公开(公告)号：US20230193014A1

公开(公告)日：2023-06-22

申请号：US17630251

申请日：2020-05-19

Applicant: KURARAY CO., LTD.

Inventor： Yu Ito ,  Makoto Okamoto ,  Makoto Suzuki

IPC: C08L31/04 ,  B29C45/17 ,  C08K3/26

CPC classification number: C08L31/04 ,  B29C45/1753 ,  C08K3/26 ,  C08K2003/262

Abstract: A purging agent of the present invention contains a resin composition containing a hydrophilic resin (A), water (B), and a basic compound (C). The mass ratio (A)/(B) of the hydrophilic resin (A) to the water (B) is 66/34 to 90/10, and the content of the basic compound (C) is 0.25 to 7 parts by mass with respect to 100 parts by mass of the hydrophilic resin (A).

公开(公告)号：US11149143B2

公开(公告)日：2021-10-19

申请号：US16631202

申请日：2018-07-23

Applicant: KURARAY CO., LTD.

Inventor： Yu Ito ,  Makoto Suzuki ,  Makoto Okamoto

IPC: C08L51/06 ,  C08L51/00 ,  B32B1/02 ,  B32B27/08 ,  B32B27/30 ,  B32B27/32 ,  B32B27/20 ,  B60K15/03

Abstract: A resin composition (E) includes from 0.1 to 20 parts by mass of an ethylene-vinyl alcohol copolymer (B), from 0.1 to 20 parts by mass of an acid-modified polyolefin (C), and from 0.1 to 10 parts by mass of an acid-modified polyolefin (D) based on 100 parts by mass of a polyolefin (A), wherein the polyolefin (A) has an MFR (190° C., under a load of 2.16 kg) from 0.01 to 10 g/10 min, the acid-modified polyolefin (C) has an acid value from 0.1 to 9 mg KOH/g, the acid-modified polyolefin (D) has an acid value of more than 10 mg KOH/g and 120 mg KOH/g or less, and a ratio (D/A) of an MFR (190° C., under a load of 2.16 kg) of the acid-modified polyolefin (D) to the MFR (190° C., under a load of 2.16 kg) of the polyolefin (A) is 50 or more. The resin composition (E) of the present invention causes reduction in the amount of deteriorated materials adhering to a screw and/or a die even when long-term continuous melt molding is conducted. Use of the resin composition (E) also allows production of a molded article exhibiting excellent impact resistance and appearance. The production method of the present invention allows long-term stable production of the resin composition (E).

公开(公告)号：US09663592B2

公开(公告)日：2017-05-30

申请号：US14419338

申请日：2013-08-07

Applicant: KURARAY CO., LTD.

Inventor： Makoto Okamoto ,  Keisuke Morikawa

IPC: C08F16/06 ,  B32B7/12 ,  B32B27/08 ,  B32B27/30 ,  B32B27/32 ,  B32B27/36 ,  B32B1/02 ,  C08F22/10 ,  C08L29/06 ,  C08F216/06 ,  C08F8/12

CPC classification number: C08F16/06 ,  B32B1/02 ,  B32B7/12 ,  B32B27/08 ,  B32B27/306 ,  B32B27/32 ,  B32B27/36 ,  B32B2307/7242 ,  B32B2307/7244 ,  B32B2307/736 ,  B32B2439/00 ,  B32B2439/40 ,  B32B2439/70 ,  C08F8/12 ,  C08F22/10 ,  C08F216/06 ,  C08L29/06 ,  Y10T428/1352 ,  Y10T428/1397 ,  Y10T428/31515 ,  Y10T428/31913 ,  Y10T428/31938 ,  C08F210/02 ,  C08F216/08 ,  C08F216/16 ,  C08F218/08 ,  C08F216/1416

Abstract: Provided is a modified ethylene-vinyl alcohol copolymer, wherein the copolymer is represented by a following formula (I), contents (mol %) of a, b, and c based on the total monomer units satisfy following formulae (1) through (3), and a degree of saponification (DS) defined by a following formula (4) is not less than 90 mol %, 18≦a≦55  (1) 0.01≦c≦20  (2) [100−(a+c)]×0.9≦b≦[100−(a+c)]  (3) DS=[(Total Number of Moles of Hydrogen Atoms in X, Y, and Z)/(Total Number of Moles of X, Y, and Z)]×100  (4).

公开(公告)号：US10808110B2

公开(公告)日：2020-10-20

申请号：US16308925

申请日：2017-06-28

Applicant: KURARAY CO., LTD.

