Patent US4272294A successfully refreshed from Google Patents.
US4272294A
Expired / Lapsed
US
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Alkali resistant glass article and method of preparation
Assignee: Johns Manville Corp
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Filing: 1979-09-20
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Granted: 1981-06-09
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Expires: 1999-09-20
Abstract
Abstract A glass fiber article having enhanced alkali resistance is described. The glass fiber has thereon a coating comprising zinc stearate and a film forming polymer with the coating being present in an amount of 1 to 60% by weight of solids based on weight of the glass fiber. The polymer is preferably initially in the form of a latex and is selected from the group consisting of acrylic terpolymers, vinyl acetate/ethylene copolymers, vinyl acetate/vinyl chloride/ethylene terpolymers, urethane polymers and epoxy polymers. The glass fiber is used at a rate of approximately 5% to 20% as reinforcing fiber in Portland cement and other alkaline cementitious composites. Such composites are also described, as is a method of imparting alkali resistance to glass fiber by applying such coating to the fiber.
Inventors
- 👤 Karlis L. Jaunarajs
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 10:16
CPC Classifications
C; C03; C03C; C03C25/00; C03C25/10; C03C25/1025; C03C25/103; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2913; Y10T428/2933; Y10T428/294; Y10T428/2958; Y10T428/2964
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
43 words
A glass fiber article having enhanced alkali resistance which comprises glass fiber having thereon a coating comprising zinc stearate and a film forming polymer, said coating being present as 1 to 60% by weight of solids based on the weight of glass fiber.
Claim 2
Dependent Claim
43 words
A glass fiber article having enhanced alkali resistance which comprises glass fiber having thereon a coating comprising zinc stearate and a film forming polymer, said coating being present as 1 to 60% by weight of solids based on the weight of glass fiber.
Claim 3
Dependent Claim
26 words
An article as in claim 1 wherein said coating is present as 3 to 25% by weight of solids based on the weight of glass fiber.
Claim 4
Dependent Claim
32 words
An article as in claim 1 wherein said film forming polymer is selected from the group consisting of acrylic terpolymers, vinyl acetate/ethylene copolymers, vinyl acetate/vinyl chloride/ethylene terpolymers, urethane polymers and epoxy polymers.
Claim 5
Dependent Claim
32 words
An article as in claim 2 wherein said film forming polymer is selected from the group consisting of acrylic terpolymers, vinyl acetate/ethylene copolymers, vinyl acetate/vinyl chloride/ethylene terpolymers, urethane polymers and epoxy polymers.
Claim 6
Dependent Claim
30 words
An article as in claims 1, 2, 3 or 4 wherein said zinc stearate comprises 10% to 80% by weight of the coating solids and the remainder is the polymer.
Claim 7
Dependent Claim
27 words
An article as in claim 5 wherein said zinc stearate comprises 15% to 60% by weight of the coating solids and the remainder is the polymer solids.
Claim 8
Dependent Claim
17 words
An article as in claims 1, 2, 3 or 4 wherein said polymer is an acrylic terpolymer.
Claim 9
Dependent Claim
34 words
An article as in claims 1, 2, 3 or 4 wherein said polymer is initially in the form of an aqueous emulsion which is dried on the glass fiber to deposit the polymer solids.
Claim 10
Dependent Claim
24 words
An article as in claims 1, 2, 3 or 4 wherein said glass fiber is formed from a composition having relatively low alkali resistance.
Claim 11
Dependent Claim
17 words
An article as in claim 9 wherein said glass fiber is formed from an "E glass" composition.
Claim 12
Dependent Claim
24 words
An article as in claims 1, 2, 3 or 4 wherein said glass fiber is formed from a composition having relatively high alkali resistance.
Claim 13
Dependent Claim
24 words
An article as in claim 1, 2, 3 or 4 wherein said coating consists essentially of said zinc stearate and said film forming polymer.
Claim 14
Dependent Claim
24 words
A reinforced article comprising an alkaline cementitious matrix having incorporated therein a reinforcing glass fiber article as in claims 1, 2, 3 or 4.
Claim 15
Dependent Claim
35 words
A reinforced article as in claim 13 wherein said reinforcing glass article represents a glass fiber concentration in the reinforced article in the range of from 5% to 20% by weight of said reinforced article.
Claim 16
Dependent Claim
20 words
A reinforced article as in claim 14 wherein said reinforcing glass article is in the form of a non-woven mat.
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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) | 1984-06-08 | 1984-12-08 | 1985-06-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-06-08 | 1988-12-08 | 1989-06-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-06-08 | 1992-12-08 | 1993-06-09 | $7700.00 | Window Closed / Lapsed |