公开(公告)号：US20210310186A1

公开(公告)日：2021-10-07

申请号：US17269593

申请日：2019-07-29

申请人： KURARAY CO., LTD.

发明人： Masashi MEGURO ,  Hitoshi NAKATSUKA

IPC分类号： D06N3/14 ,  D06N3/12

摘要： Disclosed is an artificial leather base material including: a non-woven fabric that is an entangle body of fibers (A) and fibers (B); and an elastic polymer applied inside the non-woven fabric, wherein the fibers (A) are crimped fibers that are formed from two types of resins with intrinsic viscosities different from each other, and that are filaments of 0.6 dtex or more, and the fibers (B) are ultrafine fibers of less than 0.6 dtex.

公开(公告)号：US20210309770A1

公开(公告)日：2021-10-07

申请号：US17267267

申请日：2019-09-03

申请人： KURARAY CO., LTD.

发明人： Yuji OKAMOTO ,  Yoshimi UMEMURA

IPC分类号： C08F16/06

摘要： Provided by the present invention is a production method of a polyvinyl alcohol resin in which a content of organic volatiles has been reduced while inhibiting fusing of the resin to itself. The production method includes a step of washing, with a washing liquid, a polyvinyl alcohol obtained by saponifying a polyvinyl ester, wherein the washing liquid contains 50 to 98 parts by mass of methyl acetate, 1 to 49 parts by mass of methanol, and 1 to 10 parts by mass of water with respect to 100 parts by mass being a total of methyl acetate, methanol, and water.

公开(公告)号：US11130319B2

公开(公告)日：2021-09-28

申请号：US16235753

申请日：2018-12-28

申请人： KURARAY CO., LTD.

发明人： Wataru Hirose ,  Edgard Chow

IPC分类号： B32B27/22 ,  C08F216/06 ,  B32B27/30 ,  B32B27/08 ,  B32B7/12 ,  B32B27/32 ,  B32B27/18 ,  C08J7/04 ,  C08J5/18

摘要： A multilayer article (such as a film) suitable for use as a fumigation barrier, the multilayer article comprising at least one an ethylene vinyl alcohol (EVOH) based barrier layer formed from a resin composition predominantly comprising an EVOH component of one or more specific types of ethylene-vinyl alcohol copolymers as described herein.

公开(公告)号：US20210292933A1

公开(公告)日：2021-09-23

申请号：US17285163

申请日：2019-10-25

申请人： KURARAY CO., LTD.

发明人： Yoshimi NONAKA ,  Yosuke WASHITAKE ,  Shinji SEKIYA ,  Ryokei ENDO

IPC分类号： D01F6/50 ,  D01F1/10

摘要： Polyvinyl alcohol-based fibers contain a polyvinyl alcohol-based polymer and an adsorbent. With respect to 100 parts by mass of the polyvinyl alcohol-based polymer, 30 to 500 parts by mass of the adsorbent is contained. The polyvinyl alcohol-based fibers have a crystallinity of polyvinyl alcohol ranging from 30% to 60%, a diameter ranging from 5 μm to 1000 μm, and a specific surface area ranging from 10 m2/g to 2000 m2/g.

公开(公告)号：US20210292268A1

公开(公告)日：2021-09-23

申请号：US17259613

申请日：2019-07-24

申请人： KURARAY CO., LTD.

发明人： Naoya MINAMOTO ,  Yusuke MURATA

IPC分类号： C07C67/055

摘要： A method for producing a 1-acyloxy-2-methyl-2-propene represented by the following general formula (II), including reacting a carboxylic acid represented by the following general formula (I), isobutylene, and oxygen, in the presence of a catalyst, in a liquid phase, with an amount of the isobutylene used of more than 1 mol and 50 mol or less per 1 mol of the carboxylic acid.

公开(公告)号：US20210283805A1

公开(公告)日：2021-09-16

申请号：US17257697

申请日：2019-06-26

申请人： KURARAY CO., LTD.

发明人： Satoshi KATSUYA ,  Yosuke WASHITAKE ,  Ryokei ENDO

IPC分类号： B29B15/10 ,  B29C70/50 ,  C08J5/04

摘要： Disclosed is a fiber-reinforced resin composite body (1) including: a thermosetting resin (2); a plurality of reinforcing fiber layers (4) stacked in the thermosetting resin (2); and a thermoplastic resin (5) dispersed in a form of particles in the thermosetting resin (2) between the plurality of reinforcing fiber layers (4).

