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:
Jun. 09, 1992
Filed:
Feb. 22, 1990
Edward J Sare, Berkeley Heights, NJ (US);
George P Larson, Roselle Park, NJ (US);
Frank J Botta, Linden, NJ (US);
Dry Branch Kaolin Company, Dry Branch, GA (US);
Abstract
A thickening or suspending agent for imparting thixotropic properties to aqueous compositions, particularly LADD formulations, comprises a kaolinite clay admixed to the formulation at a level ranging from about 2% to about 5% by weight. While the thickening or suspending properties of the kaolinite clay are exhibited over a very broad range of particle size products, the kaolinite clay used advantageously has a particle size distribution of at least about 50% of the kaolin particles thereof have a particle size less than 2 microns equivalent spherical diameter, more preferably at least about 80% and, most perferably, at least about 95%. When utilized in a slurry form, the kaolinite clay based thickening or suspending agent most advantageously comprises an aqueous slurry of kaolinite particles at a solids level of at least 65% solids by weight. The thickening or suspending agent may also comprise a mixture of a kaolinite clay and a non-kaolinite selected from the group consisting of a smectite clay, attapulgite clay and mixtures thereof, preferably as a mixture of equal parts of kaolinite clay and attapulgite clay, and most preferably as a mixture of equal parts of a kaolinite clay and a bentonite clay.