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:
Sep. 13, 1988
Filed:
Aug. 18, 1987
Applicant:
Inventors:
Assignee:
Huels Aktiengesellschaft, Marl, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C08K / ; C08K / ; C08L / ; C08L / ;
U.S. Cl.
CPC ...
524 99 ; 523209 ; 524236 ; 524442 ; 524492 ; 524575 ;
Abstract
A process for the production of free-flowing rubber powders with silicic acid as filler comprises combining a rubber latex with silicic acid filler while stirring in the presence of specific auxiliary agents, adjusting the pH range of the mixture to cause coagulation, and separating and drying the resultant solids wherein the specific auxiliary agents comprise organic surfactants together with colloidal silicic acid.