Compositions – Water-softening or purifying or scale-inhibiting agents
Patent
1990-02-22
1992-06-09
Lieberman, Paul
Compositions
Water-softening or purifying or scale-inhibiting agents
252135, 25217414, 252 95, 252 99, C11D 312, C11D 1708
Patent
active
051204657
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.
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Botta Frank J.
Larson George P.
Sare Edward J.
Dry Branch Kaolin Company
Higgins Erin M.
Lerner Paul J.
Lieberman Paul
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