Organosilicon emulsions for rendering porous substrates water repellent
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United States of America Patent
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Sep 12, 1995
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app pub date -
Jan 13, 1993
filing date -
Jan 13, 1993
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Abstract
There are provided aqueous emulsions useful for rendering porous substrates water repellent comprising a) a hydrolyzable silane and/or siloxane, b) an organopolysiloxane resin consisting of R.sub.3 SiO.sub.0.5 siloxane units and SiO.sub.2 siloxane units, or R.sub.3 SiO.sub.0.5 units, R.sub.2 SiO units, and SiO.sub.2 siloxane units, c) a filler having a surface area of at least 40 m.sup.2 /g, d) an emulsifying agent, and e) water. Such compositions are especially useful on masonry exposed to wind-driven rain.
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