US4289536A
Expired / Lapsed
US
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Glass fiber reinforced cements and process for manufacture of same
Assignee: Owens Corning Fiberglas Technology Inc
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Filing: 1980-03-19
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Granted: 1981-09-15
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Expires: 2000-03-19
Abstract
Abstract A process and composition for use in the manufacture of fiber-reinforced cementitious products. In the preferred practice of the invention, glass fibers are coated with a size composition containing a finely divided inorganic material having a high surface area and a polyelectrolyte, and the resulting coated glass fibers are then laid down, along with a cement composition formulated to contain cement, the inorganic material and the polyelectrolyte, whereby water is removed from the cement composition to form a glass fiber reinforced cementitious product arranging to the Matschek or Magniani process.
Inventors
- 👤 Ernst Dereser
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 21:54
CPC Classifications
C; C03; C03C; C03C25/00; C03C25/10; C03C25/1025; C04; C04B; C04B14/00; C04B14/38; C04B14/42; C04B14/44; C04B28/00; C04B28/02
Claims Analysis
Total Claims: 30
Claim 1
Independent Claim
61 words
A fiber reinforced cementitious product comprising a cement as a continuous phase and fibers dispersed as reinforcement in the continuous phase, with said product including flocculating agent and a finely divided inorganic material having a surface area greater than 20 m 2 /g present in (a) admixture with the cement, (b) as a size coating on the fibers or (c) both.
Claim 2
Dependent Claim
61 words
A fiber reinforced cementitious product comprising a cement as a continuous phase and fibers dispersed as reinforcement in the continuous phase, with said product including flocculating agent and a finely divided inorganic material having a surface area greater than 20 m 2 /g present in (a) admixture with the cement, (b) as a size coating on the fibers or (c) both.
Claim 3
Dependent Claim
13 words
A product as defined in claim 1 wherein the fibers are glass fibers.
Claim 4
Dependent Claim
26 words
A product as defined in claim 1 wherein the inorganic material is selected from the group consisting of a silica, a bentonite and a diatomaceous earth.
Claim 5
Dependent Claim
28 words
A product as defined in claim 1 wherein the glass fibers are present in an amount up to 30% by weight based on the weight of the cement.
Claim 6
Dependent Claim
13 words
A product as defined in claim 1 wherein the inorganic material is bentonite.
Claim 7
Dependent Claim
23 words
A product as defined in claim 1 wherein the flocculating agent and the inorganic material are present as size coating on the fibers.
Claim 8
Dependent Claim
15 words
A product as defined in claim 6 wherein the size coating also includes a lubricant.
Claim 9
Dependent Claim
16 words
A product as defined in claim 6 wherein the size coating also includes a film-forming resin.
Claim 10
Dependent Claim
31 words
A product as defined in claim 1 wherein the inorganic material and the flocculating agent are present both in admixture with the cement and as a size coating on the fibers.
Claim 11
Dependent Claim
71 words
A glass fiber reinforced cementitious product comprising a cement as a continuous phase and glass fibers dispersed in the cement as reinforcement therefor, said cement being formulated to include a flocculating agent and a finely divided inorganic siliceous material having a surface area greater than 20 m 2 /g, with the glass fibers having a size coating on the surfaces thereof, said coating comprising said flocculating agent and said inorganic material.
Claim 12
Dependent Claim
71 words
A glass fiber reinforced cementitious product comprising a cement as a continuous phase and glass fibers dispersed in the cement as reinforcement therefor, said cement being formulated to include a flocculating agent and a finely divided inorganic siliceous material having a surface area greater than 20 m 2 /g, with the glass fibers having a size coating on the surfaces thereof, said coating comprising said flocculating agent and said inorganic material.
Claim 13
Dependent Claim
13 words
A product as defined in claim 10 wherein the inorganic material is bentonite.
Claim 14
Dependent Claim
16 words
A product as defined in claim 10 wherein the size coating also includes a film-forming resin.
