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

IPC分类号： C08F16/06 ,  C08F8/12 ,  C08J3/12 ,  D21H17/36 ,  D21H19/12 ,  D21H21/16

CPC分类号： C08F16/06 ,  C08F8/12 ,  C08J3/12 ,  D21H17/36 ,  D21H19/12 ,  D21H21/16 ,  C08J2329/04

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.

公开(公告)号：US20210009842A1

公开(公告)日：2021-01-14

申请号：US17041807

申请日：2019-03-25

申请人： KURARAY CO., LTD.

发明人： Keisuke MORIKAWA ,  Tatsuya TANIDA ,  Yuta TAOKA

IPC分类号： C09D129/04 ,  C09D133/02 ,  C09J129/04 ,  C09J133/02 ,  C08K3/013 ,  C08K5/00 ,  D21H19/20

摘要： The present invention provides a coating agent having a reduced methanol content, an adhesive including the coating agent and excellent in coating performance and adhesiveness, and a coated product including the coating agent and excellent in water resistance and alcohol resistance. The present invention relates to a coating agent comprising a modified vinyl alcohol polymer (A), the modified vinyl alcohol polymer (A) comprising 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, having a degree of saponification of 80.0 mol % or more and 99.9 mol % or less, having a methanol content of less than 3.0 mass % as measured by headspace gas chromatography, and having an amount of 0.1 ppm or more and less than 2,000 ppm of a component insoluble in a 90° C., 5 mass % aqueous solution.

公开(公告)号：US20240209128A1

公开(公告)日：2024-06-27

申请号：US18288570

申请日：2022-04-25

申请人： Kuraray Co., Ltd.

发明人： Misuzu FUJIMORI ,  Yuta TAOKA ,  Atsushi JIKIHARA

IPC分类号： C08F18/08 ,  C08J3/12 ,  C08L31/04 ,  C09D131/04 ,  C09J131/04 ,  D21H19/12 ,  D21J1/08

CPC分类号： C08F18/08 ,  C08J3/12 ,  C08L31/04 ,  C09D131/04 ,  C09J131/04 ,  D21H19/12 ,  D21J1/08 ,  C08J2331/04 ,  C08L2201/52

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, and an insoluble content of a mixture prepared by adding 4 parts by mass of the vinyl alcohol polymer to 96 parts by mass of water followed by stirring at 60° C. for 1 hour is 0.1 ppm or more and less than 2,000 ppm.

公开(公告)号：US20220259467A1

公开(公告)日：2022-08-18

申请号：US17625255

申请日：2020-07-06

申请人： KURARAY CO., LTD.

发明人： Yuta TAOKA ,  Yoriko IMAOKA ,  Tatsuya TANIDA ,  Masato NAKAMAE

IPC分类号： C09J129/02 ,  C09J11/04 ,  A47G21/18

摘要： A water-based adhesive for a paper straw, comprising: an ethylene-vinyl alcohol copolymer (A); and water, wherein the ethylene-vinyl alcohol copolymer (A) has a content of ethylene units of 1 mol % or more and less than 20 mol % and a block character of the ethylene units from 0.90 to 0.99. The water-based adhesive contains the ethylene-vinyl alcohol copolymer (A) having a specific structure, and is thus excellent in balance between the rapid coatability, the film strength, the initial adhesiveness, the dynamic water resistance, and the acid resistance, and particularly excellent in the rapid coatability, the film strength, and the acid resistance.