US4288252A
Expired / Lapsed
US
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Method of making low temperature curable silicate compositions
Assignee: PPG Industries Inc
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Filing: 1980-04-21
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Granted: 1981-09-08
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Expires: 2000-04-21
Abstract
Abstract A method is disclosed for making low temperature curable silicate compositions by combining a mixture of sodium and potassium silicates with the B-form of aluminum trimetaphosphate.
Inventors
- 👤 James E. Neely
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 14:44
CPC Classifications
C; C04; C04B; C04B28/00; C04B28/24; C04B28/26; C09; C09D; C09D1/00; C09D1/02; C09J; C09J1/00; C09J1/02; E; E06; E06B; E06B3/00; E06B3/66; E06B3/663; E06B3/66309; E06B3/66333
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
91 words
A method for making a waterstable composition from an aqueous silicate solution comprising a water soluble silicate and an inorganic curing agent which comprises the steps of: a. reacting an ammonia compound with aluminum dihydrogen phosphate to form a reaction product; b. heating said reaction product at a sufficient temperature for a sufficient time to produce predominantly B-form aluminum trimetaphosphate; c. combining said heated reaction product with a mixture of alkali metal silicates; and d. curing at a temperature between 150° C. and 250° C. until the composition is water stable.
Claim 2
Independent Claim
91 words
A method for making a waterstable composition from an aqueous silicate solution comprising a water soluble silicate and an inorganic curing agent which comprises the steps of: a. reacting an ammonia compound with aluminum dihydrogen phosphate to form a reaction product; b. heating said reaction product at a sufficient temperature for a sufficient time to produce predominantly B-form aluminum trimetaphosphate; c. combining said heated reaction product with a mixture of alkali metal silicates; and d. curing at a temperature between 150° C. and 250° C. until the composition is water stable.
Claim 3
Dependent Claim
33 words
The method according to claim 1, wherein the mixture of alkali metal silicates comprises from 25 to 75 percent by weight sodium silicate and from 25 to 75 percent by weight potassium silicate.
Claim 4
Dependent Claim
42 words
The method according to claim 2, wherein the sodium silicate has a mole ratio of SiO 2 /Na 2 O between 3.1 and 4.0 and the potassium silicate has a mole ratio of SiO 2 /K 2 O between 3.3 and 4.0.
Claim 5
Dependent Claim
19 words
The method according to claim 3, wherein the ratio of silicate to phosphate is at least 2.5:1 by weight.
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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) | 1984-09-07 | 1985-03-09 | 1985-09-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-09-07 | 1989-03-09 | 1989-09-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-09-07 | 1993-03-09 | 1993-09-08 | $7700.00 | Window Closed / Lapsed |