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publicationDate 1985-04-09-04:00^^<http://www.w3.org/2001/XMLSchema#date>
publicationNumber US-4509987-A
titleOfInvention Calcium carbonate dispersions
abstract Concentrated (e.g. above 72% by weight) dispersions of calcium carbonate ground to a particle size such that at least 87% by weight of the particles are less than 2 mu m in size have a tendency to gel on standing. In the invention this tendency is minimized or eliminated by using, as dispersing agent, a copolymer of from 5 to 75% by weight AMPS and 95 to 25% by weight acrylic acid, or a water soluble salt thereof, having a molecular weight in the range 1000 to 20,000.
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