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:
Mar. 04, 1980
Filed:
Nov. 30, 1978
Applicant:
Inventors:
Assignee:
Wacker-Chemie GmbH, Munich, DE;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C09C / ; C04B / ;
U.S. Cl.
CPC ...
1063 / ; 427220 ; 428405 ; 260 4215 ; 423275 ;
Abstract
This invention relates to a process for preparing hydrophobic silicon dioxide which comprises treating silicon dioxide having a surface area of at least 50 m.sup.2 /g with an organosilicon compound containing from 2 to 4 silicon atoms per molecule, in which at least 2 hydrocarbon radicals are bonded to each silicon atom, and any silicon valences which are not satisfied by hydrocarbon radicals are satisfied by siloxane oxygen atoms and at least one tin compound containing Sn-bonded halogen and/or organic radicals.