# US 10,246,370 B2 · Color-strikable glass containers

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- Number: US 10,246,370 B2
- Document ID: US10246370B2
- Status: Granted
- Kind: B2
- Application number: 15/639,452
- Filed: 2017-06-30
- Published: 2017-10-19
- Granted: 2019-04-02
- Earliest claimed: 2012-11-01
- Assignees: Owens-Brockway Glass Container Inc.
- Applicants: Owens-Brockway Glass Container Inc.
- Inventors: Edward Ordway; Terence K. Howse; Daniel Baker; Stephen Barton; Carol A. Click
- Web page: https://patentgrep.com/patent/US10246370B2

## CPC

- C03C 4/02: for coloured glass
- C03B 32/00: 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}
- C03C 3/078: containing an oxide of a divalent metal, e.g. an oxide of zinc
- C03C 3/087: containing calcium oxide, e.g. common sheet or container glass
- C03C 4/04: for photosensitive glass
- C09C 1/0009: {Pigments for ceramics (C09C1/0015, C09C1/0078 take precedence)}
- C03B 9/13: in gob feeder machines (C03B9/28, C03B9/29 take precedence)
- Y10T 428/131: Glass, ceramic, or sintered, fused, fired, or calcined metal oxide or metal carbide containing [e.g., porcelain, brick, cement, etc.]
- C03C: CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03B: MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C09C: TREATMENT OF INORGANIC MATERIALS, OTHER THAN FIBROUS FILLERS, TO ENHANCE THEIR PIGMENTING OR FILLING PROPERTIES (treatment of materials specially adapted to enhance their filling properties in mortars, concrete or artificial stone C04B14/00, C04B18/00, C04B20/00); PREPARATION OF CARBON BLACK {; PREPARATION OF INORGANIC MATERIALS WHICH ARE NO SINGLE CHEMICAL COMPOUNDS AND WHICH ARE MAINLY USED AS PIGMENTS OR FILLERS}
- Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION

## 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.

## Claims

### Claim 1

A method of making glass containers, the method including the steps of:
preparing a soda-lime-silica glass composition including: 60-75 wt. % SiO2, 7-15 wt. % Na2O, 6-12 wt. % CaO, 0.1-3.0 wt. % Al2O3, 0.0-2.0 wt. % MgO, 0.0-2.0 wt. % K2O, 0.01-0.25 wt. % SO3, and at least one colorant selected from the group consisting of: iron oxide (Fe2O3), cobalt oxide (CoO), and chromium oxide (Cr2O3), wherein the molten glass comprises 0.2-0.6 wt. % iron oxide (Fe2O3) when the at least one colorant comprises iron oxide (Fe2O3);
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 (Cu2O), 0.06-0.5 wt. % stannous oxide (SnO), 0.0125-0.05 wt. % bismuth oxide (Bi2O3), 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.

### Claim 2 (depends on 1)

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.

### Claim 3 (depends on 1)

The method set forth in claim 1 wherein the soda-lime-silica glass composition includes 0.2-0.3 wt. % Fe2O3, 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.

### Claim 4 (depends on 1)

The method set forth in claim 1 wherein the soda-lime-silica glass composition includes 0.2-0.6 wt. % Fe2O3, 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.

### Claim 5 (depends on 1)

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.

### Claim 6 (depends on 1)

The method set forth in claim 1 wherein the soda-lime-silica glass composition includes 0.01-0.4 wt. % Cr2O3, 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.

### Claim 7

A method of making glass containers, the method including:
(a) providing a mixture of latent colorant materials including cuprous oxide (Cu2O), stannous oxide (SnO), bismuth oxide (Bi2O3), 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 (Fe2O3), cobalt oxide (CoO), and chromium oxide (Cr2O3), wherein the molten glass comprises 0.2-0.6 wt. % iron oxide (Fe2O3) when the at least one colorant comprises iron oxide (Fe2O3);
(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.

### Claim 8 (depends on 7)

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.

### Claim 9 (depends on 7)

The method set forth in claim 7 wherein the color-strikable glass composition includes 0.2-0.3 wt. % Fe2O3, 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.

### Claim 10 (depends on 7)

The method set forth in claim 7 wherein the color-strikable glass composition includes 0.2-0.6 wt. % Fe2O3, 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.

### Claim 11 (depends on 7)

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.

### Claim 12 (depends on 7)

The method set forth in claim 7 wherein the color-strikable glass composition includes 0.01-0.4 wt. % Cr2O3, 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.