公开(公告)号：US11111319B2

公开(公告)日：2021-09-07

申请号：US16089441

申请日：2017-03-30

申请人： KURARAY CO., LTD.

发明人： Yusuke Amano ,  Takumi Takayama ,  Kazuhiko Maekawa

IPC分类号： C08F16/06 ,  C08F116/06

摘要： A polyvinyl alcohol has a number-average molecular weight (Mn) from 4,400 to 440,000, a molecular weight distribution (Mw/Mn) from 1.05 to 1.70, a degree of saponification from 80 to 99.99 mol %, and a carbon-carbon double bond content (X) of 0.1 mol % or less based on total monomer units, and satisfying a formula (1) below. A polyvinyl alcohol, having a narrow molecular weight distribution and a high number-average molecular weight with good hue, and a method for producing the same are thus provided. X·Mn≤1000  (1)

公开(公告)号：US11078309B2

公开(公告)日：2021-08-03

申请号：US16619152

申请日：2018-06-05

申请人： KURARAY CO., LTD.

发明人： Yuki Tachibana ,  Yusuke Amano ,  Kazuhiko Maekawa

IPC分类号： C08F8/32 ,  C08F16/06

摘要： There is provided a vinyl alcohol-based polymer having an olefin in side chain, comprising 0.001 to 10 mol % of a structural unit represented by Formula (1) based on the total amount of structural units, wherein the total carbon number of X, R1, R2, R3 and R4 is 2 or more. The vinyl alcohol-based polymer having an olefin in side chain has excellent storage stability, good solubility in water or an organic solvent even after thermal treatment, and excellent reactivity to high energy beam. In Formula (1), X represents an optionally substituted divalent aliphatic hydrocarbon group, an optionally substituted divalent alicyclic hydrocarbon group, an optionally substituted divalent aromatic hydrocarbon group, or a group consisting of two or more of these groups which are linked via at least one bond selected from the group consisting of an amide bond, an ester bond, an ether bond, and a sulfide bond; R1, R2, R3 and R4, independently of each other, represents a hydrogen atom, an optionally substituted aliphatic hydrocarbon group, an optionally substituted alicyclic hydrocarbon group, or an optionally substituted aromatic hydrocarbon group; and X, R1, R2, R3 and R4 can be arbitrarily combined to form a ring structure).

公开(公告)号：US20210230314A1

公开(公告)日：2021-07-29

申请号：US17059566

申请日：2019-05-29

申请人： KURARAY CO., LTD.

发明人： Naoto Nishida ,  Kazuyuki Somemiya

IPC分类号： C08F2/06 ,  C08F218/08 ,  C08F210/02 ,  C08F2/01

摘要： A method of continuously producing an ethylene-vinyl acetate copolymer in a polymerization vessel containing a reaction liquid containing ethylene, vinyl acetate, a polymerization initiator and methanol, the polymerization vessel being connected via piping to a heat exchanger circulating a coolant, the method includes the steps of: supplying ethylene, the polymerization initiator and methanol to the polymerization vessel; introducing pressurized gas containing ethylene present in a gas phase portion of the polymerization vessel into the heat exchanger; supplying vinyl acetate cooled to between −50° C. and 23° C. to an upper portion of the heat exchanger; flowing vinyl acetate down in the heat exchanger while absorbing ethylene; letting vinyl acetate dissolving ethylene out of a bottom portion of the heat exchanger and adding to the reaction liquid in the polymerization vessel; and taking the reaction liquid out of the polymerization vessel. This provides a method of efficiently removing heat during polymerization of an ethylene-vinyl acetate copolymer.

公开(公告)号：US11052638B2

公开(公告)日：2021-07-06

申请号：US16082087

申请日：2017-03-02

申请人： KURARAY CO., LTD.

发明人： Shinji Hiramatsu ,  Takahiro Nakashima ,  Tatsuya Sunamoto ,  Shigeaki Suzuki

IPC分类号： C09K19/38 ,  B32B15/08 ,  B32B15/20 ,  C23C14/20 ,  C23C14/28 ,  C23C28/02 ,  C25D3/38 ,  C25D5/56 ,  H05K1/03 ,  H05K3/46

摘要： A metal-clad laminate (1) includes a thermoplastic liquid crystal polymer film (2), a metal deposition layer (4) formed on one surface of the thermoplastic liquid crystal polymer film (2), and metal foil (6) laminated to the other surface of the thermoplastic liquid crystal polymer film (2).