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:
Dec. 03, 2013
Filed:
Jun. 30, 2011
Paul Birnbrich, Sollngen, DE;
Hans-josef Thomas, Korschenbroich, DE;
Dagmar Stahlhut-behn, Düsseldorf, DE;
Gilbert Schenker, Erkrath, DE;
Paul Birnbrich, Sollngen, DE;
Hans-Josef Thomas, Korschenbroich, DE;
Dagmar Stahlhut-Behn, Düsseldorf, DE;
Gilbert Schenker, Erkrath, DE;
Cognis IP Management GmbH, Duesseldord, DE;
Abstract
Polymer foams comprising macropores, the macropores having average cross sections of above 500 nm, are obtainable by reacting one or more epoxy resins with one or more amphiphilic epoxy resin hardeners in water in a phase inversion polymerization, where, during the phase inversion polymerization, but after phase inversion has taken place, a volume increase of the internal voids which form initially, and which are present predominantly as micropores having average cross sections of below 500 nm, is induced such that the fraction of the macropores—relative to the entirety of micropores and macropores present in the polymer foam—at the end of the phase inversion polymerization is above 50% by volume. Polymer foams of the present invention are suitable for use as acoustic insulation materials in means of transport and in industrial and plant construction.