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:
Feb. 19, 2019
Filed:
Jun. 25, 2015
Kay Bernhard, Darmstadt, DE;
Ina Liebl, Griesheim, DE;
Tim Denk, Grosswallstadt, DE;
Florian Becker, Darmstadt, DE;
Thomas Richter, Darmstadt, DE;
Kay Bernhard, Darmstadt, DE;
Ina Liebl, Griesheim, DE;
Tim Denk, Grosswallstadt, DE;
Florian Becker, Darmstadt, DE;
Thomas Richter, Darmstadt, DE;
Evonik Roehm GmbH, Darmstadt, DE;
Abstract
The invention relates to a process for the production of mold-foamed poly(meth)acrylimide (P(M)I) cores, in particular of polymethacrylimide (PMI) cores, which can be used by way of example in automobile construction or aircraft construction. A feature of this process is that polymer granules or polymer powder preheated under pressure are moreover charged under pressure to a compression mold where they are foamed with depressurization. In particular, a feature of the process is that it optionally uses a preferably two-shell compression mold for the heating and also for the cooling of the granules and, respectively, the rigid foam core formed therefrom.