Patent US3404091A successfully refreshed from Google Patents.
US4013478A
Expired / Lapsed
US
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Process for increasing resistance of glass products to cement and cementitious mixtures thereof
Assignee: Schott AG
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Filing: 1975-01-24
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Granted: 1977-03-22
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Expires: 1995-01-24
Abstract
Abstract A process is disclosed to increase the resistance of glass products to alkaline cement liquors by coating the surface of the glass products with an effective amount of a water-soluble zinc compound. Cement compositions comprising a cementitious matrix and glass products produced in accordance with the process of this invention are also disclosed herein.
Inventors
- 👤 Helmut Meyer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 22:14
CPC Classifications
C; C03; C03C; C03C25/00; C03C25/10; C03C25/1025
Claims Analysis
Total Claims: 25
Claim 1
Independent Claim
47 words
In a process for making a reinforced Portland-type cement product, the steps comprising: (a) coating glass products useful for the reinforcement of said cement with an effective amount of a water-soluble zinc salt of a weak acid; and (b) incorporating said coated glass products into said cement.
Claim 2
Dependent Claim
47 words
In a process for making a reinforced Portland-type cement product, the steps comprising: (a) coating glass products useful for the reinforcement of said cement with an effective amount of a water-soluble zinc salt of a weak acid; and (b) incorporating said coated glass products into said cement.
Claim 3
Dependent Claim
13 words
The process of claim 1, wherein said weak acid is an organic acid.
Claim 4
Dependent Claim
17 words
The process of claim 2, wherein said zinc salt is zinc formate, zinc acetate or zinc oxalate.
Claim 5
Dependent Claim
13 words
The process of claim 1, wherein said weak acid is an inorganic acid.
Claim 6
Dependent Claim
13 words
The process of claim 1, wherein said glass product is a fiberglass filament.
Claim 7
Dependent Claim
12 words
The process of claim 5, wherein said fiberglass filaments consist of E-glass.
Claim 8
Dependent Claim
44 words
The process of claim 1, which further comprises applying a sizing composition to said glass products, said composition consisting essentially of 1.5 to 4 weight percent of a film forming agent and from 0.05 to 0.2 weight percent lubricant and the remainder being water.
Claim 9
Dependent Claim
35 words
The process of claim 7, wherein said film forming agent is starch, dextrine, vinyl acetate, polyester resin or mixtures thereof, and said lubricant is vegetable oil, vegetable fat, poly fatty acid amides, or mixtures thereof.
Claim 10
Dependent Claim
22 words
The process of claim 8, wherein said sizing composition is applied to glass filaments simultaneously with the application of said zinc salt.
Claim 11
Dependent Claim
18 words
The process of claim 9, wherein the composition contains from 2 to 8 percent of said zinc salt.
Claim 12
Dependent Claim
50 words
The process of claim 10 further comprising the steps of initially extruding fiberglass filaments, applying said sizing composition and said zinc salt as a coating onto the surface of said filaments, thereafter drying said coating on the glass surfaces at a temperature of from between about 100° and 135° C.
Claim 13
Dependent Claim
26 words
The process of claim 1, which further comprises initially extruding fiberglass filaments and immediately thereafter coating the surface of said fiberglass filaments with said zinc salt.
Claim 14
Dependent Claim
24 words
The process of claim 12, which further comprises drying said coating on the glass surfaces at a temperature between about 100° and 135° C.
Claim 15
Dependent Claim
45 words
A cement composition comprising a Portland-type cementitious matrix and glass products dispersed throughout said matrix as a reinforcement therefor, said glass products having a coating consisting essentially of a water soluble zinc salt of a weak acid applied to the surfaces of said glass products.
Claim 16
Dependent Claim
45 words
A cement composition comprising a Portland-type cementitious matrix and glass products dispersed throughout said matrix as a reinforcement therefor, said glass products having a coating consisting essentially of a water soluble zinc salt of a weak acid applied to the surfaces of said glass products.
Claim 17
Dependent Claim
14 words
The cement composition of claim 14, wherein said weak acid is an organic acid.
Claim 18
Dependent Claim
18 words
The cement composition of claim 14, wherein said zinc salt is zinc formate, zinc acetate or zinc oxalate.
Claim 19
Dependent Claim
14 words
The cement composition of claim 14, wherein said weak acid is an inorganic acid.
Claim 20
Dependent Claim
14 words
The cement composition of claim 14, wherein said glass product is a fiberglass filament.
Claim 21
Dependent Claim
13 words
The cement composition of claim 18, wherein said fiberglass filaments consist of E-glass.
Claim 22
Dependent Claim
38 words
The cement composition of claim 14, which further comprises a sizing composition consisting essentially of 1.5 to 4 weight percent of a film forming agent and from 0.05 to 0.2 weight percent lubricant and the remainder being water.
Claim 23
Dependent Claim
36 words
The cement composition of claim 20, wherein said film forming agent is starch, dextrine, vinyl acetate, polyester resin or mixtures thereof, and said lubricant is vegetable oil, vegetable fat, poly fatty acid amides, or mixtures thereof.
Claim 24
Dependent Claim
19 words
The cement composition of claim 21, wherein the composition contains from 2 to 8 percent of said zinc salt.
Claim 25
Dependent Claim
28 words
The cement composition of claim 15, wherein said cementitious matrix is Portland cement and said composition contains from about 4 to 10 weight percent of said glass products.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-03-21 | 1980-09-20 | 1981-03-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-03-21 | 1984-09-20 | 1985-03-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-03-21 | 1988-09-20 | 1989-03-22 | $7700.00 | Window Closed / Lapsed |