Stock material or miscellaneous articles – Structurally defined web or sheet – Continuous and nonuniform or irregular surface on layer or...
Patent
1992-02-07
1993-08-31
Herbert, Jr., Thomas J.
Stock material or miscellaneous articles
Structurally defined web or sheet
Continuous and nonuniform or irregular surface on layer or...
428291, 428405, 428489, B32B 516
Patent
active
052407608
ABSTRACT:
Roofing granules having surfaces treated with a polysiloxane that has a long-chain hydrocarbon group bonded to a silicon atom on the polysiloxane backbone wherein the long-chain hydrocarbon group preferably is a straight or branched aliphatic group having 5 to 30 carbon atoms and the 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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patent: 3752696 (1973-08-01), Beyard et al.
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patent: 5035748 (1991-07-01), Burow et al.
U.S. patent application Ser. No. 07/574,264.
Babirad Stefan A.
George Billy L.
Nauman Margaret M.
Griswold Gary L.
Hanson Karl G.
Herbert, Jr. Thomas J.
Kirn Walter N.
Minnesota Mining and Manufacturing Company
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