Extended shelf life prepreg article and method
US5165989A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 4, 1989 |
| Grant date | Nov 24, 1992 |
| Priority date | — |
| Expiry date | Dec 4, 2009 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T442/2623
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
An essentially tack free prepreg article, characterized by a shelf life at about 25.degree. C. of at least about three months, and method of making the same are provided. The prepreg article comprises at least one network of fibers which has been impregnated with a solution of a resin in styrene and a catalyst. The resin is curable by the catalyst at a temperature above about 90.degree. C. The impregnated network is dried for a length of time and at a temperature sufficient to reduce the styrene content to less than about 1% by weight of the impregnated network without curing the resin. The prepreg article can subsequently be used as a component in a molded composite.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.