US4652535A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Alkaline-resistant glass bodies and fibers
Assignee: Ensci Inc
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Filing: 1986-04-08
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Granted: 1987-03-24
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Expires: 2006-04-08
Abstract
Abstract The invention relates to glasses formed from modified naturally occurring zeolites and in particular to alkaline-resistant glasses containing a high calcia loading.
Inventors
- 👤 John D. Mackenzie
- 👤 Tetsuro Horiuchi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 03:54
CPC Classifications
C; C03; C03C; C03C1/00
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
70 words
A glass-forming composition having high alkali resistance when formed in a glass body, said glass-forming composition comprising: naturally occurring pre-reacted zeolite in sufficient quantity to provide a signifcant portion of the glass-forming ingredients admixed with a significant quantity of an alakline earth metal containing material so that said resulting glass body contains about 20% to about 60% by weight of alkaline earth metal oxide, calculated as alkaline earth metal oxide.
Claim 2
Dependent Claim
70 words
A glass-forming composition having high alkali resistance when formed in a glass body, said glass-forming composition comprising: naturally occurring pre-reacted zeolite in sufficient quantity to provide a signifcant portion of the glass-forming ingredients admixed with a significant quantity of an alakline earth metal containing material so that said resulting glass body contains about 20% to about 60% by weight of alkaline earth metal oxide, calculated as alkaline earth metal oxide.
Claim 3
Dependent Claim
36 words
The glass-forming composition of claim 1 wherein said zeolite is present as about 40% to about 70% by weight and said alkaline earth metal containing material is present from about 60% to about 30% by weight.
Claim 4
Dependent Claim
16 words
The glass-forming composition of claim 1 wherein said alkaline earth metal containing material contains calcium carbonate.
Claim 5
Dependent Claim
22 words
The glass-forming composition of claim 1 wherein said alkaline earth metal containing material contains substantial quantities of at least one magnesium compound.
Claim 6
Dependent Claim
16 words
The glass-forming composition of claim 3 wherein said calcium carbonate containing material is provided as dolomite.
Claim 7
Dependent Claim
27 words
The glass-forming composition of claim 3 wherein at least a portion of said calcium carbonate may be substituted with a compound of magnesium, barium, strontium or beryllium.
Claim 8
Independent Claim
78 words
A method of forming an alkaline-resistant glass body comprising: melting a naturally occurring pre-reacted zeolite present in sufficient quantity to provide a significant portion of the glass forming ingredients in the presence of sufficient alkaline earth metal compound at a temperature of about 1250° C. to about 1400° C. to form a glass body having an alkaline earth metal oxide content in the range of about 20% to about 60% by weight, calculated in alkaline earth metal oxide.
Claim 9
Independent Claim
78 words
A method of forming an alkaline-resistant glass body comprising: melting a naturally occurring pre-reacted zeolite present in sufficient quantity to provide a significant portion of the glass forming ingredients in the presence of sufficient alkaline earth metal compound at a temperature of about 1250° C. to about 1400° C. to form a glass body having an alkaline earth metal oxide content in the range of about 20% to about 60% by weight, calculated in alkaline earth metal oxide.
Claim 10
Dependent Claim
69 words
A glass-forming composition having high alkali resistance when formed in a glass body, said glass-forming composition comprising: naturally occurring pre-reacted zeolite present in sufficient quantity to provide a significant portion of the glass forming ingredients and at least one added alkaline earth metal component so that said resulting glass body contains about 20% to about 60% by weight of alkaline earth metal oxide, calculated as alkaline earth metal oxide.
Claim 11
Dependent Claim
69 words
A glass-forming composition having high alkali resistance when formed in a glass body, said glass-forming composition comprising: naturally occurring pre-reacted zeolite present in sufficient quantity to provide a significant portion of the glass forming ingredients and at least one added alkaline earth metal component so that said resulting glass body contains about 20% to about 60% by weight of alkaline earth metal oxide, calculated as alkaline earth metal oxide.
Claim 12
Dependent Claim
16 words
The composition of claim 8 wherein said added alkaline earth metal component is a calcium component.
Claim 13
Dependent Claim
30 words
The composition of claim 8 wherein said resulting glass body contains about 30% to about 60% by weight of silica and about 2% to about 20% by weight of alumina.
Claim 14
Dependent Claim
30 words
The composition of claim 9 wherein said resulting glass body contains about 30% to about 60% by weight of silica and about 2% to about 20% by weight of alumina.
Claim 15
Dependent Claim
46 words
The composition of claim 10 wherein said resulting glass body contains about 20% to about 60% by weight of calcia and about 0% to about 30% by weight of magnesia, provided that the amount of calcia plus magnesia is about 30% to about 60% by weight.
Claim 16
Dependent Claim
45 words
The composition of claim 11 wherein said glass composition contains about 20% to about 60% by weight of calcia and about 0% to about 30% by weight of magnesia, provided that the amount of calcia plus magnesia is about 30% to about 60% by weight.
Claim 17
Dependent Claim
19 words
The composition of claim 8 wherein said glass composition contains about 27% to about 60% by weight of calcia.
Claim 18
Dependent Claim
29 words
The composition of claim 14 wherein said glass composition contains about 30% to about 60% by weight of silica and about 13% to about 20% by weight of alumina.
Claim 19
Dependent Claim
19 words
The composition of claim 15 wherein said glass composition contains about 27% to about 35% by weight of calcia.
Claim 20
Dependent Claim
39 words
The composition of claim 8 wherein said glass composition contains about 40% to about 60% of said zeolite and about 60% to about 30% by weight of said added alkaline earth metal component, calculated as alkaline earth metal oxide.
Claim 21
Dependent Claim
14 words
The composition of claim 9 wherein said calcium component consists essentially of calcium carbonate.
Claim 22
Dependent Claim
21 words
The composition of claim 8 wherein said added alkaline earth metal component comprises a mixture of calcium component and magnesium component.
Claim 23
Dependent Claim
13 words
The composition of claim 8 wherein said alkaline earth metal component is dolomite.
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