Patent · US Active

PEI particle foams for applications in aircraft interiors

US11814499B2 · kind B2 · utility

0Cited by

7References

15Claims

0Family size

Assignee

Evonik Operations GmbH · DE

Inventors

Christian Traßl · Warmensteinach, DE
Denis Holleyn · Hofheim, DE
Kay Bernhard · Darmstadt, DE

Key dates

Filing date	Dec 7, 2022
Grant date	Nov 14, 2023
Priority date	—
Expiry date	Dec 7, 2042

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC08J2379/08
WIPO fieldOther special machines
WIPO sectorMechanical engineering

Abstract

Polymer foams based on polyetherimides (PEIs) fulfill the legal specifications demanded by the aviation industry for aircraft interiors. Specifically, the demands on fire characteristics, stability to media and mechanical properties constitute a great challenge here. According to related art, suitable polymer foams are produced as semi-finished products. Reprocessing to give shaped articles is uneconomic in terms of time and material exploitation, for example by virtue of large amounts of cutting waste. The material is suitable in principle and can be processed to give particle foam mouldings. These mouldings can be produced without reprocessing in short cycle times and, hence, economically. Furthermore, this gives rise to new means of functional integration, for example by direct incorporation of inserts etc. in the foam, and with regard to freedom in terms of design.

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