US4026723A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Admixture of alkali-metal nitrate with water-soluble condensate of sulfonated aromatic hydrocarbon and aliphatic aldehyde
Assignee: Arcal Chemicals Inc
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Filing: 1975-10-30
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Granted: 1977-05-31
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Expires: 1995-10-30
Abstract
Abstract A composition comprising a major proportion of alkali-metal nitrate and a minor proportion of water-soluble condensate of sulfonated aromatic hydrocarbon with aliphatic aldehyde has a synergistic effect in accelerating the rate of set of concrete to which it is added.
Inventors
- 👤 Tibor T. Grof
- 👤 Gloven G. De La Cruz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 15:33
CPC Classifications
C; C04; C04B; C04B28/00; C04B28/02; C04B28/10; C04B2103/00; C04B2103/10; C04B2103/12
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
67 words
An essentially dry particulate cement-set accelerating composition comprising alkali-metal nitrate and a water-soluble member selected from the group consisting of: (a) (sulfonated aromatic hydrocarbon)/(aliphatic aldehyde) condensate and (b) an alkali-metal salt of (a), the composition having a greater weight percentage of the alkali-metal nitrate than of the water-soluble member, the components being present in a ratio sufficient to impart a synergistic set acceleration to a cement composition.
Claim 2
Dependent Claim
67 words
An essentially dry particulate cement-set accelerating composition comprising alkali-metal nitrate and a water-soluble member selected from the group consisting of: (a) (sulfonated aromatic hydrocarbon)/(aliphatic aldehyde) condensate and (b) an alkali-metal salt of (a), the composition having a greater weight percentage of the alkali-metal nitrate than of the water-soluble member, the components being present in a ratio sufficient to impart a synergistic set acceleration to a cement composition.
Claim 3
Dependent Claim
23 words
A composition according to claim 1 wherein the sulfonated aromatic hydrocarbon has at least two benzenoid rings and the aliphatic aldehyde is formaldehyde.
Claim 4
Dependent Claim
18 words
A composition according to claim 2 wherein the aromatic hydrocarbon is naphthalene and the water-soluble member is (b).
Claim 5
Dependent Claim
21 words
A composition according to claim 3 wherein the alkali-metal nitrate is sodium nitrate and (b) is the sodium salt of (a).
Claim 6
Dependent Claim
17 words
A composition according to claim 4 wherein the sodium salt of (a) is free from chloride salts.
Claim 7
Dependent Claim
15 words
A composition according to claim 4 wherein the sodium salt of (a) is salt free.
Claim 8
Dependent Claim
24 words
A composition according to claim 4 having 3 parts by weight of condensate for each 5 to 50 parts by weight of sodium nitrate.
Claim 9
Dependent Claim
23 words
A composition according to claim 4 having about 1 part by weight of condensate for each 8 parts by weight of sodium nitrate.
Claim 10
Dependent Claim
23 words
In a hardenable cement-containing admixture with a set accelerator, the improvement wherein the set accelerator is a chloride-free composition according to claim 1.
Claim 11
Dependent Claim
15 words
A hardenable cement-containing admixture having a set-accelerating proportion of a composition according to claim 2.
Claim 12
Dependent Claim
10 words
An aqueous solution of a composition according to claim 3.
Claim 13
Dependent Claim
16 words
A solution according to claim 11 having from 40 to 65 percent by weight of water.
Claim 14
Dependent Claim
22 words
A composition according to claim 10 in admixture with sufficient water to effect setting of the cement into a hard integral mass.
Claim 15
Dependent Claim
8 words
A composition according to claim 10 containing sand.
Claim 16
Dependent Claim
8 words
A composition according to claim 10 containing gravel.
Claim 17
Dependent Claim
8 words
A composition according to claim 14 containing gravel.
Claim 18
Dependent Claim
7 words
A concrete composition according to claim 13.
Claim 19
Dependent Claim
13 words
A composition according to claim 4 in admixture with sand and slaked lime.
Claim 20
Dependent Claim
32 words
A process for accelerating the set and reducing the water requirement of a hardenable cement-containing admixture which comprises incorporating in the admixture a set-accelerating proportion of a composition according to claim 4.
Claim 21
Dependent Claim
39 words
A process for accelerating the set and reducing the water requirement of a hardenable cement-containing admixture which comprises incorporating in the admixture a chloride-free liquid set accelerator which is an aqueous solution of a composition according to claim 4.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-05-30 | 1980-11-29 | 1981-05-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-05-30 | 1984-11-29 | 1985-05-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-05-30 | 1988-11-29 | 1989-05-31 | $7700.00 | Window Closed / Lapsed |