Coating composition

Claim 1

A MULTIPLE STEP PROCESS FOR PREPARING AN AQUEOUS DISPERSION OF A COATING COMPOSITION HAVING A VISCOSITY ADAPTED FOR ROLLER COATING OF SURFACES WHICH COMPRISES: AS A FIRST STEP, FORMING AN AQUEOUS DISPERSION OF DISCRETE LARGE PARTICLES OF A VISCOUS HYDROPHOBIC COATING MATERIAL MOST OF WHICH ARE LARGER THAN 50 MICRONS UNDER STRENUOUS DISPERSING CONDITIONS INCLUDING VIGOROUSLY AGITATING A VISCOUS HYDROPHOBIC COATING MATERIAL OVER AN EXTENDED PERIOD OF TIME WITH A COLLOIDAL SOLUTION OF A QUANTITY OF AN ORGANIC HYDROPHILIC PROTECTIVE COLLOID SUFFICIENT TO MAINTAIN SAID LARGE PARTICLES IN THE DISPERSED STATE WITHOUT SUBSTANTIAL COALESENCE BUT INSUFFICIENT TO SUBSTANTIALLY FURTHER REDUCE THE SIZES OF SAID PARTICLES UNDER THE CONDITIONS AFORESAID TO PROVIDE THEREBY AN AQUEOUS DISPERSION HAVING A VISCOSITY CONSISTENCY BELOW 65 KREBS UNITS; AND AS A SECOND STEP, INTRODUCING INTO THE FORMED AQUEOUS DISPERSION ADDITIONAL QUANTITIES OF AN ORGANIC HYDROPHILIC PROTECTIVE COLLOID SUFFICIENT TO INCREASE THE VISCOSITY OF THE RESULTING AQUEOUS DISPERSION TO BETWEEN ABOUT 77 TO 95 KREBS UNITS UNDER SUBSTANTIALLY LESS STRENUOUS DISPERSING CONDITIONS INCLUDING AGITATION FOR A SUBSTANTIALLY SHORTER PERIOD OF TIME SUFFICIENT TO FORM THEREBY A HOMOGENOUS DISPERSION OF THE ADDITIONAL COLLOID BUT INSUFFICIENT TO SUBSTANTIALLY REDUCE THE SIZES OF SAID LARGE PARTICLES; THE TOTAL AMOUNT OF PROTECTIVE COLLOID BEING SUFFICIENT TO SUBSTANTIALLY DECREASE THE SIZE OF SAID LARGE PARTICLES UNDER THE DISPERSING CONDITIONS OF SAID FIRST STEP.