-
公开(公告)号：US11434310B2
公开(公告)日：2022-09-06
申请号：US16636481
申请日：2018-08-06
Applicant: KURARAY CO., LTD.
Inventor： Tadahito Fukuhara , Yusuke Amano
Abstract: The present invention provides a dispersion stabilizer for suspension polymerization that, when used for suspension polymerization of a vinyl compound, provides excellent polymerization stability, and can produce a vinyl polymer having a reduced number of coarse particles, and a reduced number of fisheyes when molded into a sheet form. The present invention also provides a method therewith. The present invention relates to a dispersion stabilizer for suspension polymerization of a vinyl compound, the dispersion stabilizer comprising a vinyl alcohol polymer (A) having a viscosity-average degree of polymerization of more than 400 and less than 1,000, a degree of saponification of more than 67 mol % and less than 78 mol %, 0.02 mol % to 1.0 mol % of a group having an ethylenic double bond in its side chain, and an absorbance (x) at 280 nm of more than 0.17 and less than 0.65 in an ultraviolet absorption spectrum of a 0.1 mass % aqueous solution.
-
公开(公告)号：US10759910B2
公开(公告)日：2020-09-01
申请号：US15745011
申请日：2016-07-11
Inventor： Mitsuteru Ogawa , Shinji Yamamoto , Kiyoshi Kuroda , Mutsuhiro Ito , Yoshio Nakano , Akio Kameyama , Tadahito Fukuhara , Keisuke Morikawa
IPC: C08J3/02 , C08L101/06 , C09D201/00 , C09D5/16 , C08J3/12 , C09D129/04 , C09D171/08 , C08K3/22 , C08K3/36
Abstract: A method for manufacturing an organism adhesion reduction paint includes a first process of gelling a raw material composition that includes polyvinyl alcohol and at least one of a hydroxyl group-containing inorganic compound or an inorganic oxide; a second process of drying and subsequently pulverizing a resulting product in the first process to thereby obtain a composite gel fine powder; and a third process of adding the composite gel fine powder to a main component of a two-component urethane paint and stirring, to thereby prepare a main component of the organism adhesion reduction paint, and also adding a curing agent immediately before use.
-
3.发明授权公开(公告)号：US10604592B2
公开(公告)日：2020-03-31
申请号：US15302307
申请日：2015-04-08
Applicant: KURARAY CO., LTD.
Inventor： Tadahito Fukuhara , Yosuke Kumaki , Samuel Michel , Dirk Hartmann
IPC: C08F2/20 , C08F2/24 , C08F283/06 , C08L51/00 , C08F14/06 , C08F18/04 , C08F18/08 , C08F2/30 , C08F2/18 , C08L29/04
Abstract: Provided is a dispersion stabilizer for suspension polymerization comprising an aqueous emulsion containing a dispersant (A), a dispersoid (B), a graft polymer (C), and an aqueous medium, wherein the dispersant (A) contains a surfactant, the dispersoid (B) contains a polymer having an ethylenically unsaturated monomer unit, the graft polymer (C) is obtained by graft polymerization of the ethylenically unsaturated monomer with the dispersant (A), a mass ratio [A/(A+B+C)] is 0.001 or more and less than 0.18, a mass ratio [C/(A+B+C)] is 0 or more and less than 0.04, and the total content of the dispersant (A), the dispersoid (B), and the graft polymer (C) is 35 to 70 mass %. A vinyl polymer to be obtained by suspension polymerization of a vinyl compound using the dispersion stabilizer has good plasticizer absorption. Further, the number of fish-eyes that occur when the vinyl polymer is formed is small, and the hue deterioration is also suppressed. Further, the dispersion stabilizer also has excellent handleability.
-
公开(公告)号：US20240309248A1
公开(公告)日：2024-09-19
申请号：US18658494
申请日：2024-05-08
Applicant: KURARAY CO., LTD.
