Patent · US Active

Kit for producing composite semi-finished products comprising reversibly crosslinked polymer emulsions

US10494495B2 · kind B2 · utility

0Cited by

4References

12Claims

0Family size

Assignee

EVONIK DEGUSSA GMBH · DE

Inventors

Friedrich Georg Schmidt · Haltern am See, DE
Stefan Hilf · Rodenbach, DE
Florian Hermes · Haltern am See, DE
Dorothea Staschik · Nidderau, DE
Thomas Eurich · Frankfurt, DE
Rebecca Pieroth · Ronneburg, DE

Key dates

Filing date	Jul 30, 2015
Grant date	Dec 3, 2019
Priority date	—
Expiry date	Aug 5, 2035

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC08J2333/12
WIPO fieldOther special machines
WIPO sectorMechanical engineering

Abstract

The invention concerns specifically emulsion polymers which are intraparticulately crosslinked via a hetero-Diels-Alder (HDA) mechanism. The crosslinked polymers can then be wholly or partly decrosslinked by thermal processing, for example in the form of a composite matrix, via a retro-Diels-Alder or retro-hetero-Diels-Alder reaction and interparticulately recrosslinked on cooling. This makes it possible to prepare long shelf life prepregs for composites. But it is also possible to thus realize other materials that have thermoset properties at use temperature but thermoplastic processing properties at a higher temperature.

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