Surface coating compositions comprising plaster of paris and method of producing the same

Claim 1

A PACKAGED PRODUCT FOR FORMING SURFACINGS OF COATINGS, COMPRISING A COMPOSITION CONSISTING ESSENTIALLY OF: (A) GRADED SAND, (B) GRADED MINERAL FILLER OF PARTICLE SIZES, SMALLER THAN THOSE OF SAID GRADED SAND, (C) A WATER-SOLUBLE ORGANIC ADHESIVE BINDER, (D) PLASTER OF PARIS IN THE RANGE OF ABOUT 10% TO ABOUT 45% BY WEIGHT BASED ON THE TOTAL WEIGHT OF THE COMPOSITION, AND (E) WATER SAID WATER BEING PRESENT IN AN AMOUNT WITHIN THE RANGE OF ABOUT 25% TO ABOUT 60% BASED ON THE TOTAL WEIGHT OF THE COMPOSITION, SAID AMOUNT OF WATER SERVING TO CAUSE THE COMPOSITION TO HARDEN INTO A COHERENT SOLID BODY WITHIN ABOUT ONE HALF HOUR AFTER COMPLETE MIXING OF SAID INGREDIENTS, SAID HARDENED BODY BEING RADILY COMMINUTABLE BY SIMPLE MECHANICAL ACTION INTO THE FORM OF A SPREADABLE, LOOSE, GRANULAR MASS OF PLASTIC CONSISTENCY WHICH DOES NOT REHARDEN INTO A COHERENT SOLID BODY UNTIL THE WATER CONTENT OF SAID SPREADABLE MASS IS ELIMINATED.