Treating building materials with a compound containing tin...

Details Treating building materials with a compound containing tin... Treating building materials with a compound containing tin...

A - Human Necessities

01

N

A01N 55/04 (2006.01)

Patent

CA 2125971

2125971 9312053 PCTABS00022 Building materials such as concrete were previously coated with silicones or silicates for water repellency, but such treatments do not prevent algae or other growths. It has now been determined that building materials can be protected from the growth of algae by being treated with a compound containing tin covalently bonded to a silylating group such that cleavage of the covalent bonds due to hydrolysis or photolysis is minimized, thus making the treatment ecologically safe. One such compound is (n^_-Bu)3SnCH2CH2Si(OEt)3. The tin compound can either be incorporated into raw materials from which building materials are to be made, or it can be applied to the finished building materials. When the tin compounds is applied to a building material that is algae streaked, the streaking should disappear.

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