Patent ID: 7255738
Filing Date: 2007-08-14
Classification: B32B,C04B,Y10T

Abstract:
1. A process for preparing a light weight structure comprising the steps of: passing an expanded polystyrene through a plurality of meshes to remove a fraction therefrom of particles having dimensions of less than 0.0625 inches and greater than 0.5 inches to obtain an expanded polystyrene particulate; mixing a dispersant suppressive of electrostatic attractions in an amount of 0.125 to 0.50 pounds per gallon of said polystyrene with said expanded polystyrene particulate to form a dry lightweight dispersal; thereafter combining said dispersal with a matrix material selected from a group consisting of magnesium oxy-chloride cement magnesium oxy-sulfate cement, sulfa alumina cement, silicate cement, and polymer modified Portland cement at a ratio of between 0.25 to 0.75 pound of said matrix material per gallon of said dispersal; wetting said dispersal with water; and allowing sufficient time for said matrix material to set.