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:
Oct. 24, 2000
Filed:
Dec. 18, 1998
Applicant:
Inventors:
Julie Joseph, Neath, GB;
Bryan Thomas, Barry, GB;
Assignee:
Dow Corning Limited, Wales, GB;
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
C07B / ;
U.S. Cl.
CPC ...
556400 ; 556413 ; 556419 ; 556427 ; 556438 ; 556439 ; 556440 ; 556442 ;
Abstract
A method for the preparation of a hydrophobic clay by contacting an aqueous suspension of the clay with an organosilane of formula R.sup.1.sub.a SiX.sub.4-a or an organosiloxane comprising units of formula R.sup.2.sub.n SiO.sub.(4-n)/2 in the presence of an acid and a water-miscible solvent. The resulting clay suspension is then contacted with a water-immiscible solvent to effect separation of the hydrophobed clay from the suspension.