Method for producing dry ground calcium carbonate for use in thermoset polyester resin systems
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United States of America Patent
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Apr 7, 2015
Grant Date -
May 9, 2013
app pub date -
Nov 4, 2011
filing date -
Nov 4, 2011
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Abstract
A dry ground calcium carbonate filler or additive made by dry grinding calcium carbonate in the presence of an organo-amine and then surface treating the ground calcium carbonate with a dispersant and the method of making the same is disclosed. Dry ground calcium carbonate filler or additive made by dry grinding calcium carbonate in the presence of an organo-amine such as triethanolamine and then surface treating the ground calcium carbonate with a dispersant such as sodium polyacrylate when added to a polyester polymer composition yields a lower viscosity of the polymer system than without the addition of triethanolamine followed by surface treating the ground calcium carbonate with a dispersant.
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