US4554258A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Chemical resistant lead-free glass frit compositions
Assignee: Libbey Glass Inc
•
Filing: 1984-06-28
•
Granted: 1985-11-19
•
Expires: 2004-06-28
Abstract
Abstract Glass frit compositions for use in glazes or enamels have a fiber softening point of 535° C. or more and are free of cadmium, lead and arsenic and consist essentially of Bi 2 O 3 --B 2 O 3 --SiO 2 with R 2 O being 2-8% and RO being 0-9% by weight.
Inventors
- 👤 Josef Francel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 11:32
CPC Classifications
C; C03; C03C; C03C3/00; C03C3/04; C03C3/062; C03C3/064; C03C3/068; C03C8/00; C03C8/02
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
157 words
A glass frit composition that is free of lead, cadmium and arsenic, the composition having a fiber softening point of at least about 535° C., the composition having good chemical resistance and consisting essentially of the following components in parts by weight per 100: ______________________________________
COMPONENT PARTS
______________________________________
Bi.sub.2 O.sub.3
48-57
SiO.sub.2 29-38
B.sub.2 O.sub.3 3-8
R.sub.2 O 2-8
TiO.sub.2 0-2
ZrO.sub.2 0-8
Al.sub.2 O.sub.3
0-2
BaO 0-4
ZnO 0-3
CaO 0-9
______________________________________ wherein RO is 0-about 9, R 2 O 3 is about 57-64, and RO 2 is about 32-39, the alkali resistance in weight % loss being below about 0.9, measured using 9% sodium pyrophosphate at 60° C. for 8 hours, and the acid resistance in weight % loss being below about 0.9, measured using 4% by weight acetic acid for 24 hours at room temperature, RO being at least one of BaO, CaO or ZnO, and R 2 O being an alkali metal oxide.
Claim 2
Dependent Claim
157 words
A glass frit composition that is free of lead, cadmium and arsenic, the composition having a fiber softening point of at least about 535° C., the composition having good chemical resistance and consisting essentially of the following components in parts by weight per 100: ______________________________________
COMPONENT PARTS
______________________________________
Bi.sub.2 O.sub.3
48-57
SiO.sub.2 29-38
B.sub.2 O.sub.3 3-8
R.sub.2 O 2-8
TiO.sub.2 0-2
ZrO.sub.2 0-8
Al.sub.2 O.sub.3
0-2
BaO 0-4
ZnO 0-3
CaO 0-9
______________________________________ wherein RO is 0-about 9, R 2 O 3 is about 57-64, and RO 2 is about 32-39, the alkali resistance in weight % loss being below about 0.9, measured using 9% sodium pyrophosphate at 60° C. for 8 hours, and the acid resistance in weight % loss being below about 0.9, measured using 4% by weight acetic acid for 24 hours at room temperature, RO being at least one of BaO, CaO or ZnO, and R 2 O being an alkali metal oxide.
Claim 3
Dependent Claim
67 words
A composition as defined in claim 1 in which the composition is as follows: ______________________________________
COMPONENTS PARTS
______________________________________
Bi.sub.2 O.sub.3 50
SiO.sub.2 29
TiO.sub.2 2
ZrO.sub.2 3
B.sub.2 O.sub.3 5
Al.sub.2 O.sub.3 2
BaO 4
ZnO 3
CaO 0
Li.sub.2 O 2
K.sub.2 O 0
Na.sub.2 O 0
R.sub.2 O 2
RO 7
R.sub.2 O.sub.3 57
RO.sub.2 34
Weight % Losses
Alkalies 0.3
Acid 0.5 .
______________________________________
Claim 4
Dependent Claim
67 words
A composition as defined in claim 1 in which the composition is as follows: ______________________________________
COMPONENTS PARTS
______________________________________
Bi.sub.2 O.sub.3 57
SiO.sub.2 29
TiO.sub.2 2
ZrO.sub.2 3
B.sub.2 O.sub.3 5
Al.sub.2 O.sub.3 2
BaO 0
ZnO 0
CaO 0
Li.sub.2 O 0
K.sub.2 O 2
Na.sub.2 O 0
R.sub.2 O 2
RO 0
R.sub.2 O.sub.3 64
RO.sub.2 34
Weight % Losses
Alkalies 0.23
Acid 0.60 .
