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公开(公告)号：US12105320B2
公开(公告)日：2024-10-01
申请号：US17630686
申请日：2020-07-29
申请人： KURARAY CO., LTD.
发明人： Masashi Akari , Katsuhiro Fujita , Ryuichi Iwakawa
CPC分类号： G02B6/02033 , C09K11/06 , G01T1/2018 , C09K2211/1018
摘要： A plastic wavelength shifting fiber includes a core containing a fluorescent agent having a peak of a fluorescence spectrum in a wavelength range of 450 to 550 nm, and a cladding covering an outer peripheral surface of the core and has a refractive index lower than that of the core. A sum of the number of carbon and oxygen atoms of the fluorescent agent is 10 to 25, and a quantum yield QE of the fluorescent agent and an overlap parameter OL thereof defined by Formula (2) satisfy Formula (1):
OL×(1−QE)-
公开(公告)号：US20240299904A1
公开(公告)日：2024-09-12
申请号：US18291804
申请日：2022-07-26
申请人： KURARAY CO., LTD.
IPC分类号： B01J20/20 , B01J20/28 , C02F1/28 , C02F101/36
CPC分类号： B01J20/20 , B01J20/28004 , B01J20/28016 , B01J20/2803 , B01J20/28042 , B01J20/28064 , B01J20/28066 , B01J20/28071 , B01J20/28073 , B01J20/28076 , C02F1/283 , C02F2101/36
摘要： A water purification filter according to the present invention contains activated carbon and one or more fibrous binders, in which the fibrous binder has a maximum fiber length of 3.0 mm or more and has one or more physical properties (a) to (c) shown below: (a) having an average shape of 80% or less; (b) having an average fiber width of 20 μm or less; and (c) in a fiber length distribution, having a ratio of a frequency of fibers having a length of 0.2 mm to 0.5 mm to a frequency of fibers having a length of 1.0 mm to 2.0 mm of 1.0 or more.
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公开(公告)号：US12077625B2
公开(公告)日：2024-09-03
申请号：US17283191
申请日：2019-10-04
申请人： KURARAY CO., LTD.
发明人： Moe Kawahara , Makoto Akai , Kanayo Nakada , Tomohiro Ono
IPC分类号： C08F299/04 , C08J3/12 , C08L33/12 , C08L53/00
CPC分类号： C08F299/0492 , C08J3/12 , C08J2353/00 , C08L33/12 , C08L53/00 , C08L53/00 , C08L33/12
摘要： Pellets of an acrylic block copolymer (I) having a polymer block (A1) containing methacrylic acid ester units and a polymer block (B1) containing acrylic acid ester units, and an acrylic polymer (II) having 35 mass % or more methyl methacrylate units are provided. The polymer block (B1) is made of methyl acrylate units and acrylic acid ester units of formula CH2═CH—COOR1 (1), wherein R1 represents a C4-C12 alkyl group. A shaped article prepared with the pellets is also provided.
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公开(公告)号：US12065517B2
公开(公告)日：2024-08-20
申请号：US17267267
申请日：2019-09-03
申请人： KURARAY CO., LTD.
发明人： Yuji Okamoto , Yoshimi Umemura
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.
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公开(公告)号：US20240270933A1
公开(公告)日：2024-08-15
申请号：US18559722
申请日：2022-05-09
申请人： KURARAY CO., LTD.
发明人： Shuichi SUNAGA , Yuta MATSUSHITA , Wenjie LU
IPC分类号： C08K3/38 , B32B1/08 , B32B27/08 , B32B27/10 , B32B27/16 , B32B27/30 , B32B27/32 , B65D65/40 , C08J5/18
CPC分类号： C08K3/38 , B32B1/08 , B32B27/08 , B32B27/10 , B32B27/16 , B32B27/306 , B32B27/308 , B32B27/32 , B65D65/40 , C08J5/18 , B32B2250/24 , B32B2250/40 , B32B2255/10 , B32B2255/26 , B32B2307/31 , B32B2439/46 , B32B2439/70 , B32B2457/12 , B32B2597/00 , C08J2333/12 , C08K2003/387
摘要： A resin composition comprising: a resin (A) having 30 mol % or more of a structural unit represented by a formula (1) below, and a boron compound (B), the boron compound (B) containing a boron element in an amount of 0.01 to 2,000 μmol per gram of the resin (A).
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公开(公告)号：US12054645B2
公开(公告)日：2024-08-06
申请号：US17047855
申请日：2019-04-16
申请人： KURARAY CO., LTD.
