide) fiber has high heat resistance and chemical resistance and high strength and, despite this, has excellent suitability for high-order processing, e.g., thermal shapability, because the amorphous parts thereof have high molecular movability.

公开(公告)号：US10081710B2

公开(公告)日：2018-09-25

申请号：US15787066

申请日：2017-10-18

Applicant: Kureha Corporation

Inventor： Akihiro Konno ,  Yasuhiro Suzuki

IPC: C08G75/00 ,  C08G75/0231 ,  C08G75/02 ,  C08G75/0213 ,  C08G75/0259

CPC classification number: C08G75/0231 ,  C08G75/02 ,  C08G75/0213 ,  C08G75/0259

Abstract: A branched polyarylene sulfide resin includes an —S— substituent group with a cleaved disulfide compound, which has a halogen content of 4,000 ppm or less, a melt viscosity as measured at a temperature of 330° C. and a shear rate of 2 sec−1 of 1.0×104 to 50.0×104 Pa·s, and a melt viscoelasticity tan δ as measured at a temperature of 310° C. and an angular velocity of 1 rad/sec of 0.1 to 0.6.

公开(公告)号：US20170362387A1

公开(公告)日：2017-12-21

申请号：US15540636

申请日：2015-12-18

Applicant: Kureha Corporation

Inventor： AKIHIRO KONNO ,  KEN-ICHI TAKAKI ,  HIROYUKI SATO

IPC: C08G75/0259 ,  C08G75/0281 ,  C08G75/0213

CPC classification number: C08G75/0259 ,  C08G75/02 ,  C08G75/0213 ,  C08G75/0281

Abstract: A method of producing polyarylene sulfide (PAS) by subjecting a sulfur source and a dihalo aromatic compound (DHA) to polymerization reaction in an organic amide solvent under alkaline conditions, the method suppressing side reactions or the like and yielding PAS having a high degree of polymerization at a high yield is provided; and PAS having a high degree of polymerization are provided.A method of producing PAS, including: a preparation step of preparing a preparation mixture containing an organic amide solvent, a sulfur source, an alkali metal hydroxide, water, and DHA, and having a pH of 12.5 or higher; a first-stage polymerization step of heating the preparation mixture to 170° C. or higher to initiate a polymerization reaction and continuing the polymerization reaction at 240 to 280° C., thereby forming a prepolymer having a DHA conversion rate of 50% or greater (at this time, a temperature increasing rate from 220° C. to 240° C. is lower than a temperature increasing rate for 240° C. or higher); and a second-stage polymerization step of adding, in the reaction system, an alkali metal hydroxide in an amount of 1 to 20 mol % per 1 mol of the sulfur source in the presence of a phase separation agent to continue the polymerization reaction at 245 to 290° C. PAS having a melt viscosity (310° C.; shear rate: 1216 sec-1) of 0.1 to 8000 Pa·s produced by the method.

公开(公告)号：US20170107329A1

公开(公告)日：2017-04-20

申请号：US15128736

申请日：2015-03-25

Applicant: Kureha Corporation

Inventor： Akihiro KONNO ,  Takuya OHZAWA ,  Hirohito KAWAMA

IPC: C08G75/0277 ,  C08G75/0281 ,  C08G75/0254 ,  C08G75/0213

CPC classification number: C08G75/0277 ,  C08G75/0213 ,  C08G75/0254 ,  C08G75/0259 ,  C08G75/0281

Abstract: A heat treated fine polyarylene sulfide powder. (i) The heat treated fine polyarylene sulfide powder is manufactured from separation liquid. (ii) The heat treated fine polyarylene sulfide powder is obtained by subjecting the separation liquid to solid-liquid separation to obtain a raw material fine powder polyarylene sulfide. Thereafter the raw material fine powder polyarylene sulfide is subjected to pre-heat treatment and heat treatment. (iii) The heat treated fine polyarylene sulfide powder has an average particle size of from 1 to 80 μm. (iv) The heat treated fine polyarylene sulfide powder has a melt viscosity of 1 Pa·s or greater. (v) A generated gas amount of the heat treated fine polyarylene sulfide is 10 ppm or less.

公开(公告)号：US11440996B2

公开(公告)日：2022-09-13

申请号：US16957934

申请日：2018-07-12

Applicant: ZHEJIANG NHU COMPANY LTD. ,  ZHEJIANG UNIVERSITY ,  ZHEJIANG NHU SPECIAL MATERIALS CO., LTD.

Inventor： Woyuan Li ,  Hong Yin ,  Zhirong Chen ,  Baishan Hu ,  Guiyang Zhou ,  Hangjun Deng ,  Ming Lian ,  Xiongwei Zhang ,  Qichuan Li ,  Jiang Zhao

IPC: C08G75/0254 ,  C08G75/0213 ,  C08G75/029

Abstract: A preparation method of a polyphenylene sulfide resin, and a polyphenylene sulfide resin prepared by the method using a sulfur-containing compound, an alkaline substance and p-dichlorobenzene as raw materials, a fatty acid as a polycondensation aid to carry out a polycondensation reaction. After purification treatment, a primary polyphenylene sulfide is obtained, which then reacts with a terminal-group adjusting agent at a high temperature to generate the polyphenylene sulfide resin resulting in high yield and low cost. The prepared polyphenylene sulfide resin has high reactivity, high melting crystallization temperature and excellent thermal stability. The resulting polyphenylene sulfide resin can be directly used for extrusion and injection molding.

公开(公告)号：US11370915B2

公开(公告)日：2022-06-28

申请号：US16661976

申请日：2019-10-23

Applicant: SK CHEMICALS CO., LTD.

Inventor： Se-Ho Lee ,  Sung-Gi Kim

IPC: C08L81/04 ,  C08G75/0263 ,  C08G75/0213 ,  C08G75/14 ,  C08G75/02 ,  C08L81/02 ,  C08G75/029 ,  C08K7/14 ,  C08L33/14 ,  C08L77/00

Abstract: The present invention relates to a polyarylene sulfide resin composition having good processability and showing excellent properties due to its more improved miscibility with other polymer materials or fillers, and a formed article. Such polyarylene sulfide resin composition includes a polyarylene sulfide including a disulfide repeating unit in the repeating units of the main chain; and at least one component selected from the group consisting of a thermoplastic resin, a thermoplastic elastomer, and a filler.