______________________________________
Claim 5
Dependent Claim
67 words
A composition as defined in claim 1 in which the composition is as follows: ______________________________________
COMPONENTS PARTS
______________________________________
Bi.sub.2 O.sub.3 56
SiO.sub.2 34
TiO.sub.2 2
ZrO.sub.2 0
B.sub.2 O.sub.3 3
Al.sub.2 O.sub.3 0
BaO 0
ZnO 0
CaO 0
Li.sub.2 O 0
K.sub.2 O 2
Na.sub.2 O 3
R.sub.2 O 5
RO 0
R.sub.2 O.sub.3 59
RO.sub.2 36
Weight % Losses
Alkalies 0.23
Acid 0.60 .
______________________________________
Claim 6
Dependent Claim
68 words
A composition as defined in claim 1 in which the composition is as follows: ______________________________________
COMPONENTS PARTS
______________________________________
Bi.sub.2 O.sub.3 50
SiO.sub. 2 29
TiO.sub.2 0
ZrO.sub.2 3
B.sub.2 O.sub.3 5
Al.sub.2 O.sub.3 2
BaO 0
ZnO 0
CaO 9
Li.sub.2 O 2
K.sub.2 O 0
Na.sub.2 O 0
R.sub.2 O 2
RO 9
R.sub.2 O.sub.3 57
RO.sub.2 32
Weights % Losses
Alkalies 0.00
Acid 0.34 .
______________________________________
Claim 7
Dependent Claim
67 words
A composition as defined in claim 1 in which the composition is as follows: ______________________________________
COMPONENTS PARTS
______________________________________
Bi.sub.2 O.sub.3 50
SiO.sub.2 29
TiO.sub.2 2
ZrO.sub.2 3
B.sub.2 O.sub.3 5
Al.sub.2 O.sub.3 2
BaO 0
ZnO 0
CaO 7
Li.sub.2 O 2
K.sub.2 O 0
Na.sub.2 O 0
R.sub.2 O 2
RO 7
R.sub.2 O.sub.3 57
RO.sub.2 34
Weight % Losses
Alkalies 0.60
Acid 0.43 .
______________________________________
Claim 8
Dependent Claim
67 words
A composition as defined in claim 1 in which the composition is as follows: ______________________________________
COMPONENTS PARTS
______________________________________
Bi.sub.2 O.sub.3 50
SiO.sub.2 32
B.sub.2 O.sub.3 7
Li.sub.2 O 0
Na.sub.2 O 5
K.sub.2 O 0
R.sub.2 O 5
TiO.sub.2 0
ZrO.sub.2 5
Al.sub.2 O.sub.3 0
BaO 0
ZnO 0
CaO 1
F 0
R.sub.2 O.sub.3 57
RO.sub.2 37
Weight % Losses
Alkalies 0.45
Acid 0.87 .
______________________________________
Claim 9
Dependent Claim
67 words
A composition as defined in claim 1 in which the composition is as follows: ______________________________________
COMPONENTS PARTS
______________________________________
Bi.sub.2 O.sub.3 50
SiO.sub.2 37
B.sub.2 O.sub.3 8
Li.sub.2 O 0
Na.sub.2 O 5
K.sub.2 O 0
R.sub.2 O 5
TiO.sub.2 0
ZrO.sub.2 0
Al.sub.2 O.sub.3 0
BaO 0
ZnO 0
CaO 0
F 0
R.sub.2 O.sub.3 58
RO.sub.2 37
Weight % Losses
Alkalies 0.00
Acid 0.00 .
______________________________________
Claim 10
Dependent Claim
67 words
A composition as defined in claim 1 in which the composition is as follows: ______________________________________
COMPONENTS PARTS
______________________________________
Bi.sub.2 O.sub.3 51
SiO.sub.2 31
B.sub.2 O.sub.3 7
Li.sub.2 O 0
Na.sub.2 O 5
K.sub.2 O 0
R.sub.2 O 5
TiO.sub.2 0
ZrO.sub.2 6
Al.sub.2 O.sub.3 0
BaO 0
ZnO 0
CaO 0
F 0
R.sub.2 O.sub.3 58
RO.sub.2 37
Weight % Losses
Alkalies +0.45
Acid +0.42 .
