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:
May. 28, 2019
Filed:
Jun. 09, 2015
Akzo Nobel Chemicals International B.v., Arnhem, NL;
Wilhelm Klaas Frijlink, Zwolle, NL;
Leonardus Bernardus Gerhardus Maria Nijhof, Enter, NL;
AKZO NOBEL CHEMICALS INTERNATIONAL B.V., Arnhem, NL;
Abstract
Process for enhancing the melt strength of polypropylene by heat treating said polypropylene at a temperature between 150° C. and 300° C. in the presence of 0.3-3 wt %, based on the weight of the polypropylene, of a dialkyl peroxydicarbonate having alkyl groups with 12-20 carbon atoms, wherein a hydrophilic silica with a silanol group concentration of at least 1.0 mmol Si—OH groups/g, as measured by LiAlHtitration, is added to said polypropylene before, during, or after said heat treatment, in a mole ratio Si—OH/dialkyl peroxydicarbonate of more than 0.5.