Claim 15
Dependent Claim
78 words
In a process for the manufacture of fiber reinforced cementitious products wherein fibers are mixed with a cementitious material to form a pulp, the pulp is contacted with a foraminous forming member from which water is withdrawn to form a green product and the green product is cured, the improvement comprising using a pulp in which one of the cementitious material and the glass fibers contains polyelectrolytes and a finely divided inorganic material having a high surface area.
Claim 16
Dependent Claim
78 words
In a process for the manufacture of fiber reinforced cementitious products wherein fibers are mixed with a cementitious material to form a pulp, the pulp is contacted with a foraminous forming member from which water is withdrawn to form a green product and the green product is cured, the improvement comprising using a pulp in which one of the cementitious material and the glass fibers contains polyelectrolytes and a finely divided inorganic material having a high surface area.
Claim 17
Dependent Claim
13 words
A process as defined in claim 13 wherein the fibers are glass fibers.
Claim 18
Dependent Claim
31 words
A process as defined in claim 13 wherein the polyelectrolyte and the inorganic material are present both in admixture with the cementitious material and as a size coating on the fibers.
Claim 19
Dependent Claim
94 words
In a process for the manufacture of glass fiber-reinforced cementitious products wherein glass fibers are mixed with a cementitious material to form a pulp, the pulp is contacted with a foraminous forming member from which water is withdrawn to form a green product and the green product is cured, the improvement comprising mixing glass fibers having a size coating thereon, said coating containing a polyelectrolyte and a finely divided inorganic siliceous material having a surface area greater than 20 m 2 /g, with a cement composition containing cement, said polyelectrolyte and said inorganic material.
Claim 20
Dependent Claim
94 words
In a process for the manufacture of glass fiber-reinforced cementitious products wherein glass fibers are mixed with a cementitious material to form a pulp, the pulp is contacted with a foraminous forming member from which water is withdrawn to form a green product and the green product is cured, the improvement comprising mixing glass fibers having a size coating thereon, said coating containing a polyelectrolyte and a finely divided inorganic siliceous material having a surface area greater than 20 m 2 /g, with a cement composition containing cement, said polyelectrolyte and said inorganic material.
Claim 21
Dependent Claim
23 words
A process as defined in claim 16 wherein the polyelectrolyte is selected from the group consisting of surfactants, wetting agents, and flocculating agents.
Claim 22
Dependent Claim
14 words
A process as defined in claim 16 wherein the inorganic material is a bentonite.
Claim 23
Dependent Claim
16 words
A process as defined in claim 16 wherein the size coating also includes a film-forming resin.
Claim 24
Dependent Claim
25 words
A product as defined in claim 1 wherein the finely divided inorganic material has a surface area ranging from 75 to 500 m 2 /g.
Claim 25
Dependent Claim
15 words
A product as defined in claim 1 wherein said fibers are alkali resistant glass fibers.
Claim 26
Dependent Claim
39 words
A product as defined in claim 6 wherein the inorganic material is present on the fibers in an amount within the range of 10-75% and the polyelectrolyte is present in an amount within the range of 1-25% by weight.
Claim 27
Dependent Claim
27 words
A product as defined in claim 1 wherein the inorganic material present in the cement constitutes from 5-50% by weight based upon the weight of the cement.
Claim 28
Dependent Claim
17 words
A product as defined in claim 1 wherein the fibers are composed of fibers and asbestos fibers.
Claim 29
Dependent Claim
15 words
A process as defined in claim 13 wherein the fibers are alkali resistant glass fibers.
Claim 30
Dependent Claim
26 words
A product as claimed in claim 1 wherein the product also includes a member selected from the group consisting of a surfactant and a wetting agent.
References Cited (Backward Citations)
US3062670A
Cited
US4090884A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-09-14 | 1985-03-16 | 1985-09-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-09-14 | 1989-03-16 | 1989-09-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-09-14 | 1993-03-16 | 1993-09-15 | $7700.00 | Window Closed / Lapsed |