Patent · US Active

Pseudothermoplastic, self-crosslinking composites

US9169363B2 · kind B2 · utility

2Cited by

1References

20Claims

0Family size

Assignee

EVONIK DEGUSSA GMBH · DE

Inventors

Friedrich Georg Schmidt · Haltern am See, DE
Stefan Hilf · Rodenbach, DE

Key dates

Filing date	Nov 6, 2012
Grant date	Oct 27, 2015
Priority date	—
Expiry date	Nov 6, 2032

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T442/20
WIPO fieldOther special machines
WIPO sectorMechanical engineering

Abstract

In the present process, reversibly crosslinking composites or storage-stable prepregs are produced by means of a hetero Diels-Alder reactions (HDA,) for example of PMMA polymers. At slightly elevated temperature, these prepregs can be reversibly decrosslinked again by a retro hetero Diels-Alder reaction so that they become moldable. The back-reaction to products which are again crosslinked or high molecular weight then takes place at room temperature.

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