IPC分类号： C09J11/04 , C08F216/06 , C08K5/01 , C08K5/09 , C08L29/04 , C09J129/04 , C08K3/34
CPC分类号： C09J129/04 , C08F216/06 , C09J11/04 , C08K3/346
摘要： An ethylene-vinyl alcohol copolymer may have an ethylene unit content of 1 mol % or more and less than 20 mol %, a viscosity-average polymerization degree of 200 to 5000 and a saponification degree of 80 to 99.7 mol %. A block character of ethylene units in the ethylene-vinyl alcohol copolymer may be 0.90 to 0.99. Such an ethylene-vinyl alcohol copolymer may have excellent high-speed coating ability and water-resistant adhesiveness, particularly when being used as an adhesive.
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公开(公告)号：US12049533B2
公开(公告)日：2024-07-30
申请号：US16965481
申请日：2019-01-28
申请人： KURARAY CO., LTD.
发明人： Takuro Niimura , Masashi Akari , Hiroshi Ozawa
IPC分类号： C08F6/22 , C08F2/24 , C08F220/14 , C08F220/18 , C08F265/06 , C08F285/00 , C08J5/18 , C08L33/12
CPC分类号： C08F6/22 , C08F2/24 , C08F220/14 , C08F220/18 , C08F265/06 , C08F285/00 , C08J5/18 , C08L33/12 , C08F220/14 , C08F220/1804 , C08F220/40 , C08F285/00 , C08F220/14 , C08F220/1804 , C08F285/00 , C08F220/14 , C08F6/22 , C08L51/00 , C08L33/12 , C08L33/08 , C08L33/12 , C08L2205/025
摘要： The present invention provides a multilayered acrylic polymer coagulate characterized in that the coagulate has a bulk density of 0.3 to 0.6 g/cm3 and a median diameter of 50 to 400 μm and contains particles having a particle diameter of 75 or less in a proportion of 50% or less, and the amount of alkali metal and alkaline earth metal contained in the coagulate satisfies the following formula (1):
Σ(N/a)×(120−Tg)≤100 (1)
wherein
N represents the amount of alkali metal and alkaline earth metal contained in the coagulate (mmol/kg);
Tg represents the glass transition temperature (° C.) of the acetone-soluble matter of the coagulate; and
a represents the valency of the alkali metal and alkaline earth metal contained in the coagulate.-
公开(公告)号：US12043956B2
公开(公告)日：2024-07-23
申请号：US16964349
申请日：2019-02-04
申请人： KURARAY CO., LTD.
发明人： Kimio Nakayama , Hiroyuki Hishida
CPC分类号： D06N3/0011 , D06N3/0036 , D06N3/0075 , D06N3/14 , D06N2203/068 , D06N2209/0823 , D06N2209/1635 , D06N2211/28
摘要： Disclosed is a napped artificial leather including: a non-woven fabric containing polyester fibers having an average fineness of 0.07 to 0.9 dtex; and an elastic polymer applied in the non-woven fabric, wherein the polyester fibers contain 0.5 to 10 mass % of a dark color pigment, the napped artificial leather has a napped surface on which the polyester fibers on at least one side thereof are napped, and the napped surface has a lightness L* value based on the L*a*b* color system, of ≤20, and the napped artificial leather has a peel strength of 3 kg/cm or more, and a grade of color difference, determined using a Grey scale for assessing staining in an evaluation of color migration to a multifiber adjacent fabric (co-woven fabric No. 1; the same applied to the following) during pressurization under heating in a wet state under a load of 4 kPa at 200° C. for 60 seconds, of 4 or more.
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公开(公告)号：US12043706B2
公开(公告)日：2024-07-23
申请号：US17295537
申请日：2019-11-21
申请人： KURARAY CO., LTD.
发明人： Akio Fujita , Atsushi Inatomi , Kenta Toshinari , Goro Kobayashi
摘要： The present invention relates to monodisperse hydrogel particles containing a cross-linked product of a vinyl alcohol-based polymer having an ethylenically unsaturated group and an average degree of polymerization of 450 or more, the monodisperse hydrogel particles having an average particle size of 10 to 5,000 μm, and a coefficient of variation of a particle size distribution of 10% or less.
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公开(公告)号：US20240218097A1
公开(公告)日：2024-07-04
申请号：US18557186
申请日：2022-04-25
申请人： Kuraray Co., Ltd.
发明人： Misuzu FUJIMORI , Yuta TAOKA
摘要： A vinyl alcohol polymer including a structural unit derived from at least one selected from the group consisting of: a monomer having a carboxy group; and a derivative of the monomer, wherein the vinyl alcohol polymer has: a minimum degree of branching of 0.93 or less within a range of an absolute molecular weight being 200,000 or more and 800,000 or less; a viscosity-average degree of polymerization of 750 or less; and a degree of saponification of 65 mol % or more.
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