Process for improved glass article coating, and such coated articles
AssigneeLAM Partnership
InventorsClement V. Fogelberg, Joseph H. Romig
Life of this patent
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Abstract
A method for "hot end" coating of vitreous articles, and particularly glassware such as bottles, with zinc oxide and magnesium oxide coatings from aqueous solutions of organic and inorganic zinc compounds, magnesium compounds, and mixtures thereof. Particularly useful are zinc acetate and magnesium acetate, which are applied to the vitreous surface at an elevated temperature, and preferably between about 425.degree. C. and 650.degree. C., to evaporate the water from the solution and pyrolytically decompose the metal compound or compounds to form refractory oxide coatings which are transparent and adherent, and articles coated by such a method.
Claims43
A method for forming protective coatings upon glass articles comprising:
- positioning a glass article heated to an elevated temperature within a coating location;
- applying an aqueous solution of a coating compound selected from the group consisting of magnesium compounds, zinc compounds and mixtures thereof upon the surface of the heated glass article;
- evaporating the solvent from the solution at the surface of the glass article;
- pyrolytically decomposing the remaining compound at the surface of the glass article to form a continuous, adherent and substantially transparent coating of the coated compound metal oxide upon the surface of the glass article;
- cooling the glass article and metal oxide coating thereon;
- and
- applying a second, lubricious coating thereto at a lower temperature.
A method for forming protective coatings on glass comprising:
- spraying an aqueous solution of magnesium acetate onto the surface of glass at an elevated temperature;
- evaporating the solvent from the aqueous solution of magnesium acetate at the surface of the glass;
- pyrolytically decomposing the magnesium acetate at the surface of the glass to form a continuous, transparent film of magnesium oxide which tenaciously adheres to the surface of the glass;
- cooling the glass article and magnesium oxide film thereon;
- and
- applying a second, lubricious coating thereto at a lower temperature.
A method for forming protective coatings on glass comprising:
- spraying an aqueous solution of zinc acetate onto the surface of glass at an elevated temperature;
- evaporating the solvent from the aqueous solution of zinc acetate at the surface of the glass;
- pyrolytically decomposing the zinc acetate at the surface of the glass to form a continuous, transparent film of zinc oxide which tenaciously adheres to the surface of the glass
- cooling the glass article and zinc oxide film thereon;
- and
- applying a second, lubricious coating thereto at a lower temperature.
A method for forming protective coatings on glass comprising:
- spraying an aqueous solution of magnesium acetate and zinc acetate onto the surface of glass at an elevated temperature;
- evaporating the solvent from the aqueous solution of magnesium acetate and zinc acetate at the surface of the glass;
- pyrolytically decomposing the magnesium acetate and zinc acetate at the surface of the glass to form a continuous, transparent film of magnesium oxide and zinc oxide which tenaciously adheres to the surface of the glass;
- cooling the glass article and magnesium oxide and zinc oxide film thereon;
- and
- applying a second, lubricious coating thereto at a lower temperature.
A glass article having protective and lubricious coatings thereon, said articles comprising:
- a glass surface;
- a metal oxide coating selected from the group consisting of transparent magnesium oxide, zinc oxide and mixtures thereof adhered directly to the surface;
- and
- a lubricious coating of an organic compound adhered to the metal oxide.
Glassware having protective coatings thereon, the glassware comprising:
- a glass surface;
- a transparent, continuous, thin coating of magnesium oxide adhered to the glass surface;
- and
- a lubricious coating including at least one constituent selected from the group consisting of waxy polyolefins, beeswax, fatty acids, alkali metal salts of fatty acids and polyvinyl alcohols adhered to the magnesium oxide coating.
Glassware having protective coatings thereon, the glassware comprising:
- a glass surface;
- a transparent, continuous, thin coating of zinc oxide adhered to the glass surface;
- and
- a lubricious coating including at least one constituent selected from the group consisting of waxy polyolefins, beeswax, fatty acids, alkali metal salts of fatty acids and polyvinyl alcohols adhered to the zinc oxide coating.
Glassware having protective coatings thereon, the glassware comprising:
- a glass surface;
- a transparent, continuous, thin coating of zinc oxide and magnesium oxide adhered to the glass surface;
- and
- a lubricious coating including at least one constituent selected from the group consisting of waxy polyolefins, beeswax, fatty acids, alkali metal salts of fatty acids and polyvinyl alcohols adhered to the zinc oxide and magnesium oxide coating.
A method for forming protective coatings on glass articles, the method comprising:
- positioning a glass article heated to an elevated temperature within a coating location;
- applying a coating compound selected from the group consisting of magnesium compounds, zinc compounds and mixtures thereof to the surface of the heated glass article;
- melting the coating compound to form a coating at the surface of the glass article;
- pyrolytically decomposing the coating compound at the surface of the glass article to form a continuous, adherent and substantially transparent coating of the coating compound metal oxide upon the surface of the glass article;
- and
- applying a second lubricious coating to the metal oxide coating at a temperature below that at which pyrolytic decomposition takes place.
Dependencies are inferred from the claim text.