UV varnish gloss performance using novel pigment and process for making same
View Patent ↗A high solids precipitated calcium carbonate (PCC) suspension and method for producing the suspension are provided, with the PCC having a PCC particle size distribution d 90 value of about 0.7 microns or less, a PCC particle size distribution d 50 value of about 0.4 microns or less, a PCC particle size distribution d 90 /d 50 ratio of from about 1.2 to about 2.2 and a PCC specific surface area of about 10.0 meters squared per gram or greater.
1. A precipitated calcium carbonate (PCC) suspension comprising PCC particles and having:
a PCC particle size distribution d 90 value of about 0.7 microns or less;
a PCC particle size distribution d 50 value of about 0.4 microns or less;
a PCC particle size distribution d 90 /d 50 ratio of from about 1.2 to about 2.2; and
a PCC specific surface area of about 10.0 meters squared per gram or greater.
2. The precipitated calcium carbonate (PCC) suspension of claim 1 , wherein the PCC particles have a particle size distribution d 90 value of about 0.5 microns or less.
3. The precipitated calcium carbonate (PCC) suspension of claim 1 , wherein the PCC particles have a particle size distribution d 50 value of about 0.35 microns or less.
4. The precipitated calcium carbonate (PCC) suspension of claim 1 , wherein the PCC particles have an aragonite content of from about 75 percent to about 100 percent.
5. The precipitated calcium carbonate (PCC) suspension of claim 1 , wherein the PCC particles have an aragonite content of from about 85 percent to about 98 percent.
6. The precipitated calcium carbonate (PCC) suspension of claim 1 , wherein the suspension has a PCC solids content of about 72 percent by weight or greater.
7. The precipitated calcium carbonate (PCC) suspension of claim 1 , wherein the suspension has a PCC solids content of less than about 72 percent by weight.
8. A paper or paperboard coated with the precipitated calcium carbonate of claim 1 .
9. A paper or paperboard filled with the precipitated calcium carbonate of claim 1 .
10. A toothpaste containing the precipitated calcium carbonate of claim 1 .
11. A polymer containing the precipitated calcium carbonate of claim 1 .