US3883359A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Refractory insulating compositions
Assignee: Unifrax I LLC
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Filing: 1974-02-15
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Granted: 1975-05-13
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Expires: 1994-02-15
Abstract
Abstract A pumpable refractory insulating composition comprises an aqueous slurry of a hydraulic setting cement, refractory aggregate or refractory fiber material, and lesser amounts of a particulate synthetic organic polymer and a surface active agent. The addition of the organic polymer enables the satisfactory use of thicker mixtures in pumping equipment, resulting in more even coatings of refractory insulation which have lower densities, greater resistance to thermal shock, and reduced shrinkage during drying and firing.
Inventors
- 👤 Barry J Harvey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 18:59
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/66; C04B28/00; C04B28/02; C04B2111/00; C04B2111/00034; C04B2111/00146; C04B2111/20; C04B2111/28
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
63 words
A PUMPABLE REFRACTORY INSULATING COMPOSITION COMPRISING FROM ABOUT 20 TO ABOUT 50 PERCENT OF HYDRAULIC SETTING CEMENT, FROM ABOUT 10 TO ABOUT 25 PERCENT OF FINELY DIVIDED REFRACTORY MATERIAL, FROM ABOUT 1 TO ABOUT 5 PERCENT OF A PARTICULATE SYNTHETIC ORGANIC POLYMER, FROM ABOUT 0.15 TO ABOUT 0.3 PERCENT OF A SURFACE ACTIVE AGENT, AND FROM ABOUT 20 TO ABOUT 70 PERCENT WATER.
Claim 2
Dependent Claim
63 words
A PUMPABLE REFRACTORY INSULATING COMPOSITION COMPRISING FROM ABOUT 20 TO ABOUT 50 PERCENT OF HYDRAULIC SETTING CEMENT, FROM ABOUT 10 TO ABOUT 25 PERCENT OF FINELY DIVIDED REFRACTORY MATERIAL, FROM ABOUT 1 TO ABOUT 5 PERCENT OF A PARTICULATE SYNTHETIC ORGANIC POLYMER, FROM ABOUT 0.15 TO ABOUT 0.3 PERCENT OF A SURFACE ACTIVE AGENT, AND FROM ABOUT 20 TO ABOUT 70 PERCENT WATER.
Claim 3
Dependent Claim
66 words
A pumpable insulating composition according to claim 1 comprising from about 25 to about 40 percent of hydraulic setting cement, from about 12 to about 20 percent of finely divided refractory material, from about 1.5 to about 2.5 percent of a particulate synthetic organic polymer, from about 0.1 to about 0.15 percent of a surface active agent, and from about 35 to about 65 percent water.
Claim 4
Dependent Claim
66 words
A pumpable insulating composition according to claim 2 comprising from about 30 to about 35 percent of hydraulic setting cement, from about 14 to about 18 percent of finely divided refractory material, from about 1.7 to about 2 percent of a particulate synthetic organic polymer, from about 0.1 to about 0.15 percent of a surface active agent, and from about 50 to about 60 percent water.
Claim 5
Dependent Claim
31 words
A pumpable insulating composition according to claim 1 in which the particulate synthetic organic polymer is selected from the group of polymeric materials consisting of polystyrene, polyamides, polyethylenes, polypropylenes and polyurethanes.
Claim 6
Dependent Claim
28 words
A pumpable insulating composition according to claim 1 in which the hydraulic setting cement is a calcium aluminate cement, and the particulate synthetic organic polymer comprises polystyrene beads.
Claim 7
Dependent Claim
29 words
A pumpable insulating composition according to claim 1 in which the finely divided refractory material comprises material selected from the group consisting of refractory fibers and particulate refractory material.
Claim 8
Dependent Claim
16 words
A pumpable insulating composition according to claim 6 in which the refractory fibers are aluminum silicate.
Claim 9
Dependent Claim
21 words
A pumpable insulating composition according to claim 1 in which the composition includes up to about 4 percent of colloidal silica.
References Cited (Backward Citations)
US3021291A
Cited
US3023116A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-05-12 | 1978-11-11 | 1979-05-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-05-12 | 1982-11-11 | 1983-05-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-05-12 | 1986-11-11 | 1987-05-13 | $7700.00 | Window Closed / Lapsed |