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Post Info TOPIC: Alkali metal silicate-zinc hydroxychloride Tile And Shingle Roof Coating Composition


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Alkali metal silicate-zinc hydroxychloride Tile And Shingle Roof Coating Composition
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James R. Lodge
Abstract
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Abstract | Description | Claims

Abstract
An aqueous, alkaline, inorganic composition, comprising water-soluble alkali metal silicate and zinc hydroxychloride, is used to coat substrates normally infested by algae, such as silicate-containing building material, e.g., concrete roofing tiles, to prevent or minimize algal infestation on said substrates, said algae otherwise imparting a dark, unsightly appearance thereto.

Patent number: 3998644
Filing date: Oct 28, 1975
Issue date: Dec 21, 1976
Inventor: James R. Lodge
Assignee: Minnesota Mining and Manufacturing Company

U.S. Classification
106/15R; 106/74; 106/84; 106/105; 106/287S

International Classification
C09D 514

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Citations

Patent NumberTitleIssue date
1321429PLASTIC MATERIALNov 1919
1923769REFRACTORY MATERIAL FOR USE IN METAL CASTINGAug 1933
2091991GRANULATED MATERIAL ANB PKOCESS OF X M MAKING THE SAMESep 1937
2310128OXTCHLOBIDE COATINGFeb 1943
2769716FUNGISTATIC PIGMENT AND COATING COMPOSITIONNov 1956
2952553METHOD FOR FORMING A METAL CASTING MOLDSep 1960
3507676ZINC CONTAINING ALGICIDALApr 1970

Referenced by

Patent NumberTitleIssue date
5366767Composition and method for preventing moss growth on roofsNov 22, 1994
5411803Granular materials having an improved ceramic coating, methods of preparing same, and composite sheets including sameMay 2, 1995
5589229Composition and method for preventing moss growth on roofsDec 31, 1996
6214466Algae-resistant roofing granulesApr 10, 2001
6277346Photocatalyst composite and process for producing the sameAug 21, 2001
6498000Photocatalyst composite and process for producing the sameDec 24, 2002
6838152Low pigments costs algae-retardant roofing granule products containing metallic copperJan 4, 2005

Claims

What is claimed is:

1. An inorganic coating composition comprising about 55 to 70 weight percent water, a water-soluble alkali metal silicate, and zinc hydroxychloride of the formula Zn.sub.5 (OH).sub.8 Cl.sub.2, in an amount of at least 0.5 mole for each mole of said alkali metal silicate, said composition upon being applied as a coating and dried at ambient temperatures of about 60.degree. to 100.degree. F. forming a hard, durable, water-insoluble, water-permeable, weather-resistant, inorganic, algicidal coating.

2. An inorganic coating composition comprising about 55 to 70 weight percent water, a water-soluble sodium silicate having an Na.sub.2 O:SiO.sub.2 weight ratio of 1:2.75 to 1:3.75 and zinc hydroxychloride of the formula Zn.sub.5 (OH).sub.8 Cl.sub.2.H.sub.2 O in an amount of about 0.5 to 1.0 mole for each mole of said sodium silicate, said composition upon being applied as a coating and dried at ambient temperature of 60.degree. to 100.degree. F. forming a hard, durable, water-insoluble, water-permeable, weather-resistant, inorganic, algicidal coating.

3. A coating composition containing about 55 to 70 weight percent water, sodium silicate and about 0.8 to 1 mole of zinc hydroxychloride per mole of sodium silicate, said composition being formed by mixing an aqueous inorganic solution containing 25 to 35 weight percent water-soluble sodium silicate, having an Na.sub.2 O:SiO.sub.2 weight ratio of 1:2.75 to 1:3.75, with an aqueous paste comprising 35 to 55 weight percent zinc hydroxychloride, of the formula Zn.sub.5 (OH).sub.8 Cl.sub.2.H.sub.2 O, said composition upon being applied as a coating and dried at ambient temperature of 60.degree. to 100.degree. F. forming a hard, durable, water-insoluble, water-permeable, weather-resistant, inorganic, algicidal coating.

4. An inorganic coating composition comprising about 55 to 70 weight percent water, a water-soluble sodium silicate having an NaO.sub.2 :SiO.sub.2 weight ratio of 1:3.22 and zinc hydroxychloride of the formula Zn.sub.5 (OH).sub.8 Cl.sub.2.H.sub.2 O in an amount of about 0.5 to 1.0 mole for each mole of said sodium silicate, said composition upon being applied as a coating and dried at an ambient temperature of 60.degree. to 100.degree. F. forming a hard, durable, water-insoluble, water-permeable, weather-resistant, inorganic, algicidal coating.



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