Patent US3658563A successfully refreshed from Google Patents.
US3658563A
Expired / Lapsed
US
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Production of refractory body
Assignee: Taki Chemical Co Ltd
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Filing: 1970-07-24
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Granted: 1972-04-25
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Expires: 1990-07-24
Abstract
Abstract The present invention relates to a method for providing a refractory body characterized by the use as a binder or aggregate therefor, of an aqueous solution of phosphoric acid and/or acid phosphate and an alkanolamine. This composition containing the aforementioned binder is stable for a long period of time, has excellent adhesion at normal temperature and exhibits an excellent bonding effect and strength at high temperatures.
Inventors
- 👤 Shigeaki Washio
- 👤 Masaharu Inoue
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 19:50
CPC Classifications
C; C04; C04B; C04B33/00; C04B33/02; C04B33/13; C04B33/1315
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
16 words
A process as claimed in claim 1 wherein the aqueous solution further contains a carboxylic acid.
Claim 2
Dependent Claim
36 words
A process as claimed in claim 1 wherein an aqueous solution of the phosphoric acid and acid phosphate or mixtures thereof is first mixed with an alkanolamine, and then the mixture is mixed with the aggregate.
Claim 3
Dependent Claim
39 words
A process as claimed in claim 2 wherein an aqueous solution of the phosphoric acid and acid phosphate and mixtures thereof, an alkanolamine and a carboxylic acid are mixed together, and then the mixture is mixed with the aggregate.
Claim 4
Dependent Claim
24 words
A process according to claim 1 wherein the number of carbon atoms in the alkanol moiety of said alkanolamine is not more than 5.
Claim 5
Dependent Claim
30 words
A process as claimed in claim 1 wherein said acid phosphate is a metal acid phosphate wherein the metal is at least one selected from Al, Mo, Ni and Zr.
Claim 6
Dependent Claim
15 words
A process as claimed in claim 2 wherein said carboxylic acid is an oxycarboxylic acid.
Claim 7
Dependent Claim
23 words
A process according to claim 2 wherein the amount of said carboxylic acid is 0.1 to 50 parts per 100 parts of P2O5.
Claim 8
Dependent Claim
32 words
A process according to claim 8 wherein the amount of the alkanolamine and the amount of the carboxylic acid are such that the resulting solution has a pH from 2.5 to 10.
Claim 9
Dependent Claim
92 words
A composition for producing a refractory body which consists essentially of an aggregate and a binder, said binder consisting essentially of an aqueous solution of a member consisting of phosphoric acid, acid phosphate or mixtures thereof, and an alkanolamine with not more than five carbon atoms in the alkanol moiety and having a pH from 2.5 to 10, wherein the amount of alkanolamine is 1 to 500 parts per 100 parts of P2O5, the amount of binder being 0.3 - 100 parts by weight as P2O5 per 100 parts of the aggregate.
Claim 10
Dependent Claim
15 words
A composition as claimed in claim 10 wherein the binder further comprises an oxy-carboxylic acid.
References Cited (Backward Citations)
US2072212A
Cited
US3316110A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-04-25 | 1975-10-25 | 1976-04-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-04-25 | 1979-10-25 | 1980-04-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-04-25 | 1983-10-25 | 1984-04-25 | $7700.00 | Window Closed / Lapsed |