公开(公告)号：US20240101760A1

公开(公告)日：2024-03-28

申请号：US18286374

申请日：2022-03-28

Applicant: KURARAY CO., LTD.

Inventor： Akio TAKASUGI ,  Takuro NIIMURA ,  Atsuhiro NAKAHARA ,  Yoshiaki ASANUMA

IPC: C08G65/34 ,  B32B17/10

CPC classification number: C08G65/34 ,  B32B17/10036 ,  B32B17/10788 ,  B32B17/10899 ,  B32B2250/03 ,  B32B2250/40 ,  B32B2266/0214 ,  B32B2305/026 ,  B32B2371/00 ,  C08G2110/0083

Abstract: The present invention relates to a method for producing an acetalization product of an ethylene/vinyl alcohol copolymer by acetalization of an ethylene/vinyl alcohol copolymer, wherein the ethylene/vinyl alcohol copolymer is a porous object.

公开(公告)号：US20230069427A1

公开(公告)日：2023-03-02

申请号：US17792154

申请日：2020-12-18

Applicant: KURARAY CO., LTD.

Inventor： Takuro NIIMURA ,  Akio TAKASUGI ,  Atsuhiro NAKAHARA ,  Yoshiaki ASANUMA

IPC: B32B17/10 ,  B32B37/20 ,  C08L29/14

Abstract: The present invention relates to a resin composition, comprising: a modified vinyl acetal resin which comprises 20 to 80 mol % of ethylene units and 4 to 76 mol % of vinyl alcohol units based on all monomer units constituting the resin, and has an acetalization degree of 5 to 80 mol %; and an alkali metal salt and/or an alkaline earth metal salt of a strong acid, wherein a total content of the alkali metal salt and/or the alkaline earth metal salt of the strong acid is 0.0005 to 0.06 part by mass with respect to 100 parts by mass of the modified vinyl acetal resin.

公开(公告)号：US20240199779A1

公开(公告)日：2024-06-20

申请号：US18286245

申请日：2022-03-28

Applicant: KURARAY CO., LTD.

Inventor： Nobutaka HIRAOKA ,  Akio TAKASUGI ,  Takuro NIIMURA ,  Atsuhiro NAKAHARA ,  HiroakI SUGII ,  Yoshiaki ASANUMA

IPC: C08F216/06 ,  B32B17/10 ,  C08F2/06 ,  C08F216/38 ,  C08L29/04

CPC classification number: C08F216/06 ,  B32B17/10036 ,  B32B17/10788 ,  C08F2/06 ,  C08F216/38 ,  C08L29/04 ,  C08L2205/025

Abstract: The present invention relates to an acetalization product of an ethylene/vinyl alcohol copolymer, comprising: 20 to 80 mol % of an ethylene unit; and 4 to 76 mol % of a vinyl alcohol unit based on a total monomer unit constituting the acetalization product, wherein a degree of acetalization is 5 to 80 mol %, and expression (1): 0.75≤W0.05h/2f≤1.00 (1) [wherein W0.05h/2f represents a symmetry factor determined by reversed-phase partition gradient high-performance liquid chromatography analysis with a water-ethanol eluent, according to JIS K 0124:2011], and expression (2): 1.27≤Tm/Tg≤1.35 (2) [wherein Tm and Tg respectively represent a melting peak temperature (kelvin) and an intermediate glass transition temperature (kelvin) measured according to JIS K7121:2012] are satisfied.

公开(公告)号：US20220184930A1

公开(公告)日：2022-06-16

申请号：US17440815

申请日：2020-03-18

Applicant: KURARAY CO., LTD.

Inventor： Takuro NIIMURA ,  Akio TAKASUGI ,  Atsuhiro NAKAHARA ,  Yoshiaki ASANUMA

IPC: B32B17/10 ,  C08J5/18 ,  C08F210/02 ,  C08F216/06 ,  C08F216/38 ,  C08F8/28

Abstract: The problem to be solved of the present invention is to provide a modified vinyl acetal resin for an interlayer film of laminated glass having excellent transparency, impact resistance, heat resistance and molding ability. The means for solving the problem is a modified vinyl acetal resin for an interlayer film of laminated glass comprising 25 to 60 mol % of ethylene units and 24 to 71% by mol of vinyl alcohol units, based on all the monomer units constituting the resin, and having the acetalization degree of 5 mol % or more and less than 40 mol %.