Coating processes – Particles – flakes – or granules coated or encapsulated – Inorganic base
Patent
1994-06-17
1995-07-11
Beck, Shrive
Coating processes
Particles, flakes, or granules coated or encapsulated
Inorganic base
427212, 427215, 427217, 427221, B05D 700
Patent
active
054319560
ABSTRACT:
A novel inorganic particulate powder coated with an organic polymer is claimed. The product is obtainable by dispersing in water inorganic particles at a pH higher than their isoelectric point in the presence of a polymeric polybasic acid as a dispersing agent to produce particles having a modified isoelectric point. The pH of the dispersion is then adjusted to a value below 9 but above the modified isoelectric point and an ethylenically unsaturated monomer is polymerized in the presence of the dispersion so as to coat the inorganic particles with polymerized monomer. A method for forming the particles is also claimed.
The particles prepared by the method have been shown to be uniformly and discretely coated with an organic polymeric coating and can be used in many applications where it is desired to disperse inorganic particles in organic media such as paints, inks and plastics compositions.
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Decelles Guy
Robb John
Beck Shrive
Maiorana David M.
Tioxide Group Services Limited
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