公开(公告)号：US20230021123A1

公开(公告)日：2023-01-19

申请号：US17778346

申请日：2020-11-16

Applicant: KURARAY CO., LTD.

Inventor： Shinsuke Nii

IPC: C08F16/06 ,  C08J3/12

Abstract: Provided by the present invention are a dispersant for suspension polymerization which enables production of vinyl polymer particles having a small particle diameter at a small added amount, a method for producing such a dispersant for suspension polymerization, and a method for producing vinyl polymer particles by using such a dispersant for suspension polymerization.

公开(公告)号：US20140243462A1

公开(公告)日：2014-08-28

申请号：US14351734

申请日：2012-10-11

Applicant: KURARAY CO., LTD.

Inventor： Yuta Taoka ,  Shinsuke Nii ,  Masato Nakamae

IPC: C08K5/06 ,  C08K3/20 ,  C08K5/42

CPC classification number: C08K5/42 ,  C08F8/12 ,  C08F216/06 ,  C08K3/20 ,  C08K5/06 ,  C08L71/02 ,  C08F218/08 ,  C08F220/54 ,  C08L29/04

Abstract: An alkyl-modified PVA solution is provided which has low viscosity at high temperatures leading to superior handleability, accompanied by rapidly increased viscosity upon lowering of the temperature, even in the case in which the concentration of the alkyl-modified PVA in a solution is increased. An alkyl-modified vinyl alcohol polymer solution containing an alkyl-modified vinyl alcohol polymer, a surfactant and water. The alkyl-modified vinyl alcohol polymer has a monomer unit that includes an alkyl group having 5 to 29 carbon atoms. The percentage content of the monomer unit is no less than 0.05 mol % and no greater than 5 mol %. The degree of saponification of the alkyl-modified vinyl alcohol polymer is no less than 20 mol % and no greater than 99.99 mol %. The surfactant is a compound represented by the following formula (I) having hydrophilic groups X1 and X2, and an alkyleneoxy group having 3 to 5 carbon atoms (—R1—O—). X1—OR1—OmR2—X2  (I)

Abstract translation: 提供烷基改性的PVA溶液，其在高温下具有低粘度，导致优异的可操作性，伴随着降低温度时粘度迅速增加，即使在溶液中烷基改性PVA的浓度增加的情况下 。 含烷基改性乙烯醇聚合物，表面活性剂和水的烷基改性乙烯醇聚合物溶液。 烷基改性的乙烯醇聚合物具有包含碳原子数为5〜29的烷基的单体单元。 单体单元的含量百分比不小于0.05mol％且不大于5mol％。 烷基改性乙烯醇系聚合物的皂化度为20摩尔％以上，99.99摩尔％以下。 表面活性剂是具有亲水基团X1和X2以及具有3至5个碳原子的亚烷基氧基（-R1-O-）的下式（I）表示的化合物。 X1-OR1R1-O-mR2-X2（I）

公开(公告)号：US11155651B2

公开(公告)日：2021-10-26

申请号：US16969745

申请日：2019-02-05

Applicant: KURARAY CO., LTD.

Inventor： Shinsuke Nii

IPC: C08F8/36 ,  C08F16/06

Abstract: An object of the present invention is to provide a modified vinyl alcohol polymer having a sulfonic acid or a salt thereof, the polymer having notably improved water solubility as compared with a pre-modified vinyl alcohol polymer. A modified vinyl alcohol polymer (A) has in a side chain thereof a sulfonic acid group or a salt thereof, and in the modified vinyl alcohol polymer (A), a degree of modification with the sulfonic acid group or the salt thereof is 0.01 mol % or more and 10 mol % or less, and a block character of residual vinyl ester units is 0.55 or more and 1 or less.

公开(公告)号：US20230242688A1

公开(公告)日：2023-08-03

申请号：US18013063

申请日：2021-06-28

Applicant: KURARAY CO., LTD.

Inventor： Shinsuke Nii

IPC: C08F16/06 ,  C08F8/42 ,  C08F8/12 ,  C08F2/06

CPC classification number: C08F16/06 ,  C08F8/42 ,  C08F8/12 ,  C08F2/06

Abstract: Provided is a modified vinyl alcohol polymer which is superior in water solubility, viscosity stability of an aqueous solution thereof, and water resistance of a film thereof. The modified vinyl alcohol polymer has a group represented by the following formula (1). In the formula (1), R1 represents: an alkyl group having 1 to 8 carbon atoms; an alkoxy group having an alkyl group having 1 to 8 carbon atoms; a hydroxy group; or a group represented by -OM, wherein M represents an alkali metal or an alkaline earth metal, R2 represents a group including a siloxane structure, and n is an integer of 1 to 3.

