Mixable room temperature castable polyurethane system
US6420509B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 22, 2000 |
| Grant date | Jul 16, 2002 |
| Priority date | — |
| Expiry date | Sep 22, 2020 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G18/10
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
The present invention relates to a polyurethane compound which has particular utility as a potting compound for fan exit guide vane assemblies of commercial gas turbine engines. The polyurethane compound comprises a formulation of polyurethane prepolymers mixed with an aromatic amine curing agent (hardener) in a volumetric mix ratio in the range of from about 0.9:1 to about 1:1. The polyurethane prepolymer consists of a blend of different polyethers based on diphenylmethane diisocyanate (MDI). The amine curing agent is a blend of oligomeric diamines with an aromatic diamine with a catalytic component. Both of the blends, in an uncured state, are liquid at room temperature.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.