Composition and process for forming a flexible polyurethane foam sealing device
US7326738B2 · kind B2 · utility
3Cited by
20References
17Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 29, 2004 |
| Grant date | Feb 5, 2008 |
| Priority date | — |
| Expiry date | Apr 21, 2025 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08J2375/04
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
The subject invention provides a composition and a process for forming a flexible polyurethane foam sealing device having improved compression set properties at increased temperatures. The sealing device is formed without the use of chemical blowing agents. The composition includes an isocyanate component for reaction with a resin component comprising an isocyanate-reactive component having a functionality of least four and a hydroxyl number of less than 40, a graft dispersion, and a physical blowing agent. The most preferred physical blowing agent is HFC-245 fa or 1,1,1,3,3-pentafluoropropane.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.