Ppg Industries, Inc.

Ppg Industries Ohio, Inc.

John F Sopko

George A Neuman

Patricia Ruzakowski Athey

Douglas S Dauson

Royann L Stewart-Davis

David E Lecocq

James W McCamy

Michael O Okoroafor

Dennis S Postupack

Janos Szanyi

Huawen Li

Krishna Simhan

A coating apparatus includes non-orthogonal coater geometry to improve coatings on a glass ribbon, and to improve yields of such coatings. The apparatus includes a first arrangement to move the ribbon along a first imaginary straight line through a coating zone provided in a glass forming chamber. The coater has a coating nozzle and an exhaust slot, each have a longitudinal axis. The coating nozzle directs coating vapors toward the coating zone, and the exhaust slot removes vapors from the coating zone. A second arrangement mounts the coater in spaced relation to the path with the coating nozzle and the exhaust slot facing the coating zone. A second imaginary straight line is normal to the longitudinal axis of the coating nozzle, and the first imaginary line and the second imaginary line subtend an angle in the range of greater than zero degrees to 90 degrees.

Non-orthogonal coater geometry for improved coatings on a substrate

The durability of a transparent pyrolytic spray applied coating is improved by providing a spray solution of metal acetylacetonates having different particle size distribution. More particularly, the particle size distribution of each of the metal acetylacetonates is a function of its melting temperature, and optionally of its melting temperature and solubility.

Aqueous suspension for pyrolytic spray coating

A coating in accordance with the invention has a substantially crystalline first layer with a substantially crystalline second layer provided over the first layer. A breaker layer is provided between the first and second layers and is configured to prevent or at least reduce epitaxial growth of the second layer on the first layer. A color suppression layer may be provided below the first layer. The coating can be provided on a substrate to make a coated article. A method of coating a substrate includes depositing a substantially crystalline first layer over at least a portion of the substrate and depositing a breaker layer over the first layer. The breaker layer is configured to prevent or at least reduce epitaxial growth of a subsequently deposited layer on the first layer.

Methods of making low haze coatings and the coatings and coated articles made thereby

This invention relates to a two layers or more anti-static film coating deposited on a substrate. Selected layers of the films may have anti-static and/or electromagnetic properties. In one embodiment, the film farthest from the substrate has an index of refraction lower than the underlying film. In another embodiment, the surface of the film is roughened to provide a graded index of refraction.

Conductive antireflective coatings and methods of producing same

An apparatus for coating a moving substrate which provides means for directing a coating composition vapor toward a substrate surface and moving portions of the vapor in opposite directions. The apparatus of the present invention may have the exhaust means on either side of the vapor directing means spaced at different distances from the vapor directing means, or the exhaust means may be spaced equally from the vapor directing means, but at different distances from the substrate surface. In another embodiment, the apparatus comprises the means to alter the flow volume of the vapor directing means and the two exhaust means such that the flow volume of the first and second exhaust means are not equal, such as by the exhaust means having openings of unequal surface area, wherein the exhaust means may be spaced equally or unequally from the vapor directing means at the same or different distances from the substrate surface. In another embodiment, the apparatus further comprises a structural element bridging the space between the vapor directing means and the exhaust means, which may be spaced equally or unequally from the vapor directing means, and at the same or different distances from the substrate surface.

Apparatus for coating a moving glass substrate

A method for coating a moving substrate provides a coating having a chemical composition which varies continuously from the interface with the substrate to the opposite surface of the coating. The method involves directing a vapor coating composition toward a substrate surface and moving portions of the vapor in opposite directions. A vapor coating mixture may include a tin-containing precursor and a silicon-containing precursor. An accelerant, e.g. a phosphorus-containing precursor, may be used with the metal-containing precursors to increase the deposition rate of the coating. The coating deposited on the substrate has regions of continuously varying weight percent of silicon oxide and tin oxide as the distance from the substrate-coating interface increases, with the surface of the coating farthest from the substrate-coating interface being predominantly tin oxide. The regions of varying composition provide the coating with varying indices of refraction to eliminate iridescence to provide a coated article, particularly a tin oxide coated glass article, with a neutral color.

Method for coating a moving glass substrate

An apparatus for coating a glass ribbon has an exhaust on each side of a coating unit at different distances therefrom. With this arrangement, portions of the ribbon upstream and downstream of the coating unit are exposed to coating vapors from the coating unit for different periods of time. A coating mixture includes tin containing precursors and a silicon containing precursor. The silicon containing precursor has the structural formula ##STR1## where R.sub.1 is a group which does not have an oxygen available to form a peroxide, R.sub.2 is a functional group giving the silicon containing precursor the ability to be easily converted to silicon oxide coating, R.sub.3 is a bridging group to provide for multiple silicon atoms and R.sub.4 completes the bonding on the foundation silicon atom. An accelerant e.g. a phosphorus containing precursor may be used with the metal containing precursors to increase the deposition rate of the coating. The coating deposited on the glass has regions of continuously varying weight percent of silicon oxide and tin oxide as the distance from the glass-coating interface increases, with the surface of the coating farthest from the glass-coating interface being predominantly tin oxide. The regions within the coating provide the coating with different indices of refraction to eliminate iridescence resulting from increased thickness of the tin oxide at the outer coating surface and to provide the coated glass article with a neutral color. When phosphorus is used as the accelerant, the percent of crystallinity is reduced and approaches O, thereby reducing or eliminating the coating haze.

Coating apparatus, method of coating glass, compounds and compositions

A method is disclosed for depositing a coating from a gaseous stream of a powder coating reactant, wherein the carrier gas is supplied at a high volume rate (at least 100 cubic ft./min) and low pressure (not greater than one psi).

Method of and apparatus for applying powder coating reactants

A method is disclosed for improving the uniformity and durability of a pyrolytically deposited metal oxide film on glass by cooling the coating solution and/or the atomizing air prior to the application of the coating composition to the hot glass surface.

Method for improving the alkali durability of metal oxide films formed

A continuous glass ribbon advances from a float forming chamber past a first heat source and into a coating chamber where a surface of the glass ribbon is provided with a pyrolytic oxide coating as a second heat source heats the opposed surface of the glass ribbon. Thereafter the glass ribbon is advanced into an annealing lehr to relieve residual stress in the glass ribbon. The first heat source reduces the heat loss of the ribbon as it advances into the coating chamber to provide a durable pyrolytic oxide coating on the glass ribbon. The second heat source heats the ribbon to minimize or eliminate glass ribbon warpage.

Method and apparatus for coating a glass substrate

A metal reactant, dissolved in a volatile solvent, is sprayed into converging reactive carrier gas streams, is vaporized and is carried past a heater for ultimate discharge against a heated substrate whereupon the metal reactant and a portion of the reactive gas streams react to form an adherent coating on the substrate.

Coating composition vaporizer

A metal oxide coating is applied to a hot glass surface by contacting the surface with a mixture of carrier air, vaporized solvent and a vaporized metal containing reactant. The mixture is directed against the glass through an elongated, converging slot-nozzle, the interior surfaces of which have an increasing radius of curvature towards the exit end, nozzle at a Reynolds number exceeding 2500 with the nozzle-to-glass spacing at least 1.25 times the characteristic dimension of the nozzle.

Growing community of inventors

Trafford, PA, United States of America

John F Sopko