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. 22, 2002
Filed:
Apr. 19, 1999
Applicant:
Inventors:
Udo Görl, Bornheim-Roisdorf, DE;
Reinhard Stober, Hasselroth, DE;
Hartmut Lauer, Bad Soden-Salmünster, DE;
Uwe Ernst, Marl, DE;
Assignee:
PKU Pulverkautschuk Union GmbH, Marl, GB;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C08J 3/00 ; C08K 3/34 ; C08K 1/100 ; C08K 9/00 ; C08L 9/00 ;
U.S. Cl.
CPC ...
C08J 3/00 ; C08K 3/34 ; C08K 1/100 ; C08K 9/00 ; C08L 9/00 ;
Abstract
Finely divided powdered rubbers containing filler which remain free-flowing even after exposure to mechanical stresses and to a process for the production thereof, in which the rubber powder is obtained in two precipitation steps, and to the use of these powders for the production of vulcanizable rubber compounds. The fillers used, which are both precipitated silicas and carbon blacks known in the rubber art, are surface-modifed by organosilicon compounds.