Composites of inorganic and/or organic microparticles and nano-calcium carbonate particles
AssigneeOmya Development AG
InventorsMatthlas Buri, Patrick A.C. Gane, René Vinzenz Blum
Life of this patent
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Abstract
The present invention relates to composites, comprising inorganic and/or organic pigments and/or fillers in the form of microparticles, the surface of which is coated at least partially with finely divided nano-calcium carbonate with the help of binders based on copolymers comprising as monomers one or more dicarboxylic acids and one or more monomers from the group of diamines, triamines, dialkanolamines or trialkanolamines, a method for producing such composites, aqueous slurries thereof and their use in papermaking or in the field of paint and plastic production and the use of the inventive binders for coating the microparticles with nano-calcium carbonate.
Claims14
1-34. (canceled)
A method for producing a composite comprising inorganic and/or organic pigment and/or filler particles coated at least partially with a composition comprising calcium carbonate particles, and a binder, the method comprising the steps of:
- a) providing inorganic and/or organic pigment and/or filler particles having a spherical equivalent diameter in the micrometer range;
- b) providing calcium carbonate particles having a spherical equivalent diameter in the nanometer range;
- c) providing a binder that is a copolymer comprising as monomers one or more dicarboxylic acids and one or more monomers from the group of diamines, triamines, dialkanolamines or trialkanolamines;
- d) mixing the pigment and/or filler particles from a) and the calcium carbonate particles from b),
- wherein the binder is added to the pigment and/or filler particles from a) or to the calcium carbonate composition from b) before step d) and the resulting reaction mixture is homogenized.
A method for producing a composite comprising inorganic and/or organic pigment and/or filler particles coated at least partially with a composition comprising calcium carbonate particles, and a binder, the method comprising the steps of:
- a) providing inorganic and/or organic pigment and/or filler particles having a spherical equivalent diameter in the micrometer range;
- b) providing calcium carbonate particles having a spherical equivalent diameter in the nanometer range;
- c) providing a binder that is a copolymer comprising as monomers one or more dicarboxylic acids and one or more monomers from the group of diamines, triamines, dialkanolamines or trialkanolamines;
- d) mixing the pigment and/or filler particles from a) and the calcium carbonate particles from b),
- wherein the binder is added to the mixture of pigment and/or filler particles from a) and to the calcium carbonate composition from b) after step d) and the resulting reaction mixture is homogenized.
47-62. (canceled)
Dependencies are inferred from the claim text.