Method for applying a polymer powder onto a pre-heated glass substrate and the resulting article
AssigneeLibbey-Owens-Ford Co.
InventorsPeter F. Gerhardinger, Douglas M. Nelson
Life of this patent
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Abstract
A method of forming a polymer backing on a glass substrate through the use of a pre-polymer powder applied onto the surface of the substrate. The backing is applied on-line in an existing substrate manufacturing or fabricating process while the substrate is at a high enough temperature to polymerize the powder. The resulting backed substrate is durable and abrasion resistant and exhibits excellent opacification and adhesion properties.
Claims28
A process for applying a polymer backing onto a glass substrate, comprising the steps of:
- (a) providing a pre-polymer powder;
- (b) conveying said powder to a point near a float glass ribbon to be coated, said float glass ribbon being at a temperature above the polymerization temperature of said powder;
- and
- (c) discharging said powder onto said float glass ribbon wherein said powder polymerizes to form a backing on said float glass ribbon.
A process for applying an epoxy backing onto a glass substrate, comprising the steps of:
- (a) providing an epoxy powder;
- (b) conveying said powder to a point near a float glass ribbon to be coated, said float glass ribbon being at a temperature above the polymerization temperature of said epoxy powder;
- and
- (c) discharging said epoxy powder onto said float glass ribbon wherein said epoxy powder polymerizes to form a thermoset epoxy backing on said float glass ribbon.
A process for applying an epoxy backing onto a float glass ribbon during its manufacture, comprising the steps of:
- (a) providing a epoxy powder including an organofunctional silane adhesion promoter selected from the group consisting of amino silane, mercapto silane, glycidoxy silane, or isocyanato silane;
- (b) conveying said powder to a point near a float glass ribbon to be coated, said float glass ribbon being at a temperature of about 300.degree.-450.degree. F., said temperature being above the polymerization temperature of said epoxy powder;
- and
- (c) discharging said epoxy powder onto said float glass ribbon wherein said epoxy powder polymerizes to form a thermoset epoxy backing on said glass substrate.
A process for applying a polymer backing onto a glass substrate, comprising the steps of:
- (a) providing a pre-polymer powder;
- (b) conveying said powder to a point near a tempered glass sheet to be coated, said tempered glass sheet being at a temperature above the polymerization temperature of said powder;
- and
- (c) discharging said powder onto said tempered glass sheet wherein said powder polymerizes to form a backing on said tempered glass sheet.
Dependencies are inferred from the claim text.