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:
Jul. 09, 2019
Filed:
Dec. 03, 2014
Kay Bernhard, Darmstadt, DE;
Ina Liebl, Griesheim, DE;
Denis Holleyn, Balduinstein, DE;
Christoph Seipel, Babenhausen, DE;
Kay Bernhard, Darmstadt, DE;
Ina Liebl, Griesheim, DE;
Denis Holleyn, Balduinstein, DE;
Christoph Seipel, Babenhausen, DE;
Evonik Roehm GmbH, Darmstadt, DE;
Abstract
The invention relates to a process for the production of prefoamed poly(meth)acrylimide (P(M)I) particles which can be further processed to give foam mouldings or composites. A feature of this process is that a polymer granulate is first heated and thus prefoamed in an apparatus by means of IR radiation of a wavelength suitable for this purpose. Said granulate can be further processed in subsequent steps, e.g. in a press mould with foaming to give a moulding or a composite workpiece with foam core.