The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 27, 2015
Filed:
Nov. 06, 2012
Applicants:
Friedrich Georg Schmidt, Haltern am See, DE;
Stefan Hilf, Rodenbach, DE;
Inventors:
Friedrich Georg Schmidt, Haltern am See, DE;
Stefan Hilf, Rodenbach, DE;
Assignee:
EVONIK DEGUSSA GmbH, Essen, DE;
Primary Examiner:
Int. Cl.
CPC ...
C08J 3/24 (2006.01); C08J 5/04 (2006.01); C08J 5/24 (2006.01); B29B 13/00 (2006.01); C08L 33/08 (2006.01); C08F 2/60 (2006.01);
U.S. Cl.
CPC ...
C08J 3/24 (2013.01); B29B 13/00 (2013.01); C08J 5/04 (2013.01); C08J 5/24 (2013.01); Y10T 442/20 (2013.01);
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.