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:
Jul. 09, 1991
Filed:
Jun. 02, 1989
Applicant:
Inventors:
Konrad Neumann, Rheinfelden, DE;
Angelika Hayer, Riehen, CH;
Wolfgang Rehmann, Basel, CH;
Horst O Brucker, Rheinfelden, DE;
Assignee:
Ciba-Geigy Corporation, Ardsley, NY (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
B01D / ; C09B / ; C11D / ; D06L / ;
U.S. Cl.
CPC ...
8526 ; 8543 ; 8654 ; 8661 ; 8673 ; 8675 ; 8680 ; 8685 ; 8687 ; 2331 / ; 106316 ; 106401 ; 106902 ; 25230121 ; 540139 ; 540140 ;
Abstract
Process for the preparation of granules by spray-drying of an aqueous suspension having a solids content of greater than/equal to 30% and containing at least one dye, fluorescent brightener or photoactivator and one condensation product from naphthalenesulfonic acid and formaldehyde and, if necessary, further auxiliaries and/or diluents. The spray-drying is carried out at a feed pressure of 50-150 bar, the residual moisture content of the product is less than 4%, and the granules obtained are in particular very pressure resistant and abrasion resistant.