Inventor： Eriko Kometani ,  Makoto Okamoto ,  Mitsunori Asada ,  Yaqi Li

IPC: C08L23/08 ,  C08K5/20 ,  C08L29/04

Abstract: A resin composition superior in stability and external appearance characteristics during/following melt molding; and an extrusion-molded article, an injection-molded article and a blow-molded article that are formed from the resin composition are provided. The resin composition contains an ethylene-vinyl alcohol copolymer as a principle component, and has a heterogeneous nucleation index (f) of less than 0.6 as determined by formula (1) based on a differential scanning calorimetry (DSC) curve obtained by DSC in which the resin composition is cooled at a rate of 150° C./sec from a molten state at 210° C. In the formula (1), Qtotal represents an area of a total region surrounded by the DSC curve and a base line, and Qhetero represents an area of a heterogeneous region that is a part of the total region, falling within a range from the temperature lower than the melting point by 38° C. to a temperature lower than the melting point by 75° C. f=Qhetero/Qtotal  (1)

公开(公告)号：US20230311461A1

公开(公告)日：2023-10-05

申请号：US18118364

申请日：2023-03-07

Applicant: Kuraray Co., Ltd.

Inventor： Diana Maya ,  Edgard Chow ,  Makoto Okamoto

IPC: B32B27/08 ,  B32B27/32 ,  B32B27/30 ,  B32B27/34 ,  B32B7/02 ,  B65D65/40 ,  B65B25/00 ,  B65B55/02

CPC classification number: B32B27/08 ,  B32B27/32 ,  B32B27/306 ,  B32B27/34 ,  B32B27/302 ,  B32B7/02 ,  B65D65/40 ,  B65B25/001 ,  B65B55/02 ,  B32B2270/00 ,  B32B2307/7244 ,  B32B2307/7246 ,  B32B2307/704 ,  B32B2307/702 ,  B32B2274/00 ,  B32B2250/24 ,  B32B2307/7376 ,  B32B2307/412 ,  B32B2439/46 ,  B32B2439/70 ,  B32B2307/581

Abstract: The present disclosure provides a multilayer structure including a first polyolefin layer comprising a first polyolefin resin, a gas barrier layer comprising ethylene-vinyl alcohol copolymer, and a second polyolefin layer comprising a second polyolefin resin. The present disclosure further provides a package made of the multilayer structure and also methods of use thereof.

公开(公告)号：US11767386B2

公开(公告)日：2023-09-26

申请号：US16474822

申请日：2017-12-28

Applicant: KURARAY CO., LTD.

Inventor： Rina Hoshika ,  Makoto Okamoto ,  Makoto Suzuki

IPC: A61L2/04 ,  B32B27/08 ,  B32B27/30 ,  B65B55/02 ,  B65D65/40 ,  C08F216/38 ,  B32B27/32

CPC classification number: C08F216/38 ,  A61L2/04 ,  B32B27/08 ,  B32B27/306 ,  B32B27/32 ,  B65B55/02 ,  B65D65/40 ,  A61L2202/23 ,  B32B2250/03 ,  B32B2250/246 ,  B32B2250/40 ,  B32B2307/7244 ,  B32B2439/00 ,  C08F2800/10

Abstract: A hot-water sterilized package includes a container having a barrier layer filled with contents, wherein the barrier layer contains 96 mass % or more of a modified ethylene-vinyl alcohol copolymer based on the resin total, the modified ethylene-vinyl alcohol copolymer is represented by a following formula (I), contents (mol %) of a, b, and c based on the total monomer units satisfy following formulae (1) through (3), a degree of saponification (DS) defined by a following formula (4) is 90 mol % or more, and in measurement using a differential scanning calorimeter (DSC), crystalline melting enthalpy (ΔHA: J/g) during temperature rise in a hydrated state and crystalline melting enthalpy (ΔHB: J/g) during temperature rise after drying and melting followed by rapid cooling satisfy following formulae (5) and (6). A container constituting such a package has excellent in oxygen barrier properties even after hot-water sterilization, and thus degradation of content quality is inhibited for a long period.




18≤a≤55  (1)

0.01≤c≤20  (2)

[100−(a+c)]×0.9≤b≤[100−(a+c)]  (3)

DS=[(Total Number of Moles of Hydrogen Atoms in X,Y, and Z)/(Total Number of Moles of X,Y, and Z)]×100  (4)

ΔHA/ΔHB≥0.5  (5)

ΔHB≥70  (6).

公开(公告)号：US20230294378A1

公开(公告)日：2023-09-21

申请号：US18122980

申请日：2023-03-17

Applicant: KURARAY CO., LTD.

