公开(公告)号：US20190330396A1

公开(公告)日：2019-10-31

申请号：US16473682

申请日：2017-12-27

申请人： KURARAY CO., LTD.

发明人： Tadahito FUKUHARA

IPC分类号： C08F114/06 ,  C08J3/05 ,  C08L29/04

摘要： A method for producing a vinyl polymer by suspension-polymerizing a vinyl compound in the presence of a dispersion stabilizer, wherein the dispersion stabilizer contains a polyvinyl alcohol and a composition containing a modified polyvinyl alcohol and a compound; the modified polyvinyl alcohol contains double bonds derived from an unsaturated carboxylic acid or a derivative thereof in side chains; the compound is a compound having two or more hydroxy groups bonded to a conjugated double bond; the modified polyvinyl alcohol has a saponification degree and a viscosity-average polymerization degree different from those of the polyvinyl alcohol; a content of the compound in the composition is 0.001 parts by mass or more and less than 5 parts by mass based on 100 parts by mass of the modified polyvinyl alcohol; and a mass ratio of the composition to the polyvinyl alcohol is 50/50 to 90/10.

公开(公告)号：US20220153891A1

公开(公告)日：2022-05-19

申请号：US17603699

申请日：2020-04-13

申请人： KURARAY CO., LTD.

发明人： Tadahito FUKUHARA ,  Tatsuya TANIDA

IPC分类号： C08F216/06 ,  C08F8/12 ,  C08F6/10 ,  C08F2/01 ,  C08L23/08 ,  C08K3/34 ,  C08K3/22 ,  C09J129/04 ,  C09D129/04

摘要： An ethylene-vinyl alcohol copolymer may have an ethylene unit content of 1 mol % or more and less than 15 mol %, a saponification degree of 85 mol % or more and less than 99.9 mol %, and a viscosity-average degree of polymerization of 200 or more and less than 3000. The copolymer may contain a molecule containing a structure (I) Y being H or —CH3, at an end; and a molecule containing a structure (II) Z being H or —CH3, at an end, a total content of the structure (I) and the structure (II) in all monomer units is 0.001 mol % or more and less than 0.1 mol %, and a molar ratio R [I/(I+II)] of the structure (I) to the total of the structure (I) and the structure (II) satisfies formula (1): R

公开(公告)号：US20210163654A1

公开(公告)日：2021-06-03

申请号：US17046612

申请日：2019-04-10

申请人： KURARAY CO., LTD.

发明人： Tadahito FUKUHARA

IPC分类号： C08F290/12 ,  C08F261/04 ,  C08L27/06

摘要： 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：US20190338115A1

公开(公告)日：2019-11-07

申请号：US16473773

申请日：2017-12-27

申请人： KURARAY CO., LTD.

发明人： Tadahito FUKUHARA ,  Keisuke MORIKAWA ,  Taeko KAHARU

IPC分类号： C08L29/04 ,  C08F2/20 ,  C08F2/44 ,  C08K5/053 ,  C08F216/06 ,  D21H27/00 ,  D21H19/60

摘要： There is provided a composition (C) comprising a modified PVA (A) and a compound (B), wherein the modified PVA (A) contains 0.01 mol % or more and less than 2 mol % of double bonds derived from an unsaturated carboxylic acid or a derivative thereof in side chains; the compound (B) is a compound having a conjugated double bond and two or more hydroxy groups bonded to the conjugated double bond, or a salt or oxide thereof; and a content of the compound (B) in the composition (C) is 0.001 parts by mass or more and less than 5 parts by mass based on 100 parts by mass of the modified PVA (A). The composition (C) has excellent hue, contains less insolubles in water, and has excellent water solubility.

公开(公告)号：US20190249028A1

公开(公告)日：2019-08-15

申请号：US16316823

申请日：2017-07-05

申请人： Akio KAMEYAMA ,  KURARAY CO., LTD. ,  FUJI SILYSIA CHEMICAL LTD.

