Low energy cured composite repair system based on epoxy resin with imidazole blocked naphthyl diisocyanate catalyst having extended shelf life
US5086149A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 7, 1989 |
| Grant date | Feb 4, 1992 |
| Priority date | — |
| Expiry date | Jul 7, 2009 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29K2105/06
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A fiber reinforced resin matrix composite material repair system is provided, which critically employs a resin comprising a catalyst of the formula I: ##STR1## with a multifunctional epoxy resin, the resin system being sealed in a water-proofed environment prior to being coated onto a fiber reinforcement. The coated fiber reinforcement is applied over the damaged area, the damaged portion having been removed, and the surrounding surface smoothed. An adhesive is applied to the remaining surface, prior to application of the patch. The resulting patch, which may further include thermoplastic toughening agents and an enhancer, can be directly cured at temperatures below 212.degree. F. to give physical properties similar to the original material.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.