Inventor： Edgard Chow ,  Emilio Morales ,  Makoto Okamoto

IPC: B32B5/02 ,  B32B7/12 ,  B32B27/34 ,  B32B27/30 ,  B32B27/36 ,  B32B27/32 ,  B32B27/40 ,  B32B27/08 ,  B32B27/12

CPC classification number: B32B5/02 ,  B32B7/12 ,  B32B27/34 ,  B32B27/306 ,  B32B27/36 ,  B32B27/32 ,  B32B27/40 ,  B32B27/08 ,  B32B27/12 ,  B32B2307/714 ,  B32B2260/021 ,  B32B2260/046 ,  B32B2307/7244 ,  B32B2307/54 ,  B32B5/024 ,  B32B5/022 ,  B32B2262/0253 ,  B32B2262/0276 ,  B32B2262/0261 ,  B32B2262/0238 ,  B32B2262/065 ,  B32B2262/062

Abstract: A multilayer article including a chemical-resistant layer comprising a polyurea, where the chemical-resistant layer is not an adhesive layer between two layers, and a barrier layer comprising an ethylene-vinyl alcohol copolymer. The multilayer article has good flexibility and toughness, resistance to water and chemicals, and excellent barrier properties to organic solvents and gases.

公开(公告)号：US20210001608A1

公开(公告)日：2021-01-07

申请号：US16982521

申请日：2019-04-05

Applicant: Kuraray Co., Ltd.

Inventor： Satoshi Ishiuchi ,  Makoto Okamoto

IPC: B32B27/08 ,  B32B7/12 ,  B32B27/20 ,  B32B27/32 ,  B32B27/30 ,  B09B1/00 ,  E02D31/00

Abstract: There is provided a geomembrane consisting of a multilayer structure comprising a barrier layer (A), an adhesive layer (B) made of an acid-modified thermoplastic resin and a thermoplastic resin layer (C), wherein the thermoplastic resin layer (C) is laminated on at least one side of the barrier layer (A) via the adhesive layer (B), and the barrier layer (A) has an ethylene unit content of 18 mol % or more and 55 mol % or less and comprises a modified ethylene-vinyl alcohol copolymer comprising a modifying group having a primary hydroxyl group. The geomembrane exhibits excellent peer strength between the barrier layer and the adhesive layer, exhibits further improved peel strength after prolonged exposure to high temperature and high humidity conditions.

公开(公告)号：US10077358B2

公开(公告)日：2018-09-18

申请号：US15115482

申请日：2015-01-29

Applicant: KURARAY CO., LTD.

Inventor： Makoto Okamoto

IPC: C08J5/18 ,  C08L29/04 ,  C08L53/02

CPC classification number: C08L53/025 ,  B32B27/08 ,  B32B27/306 ,  B32B2307/558 ,  B32B2439/00 ,  C08J5/18 ,  C08K3/32 ,  C08K2003/324 ,  C08L29/04 ,  C08L53/02 ,  C08L2205/025

Abstract: A resin composition comprising a modified ethylene-vinyl alcohol copolymer (A) and an unmodified ethylene-vinyl alcohol copolymer (B), wherein the modified ethylene-vinyl alcohol copolymer (A) is represented by a following formula (I), contents (mol %) of a, b, and c based on the total monomer units satisfy following formulae (1) to (3), and a degree of saponification is not less than 80 mol %, thereby providing a resin composition that is excellent in a barrier property, impact resistance, and secondary processability and moreover excellent in productivity. 18≤a≤55  (1) 0.01≤c≤20  (2) [100−(a+c)]×0.9≤b≤[100−(a+c)]  (3).

公开(公告)号：US20230257491A1

公开(公告)日：2023-08-17

申请号：US18003775

申请日：2021-06-30

Applicant: KURARAY CO., LTD.

Inventor： Yasutaka Inubushi ,  Keishi Hachiya ,  Masaki Kato ,  Yoshikazu Yamasaki ,  Makoto Okamoto ,  Kazuyuki Somemiya ,  Takafumi Izawa

IPC: C08F16/06 ,  C07C69/15 ,  C08F18/08 ,  C08F8/12

CPC classification number: C08F16/06 ,  C07C69/15 ,  C08F18/08 ,  C08F8/12

Abstract: [Problem to be solved] To provide a traceable vinyl acetate, a polymer containing the vinyl acetate, and a vinyl alcohol polymer which is a saponified product of the polymer.
[Solution] Vinyl acetate having a ratio of carbon-14 to total carbon of 1.0×10−4 or more, a vinyl acetate polymer containing the vinyl acetate as a monomer unit and a vinyl alcohol polymer obtained by saponifying the vinyl acetate polymer.