Manufacture of creep-free prepregs based on phenolic resins
US4962166A · kind A · utility
5Cited by
13References
8Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 18, 1988 |
| Grant date | Oct 9, 1990 |
| Priority date | — |
| Expiry date | Aug 18, 2008 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T442/2344
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
In the manufacture of creep-free prepregs based on phenolic resins of the resole type, the reinformcing agents are impregnated with an essentially solvent-free mixture of a phenolic resin and a viscosity controlling amount up to 60% by weight of the resin of an alkali metal metaborate or an alkaline-earth metaborate or a mixture thereof. The resultant compression molded articles exhibit improved strengths.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.