Foam comprising maleic anhydride grafted polyolefin elastomer, secondary alcohol, and high melting point component
A foam composition with a high melting point component, MAH-g-POE, and secondary alcohol addresses thermal stability and shrinkage issues, achieving minimal shrinkage and improved thermal stability for footwear midsoles.
WO2026112842A1PCT designated stage Publication Date: 2026-06-04DOW GLOBAL TECHNOLOGIES LLC +1
Patent Information
- Authority / Receiving Office
- WO · WO
- Patent Type
- Applications
- Current Assignee / Owner
- DOW GLOBAL TECHNOLOGIES LLC
- Filing Date
- 2024-11-27
- Publication Date
- 2026-06-04
AI Technical Summary
Technical Problem
Existing polymer foams used in footwear midsoles face issues with thermal stability and shrinkage during the foaming process due to lack of high melt strength, leading to cell rupture.
Method used
A foam composition comprising a high melting point component, maleic anhydride grafted polyolefin elastomer (MAH-g-POE), and a secondary alcohol, with a minimum content of 49 wt.% MAH-g-POE and secondary alcohol, to achieve low shrinkage and improved thermal stability.
Benefits of technology
The foam exhibits minimal shrinkage of less than or equal to 6% and maintains thermal stability, enhancing its performance in midsole applications.
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Smart Images
Figure PCTCN2024134970-FTAPPB-I100001 
Figure PCTCN2024134970-FTAPPB-I100002 
Figure PCTCN2024134970-FTAPPB-I100003
Abstract
Embodiments are directed to a foam comprising the crosslinked reaction product of a maleic anhydride grafted polyolefin elastomer (MAH-g-POE), secondary alcohol, and a high melting point component. The foam comprises greater than or equal to 49 wt. %of the MAH-g-POE and the secondary alcohol. Further embodiments are directed to a process of physically foaming the foam.
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