US3903025A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for cold molding pitch bonded refractory
Assignee: General Refractories Co
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Filing: 1973-11-06
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Granted: 1975-09-02
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Expires: 1993-11-06
Abstract
Abstract A binder composition comprising pitch, an aqueous solution of a water soluble resin, and an organic solvent solution of a thermosetting polymer. The binding composition in combination with particulate refractory aggregate forms a molding composition suitable for use in making shaped refractory articles. Shaped refractory articles prepared from such a molding composition are particularly suitable for use as linings in basic oxygen process steel refining vessels. Shaped refractory articles may be prepared by coating coarse refractory aggregate with the organic solvent solution of a thermosetting polymer, admixing powdered pitch with the coated coarse refractory aggregate, blending fine refractory aggregate and the aqueous solution of the water soluble resin with the coated refractory aggregate-pitch mixture, and forming the resultant composition into shaped refractory articles.
Inventors
- 👤 Grant M Farrington
- 👤 J Donald Harris
- 👤 Alfred H Foessel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 09:47
CPC Classifications
C; C08; C08L; C08L61/00; C08L61/20; C08L61/22; C08L61/24; C04; C04B; C04B35/00; C04B35/01; C04B35/013; C08L95/00
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
79 words
A REFRACTORY MOLDING COMPOSITION COMPRISING: A. 92 TO 97% BY WEIGHT OF A PARTICULATE REFRACTORY MATERIAL, AND B. 3 TO 8% BY WEIGHT OF A BINDER COMPOSITION COMPRISING 1 10 TO 40% BY WEIGHT PITCH, 2.25 TO 80% BY WEIGHT OF AN AQUEOUS SOLUTION CONTAINING FROM 40% TO 60% BY WEIGHT OF AMMONIUM OR METAL LIGNOSULFONATE OR PHENOLALDEHYDE RESIN, 3. 10 TO 35% BY WEIGHT OF AN ORGANIC SOLVENT SOLUTION CONTAINING FROM 60% TO 100% OF AN ALKYD RESIN.
Claim 2
Dependent Claim
79 words
A REFRACTORY MOLDING COMPOSITION COMPRISING: A. 92 TO 97% BY WEIGHT OF A PARTICULATE REFRACTORY MATERIAL, AND B. 3 TO 8% BY WEIGHT OF A BINDER COMPOSITION COMPRISING 1 10 TO 40% BY WEIGHT PITCH, 2.25 TO 80% BY WEIGHT OF AN AQUEOUS SOLUTION CONTAINING FROM 40% TO 60% BY WEIGHT OF AMMONIUM OR METAL LIGNOSULFONATE OR PHENOLALDEHYDE RESIN, 3. 10 TO 35% BY WEIGHT OF AN ORGANIC SOLVENT SOLUTION CONTAINING FROM 60% TO 100% OF AN ALKYD RESIN.
Claim 3
Dependent Claim
24 words
25 to 80% by weight of an aqueous solution containing from 40% to 60% by weight of ammonium or metal lignosulfonate or phenolaldehyde resin;
Claim 4
Dependent Claim
24 words
25 to 80% by weight of an aqueous solution containing from 40% to 60% by weight of ammonium or metal lignosulfonate or phenolaldehyde resin;
Claim 5
Dependent Claim
19 words
The refractory molding composition of claim 1 which comprises 94 to 96% by weight of said particulate refractory material.
Claim 6
Dependent Claim
22 words
25% to 80% by weight of an aqueous solution of lignosulfonate, said solution containing from 40 to 60% of said lignosulfonate; and
Claim 7
Dependent Claim
22 words
25% to 80% by weight of an aqueous solution of lignosulfonate, said solution containing from 40 to 60% of said lignosulfonate; and
Claim 8
Dependent Claim
23 words
10 to 35% by weight of an organic solvent solution of alkyd resin, said solution containing from 70% to 100% of said alkyd.
Claim 9
Dependent Claim
23 words
10 to 35% by weight of an organic solvent solution of alkyd resin, said solution containing from 70% to 100% of said alkyd.
Claim 10
Dependent Claim
17 words
The refractory molding composition of claim 1 in which said particulate refractory material is high purity periclase.
Claim 11
Dependent Claim
19 words
10 to 35% by weight of an organic solvent solution containing from 60% to 100% of an alkyd resin.
Claim 12
Dependent Claim
19 words
10 to 35% by weight of an organic solvent solution containing from 60% to 100% of an alkyd resin.
Claim 13
Dependent Claim
18 words
The refractory molding composition of claim 1 which also contains from 1 to 4% by weight carbon black.
Claim 14
Dependent Claim
11 words
A shaped refractory article of the refractory composition of claim 1.
Claim 15
Dependent Claim
27 words
A refractory molding composition comprising: a. 92 to 97% by weight of a particulate refractory material; b. 3 to 8% by weight of a binder composition comprising
Claim 16
Dependent Claim
27 words
A refractory molding composition comprising: a. 92 to 97% by weight of a particulate refractory material; b. 3 to 8% by weight of a binder composition comprising
Claim 17
Dependent Claim
19 words
The refractory molding composition of claim 6 in which said alkyd resin is a fatty oil modified alkyd resin.
Claim 18
Dependent Claim
168 words
A process for preparing shaped refractory articles comprising: a. coating 60 to 80 parts by weight of a coarse refractory aggregate having a particle size between 4 mesh and 28 mesh Tyler standard screen with 1.0 to 3.0 parts by weight of an organic solvent solution of a thermosetting polymer containing 70 to 100% by weight of said thermosetting polymer, to obtain a coated coarse refractory aggregate; b. admixing 1 to 5 parts by weight powdered pitch with said coated coarse refractory aggregate to obtain a coated coarse refractory aggregate-pitch admixture; c. blending 20 to 40 parts by weight of a fine refractory aggregate having a particle size of less than 48 mesh Tyler standard screen, and 1 to 3 parts by weight of an aqueous solution of a water soluble resin containing 40 to 60% by weight of said water soluble resin with said coated coarse refractory aggregate-pitch admixture to obtain a refractory molding composition; and d. thereafter forming said refractory molding composition into shaped refractory articles.
Claim 19
Dependent Claim
168 words
A process for preparing shaped refractory articles comprising: a. coating 60 to 80 parts by weight of a coarse refractory aggregate having a particle size between 4 mesh and 28 mesh Tyler standard screen with 1.0 to 3.0 parts by weight of an organic solvent solution of a thermosetting polymer containing 70 to 100% by weight of said thermosetting polymer, to obtain a coated coarse refractory aggregate; b. admixing 1 to 5 parts by weight powdered pitch with said coated coarse refractory aggregate to obtain a coated coarse refractory aggregate-pitch admixture; c. blending 20 to 40 parts by weight of a fine refractory aggregate having a particle size of less than 48 mesh Tyler standard screen, and 1 to 3 parts by weight of an aqueous solution of a water soluble resin containing 40 to 60% by weight of said water soluble resin with said coated coarse refractory aggregate-pitch admixture to obtain a refractory molding composition; and d. thereafter forming said refractory molding composition into shaped refractory articles.
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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) | 1978-09-01 | 1979-03-03 | 1979-09-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-09-01 | 1983-03-03 | 1983-09-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-09-01 | 1987-03-03 | 1987-09-02 | $7700.00 | Window Closed / Lapsed |