Polysiloxane treated roofing granules

Details Polysiloxane treated roofing granules Polysiloxane treated roofing granules

C - Chemistry, Metallurgy

09

C

C09C 3/12 (2006.01) B01J 2/00 (2006.01) C04B 20/10 (2006.01) E04D 7/00 (2006.01)

Patent

CA 2087391

Abstract of the Disclosur Roofing granules having surfaces treated with a polysiloxane that has a long-chain hydrocarbon group bonded to a silicon atom on the polysiloxane backbone. The long-chain hydrocarbon group preferably is a straight or branched aliphatic group having 5 to 30 carbon atoms. Roofing granules treated with such polysiloxanes demonstrate good dust control and water repellency, and also resist staining from oils in asphalt-based substrates.

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