公开(公告)号：US20220177733A1

公开(公告)日：2022-06-09

申请号：US17601232

申请日：2020-04-02

Applicant: KURARAY CO., LTD.

Inventor： Yoriko IMAOKA ,  Keisuke MORIKAWA ,  Tatsuya TANIDA

IPC: C09J4/06 ,  C09J11/08 ,  C09J11/06 ,  C09J129/04

Abstract: An aqueous emulsion may include an ethylene-vinyl alcohol copolymer (A) as a dispersant and a polymer (B) which contains an ethylenically unsaturated monomer unit as a dispersoid, wherein the ethylene-vinyl alcohol copolymer (A) has an ethylene unit content of 1 mol % or more and less than 20 mol %; and a crystallinity in water at 30° C. (Cw (30° C.)) and a crystallinity in water at 70° C. (Cw (70° C.)) as determined by pulse NMR satisfying formula (I). Such aqueous emulsions can form fewer aggregates and exhibit excellent water-resistant adhesiveness and excellent film formability.

公开(公告)号：US20220259468A1

公开(公告)日：2022-08-18

申请号：US17625202

申请日：2020-07-06

Applicant: KURARAY CO., LTD.

Inventor： Yoriko IMAOKA ,  Tatsuya TANIDA

IPC: C09J131/04 ,  C09J11/08 ,  C09J4/06

Abstract: An aqueous emulsion may include: an ethylene-vinyl alcohol copolymer (A) as a dispersant; and a polymer (B) containing an unsaturated ethylenic monomer unit as a dispersoid, 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 aqueous emulsion may contain the ethylene-vinyl alcohol copolymer (A), as a dispersant, having a specific structure and is thus excellent in storage stability at low temperatures and water-resistant adhesiveness.

公开(公告)号：US20220259467A1

公开(公告)日：2022-08-18

申请号：US17625255

申请日：2020-07-06

Applicant: KURARAY CO., LTD.

Inventor： Yuta TAOKA ,  Yoriko IMAOKA ,  Tatsuya TANIDA ,  Masato NAKAMAE

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

Abstract: 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.

公开(公告)号：US20200157390A1

公开(公告)日：2020-05-21

申请号：US16625355

申请日：2018-06-21

Applicant: KURARAY CO., LTD.

Inventor： Yoriko IMAOKA ,  Keisuke MORIKAWA ,  Tatsuya TANIDA

IPC: C09J131/04 ,  C08F118/08 ,  C08F220/34 ,  C08F220/06 ,  C09J133/14 ,  C09J133/02 ,  C08L31/04 ,  C08L33/14 ,  C08L33/02

Abstract: The present invention provides an aqueous emulsion that excels in heat resistance, water resistance (particularly, hot water resistance and boiling resistance), and viscosity stability. The present invention relates to an aqueous emulsion comprising an ethylenically unsaturated monomer unit-containing polymer (A) as a dispersoid and a vinyl alcohol polymer (B) as a dispersant, wherein the ethylenically unsaturated monomer unit-containing polymer (A) comprises: a structural unit derived from a radical-polymerizable ethylenically unsaturated monomer (p) having a functional group represented by the following general formula (P); and a structural unit derived from a radical-polymerizable ethylenically unsaturated monomer (q) having a functional group represented by the following general formula (Q), wherein X and Y are the same or different, and each represent an oxygen atom or a sulfur atom, Z is an oxygen atom or a nitrogen atom, * represents a bond, and m is 1 or 2.