Tackifier application for resin transfer molding
US6447705B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 26, 1997 |
| Grant date | Sep 10, 2002 |
| Priority date | — |
| Expiry date | Sep 28, 2018 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29C70/345
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A method of creating or fabricating a composite preform wherein a mixture of a catalyst and a first epoxy resin is applied to at least one layer of fibers, preferably in the form of a fabric, mat or unidirectional tape. A plurality of stacked layers is formed from layers of fibers with applied mixture thereon, preferably in a mold. The layers are pressurized and/or heated to reduce the viscosity, such as but not limited to melting, of the first epoxy resin and catalyst and then allowed to fuse together to form a preform. The preform in the closed mold is impregnated with a mixture of a second epoxy resin and a polycyanate to cause cross-linking, the cross-linking including the first epoxy resin. The first and second epoxy resins may be the same.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.