Granted Patent B2

US 8,888,956 · App. 14/112,970 · Granted Nov 18, 2014

Abstract

Claims (18)

1. A paper slurry comprising paper pulp and a treated inorganic pigment, wherein the treated inorganic pigment is an inorganic pigment comprising a pigment with a surface area of about 30 to about 75 m 2 /g; wherein the pigment surface is treated with an organic treating agent comprising a polyalkanol alkane or a polyalkanol amine, present in the amount of at least about 1.5%, based on the total weight of the treated inorganic pigment and wherein the treated inorganic pigment has a RHI (rat hole index) of about 7 to about 11.

2. The paper slurry of claim 1 wherein the inorganic pigment is ZnS, TiO 2 , CaCO 3 , BaSO 4 , ZnO, MoS 2 , silica, talc or clay.

3. The paper slurry of claim 1 wherein the pigment surface area is about 40 to about 70 m 2 /g.

4. The paper slurry of claim 1 wherein the organic treating agent is a polyalkanol alkane.

5. The paper slurry of claim 4 wherein the polyalkanol alkane is trimethylolpropane, trimethylolethane, glycerol, ethylene glycol, propylene glycol, 1,3 propanediol, or pentaerythritol.

6. The paper slurry of claim 5 wherein the polyalkanol alkane is trimethylolpropane or trimethylolethane.

7. The paper slurry of claim 1 wherein the organic treating agent is a polyalkanol amine.

8. The paper slurry of claim 7 wherein the polyalkanol amine is 2-amino-2methyl-1-propanol, triethanol amine, monoethanol amine, diethanol amine, 1-amino 2-propanol, or 2-amino ethanol.

9. The paper slurry of claim 8 wherein the polyalkanol amine is 2-amino-2methyl-1-propanol or triethanol amine.

10. The paper slurry of claim 1 wherein the organic treating agent is present in the amount of at least about 1.8%, based on the total weight of the treated inorganic pigment.

11. The paper slurry of claim 1 further treated inorganic pigment is further treated with metal oxides.

12. The paper slurry of claim 11 wherein the metal oxide treatment comprises phosphorus, alumina, or mixtures thereof.

13. The paper slurry of claim 12 wherein the metal oxides are present in the amount of 0.1 to about 20 wt %, based on the total weight of the treated inorganic pigment.

14. A décor paper prepared from a a paper slurry, wherein the paper slurry comprises a treated inorganic pigment, wherein the treated inorganic pigment comprises an inorganic pigment comprising a pigment surface area of about 30 to about 75 m 2 /g; wherein the pigment surface is treated with an organic treating agent comprising a polyalkanol alkane or a polyalkanol amine, present in the amount of at least about 1.5% based on the total weight of the treated inorganic pigment, and wherein the treated inorganic pigment has a RHI (rat hole index) of about 7 to about 11.

15. The décor paper of claim 14 further comprising a melamine formaldehyde resin.

16. A laminate comprising a décor paper prepared from a paper slurry, wherein the paper slurry comprises a treated inorganic pigment, wherein the treated inorganic pigment comprises an inorganic pigment comprising a pigment surface area of about 30 to about 75 m 2 /g; wherein the pigment surface is treated with an organic treating agent comprising a polyalkanol alkane or a polyalkanol amine, present in the amount of at least about 1.5% based on the total weight of the treated inorganic pigment, and wherein the treated inorganic pigment has a RHI(rat hole index) of about 7 to about 11.

17. The laminate of claim 16 further comprising a Kraft paper core layer, a backing layer, and a melamine formaldehyde surface overlay.

18. A laminate of claim 17 comprising a ΔE* value of 2.4 or less after 72 hrs exposure in the referenced light cabinet.

Assignments (7)