Polysiloxane brick surface treatment

Details Polysiloxane brick surface treatment Polysiloxane brick surface treatment

C - Chemistry, Metallurgy

04

B

C04B 41/82 (2006.01)

Patent

CA 2188347

This invention relates to an improved process for the preparation of dry-pressedbrick from clay which includes at least the steps of: screening the clay to a mesh size between 4 to 20 openings per inch; pressing the clay into at least one die to form at least one compacted green brick having a density range of 2.10 to 2.35 g/cc; firing the green brick in a kiln to a temperature of at least 1,800°F to form at least one fired brick; cooling the fired brick to a room temperature; and sealing the brick with a sealing agent selected from the group consisting of siliconates, silicone emulsions, silane masterbatches, polysiloxanes, polysiloxane derivatives, silicone microemulsions and blends thereof. The process can further include the step of brushing a top surface of the green brick so as to impart a plurality of ridges on the top surface to achieve a skid/slip resistance of 0.8 according to the American Disabilities Act. The problem of efflorescence is minimized by practicing the invention.

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