	US 12,252,565 B2
	Method for producing ionomer resin
Tomoka Shirouchi, Tsukuba (JP); Kenta Takemoto, Tsukuba (JP); Takuro Niimura, Tsukuba (JP); Atsuhiro Nakahara, Tsukuba (JP); and Yoshiaki Asanuma, Kurashiki (JP)
Assigned to KURARAY EUROPE GmbH, Hattersheim (DE)
Appl. No. 17/785,464
Filed by Kuraray Europe GmbH, Hattersheim (DE)
PCT Filed Dec. 7, 2020, PCT No. PCT/JP2020/045447 § 371(c)(1), (2) Date Jun. 15, 2022, PCT Pub. No. WO2021/124950, PCT Pub. Date Jun. 24, 2021.
Claims priority of application No. 2019-229594 (JP), filed on Dec. 19, 2019.
Prior Publication US 2023/0018856 A1, Jan. 19, 2023
Int. Cl. C08F 220/14 (2006.01); B32B 17/10 (2006.01); C08F 6/16 (2006.01); C08F 8/44 (2006.01); C08F 210/02 (2006.01); C08F 220/06 (2006.01); C08F 220/18 (2006.01); C08J 3/14 (2006.01); C08J 5/18 (2006.01)

CPC C08F 220/14 (2013.01) [B32B 17/10036 (2013.01); C08F 6/16 (2013.01); C08F 8/44 (2013.01); C08F 210/02 (2013.01); C08F 220/06 (2013.01); C08F 220/1802 (2020.02); C08J 3/14 (2013.01); C08J 5/18 (2013.01)]

8 Claims

1. A method of manufacturing an ionomer resin, comprising the steps of:

(i) adding a poor solvent to a crude ionomer resin solution comprising a (meth)acrylic acid unit (A), a neutralized (meth)acrylic acid unit (B) and an ethylene unit (C) to allow a granular resin with a peak top particle size of from 50 to 700 μm to be precipitated; and

(ii) washing the precipitated granular resin with a washing solution;

wherein the total amount of the unit (A) and the unit (B) is from 6 to 10 mol % based on the entire monomeric units constituting the crude ionomer resin.