Inventor： Tadahito Fukuhara , Tatsuya Tanida
IPC: C09J129/04 , C08F8/12 , C08F210/02 , C08F216/06 , C08F218/08 , C08K3/34 , C08K5/098 , C08L29/04
CPC classification number: C09J129/04 , C08F210/02 , C08F216/06 , C08F218/08 , C08K5/098 , C08L29/04 , C08F8/12 , C08K3/346
Abstract: The present invention provides a resin material that comprises an ethylene-modified vinyl alcohol polymer as a main component, and that excels in hue, water solubility, and aqueous-solution viscosity stability. The present invention also provides an aqueous solution and an adhesive comprising such a resin material. The present invention relates to a resin material comprising an ethylene-modified vinyl alcohol polymer and sodium acetate, wherein:
the ethylene-modified vinyl alcohol polymer has an ethylene unit content of 1 10 mol % or more and less than 15 mol %, a viscosity-average degree of polymerization of 200 or more and less than 3,000, and a degree of saponification of 80 mol % or more and less than 99.9 mol %, and comprises 0.0005 mol % or more and 0.10 mol % or less of a propyl group at one end of the polymer, and
the sodium acetate content is 0.05 mass % or more and less than 2 mass %.-
公开(公告)号：US11643781B2
公开(公告)日：2023-05-09
申请号：US16498879
申请日：2018-03-29
Applicant: KURARAY CO., LTD.
Inventor： Keisuke Morikawa , Taeko Kaharu , Tadahito Fukuhara , Yuki Tachibana
CPC classification number: D21H19/12 , C08F8/02 , C08F16/06 , D21H19/32 , D21H27/001
Abstract: Release paper base paper includes a substrate; and a coating agent containing a modified polyvinyl alcohol (A) and sodium acetate, the substrate coated with the coating agent, wherein the modified polyvinyl alcohol (A) has 0.005 mol % or more and less than 10 mol % of double bonds derived from unsaturated carboxylic acid or a derivative thereof (B) in side chains, has 1.4 mol % or more and 2.0 mol % or less of 1,2-glycol bond, units, and is water soluble, and a content of the sodium acetate relative to the modified polyvinyl alcohol (A) is 0.01 mass % or more and 10 mass % or less. The release paper base paper of the present invention is excellent in sealing properties for silicone. Use of the release paper base paper allows acceleration of curing of silicone in a release layer and improvement in adhesion between the substrate and the release layer.
-
Patent Agency Ranking
公开(公告)号：US10988606B2
公开(公告)日：2021-04-27
申请号：US16337224
申请日：2017-04-13
Applicant: KURARAY CO., LTD.
Inventor： Shinsuke Nii , Yosuke Kumaki , Junpei Horiguchi , Tadahito Fukuhara , Tatsuya Tanida
IPC: C08L29/04 , C08F8/12 , C08F216/06 , C08F222/10 , C08K5/00 , C08F222/00 , C08F8/16
Abstract: A modified vinyl alcohol polymer powder having a structural unit derived from a derivative of an ethylenically unsaturated dicarboxylic acid, and containing a reduced amount of methanol, and a trace amount of a component that does not dissolve in water. The present invention relates to a modified vinyl alcohol polymer powder containing a structural unit derived from a derivative (A) of an ethylenically unsaturated dicarboxylic acid in a content (X) of 0.05 mol % or more and 10 mol % or less, and having a degree of saponification of 80.0 mol % or more and 99.9 mol % or less, the modified vinyl alcohol polymer powder has a methanol content of 0.01 weight % or more and less than 3.0 weight %, the modified vinyl alcohol polymer powder contains 0.1 ppm or more and less than 2,000 ppm of a component that is insoluble in a 90° C., 5 weight % aqueous solution.
-
公开(公告)号：US20180223051A1
公开(公告)日：2018-08-09
申请号：US15745011
申请日：2016-07-11
Inventor： Mitsuteru Ogawa , Shinji Yamamoto , Kiyoshi Kuroda , Mutsuhiro Ito , Yoshio Nakano , Akio Kameyama , Tadahito Fukuhara , Keisuke Morikawa
IPC: C08J3/02 , C08J3/12 , C08K3/22 , C08K3/36 , C09D129/04 , C09D171/08
Abstract: A composite gel in one aspect of the present disclosure comprises a substance prepared by gelling a raw material composition that comprises, as main components, a hydroxyl group-containing organic polymer compound and one of a hydroxyl group-containing inorganic compound and an inorganic oxide. A method for manufacturing the composite gel in one aspect of the present disclosure comprises a first process of gelling a raw material composition that comprises, as main components, a hydroxyl group-containing organic polymer compound and at least one of a hydroxyl group-containing inorganic compound or an inorganic oxide; and a second process of drying and subsequently pulverizing a resulting product in the first process to thereby obtain a composite gel fine powder.
