Process for rendering building materials hydrophobic

Details Process for rendering building materials hydrophobic Process for rendering building materials hydrophobic

B - Operations, Transporting

32

B

117/213

B32B 13/00 (2006.01) C04B 41/49 (2006.01)

Patent

CA 1103528

ABSTRACT OF THE DISCLOSURE An improved process is provided for imparting hydrophobic preper- ties to building materials by applying solutions of a solvent containing or- ganosilicon compounds in an amount of from 0.2 to 25 percent by weight based on the weight of the organosilicon compound to the surface of building mater- ials. The improvement comprises adding to the solutions of organosilicon com- pounds a small amount e.g. from 0.01 to 0.5 percent by weight of fillers hav- ing a surface area of at least 50 m2/gm. The desired properties are achieved more quickly, and a higher degree of water repellency is achieved. Moreover, the process does not require that loose filler residue be removed.

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