发明人： Tadahito FUKUHARA ,  Keisuke MORIKAWA ,  Mitsuteru OGAWA ,  Mutsuhiro ITO ,  Yoshio NAKANO ,  Akio KAMEYAMA

IPC分类号： C09D129/04 ,  C09D5/16 ,  C08K3/22 ,  C08K3/36

摘要： The present invention provides an aquatic organism repellent paint composition having good dispersion stability and capable of maintaining the repellent effect on aquatic organisms over a long time. The present invention relates to an aquatic organism repellent paint composition containing: a vinyl alcohol polymer (A) having a degree of saponification of more than 65 mol % and less than 88 mol %; an inorganic oxide (B); and a solvent (C).

公开(公告)号：US20170335030A1

公开(公告)日：2017-11-23

申请号：US15524336

申请日：2015-11-11

申请人： KURARAY CO., LTD.

发明人： Tadahito FUKUHARA

IPC分类号： C08F116/06 ,  C08F114/06 ,  C08L29/04 ,  C08F8/12 ,  C08F2/20 ,  C08F18/08

CPC分类号： C08F116/06 ,  B01F17/0028 ,  B01F17/0092 ,  C08F2/20 ,  C08F2/38 ,  C08F8/00 ,  C08F8/12 ,  C08F14/06 ,  C08F18/08 ,  C08F114/06 ,  C08F216/06 ,  C08L29/04 ,  C08L2205/025 ,  C08F118/08 ,  C08F218/08

摘要： A dispersion stabilizer for suspension polymerization is provided that includes a vinyl alcohol-based polymer (A), wherein a 0.1 mass % concentration aqueous solution of the polymer (A) has an absorbance (a1) of less than 0.25 at a wavelength of 280 nm, the aqueous solution has an absorbance (a2) of less than 0.030 at a wavelength of 320 nm, the polymer (A) has a degree of saponification of not less than 68 mol % and not more than 98 mol %, the polymer (A) has a viscosity-average degree of polymerization of more than 1500 and less than 4500, and the polymer (A) in powder form has a YI value of not less than 5. The dispersion stabilizer is capable of producing a vinyl-based resin that is excellent in polymerization stability, has a small particle size, and has an improved bulk density.

公开(公告)号：US20230331878A1

公开(公告)日：2023-10-19

申请号：US18023512

申请日：2021-07-21

申请人： KURARAY CO., LTD.

发明人： Atsushi INATOMI ,  Takuro KARAKIDA ,  Tadahito FUKUHARA ,  Satomi OHTA

IPC分类号： C08F236/10 ,  C08F2/26 ,  C08F8/42

CPC分类号： C08F8/42 ,  C08F2/26 ,  C08F236/10 ,  C08F2810/40

摘要： A method for producing a polymer composition including modified polymers having a boron-containing functional group includes anionically polymerizing at least one monomer selected from the group consisting of conjugated dienes and aromatic vinyl compounds in the presence of an active metal or an active metal compound capable of catalyzing anionic polymerization to produce a terminal-active polymer (Z), and reacting the terminal-active polymer (Z) obtained with a boric acid compound having at least two or more partial structures represented by the formula B-O-R (B is boron, O is oxygen, and R is an organic group) and having a Taft’s steric parameter Es of -0.30 or less with respect to at least one of Rs bonded to the oxygen atom in the partial structures.

公开(公告)号：US20200247915A1

公开(公告)日：2020-08-06

申请号：US16636481

申请日：2018-08-06

申请人： KURARAY CO., LTD.

