Molded foam of ester-based elastomer, uses thereof, and expanded beads of ester-based elastomer

Patent metadata

Field	Value
Publication number	US-11834564-B2
Application number	US-202017061915-A
Country	US
Kind code	B2
Filing date	Oct 2, 2020
Priority date	Jul 13, 2016
Publication date	Dec 5, 2023
Grant date	Dec 5, 2023

Abstract

An ester-based elastomer expanded molded article comprising a fusion of expanded particles that contain an ester-based elastomer as a base resin.

First claim

The invention claimed is:

1. An ester-based elastomer expanded molded article comprising a fusion of expanded particles that contain an ester-based elastomer as a base resin,
wherein the ester-based elastomer contains a hard segment and a soft segment,
wherein the hard segment is formed with
a dicarboxylic acid component, and
a dicarboxylic acid component and a diol component, and

wherein the soft segment is an aliphatic polyether and/or polyester,

wherein the ester-based elastomer contains the hard segment at 30 to 55% by mass, and wherein the dicarboxylic acid component is constituted of only terephthalic acid, or contains a terephthalic acid component and a dicarboxylic acid component other than the terephthalic acid component, the content of the dicarboxylic acid component other than the terephthalic acid component being less than 5% by mass.

2. The ester-based elastomer expanded molded article according to claim 1 , wherein the ester-based elastomer has a heat of crystallization of 0 to 25 mJ/mg.

3. The ester-based elastomer expanded molded article according to claim 1 , wherein the dicarboxylic acid component other than the terephthalic acid component is an isophthalic acid component.

4. The ester-based elastomer expanded molded article according to claim 1 , wherein the expanded particles in the fusion have an average cell diameter at a central part of 10 to 200 μm and an average cell diameter at a surface layer part of 50 to 300 μm.

5. The ester-based elastomer expanded molded article according to claim 1 , wherein the expanded molded article shows a density of 0.02 to 0.4 g/cm 3 and a rebound resilience of 50 to 100%.

6. The ester-based elastomer expanded molded article according to claim 1 , wherein the expanded molded article is used for any of an insole, a midsole and an outsole.

7. A midsole comprising the expanded molded article according to claim 6 .

8. A sole comprising the midsole according to claim 7 .

9. Ester-based elastomer expanded particles comprising an ester-based elastomer as a base resin and capable of providing an expanded molded article that comprises a fusion of expanded particles,
wherein the ester-based elastomer contains a hard segment and a soft segment,
wherein the hard segment is formed with
a dicarboxylic acid component, and
a dicarboxylic acid component and a diol component, and

wherein the soft segment is an aliphatic polyether and/or polyester,

wherein the ester-based elastomer contains the hard segment at 30 to 55% by mass, and
wherein the dicarboxylic acid component is constituted of only terephthalic acid, or contains a terephthalic acid component and a dicarboxylic acid component other than the terephthalic acid component, the content of the dicarboxylic acid component other than the terephthalic acid component being less than 5% by mass.

10. The ester-based elastomer expanded particles according to claim 9 , wherein the ester-based elastomer has a heat of crystallization of 0 to 25 mJ/mg.

11. The ester-based elastomer expanded particles according to claim 9 , fulfilling either or both of the following requirements (iv) and (v):
(iv) the ester-based elastomer expanded particles are capable of providing an expanded molded article in which expanded particles in the fusion have an average cell diameter at a central part of 10 to 200 μm and an average cell diameter at a surface layer part of 50 to 300 μm; and
(v) the ester-based elastomer expanded particles are capable of providing an expanded molded article showing a density of 0.02 to 0.4 g/cm 3 and a rebound resilience of 50 to 100%.

12. The ester-based elastomer expanded particles according to claim 9 , wherein the dicarboxylic acid component other than the terephthalic acid component is an isophthalic acid component.

Assignees

• Sekisui Kasei Co Ltd
• Toyobo Mc Corp

Inventors

• Kondo Hirotaka
• Gondoh Yuichi

Classifications

• C08J9/228 Primary

  Forming foamed products · CPC title

• A43B13/04

  Plastics, rubber or vulcanised fibre · CPC title

• C08J9/18 Primary

  by impregnating polymer particles with the blowing agent · CPC title

• C08J9/141

  Hydrocarbons · CPC title

• C08J9/146

  only fluorine as halogen atoms · CPC title