公开(公告)号：US20240309141A1

公开(公告)日：2024-09-19

申请号：US18268573

申请日：2021-12-22

Applicant: Kuraray Co., Ltd.

Inventor： Shinsuke Nii

IPC: C08F261/04 ,  C08F2/20 ,  C08F8/42 ,  C08J3/24 ,  C09D129/04 ,  C09J7/40

CPC classification number: C08F261/04 ,  C08F8/42 ,  C08J3/242 ,  C08J3/247 ,  C08F2/20 ,  C08J2329/04 ,  C09D129/04 ,  C09J7/401 ,  C09J2429/005

Abstract: A modified vinyl alcohol polymer having a structural unit represented by the following formula (1), and having a water-insoluble content of 1,000 ppm or less. In the formula (1), X, Y, and Z each independently represent an alkyl group having 1 to 20 carbon atoms, an alkenyl group having 2 to 20 carbon atoms, a phenyl group, a benzyl group, a vinylphenyl group, a halogenated alkyl group having 1 to 20 carbon atoms, a halogenated phenyl group, an aminoalkyl group having 1 to 20 carbon atoms, a mercaptoalkyl group having 1 to 20 carbon atoms, an ureidoalkyl group having 2 to 20 carbon atoms, an isocyanate alkyl group having 2 to 8 carbon atoms, a group having 3 to 20 carbon atoms and containing an epoxy group, a group having 3 to 20 carbon atoms and containing an acrylamide group, a group having 4 to 20 carbon atoms and containing a methacrylamide group, an acetoxy group, or a group represented by —(CH2)n—O—R1 (wherein R1 represents, e.g., an alkyl group having 1 to 20 carbon atoms; and n represents an integer of 0 to 6).

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：US09303146B2

公开(公告)日：2016-04-05

申请号：US14351734

申请日：2012-10-11

Applicant: KURARAY CO., LTD

Inventor： Yuta Taoka ,  Shinsuke Nii ,  Masato Nakamae

IPC: C08K5/06 ,  C08K5/42 ,  C08K3/20 ,  C08F216/06 ,  C08L71/02

CPC classification number: C08K5/42 ,  C08F8/12 ,  C08F216/06 ,  C08K3/20 ,  C08K5/06 ,  C08L71/02 ,  C08F218/08 ,  C08F220/54 ,  C08L29/04

Abstract: An alkyl-modified PVA solution is provided which has low viscosity at high temperatures leading to superior handleability, accompanied by rapidly increased viscosity upon lowering of the temperature, even in the case in which the concentration of the alkyl-modified PVA in a solution is increased. An alkyl-modified vinyl alcohol polymer solution containing an alkyl-modified vinyl alcohol polymer, a surfactant and water. The alkyl-modified vinyl alcohol polymer has a monomer unit that includes an alkyl group having 5 to 29 carbon atoms. The percentage content of the monomer unit is no less than 0.05 mol % and no greater than 5 mol %. The degree of saponification of the alkyl-modified vinyl alcohol polymer is no less than 20 mol % and no greater than 99.99 mol %. The surfactant is a compound represented by the following formula (I) having hydrophilic groups X1 and X2, and an alkyleneoxy group having 3 to 5 carbon atoms (—R1—O—). X1—OR1—OmR2—X2  (I)

Abstract translation: 提供烷基改性的PVA溶液，其在高温下具有低粘度，导致优异的可操作性，伴随着降低温度时粘度迅速增加，即使在溶液中烷基改性PVA的浓度增加的情况下 。 含烷基改性乙烯醇聚合物，表面活性剂和水的烷基改性乙烯醇聚合物溶液。 烷基改性的乙烯醇聚合物具有包含碳原子数为5〜29的烷基的单体单元。 单体单元的含量百分比不小于0.05mol％且不大于5mol％。 烷基改性乙烯醇系聚合物的皂化度为20摩尔％以上，99.99摩尔％以下。 表面活性剂是具有亲水基团X1和X2以及具有3至5个碳原子的亚烷基氧基（-R1-O-）的下式（I）表示的化合物。 X1-OR1-OmR2-X2（I）