Algae resistant roofing granules with controlled algaecide leaching rates, algae resistant shingles, and process for producing same

Algae-resistant roofing granules are formed by extruding a mixture of mineral particles and a binder to form porous granule bodies, and algaecide is distributed in the pores. Release of the algaecide is controlled by the structure of the granules.

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Bibliographic Details
Main Authors JOHNSON ANDREW G, SALVATORE JAMES A, HARDY ANNE B, KALKANOGLU HUSNU M, SHIAO MING L, HONG KEITH C
Format Patent
LanguageEnglish
Published 23.12.2004
Edition7
Subjects
BUILDING
FIXED CONSTRUCTIONS
GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC
GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS
GUTTERS
ROOF COVERINGS
ROOF-WORKING TOOLS
SKY-LIGHTS
TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
TECHNICAL SUBJECTS COVERED BY FORMER USPC
TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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Summary:Algae-resistant roofing granules are formed by extruding a mixture of mineral particles and a binder to form porous granule bodies, and algaecide is distributed in the pores. Release of the algaecide is controlled by the structure of the granules.
Bibliography:Application Number: US20030600809