Color-strikable glass containers

Patent metadata

Field	Value
Publication number	US-10246370-B2
Application number	US-201715639452-A
Country	US
Kind code	B2
Filing date	Jun 30, 2017
Priority date	Nov 1, 2012
Publication date	Apr 2, 2019
Grant date	Apr 2, 2019

Abstract

Latent colorant material compositions, soda-lime-silica glass compositions, and related methods of manufacturing color-strikable glass containers. The latent colorant material compositions may be introduced into a plurality of base glass compositions having redox numbers in the range of −40 to +20 to produce color-strikable glass compositions and color-strikable glass containers. The latent colorant material compositions introduced into the base glass compositions include a mixture of cuprous oxide (Cu2O), stannous oxide (SnO), bismuth oxide (Bi2O3), and carbon (C). After formation, the color-strikable glass containers may be heat-treated to strike red or black therein.

First claim

The invention claimed is:

1. A method of making glass containers, the method including the steps of:
preparing a soda-lime-silica glass composition including: 60-75 wt. % SiO 2 , 7-15 wt. % Na 2 O, 6-12 wt. % CaO, 0.1-3.0 wt. % Al 2 O 3 , 0.0-2.0 wt. % MgO, 0.0-2.0 wt. % K 2 O, 0.01-0.25 wt. % SO 3 , and at least one colorant selected from the group consisting of: iron oxide (Fe 2 O 3 ), cobalt oxide (CoO), and chromium oxide (Cr 2 O 3 ), wherein the molten glass comprises 0.2-0.6 wt. % iron oxide (Fe 2 O 3 ) when the at least one colorant comprises iron oxide (Fe 2 O 3 );
mixing a latent colorant material composition into the soda-lime-silica glass composition to produce a color-strikable glass composition including: 0.0875-0.35 wt. % cuprous oxide (Cu 2 O), 0.06-0.5 wt. % stannous oxide (SnO), 0.0125-0.05 wt. % bismuth oxide (Bi 2 O 3 ), and 0.02-0.10 wt. % carbon (C);
forming glass containers from the color-strikable glass composition;
annealing the glass containers; and
raising the temperature of a first one of the glass containers above a highest annealing temperature to impart red or black coloration thereto to produce a red or black glass container,
wherein a second one of the glass containers is not heated to a temperature above the highest annealing temperature, and wherein the second one of the glass containers exhibits arctic blue, amber, cobalt blue, or emerald green coloration.

2. The method set forth in claim 1 wherein the temperature of the first one of the glass containers is raised above 600 degrees Celsius to strike red or black coloration therein and the temperature of the second one of the glass containers is maintained at a temperature below 600 degrees Celsius.

3. The method set forth in claim 1 wherein the soda-lime-silica glass composition includes 0.2-0.3 wt. % Fe 2 O 3 , the temperature of the first one of the glass containers is raised above the highest annealing temperature to produce a red glass container, and the second one of the glass containers exhibits arctic blue coloration.

4. The method set forth in claim 1 wherein the soda-lime-silica glass composition includes 0.2-0.6 wt. % Fe 2 O 3 , the temperature of the first one of the glass containers is raised above the highest annealing temperature to produce a black glass container, and the second one of the glass containers exhibits amber coloration.

5. The method set forth in claim 1 wherein the soda-lime-silica glass composition includes 0.01-0.15 wt. % CoO, the temperature of the first one of the glass containers is raised above the highest annealing temperature to produce a black glass container, and the second one of the glass containers exhibits cobalt blue coloration.

6. The method set forth in claim 1 wherein the soda-lime-silica glass composition includes 0.01-0.4 wt. % Cr 2 O 3 , the temperature of the first one of the glass containers is raised above the highest annealing temperature to produce a black glass container, and the second one of the glass containers exhibits emerald green coloration.

7. A method of making glass containers, the method including:
(a) providing a mixture of latent colorant materials including cuprous oxide (Cu 2 O), stannous oxide (SnO), bismuth oxide (Bi 2 O 3 ), and carbon (C);
(b) mixing the mixture of latent colorant materials with soda-lime-silica glass precursor materials to produce a batch of raw materials, wherein the soda-lime-silica glass precursor materials include at least one colorant selected from the group consisting of iron oxide, cobalt oxide, and chromium oxide;
(c) melting the batch of raw materials in a glass batch furnace to produce molten glass having a color-strikable glass composition that includes at least one colorant selected from the group consisting of: iron oxide (Fe 2 O 3 ), cobalt oxide (CoO), and chromium oxide (Cr 2 O 3 ), wherein the molten glass comprises 0.2-0.6 wt. % iron oxide (Fe 2 O 3 ) when the at least one colorant comprises iron oxide (Fe 2 O 3 );
(d) forming glass containers from the molten glass;
(e) annealing the glass containers; and
(f) raising the temperature of a first one of the glass containers above a highest annealing temperature to impart red or black coloration thereto to produce a red or black glass container,
wherein a second one of the glass containers is not heated to a temperature above the highest annealing temperature, and wherein the second one of the glass containers exhibits arctic blue, amber, cobalt blue, or emerald green coloration.

8. The method set forth in claim 7 wherein the temperature of the first one of the glass containers is raised above 600 degrees Celsius to strike red or black coloration therein, and wherein the temperature of the second one of the glass containers is maintained at a temperature below 600 degrees Celsius.

9. The method set forth in claim 7 wherein the color-strikable glass composition includes 0.2-0.3 wt. % Fe 2 O 3 , the temperature of the first one of the glass containers is raised above the highest annealing temperature to produce a red glass container, and the second one of the glass containers exhibits arctic blue coloration.

10. The method set forth in claim 7 wherein the color-strikable glass composition includes 0.2-0.6 wt. % Fe 2 O 3 , the temperature of the first one of the glass containers is raised above the highest annealing temperature to produce a black glass container, and the second one of the glass containers exhibits amber coloration.

11. The method set forth in claim 7 wherein the color-strikable glass composition includes 0.01-0.15 wt. % CoO, the temperature of the first one of the glass containers is raised above the highest annealing temperature to produce a black glass container, and the second one of the glass containers exhibits cobalt blue coloration.

12. The method set forth in claim 7 wherein the color-strikable glass composition includes 0.01-0.4 wt. % Cr 2 O 3 , the temperature of the first one of the glass containers is raised above the highest annealing temperature to produce a black glass container, and the second one of the glass containers exhibits emerald green coloration.

Assignees

• Owens Brockway Glass Container

Inventors

• Ordway Edward
• Howse Terence K
• Baker Daniel
• Barton Stephen
• Click Carol A

Classifications

• Y10T428/131

  Glass, ceramic, or sintered, fused, fired, or calcined metal oxide or metal carbide containing [e.g., porcelain, brick, cement, etc.] · CPC title

• C03C3/087

  containing calcium oxide, e.g. common sheet or container glass · CPC title

• C03C4/04

  for photosensitive glass · CPC title

• C03B32/00

  Thermal after-treatment of glass products not provided for in groups {C03B19/00} , C03B25/00 - C03B31/00 {or C03B37/00}, e.g. crystallisation, eliminating gas inclusions or other impurities; {Hot-pressing vitrified, non-porous, shaped glass products} · CPC title

• C03C4/02 Primary

  for coloured glass · CPC title