Carbon dioxide blown low density, flexible microcellular elastomers suitable for preparing shoe components
US6458861B1 · kind B1 · utility
4Cited by
5References
20Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jan 18, 2001 |
| Grant date | Oct 1, 2002 |
| Priority date | — |
| Expiry date | Jan 26, 2021 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08J2375/04
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Microcellular polyurethane flexible foams suitable for use as lightweight shoe sole components are produced by dissolving carbon dioxide into one or both of the iso-side or resin-side of an isocyanate-prepolymer-based microcellular polyurethane foam formulation. The resultant foams possess more uniform cell structure and enhanced physical properties as compared to all water-blown foams of the same basic formulation and density. The hardness of the foams is more suitable for shoe sole, particularly midsole applications, than that of the water-blown foams, despite the lower urea hard segment content of the CO2 blown foams.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.