-
公开(公告)号：US11649313B2
公开(公告)日：2023-05-16
申请号：US17046612
申请日：2019-04-10
Applicant: KURARAY CO., LTD.
Inventor： Tadahito Fukuhara
IPC: C08F290/12 , C08F261/04 , C08L27/06
CPC classification number: C08F290/12 , C08F261/04 , C08L27/06
Abstract: A composition containing: modified polyvinyl alcohol; and unsaturated monocarboxylic acid or a salt thereof, wherein the modified polyvinyl alcohol has a viscosity-average degree of polymerization of from 400 to 3500, has a degree of saponification of from 68 mol % to 99.9 mol %, and contains from 0.01 mol % to 1.50 mol % of an acryloyl group or a methacryloyl group in a side chain, the unsaturated monocarboxylic acid or a salt thereof is at least one selected from the group consisting of acrylic acid, methacrylic acid, sodium acrylate, and sodium methacrylate, and in the composition, a mass ratio of the modified polyvinyl alcohol/the unsaturated monocarboxylic acid or a salt thereof is from 82/18 to 99.9/0.1. The composition is thus provided that is excellent in water solubility and storage stability and polymerization stability of a vinyl compound and contains the modified polyvinyl alcohol.
-
公开(公告)号：US20210179900A1
公开(公告)日：2021-06-17
申请号：US17054838
申请日：2019-05-24
Applicant: KURARAY CO., LTD.
Inventor： Tadahito Fukuhara , Tatsuya Tanida
IPC: C09J129/04 , C08F216/06 , C08K5/098
Abstract: The present invention provides a resin material that comprises an ethylene-modified vinyl alcohol polymer as a main component, and that excels in hue, water solubility, and aqueous-solution viscosity stability. The present invention also provides an aqueous solution and an adhesive comprising such a resin material. The present invention relates to a resin material comprising an ethylene-modified vinyl alcohol polymer and sodium acetate, wherein: the ethylene-modified vinyl alcohol polymer has an ethylene unit content of 1 mol % or more and less than 15 mol %, a viscosity-average degree of polymerization of 200 or more and less than 3,000, and a degree of saponification of 80 mol % or more and less than 99.9 mol %, and comprises 0.0005 mol % or more and 0.10 mol % or less of a propyl group at one end of the polymer, and the sodium acetate content is 0.05 mass % or more and less than 2 mass %.
-
10.发明授权公开(公告)号：US09777080B2
公开(公告)日：2017-10-03
申请号：US14415329
申请日：2013-07-17
Applicant: KURARAY CO., LTD.
Inventor： Tadahito Fukuhara , Yousuke Kumaki
IPC: C08F14/06 , C08F2/20 , C08F8/12 , C08F114/06 , C08F118/08 , C08F214/18 , C08F18/00 , C08L29/04 , C08F116/06 , C08F16/06 , C08F18/08 , C08F2/38
CPC classification number: C08F14/06 , C08F2/20 , C08F2/38 , C08F8/12 , C08F16/06 , C08F18/00 , C08F18/08 , C08F114/06 , C08F116/06 , C08F118/08 , C08F214/18 , C08L29/04 , C08L2205/025
Abstract: A dispersion stabilizer for suspension polymerization of vinyl compounds comprising a vinyl alcohol polymer (A) which has a saponification degree of 30 mol % or more and less than 60 mol % and a viscosity-average polymerization degree (P) of more than 200 and less than 600, and has a terminal alkyl group having 6 to 18 carbon atoms, and in which a content of monomer units having an oxyalkylene group is 0.3 mol % or less and the relationship between the viscosity-average polymerization degree (P) and a modification rate (S) (mol %) of the alkyl group satisfies Formula (1). Thus, there can be provided a dispersion stabilizer for suspension polymerization with which, during suspension polymerization of vinyl compounds including vinyl chloride, even when it is used in a small amount, the absorbency of a plasticizer is high, resulting in easy processing and formation of coarse particles is little and the remaining monomer components can be easily removed. 50≦S×P/1.880
-
-
-
-
-
-
-
-
-
Search Results
23
records
(took 0.037 seconds)
