US4168984A
Expired / Lapsed
US
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Hydraulic cement mixes and process for improving cement mixes
Assignee: Sandoz AG
•
Filing: 1978-02-09
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Granted: 1979-09-25
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Expires: 1998-02-09
Abstract
Abstract Improved hydraulic cement mixes are made by incorporating into such mixes an admixture comprising at least one acetic acid ester of a glycol in an amount sufficient to increase the compressive strength of products made from such mixes. In portland-type cement mixes, these admixtures also act as set accelerators. In high-alumina cement mixes, the admixtures not only increase strength but also inhibit the spontaneous loss of strength which is generally characteristic of high-alumina cements. A preferred admixture is ethylene glycol diacetate in an amount of up to about 3.0% by weight based upon the weight of the cement, preferably in an amount of between about 0.01% and 2.0% by weight.
Inventors
- 👤 James A. Ray
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 01:17
CPC Classifications
C; C04; C04B; C04B24/00; C04B24/04; C04B24/045
Claims Analysis
Total Claims: 51
Claim 1
Independent Claim
60 words
A hydraulic cement mix containing hydraulic cement and an admixture comprising at least one acetic acid ester of a glycol, said admixture being present in an amount less than about 3% by weight based upon the weight of the cement and sufficient to increase the compressive strength of products in the set and hardened condition produced from said cement mix.
Claim 2
Dependent Claim
60 words
A hydraulic cement mix containing hydraulic cement and an admixture comprising at least one acetic acid ester of a glycol, said admixture being present in an amount less than about 3% by weight based upon the weight of the cement and sufficient to increase the compressive strength of products in the set and hardened condition produced from said cement mix.
Claim 3
Dependent Claim
24 words
The hydraulic cement mix of claim 1 containing at least about 0.01% of said esters by weight based upon the weight of the cement.
Claim 4
Dependent Claim
15 words
The hydraulic cement mix of claim 2 containing less than about 2% of said esters.
Claim 5
Dependent Claim
15 words
The hydraulic cement mix of claim 2 containing at least about 0.1% of said esters.
Claim 6
Dependent Claim
41 words
The hydraulic cement mix of claim 1 wherein said esters comprise a glycol acetate selected from the group consisting of ethylene glycol monoacetate, ethylene glycol diacetate, diethylene glycol monoacetate, diethylene glycol diacetate, triethylene glycol monoacetate, triethylene glycol diacetate, and combinations thereof.
Claim 7
Dependent Claim
15 words
The hydraulic cement mix of claim 5 wherein the glycol acetate is ethylene glycol diacetate.
Claim 8
Dependent Claim
24 words
The hydraulic cement mix of claim 6 containing at least about 0.01% ethylene glycol diacetate by weight based upon the weight of the cement.
Claim 9
Dependent Claim
15 words
The hydraulic cement mix of claim 7 containing less than about 2% ethylene glycol diacetate.
Claim 10
Dependent Claim
15 words
The hydraulic cement mix of claim 7 containing at least about 0.1% ethylene glycol diacetate.
Claim 11
Dependent Claim
15 words
The hydraulic cement mix of claim 7 containing at least about 0.5% ethylene glycol diacetate.
Claim 12
Dependent Claim
15 words
The hydraulic cement mix of claim 6 wherein the glycol acetate is triethylene glycol diacetate.
Claim 13
Dependent Claim
24 words
The hydraulic cement mix of claim 11 containing at least about 0.01% triethylene glycol diacetate by weight based upon the weight of the cement.
Claim 14
Dependent Claim
15 words
The hydraulic cement mix of claim 12 containing less than about 2% triethylene glycol diacetate.
Claim 15
Dependent Claim
14 words
The hydraulic cement mix of claim 6 wherein the admixture further includes a glucosaccharide.
Claim 16
Dependent Claim
26 words
The hydraulic cement mix of claim 14 containing about 0.5% ethylene glycol diacetate and about 0.05% glucosaccharide by weight based upon the weight of the cement.
Claim 17
Dependent Claim
14 words
The hydraulic cement mix of claim 14 wherein the hydraulic cement is portland-type cement.
Claim 18
Dependent Claim
14 words
The hydraulic cement mix of claim 15 wherein the hydraulic cement is portland-type cement.
Claim 19
Dependent Claim
14 words
The hydraulic cement mix of claim 6 wherein the admixture includes a soluble lignosulfonate.
Claim 20
Dependent Claim
18 words
The hydraulic cement mix of claim 18 containing about 0.5% ethylene glycol diacetate and about 0.25% soluble lignosulfonate.
Claim 21
Dependent Claim
14 words
The hydraulic cement mix of claim 18 wherein the hydraulic cement is portland-type cement.
Claim 22
Dependent Claim
14 words
The hydraulic cement mix of claim 19 wherein the hydraulic cement is portland-type cement.
Claim 23
Dependent Claim
38 words
A process for increasing the compressive strength of products in the set and hardened condition produced from hydraulic cement mixes comprising incorporating in said cement mixes an admixture comprising at least one acetic acid ester of a glycol.
Claim 24
Dependent Claim
38 words
A process for increasing the compressive strength of products in the set and hardened condition produced from hydraulic cement mixes comprising incorporating in said cement mixes an admixture comprising at least one acetic acid ester of a glycol.
Claim 25
Dependent Claim
36 words
The process of claim 22 wherein the amount of said esters incorporated in said hydraulic cement mix is at least about 0.01% by weight based on the weight of the cement in said hydraulic cement mix.
