Paper coating dispersions and process

Claim 2

In a publication paper coating for use in the manufacture of publication paper to enhance the ink receptivity of the paper, a dispersion composition comprising: A. between about 70 and 95 percent by weight of clay; B. between about 5 and 20 percent by weight of a binder selected from the group consisting of starch and latex; C. between about 0.1 and 2 percent by weight of a dispersing agent; D. between about 0.1 and 5 percent by weight of a lubricant consisting essentially of a. between about 80% and 99% by weight of a hard, high molecular weight wax having a melting point greater than 180° F.; and b. between about one and 20% by weight of a surfactant, wherein said composition is dispersed in a sufficient quantity of water to obtain a solid content between 50 and 75 percent. pg,18

Claim 3

In a publication paper coating dispersion system which enhances the ink receptivity and spreadability and incorporates clay, a binder, a dispersing agent, and a lubricant, the improvement comprising a lubricant consisting essentially of A. between about 20% and 65% by weight of a hard, high molecular weight wax having a melting point greater than 180° F.; B. between about 35% and 80% by weight water; and C. up to 10% by weight of a surfactant.

Claim 4

In a publication paper coating dispersion system which enhances the ink receptivity and spreadability and incorporates clay, a binder, a dispersing agent, and a lubricant, the improvement comprising a lubricant consisting essentially of A. between about 20% and 65% by weight of a hard, high molecular weight wax having a melting point greater than 180° F.; B. between about 35% and 80% by weight water; and C. up to 10% by weight of a surfactant.

Claim 5

A publication paper dispersion system as defined in claim 2, wherein said hard, high molecular weight wax is powdered to a particle size less than 50 microns.

Claim 6

A publication paper dispersion system as defined in claim 2, wherein said hard, high molecular weight wax comprises a Fischer-Tropsch wax.

Claim 7

A publication paper dispersion system as defined in claim 2, wherein said wax is one selected from the group consisting of polyethylene, micro crystalline waxes, ester waxes, and stearamides.

Claim 8

A publication paper dispersion system as defined in claim 2, wherein said wax has a molecular weight greater than 700.

Claim 9

A publication paper dispersion system as defined in claim 2, wherein said surfactant is an anionic surfactant.

Claim 10

A publication paper dispersion system as defined in claim 2, wherein said surfactant is a nonionic surfactant.

Claim 11

A publication paper dispersion system as defined in claim 8, wherein said surfactant has a hydrophile-lipophile balance number between about 12 and 14.

Claim 12

A publication paper dispersion system as defined in claim 2, wherein said surfactant is one selected from the group consisting of nonyl phenoxy poly ethoxy ethanol, octyl phenoxy poly ethoxy ethanol, and bis(tridecyl) esters of sulfosuccinic acid.

Claim 13

A publication paper dispersion system as coating dispersion system which enhances the ink receptivity and spreadability and incorporates clay, a binder, a dispersing agent, and a lubricant, the improvement comprising a lubricant comprising: A. between about 80% and 99% by weight of a hard, high molecular weight wax having a melting point greater than 180° F.; and B. between about 1% and 20% by weight of a surfactant.

Claim 14

A publication paper dispersion system as coating dispersion system which enhances the ink receptivity and spreadability and incorporates clay, a binder, a dispersing agent, and a lubricant, the improvement comprising a lubricant comprising: A. between about 80% and 99% by weight of a hard, high molecular weight wax having a melting point greater than 180° F.; and B. between about 1% and 20% by weight of a surfactant.

Claim 15

A publication paper dispersion system as defined in claim 11, wherein said hard, high molecular weight wax is powdered to a particle size less than 50 microns.

Claim 16

A publication paper dispersion system as defined in claim 11, wherein said hard, high molecular weight wax comprises a Fischer-Tropsch wax.

Claim 17

A publication paper dispersion system as A lubricant defined in claim 11, wherein said hard, high molecular weight wax has a molecular weight greater than 700.

Claim 18

A process for preparing publication paper having desirable ink receptive qualities for a variety of inks comprising for the steps of A. mixing a dispersion agent in water; B. mixing clay into the water and dispersion agent solution; C. separately preparing an adhesive; D. mixing the adhesive into the clay dispersion solution; E. separately preparing a lubricant additive by a. dispersing a surfactant in water at room temperature with gentle agitation; b. slowly adding and mixing a hard, high molecular weight wax in the surfactant and water mixture until said wax is thoroughly wetted; c. dispersing any remaining particle agglomerates; and d. de-aerating the lubricant dispersion system, F. mixing the lubricant additive in the clay-adhesive dispersion; G. adjusting the water quantity to obtain the desired solid content; and H. coating manufactured raw paper with the dispersion system, thereby imparting the desired characteristics to the resulting publication paper.

Claim 19

A process for preparing publication paper having desirable ink receptive qualities for a variety of inks comprising for the steps of A. mixing a dispersion agent in water; B. mixing clay into the water and dispersion agent solution; C. separately preparing an adhesive; D. mixing the adhesive into the clay dispersion solution; E. separately preparing a lubricant additive by a. dispersing a surfactant in water at room temperature with gentle agitation; b. slowly adding and mixing a hard, high molecular weight wax in the surfactant and water mixture until said wax is thoroughly wetted; c. dispersing any remaining particle agglomerates; and d. de-aerating the lubricant dispersion system, F. mixing the lubricant additive in the clay-adhesive dispersion; G. adjusting the water quantity to obtain the desired solid content; and H. coating manufactured raw paper with the dispersion system, thereby imparting the desired characteristics to the resulting publication paper.