______________________________________
Claim 11
Dependent Claim
67 words
A composition as defined in claim 1 in which the composition is as follows: ______________________________________
COMPONENTS PARTS
______________________________________
Bi.sub.2 O.sub.3 50
SiO.sub.2 31
B.sub.2 O.sub.3 7
Li.sub.2 O 0
Na.sub.2 O 5
K.sub.2 O 0
R.sub.2 O 5
TiO.sub.2 0
ZrO.sub.2 6
Al.sub.2 O.sub.3 0
BaO 0
ZnO 0
CaO 0
F 0
R.sub.2 O.sub.3 57
RO.sub.2 37
Weight % Losses
Alkalies +0.29
Acid +0.26 .
______________________________________
Claim 12
Dependent Claim
67 words
A composition as defined in claim 1 in which the composition is as follows: ______________________________________
COMPONENTS PARTS
______________________________________
Bi.sub.2 O.sub.3 48
SiO.sub.2 31
B.sub.2 O.sub.3 8
Li.sub.2 O 0
Na.sub.2 O 5
K.sub.2 O 0
R.sub.2 O 5
TiO.sub.2 0
ZrO.sub.2 8
Al.sub.2 O.sub.3 0
BaO 0
ZnO 0
CaO 0
F 0
R.sub.2 O.sub.3 56
RO.sub.2 39
Weight % Losses
Alkalies 0.61
Acid 0.64 .
______________________________________
Claim 13
Dependent Claim
143 words
A glass frit composition that is free of lead, cadmium and arsenic, the composition having a fiber softening point of at least about 535° C., the composition having excellent chemical resistance and consisting essentially of the following components in approximate parts by weight per 100: ______________________________________
COMPONENTS PARTS
______________________________________
Bi.sub.2 O.sub.3 50-56
SiO.sub.2 30-34
B.sub.2 O.sub.3 4-5
R.sub.2 O 2-5
TiO.sub.2 0-2
ZrO.sub.2 0-3
Al.sub.2 O.sub.3 0-2
RO 0-7
F 0-1/2
R.sub.2 O.sub.3 58-62
RO.sub.2 32-37,
______________________________________ the alkali resistance in weight % loss no more than about 0.8, measured using 9% sodium pyrophosphate at 60°C. for 8 hours, and the acid resistance in weight % loss being no more than about 0.75, measured using 4% by weight acetic acid for 24 hours at room temperature, at least one of BaO, CaO or ZnO, and R 2 O being an alkali metal oxide.
Claim 14
Dependent Claim
143 words
A glass frit composition that is free of lead, cadmium and arsenic, the composition having a fiber softening point of at least about 535° C., the composition having excellent chemical resistance and consisting essentially of the following components in approximate parts by weight per 100: ______________________________________
COMPONENTS PARTS
______________________________________
Bi.sub.2 O.sub.3 50-56
SiO.sub.2 30-34
B.sub.2 O.sub.3 4-5
R.sub.2 O 2-5
TiO.sub.2 0-2
ZrO.sub.2 0-3
Al.sub.2 O.sub.3 0-2
RO 0-7
F 0-1/2
R.sub.2 O.sub.3 58-62
RO.sub.2 32-37,
______________________________________ the alkali resistance in weight % loss no more than about 0.8, measured using 9% sodium pyrophosphate at 60°C. for 8 hours, and the acid resistance in weight % loss being no more than about 0.75, measured using 4% by weight acetic acid for 24 hours at room temperature, at least one of BaO, CaO or ZnO, and R 2 O being an alkali metal oxide.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-11-18 | 1989-05-20 | 1989-11-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-11-18 | 1993-05-20 | 1993-11-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-11-18 | 1997-05-20 | 1997-11-19 | $7700.00 | Window Closed / Lapsed |