公开(公告)号：US20230287172A1

公开(公告)日：2023-09-14

申请号：US18006345

申请日：2021-07-20

Applicant: ENEOS Corporation

Inventor： Hiroshi MATSUURA ,  Masaki NOGUCHI ,  Yumiko NOBORI ,  Yoshihiro KUMAGAI

IPC: C08G63/60

CPC classification number: C08G63/605

Abstract: The invention provides a liquid crystal polyester resin which not only has a low-dielectric tangent, but also is excellent in balance between heat resistance and processing stability. The liquid crystal polyester resin comprises: a structural unit (I) derived from an aromatic hydroxycarboxylic acid; a structural unit (II) derived from an aromatic diol compound; and a structural unit (III) derived from an aromatic dicarboxylic acid, wherein the structural unit (I) is a structural unit (IA) derived from 6-hydroxy-2-naphthoic acid, the structural unit (III) contains a structural unit (IIIA) derived from terephthalic acid, a structural unit (IIIB) derived from isophthalic acid, and a structural unit (IIIC) derived from 2,6-naphthalenedicarboxylic acid, the dielectric tangent at a measurement frequency of 10 GHz is 1.50×10−3 or less, the melting point is 290° C. or more, and the difference in temperature between the melting point and the crystallization point is 30° C. or more.

公开(公告)号：US20230265238A1

公开(公告)日：2023-08-24

申请号：US18006360

申请日：2021-07-20

Applicant: ENEOS Corporation

Inventor： Hiroshi MATSUURA ,  Masaki NOGUCHI ,  Yumiko NOBORI ,  Yoshihiro KUMAGAI

IPC: C08G63/60

CPC classification number: C08G63/60

Abstract: The invention provides a liquid crystal polyester resin which not only has a low-dielectric tangent, but also is excellent in balance between heat resistance and processing stability. The liquid crystal polyester resin comprises: a structural unit (I) derived from an aromatic hydroxycarboxylic acid; a structural unit (II) derived from an aromatic diol compound; and a structural unit (III) derived from an aromatic dicarboxylic acid, wherein the structural unit (I) contains a structural unit (IA) derived from 6-hydroxy-2-naphthoic acid, the structural unit (III) contains a structural unit (IIIA) derived from terephthalic acid, and a structural unit (IIIB) derived from isophthalic acid, the dielectric tangent at a measurement frequency of 10 GHz is 1.50×10−3 or less, the melting point is 295° C. or more, and the difference between the melting point and the crystallization point is 35° C. or more.

公开(公告)号：US20230257519A1

公开(公告)日：2023-08-17

申请号：US18006355

申请日：2021-07-20

Applicant: ENEOS Corporation

Inventor： Hiroshi MATSUURA ,  Masaki NOGUCHI ,  Yumiko NOBORI ,  Yoshihiro KUMAGAI

IPC: C08G63/60

CPC classification number: C08G63/605 ,  C08G2250/00

Abstract: The invention provides a liquid crystal polyester resin which not only has a low-dielectric tangent, but also is excellent in balance between heat resistance and processing stability. The liquid crystal polyester resin comprises: a structural unit (I) derived from an aromatic hydroxycarboxylic acid; a structural unit (II) derived from an aromatic diol compound; and a structural unit (III) derived from an aromatic dicarboxylic acid, wherein the structural unit (I) contains a structural unit (IA) derived from 6-hydroxy-2-naphthoic acid, the structural unit (III) contains a structural unit (IIIA) derived from isophthalic acid and a structural unit (IIIB) derived from 2,6-naphthalenedicarboxylic acid, the dielectric tangent at a measurement frequency of 10 GHz is 1.50×10−3 or less, the melting point is 290° C. or more, and the difference in temperature between the melting point and the crystallization point is 30° C. or more.

公开(公告)号：US20210269730A1

公开(公告)日：2021-09-02

申请号：US17258304

申请日：2019-07-30

Applicant: ENEOS Corporation

Inventor： Yuji SHITARA ,  Yohei SHONO ,  Hidetoshi OGATA ,  Kazushi KODAMA ,  Hiroshi MATSUURA ,  Satoshi MASUYAMA

IPC: C10M105/06 ,  C10M101/02 ,  C08J7/06

Abstract: A lubrication method including lubricating a sliding member which contains at least one selected from the group consisting of a liquid crystal polymer and polyetheretherketone by using a lubricating oil composition which contains at least one selected from the group consisting of a mineral oil and alkyl benzene as a lubricating base oil.

公开(公告)号：US20210388156A1

公开(公告)日：2021-12-16

申请号：US17286343

申请日：2019-10-15

Applicant: ENEOS Corporation

Inventor： Hiroshi MATSUURA

IPC: C08G63/193 ,  C08K7/14 ,  C08K7/06 ,  C08K3/40 ,  C08K3/04 ,  C08L27/12 ,  C08L77/10 ,  C08G63/183 ,  C08G63/185

Abstract: The invention provides a crystalline wholly aromatic polyester that is capable of improving slidability and thermal stability at the time of molding, while having heat resistance. The crystalline wholly aromatic polyester is a polycondensate of an aromatic dicarboxylic acid and an aromatic diol, wherein a structural unit derived from the aromatic dicarboxylic acid comprises structural unit (I) of formula (1): structural unit (II) of formula (2): and structural unit (III) of formula (3): and a structural unit derived from the aromatic diol comprises structural unit (IV) of formula (4): wherein 30 mol %≤structural unit (I)≤40 mol %; 5 mol %≤structural unit (II)≤10 mol %; 5 mol %≤structural unit (III)≤10 mol %; and 45 mol %≤structural unit (I)+structural unit (II)+structural unit (III)≤50 mol %.

公开(公告)号：US20210269731A1

公开(公告)日：2021-09-02

申请号：US17258310

申请日：2019-07-30

Applicant: ENEOS Corporation

Inventor： Yuji SHITARA ,  Yohei SHONO ,  Hidetoshi OGATA ,  Kazushi KODAMA ,  Hiroshi MATSUURA ,  Satoshi MASUYAMA

IPC: C10M105/32 ,  C10M103/02 ,  C10M171/02 ,  C10M171/06

Abstract: A lubrication method including lubricating a sliding member which contains at least one selected from the group consisting of a liquid crystal polymer and polyetheretherketone by using a lubricating oil composition which contains an ester as a lubricating base oil.