发明人： Tadahito FUKUHARA ,  Yusuke AMANO

IPC分类号： C08F2/20 ,  C08F2/18 ,  C08F2/44 ,  C08F8/12 ,  C08F2/38 ,  C08F214/06

摘要： 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：US20170029540A1

公开(公告)日：2017-02-02

申请号：US15302281

申请日：2015-04-08

申请人： KURARAY CO., LTD. ,  KURARAY EUROPE GMBH

发明人： Tadahito FUKUHARA ,  Yosuke KUMAKI ,  Samuel MICHEL ,  Dirk HARTMANN

IPC分类号： C08F114/06

CPC分类号： C08F114/06 ,  C08F2/18 ,  C08F2/20 ,  C08F14/06 ,  C08F2400/00

摘要： A dispersion stabilizer in the present invention contains an aqueous emulsion (a) obtained by dispersing a polymer (A) having an ethylenically unsaturated monomer unit in an aqueous medium, a PVA (B) having a degree of saponification of 65 mol % or more and less than 82 mol % and a viscosity-average degree of polymerization of 250 or more and less than 1500, and a PVA (C) having a degree of saponification of 82 mol % or more and less than 98 mol % and a viscosity-average degree of polymerization of 1500 or more and less than 4000. The dispersion stabilizer contains: 7 to 51 mass % of the polymer (A); 40 to 84 mass % of the PVA (B); and 9 to 53 mass % of the PVA (C), with respect to a total amount of the polymer (A), the PVA (B), and the PVA (C). A vinyl resin satisfying required performance can be obtained using the dispersion stabilizer.

摘要翻译： 本发明的分散稳定剂含有通过将具有烯键式不饱和单体单元的聚合物（A）分散在水性介质中而得到的水性乳液（a），皂化度为65摩尔％以上的PVA（B） 低于82摩尔％，粘均聚合度为250以上且小于1500的皂化度为82摩尔％以上且小于98摩尔％的PVA（C），粘度平均值 聚合度为1500以上且小于4000.分散稳定剂含有：7〜51质量％的聚合物（A）; 40〜84质量％的PVA（B）; 相对于聚合物（A），PVA（B）和PVA（C）的总量，为9〜53质量％的PVA（C）。 使用分散稳定剂可以得到满足所需性能的乙烯基树脂。

公开(公告)号：US20160194412A1

公开(公告)日：2016-07-07

申请号：US14910595

申请日：2014-08-06

申请人： KURARAY CO., LTD.

发明人： Tadahito FUKUHARA ,  Yosuke KUMAKI

IPC分类号： C08F2/20 ,  C08F114/06 ,  C08L29/04

CPC分类号： C08F2/20 ,  B01F17/0028 ,  C08F2/30 ,  C08F8/12 ,  C08F18/04 ,  C08F114/06 ,  C08L29/04 ,  C08L2201/54

摘要： The present invention provides an easy-to-handle dispersion stabilizer for suspension polymerization that meets the following requirements: even if the amount of the dispersion stabilizer for suspension polymerization used for suspension polymerization of a vinyl compound is small, the resulting vinyl resin has high plasticizer absorptivity and is easy to work with; it is easy to remove residual monomer components from the resulting vinyl resin; and the resulting vinyl resin contains fewer coarse particles. The present invention relates to a dispersion stabilizer for suspension polymerization in the form of an aqueous liquid. This dispersion stabilizer contains, at a concentration of 20 mass % or more and 50 mass % or less, a PVA having a degree of saponification of 35 mol % or more and 65 mol % or less, a viscosity average degree of polymerization of 100 or more and 480 or less, a terminal aliphatic hydrocarbon group having 6 to 12 carbon atoms, and a block character of residual ester groups of 0.5 or more. In this dispersion stabilizer, the viscosity average degree of polymerization (P) of the PVA and the degree of modification (S) of the aliphatic hydrocarbon group satisfies 50≦S×P/1.880≦100.

摘要翻译： 本发明提供一种易于处理的用于悬浮聚合的分散稳定剂，其满足以下要求：即使用于乙烯基化合物的悬浮聚合的悬浮聚合用分散稳定剂的量少，所得乙烯基树脂具有高增塑剂 吸收性好，易于使用; 从所得乙烯基树脂中容易除去残留的单体组分; 所得到的乙烯基树脂含有较少的粗颗粒。 本发明涉及一种水性液体形式的悬浮聚合分散稳定剂。 该分散稳定剂含有皂化度为35摩尔％以上且65摩尔％以下的PVA，其粘度平均聚合度为100以上，聚合度为20质量％以下且50质量％以下 更多且480以下的碳原子数为6〜12的末端脂肪族烃基，残基酯基的嵌段特征为0.5以上。 在该分散稳定剂中，PVA的粘均聚合度（P）和脂肪族烃基的改性度（S）满足50＆lt; nlE; S×P / 1.880＆nlE; 100。