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| Method for improving bubble surface area exposure |
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| Dewatering of sludge using nitrate |
| This invention relates to a process and apparatus for thickening or dewatering of sludges produced ... |
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| Preaeration treatment of volatile wastewater components |
| It is an object of the invention to provide an aerobic process for treating wastewater contaminated ... |
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| Biological oxidation and flotation apparatus and method |
| OF METHOD AND APPARATUS The apparatus shown in FIGS. 1-5 and 7-13 is designed for use in a sewage ... |
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| Two stage wastewater flotation |
| I claim: 1. A method for removing particulates from wastewater, wherein said particulates comprise ... |
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| Preparation of an animal feed supplement from fish cannery process waste water |
| What is claimed is: 1. A method for the preparation of an animal feed from fish cannery wastes ... |
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| Process for waste water purification |
| OF THE INVENTION This invention is described in greater detail with respect to purification of the ... |
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| Aeration tank for activated-sludge process sewage treatment |
| This invention relates generally to aeration tanks for activated-sludge process sewage treatment ... |
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| Flotation apparatus utilizing a novel floc barrier and current diverting means |
| OF THE PREFERRED EMBODIMENT With reference to FIG. 1, wherein like reference numerals designate ... |
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Haze-free infrared-reflecting coated glass
| Details |
Inventors: Bloss, Karl H.; Davis, James A.; Neuman, George A.;
Assignee: PPG Industries, Inc. (Pittsburgh, PA)
Primary Examiner: Bell; Janyce
Assistant Examiner:
Attorney, Agent or Firm: Seidel; Donna L.
A novel organotin coating composition comprising tributyltin dimethylpropionate is disclosed, along with a method for preparing it and a method for pyrolyzing it to form a tin oxide film on the surface of a substrate. |
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DETAILED DESCRIPTION We claim: 1.
A method of forming a tin oxide coating comprising contacting a surface of a substrate in an oxidizing atmosphere with a mixture consisting essentially of tributyltin dimethylpropionate vapor and a carrier gas at a temperature sufficient to thermally react said tributyltin dimethylpropionate to deposit a tin oxide film on said surface.
2.
A method according to claim 1, wherein said substrate is glass.
3.
A method according to claim 1, wherein said carrier gas is air.
4.
A method according to claim 3, wherein said mixture further comprises a fluorine-containing compound.
5.
A method according to claim 4, wherein said fluorine containing compound is trifluoroacetic acid.
6.
A method according to claim 5, wherein said mixture comprises about 1 to 10 percent by weight trifluoroacetic acid based on the weight of tributyltin dimethylpropionate.
7.
A method according to claim 6, wherein said mixture comprises about 5 percent by weight trifluoroacetic acid.
8.
A method according to claim 1, wherein said substrate is contacted with tributyltin dimethylpropionate at a temperature of at least 350.
degree.
C.
9.
A method according to claim 8, wherein said substrate is contacted with tributyltin dimethylpropionate at a temperature in the range of 500.
degree.
to 650.
degree.
C.
10.
A method according to claim 9, wherein said substrate is contacted with tributyltin dimethylpropionate at a temperature in the range of 630.
degree.
to 640.
degree.
C.
Description:
BACKGROUND OF THE INVENTION The present invention relates generally to the art of infrared-reflecting coated glass products, and more particularly to non-irridescent, high transmittance, low emissivity, infrared-reflecting coated glass products.
Transparent infrared-reflecting films such as tin oxide may be deposited on a substrate such as glass by a variety of methods, including the application of thermally decomposable compounds to a heated surface.
Useful methods for forming transparent infrared-reflecting tin oxide films are taught in U
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