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:
Jan. 21, 1997
Filed:
May. 19, 1994
Applicant:
Inventors:
Norbert Hafner, Linz, AT;
Friedrich Mitter, Pasching, AT;
Hans Ledwinka, St. Ulrich, AT;
Elisabeth Bruckm uller, Weibern, AT;
Josef Kurz, Traun, AT;
Assignee:
PCD Polymere Gesellschaft m.b.H., Schwechat-Mannsworth, AT;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C08F / ;
U.S. Cl.
CPC ...
528483 ; 528493 ;
Abstract
Process for the preparation of elastomeric, non-agglomerated, powdery/crumbly polypropylene by polymerization of propylene, if appropriate together with other olefins as comonomers, in liquid propylene and subsequent precipitation of the polypropylenes formed with CO.sub.2 or a polar solvent of which the polar term 'delta p' of the solubility parameter according to Hansen is greater than 5 and the total solubility parameter 'delta' is less than 30.