Claim 26
Dependent Claim
16 words
The process of claim 23 wherein the amount of said esters is less than about 3%.
Claim 27
Dependent Claim
16 words
The process of claim 23 wherein the amount of said esters is less than about 2%.
Claim 28
Dependent Claim
16 words
The process of claim 23 wherein the amount of said esters is about 0.1 to 2%.
Claim 29
Dependent Claim
39 words
The process of claim 24 wherein said esters comprise a glycol acetate selected from the group consisting of ethylene glycol monoacetate, ethylene glycol diacetate, diethylene glycol monoacetate, diethylene glycol diacetate, triethylene glycol monoacetate, triethylene glycol diacetate, and combinations thereof.
Claim 30
Dependent Claim
13 words
The process of claim 27 wherein the glycol acetate is ethylene glycol diacetate.
Claim 31
Dependent Claim
37 words
The process of claim 28 wherein the amount of said ethylene glycol diacetate incorporated in said hydraulic cement mix is about 0.01 to 3% by weight based upon the weight of the cement in the cement mix.
Claim 32
Dependent Claim
17 words
The process of claim 29 wherein the amount of ethylene glycol diacetate is about 0.1 to 2%.
Claim 33
Dependent Claim
13 words
The process of claim 27 wherein the glycol acetate is triethylene glycol diacetate.
Claim 34
Dependent Claim
34 words
The process of claim 31 wherein the triethylene glycol diacetate incorporated in said hydraulic cement mix is about 0.01 to 2% by weight based upon the weight of the cement in the cement mix.
Claim 35
Dependent Claim
15 words
The process of claim 28 further comprising incorporating in said hydraulic cement mix a glucosaccharide.
Claim 36
Dependent Claim
16 words
The process of claim 28 further comprising incorporating in said hydraulic cement mix a soluble lignosulfonate.
Claim 37
Dependent Claim
57 words
A process for increasing the compressive strength and accelerating the rate of hardening of products produced from portland-type cement mixes comprising incorporating in said portland-type cement mixes a glycol acetate selected from the group consisting of ethylene glycol monoacetate, ethylene glycol diacetate, diethylene glycol monoacetate, diethylene glycol diacetate, triethylene glycol monoacetate, triethylene glycol diacetate, and combinations thereof.
Claim 38
Dependent Claim
57 words
A process for increasing the compressive strength and accelerating the rate of hardening of products produced from portland-type cement mixes comprising incorporating in said portland-type cement mixes a glycol acetate selected from the group consisting of ethylene glycol monoacetate, ethylene glycol diacetate, diethylene glycol monoacetate, diethylene glycol diacetate, triethylene glycol monoacetate, triethylene glycol diacetate, and combinations thereof.
Claim 39
Dependent Claim
35 words
The process of claim 35 wherein the amount of said glycol acetate incorporated in said portland-type cement mix is about 0.01 to 3% by weight based upon the weight of the cement in said mix.
Claim 40
Dependent Claim
16 words
The process of claim 36 wherein the amount of glycol acetate is less than about 2%.
Claim 41
Dependent Claim
13 words
The process of claim 36 wherein the glycol acetate is ethylene glycol diacetate.
Claim 42
Dependent Claim
13 words
The process of claim 37 wherein the glycol acetate is ethylene glycol diacetate.
Claim 43
Dependent Claim
17 words
The process of claim 39 wherein the amount of ethylene glycol diacetate is about 0.5 to 2%.
Claim 44
Dependent Claim
13 words
The process of claim 37 wherein the glycol acetate is triethylene glycol diacetate.
Claim 45
Dependent Claim
71 words
A process for increasing the compressive strength of products in the set and hardened condition produced from high-alumina cement mixes and for inhibiting the spontaneous retrogression of such strength in such products with time comprising incorporating in said high-alumina cement mixes a glycol acetate selected from the group consisting of ethylene glycol monoacetate, ethylene glycol diacetate, diethylene glycol monoacetate, diethylene glycol diacetate, triethylene glycol monoacetate, triethylene glycol diacetate, and combinations thereof.
Claim 46
Dependent Claim
71 words
A process for increasing the compressive strength of products in the set and hardened condition produced from high-alumina cement mixes and for inhibiting the spontaneous retrogression of such strength in such products with time comprising incorporating in said high-alumina cement mixes a glycol acetate selected from the group consisting of ethylene glycol monoacetate, ethylene glycol diacetate, diethylene glycol monoacetate, diethylene glycol diacetate, triethylene glycol monoacetate, triethylene glycol diacetate, and combinations thereof.
Claim 47
Dependent Claim
36 words
The process of claim 42 wherein the amount of said glycol acetate incorporated in said high-alumina cement mix is less than about 1% by weight based upon the weight of the cement in said cement mix.
Claim 48
Dependent Claim
16 words
The process of claim 43 wherein the amount of glycol acetate is at least about 0.01%.
Claim 49
Dependent Claim
13 words
The process of claim 43 wherein the glycol acetate is ethylene glycol diacetate.
Claim 50
Dependent Claim
13 words
The process of claim 44 wherein the glycol acetate is ethylene glycol diacetate.
Claim 51
Dependent Claim
15 words
The process of claim 46 wherein the amount of ethylene glycol diacetate is about 0.1%.
References Cited (Backward Citations)
US1998667A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-09-24 | 1983-03-26 | 1983-09-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-09-24 | 1987-03-26 | 1987-09-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-09-24 | 1991-03-26 | 1991-09-25 | $7700.00 | Window Closed / Lapsed |