Polyester elastomer resin composition and foamed molded article

JP7883703B2Active Publication Date: 2026-07-02TOYOBO MC CORP
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Patent Information

Application Number
JP2022515586
Authority / Receiving Office
JP · JP
Patent Type
Patents
Current Assignee / Owner
Priority Date
2021-07-13
Filing Date
2021-10-15
Publication Date
2026-07-02
Estimated Expiration
2041-10-15

AI Technical Summary

Technical Problem

Existing thermoplastic polyester elastomer foamed molded articles suffer from reduced rebound elasticity and surface smoothness due to non-foamed skin layers, and methods like core-back injection foaming result in uneven surfaces and low foaming ratios.

Method used

A thermoplastic polyester elastomer resin composition with a specific hard segment and soft segment ratio, combined with a thickening agent, is used in a counter-pressure foam molding method to achieve high-magnification foaming, resulting in a foamed molded article with excellent surface smoothness and high rebound elasticity.

Benefits of technology

The composition enables the production of lightweight, high-rebound, and uniformly foamed articles with superior surface smoothness and heat resistance, suitable for applications requiring high reliability without post-processing.

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Abstract

The present invention provides a thermoplastic polyester elastomer resin composition that is suitable for foam molded bodies that have excellent light-weightedness, rebound resilience, and surface smoothness. A thermoplastic polyester elastomer resin composition for foam molding using counterpressure, the thermoplastic polyester elastomer resin composition being characterized by containing 0.05–4.5 parts by mass of a thickener per 100 parts by mass of a thermoplastic polyester elastomer formed by bonding a hard segment that comprises a polyester that includes an aromatic dicarboxylic acid and an aliphatic and / or alicylcic diol as constituent components and at least one type of soft segment selected from among aliphatic polyethers, aliphatic polyesters, and aliphatic polycarbonates, the soft segment content being 25–90 mass%. A foam molded body in which the thermoplastic polyester elastomer resin composition forms a continuous phase.
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Citation Information

Patent Citations

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    JP1994506724A

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