Patent · US Expired

Fiber-reinforced composite materials and process for their preparation

US5225243A · kind A · utility

6Cited by

4References

9Claims

0Family size

Assignee

Hoechst GmbH · DE

Inventors

Martin Bruck · Hofheim, DE
Tilo Vaahs · Kelkheim, DE
Hans-Jerg Kleiner · Kronberg, DE
Marcellus Peuckert · Hofheim, DE

Key dates

Filing date	Feb 27, 1991
Grant date	Jul 6, 1993
Priority date	—
Expiry date	Feb 27, 2011

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC08J2383/16
WIPO fieldOther special machines
WIPO sectorMechanical engineering

Abstract

The invention relates to fiber composite materials and a process for their preparation. The process comprises impregnating fibers with a molten polysilazane in a first step, converting the polysilazane in the fibers into the non-fusible state in a second step, and heating the impregnated fibers to 800.degree. to 2000.degree. C. in a nitrogen, noble gas or ammonia atmosphere in a third step.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.